US3557351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Property measurement signal filtering method and apparatus for eliminating predetermined components
Assignee: Industrial Nucleonics Corp
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Filing: 1967-04-12
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Granted: 1971-01-19
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Expires: 1987-04-12
Abstract
Abstract An error signal filtering technique for a control system wherein the rejection or cutoff bands of a filter circuit are shifted in accordance with the speed of the material being controlled. In one embodiment, the error signal from a thickness gauge is averaged over several complete cycles of a predominant uncontrollable frequency component. In another embodiment, an average value of an error signal from a sheet scanning gauge is provided for one or more zones extending down the length of the sheet by controlling the scanning speed of the gauge to provide signal integration over complete cycles of the predominant frequency component.
Inventors
- 👤 George I Doering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:46
CPC Classifications
G; G05; G05D; G05D5/00; G05D5/02; G05D5/03; B; B29; B29C; B29C48/00; B29C48/25; B29C48/92; G01; G01B; G01B7/00; G01B7/02; G01B7/06; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92114; B29C2948/92133; B29C2948/92152; B29C2948/92323; B29C2948/92466; B29C2948/92504; B29C2948/9258; B29C2948/92819; B29C2948/92961; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
135 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency dependent on the speed of said material, said method comprising the steps of: sensing the speed of said material in the vicinity of said gauge; and suppressing said predominant frequency component of said gauge signal by altering the band-pass of said gauge in accordance with said material speed to minimize the effect of said uncontrollable variations in said material property of said utilization device.
Claim 2
Independent Claim
135 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency dependent on the speed of said material, said method comprising the steps of: sensing the speed of said material in the vicinity of said gauge; and suppressing said predominant frequency component of said gauge signal by altering the band-pass of said gauge in accordance with said material speed to minimize the effect of said uncontrollable variations in said material property of said utilization device.
Claim 3
Independent Claim
131 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having more than one predominant frequency component dependent on the speed of said material, said method comprising the steps of: sensing the speed of said material in the vicinity of said gauge; and suppressing each of said predominant frequency components of said gauge signal in accordance with said material speed to minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 4
Independent Claim
131 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having more than one predominant frequency component dependent on the speed of said material, said method comprising the steps of: sensing the speed of said material in the vicinity of said gauge; and suppressing each of said predominant frequency components of said gauge signal in accordance with said material speed to minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 5
Dependent Claim
37 words
The method of claim 2 which includes the steps of: filtering out frequency components of said signal lying in narrow frequency bands; and the center frequency of said bands in accordance with the speed of said material.
Claim 6
Independent Claim
128 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said method comprising the step of; controlling the averaging time of said gauge signal in accordance with the speed of said material to average several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 7
Independent Claim
128 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said method comprising the step of; controlling the averaging time of said gauge signal in accordance with the speed of said material to average several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 8
Independent Claim
138 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said method comprising the steps of: measuring the speed of said material to provide a signal proportional thereto; and averaging said gaugE signal over a period of time proportional to said speed signal to average several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 9
Independent Claim
138 words
The method of adjusting a machine device having a property controlling member for providing a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said method comprising the steps of: measuring the speed of said material to provide a signal proportional thereto; and averaging said gaugE signal over a period of time proportional to said speed signal to average several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations in said material property on said utilization device.
Claim 10
Independent Claim
168 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property and a substantially constant width wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the step of; controlling the scanning speed of said gauge in accordance with the speed of said sheet to average said signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 11
Independent Claim
168 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property and a substantially constant width wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the step of; controlling the scanning speed of said gauge in accordance with the speed of said sheet to average said signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 12
Independent Claim
173 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property and a substantially constant width wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said signal as said gauge scans across the width of said sheet to provide an output signal and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; and maintaining the scanning speed of said gauge in accordance with said measured sheet speed to average said signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 13
Independent Claim
173 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property and a substantially constant width wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said signal as said gauge scans across the width of said sheet to provide an output signal and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; and maintaining the scanning speed of said gauge in accordance with said measured sheet speed to average said signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 14
Independent Claim
223 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; computing a scan time proportional to said measured sheet speed; measuring the width of said sheet; computing a scanning speed for said gauge proportional to the ratio of said measured sheet width to said computed scan time; and moving said gauge across said sheet at said computed scanning speed to provide an error signal averaged over several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said control signal.
Claim 15
Independent Claim
223 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; computing a scan time proportional to said measured sheet speed; measuring the width of said sheet; computing a scanning speed for said gauge proportional to the ratio of said measured sheet width to said computed scan time; and moving said gauge across said sheet at said computed scanning speed to provide an error signal averaged over several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said control signal.
Claim 16
Independent Claim
194 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: maintaining the scanning speed of said gauge in accordance with the speed of said sheet to average said error signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said control signal; and controlling said property controlling member in accordance with said control signal.
Claim 17
Independent Claim
194 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: maintaining the scanning speed of said gauge in accordance with the speed of said sheet to average said error signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said control signal; and controlling said property controlling member in accordance with said control signal.
Claim 18
Independent Claim
232 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; dividing the width of said sheet into a plurality of zones; computing a scan time for each zone in accordance with the measured sheet speed to provide a control signal for each zone averaged over an integral number of cycles of said predominant frequency component; maintaining an average scan speed for each zone in accordance with said computed scan time; and automatically controlling each appropriate section of said property controlling member in accordance with the control signal associated with the zone controlled by said section.
Claim 19
Independent Claim
232 words
The method of adjusting a machine device having a property controlling member for providing a length of sheet material having a controlled property wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said method comprising the steps of: measuring the speed of said sheet; dividing the width of said sheet into a plurality of zones; computing a scan time for each zone in accordance with the measured sheet speed to provide a control signal for each zone averaged over an integral number of cycles of said predominant frequency component; maintaining an average scan speed for each zone in accordance with said computed scan time; and automatically controlling each appropriate section of said property controlling member in accordance with the control signal associated with the zone controlled by said section.
Claim 20
Dependent Claim
121 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having more than one predominant frequency component dependent on the speed of said material, said apparatus comprising: means for providing an indication of the speed of said material; and means responsive to said speed indication for suppressing each of said predominant frequency components of said gauge signal to minimize the effect of said controllable variations on said utilization device.
Claim 21
Dependent Claim
121 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having more than one predominant frequency component dependent on the speed of said material, said apparatus comprising: means for providing an indication of the speed of said material; and means responsive to said speed indication for suppressing each of said predominant frequency components of said gauge signal to minimize the effect of said controllable variations on said utilization device.
Claim 22
Dependent Claim
28 words
Control apparatus as in claim 11 wherein said frequency suppressing means comprises a band-pass filter having an upper cutoff frequency adjustable in accordance with said material speed indication.
Claim 23
Dependent Claim
20 words
Control apparatus as in claim 11 wherein said frequency suppressing means comprises a resistance-capacitance circuit having an adjustable time constant.
Claim 24
Dependent Claim
31 words
Control apparatus as in claim 11 wherein said frequency suppressing means comprises a plurality of slot filters each having a different center-frequency adjustable in accordance with the speed of said material.
Claim 25
Dependent Claim
121 words
Control apparatus for adjusting a property conTrolling member to provide a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having a plurality of predominant frequency components dependent on the speed of said material, said apparatus comprising; means for providing an indication of the speed of said material, and means responsive to said speed indication for suppressing each of said predominant frequency components of said gauge signal to minimize the effect of said uncontrollable variations on said utilization device.
Claim 26
Dependent Claim
121 words
Control apparatus for adjusting a property conTrolling member to provide a length of material having a controlled property wherein a gauge device provides a signal derived from a measurement of variations in said material property, and a utilization device is responsive to said gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having a plurality of predominant frequency components dependent on the speed of said material, said apparatus comprising; means for providing an indication of the speed of said material, and means responsive to said speed indication for suppressing each of said predominant frequency components of said gauge signal to minimize the effect of said uncontrollable variations on said utilization device.
Claim 27
Dependent Claim
156 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge-controller provides a control signal derived from a measurement of variations in said material property, and an actuator responsive to said control signal is coupled to said property controlling member to correct variations in said material property, said period between successive corrections being equal to or greater than the transportation time required for material to travel from said property-controlling member to said gauge-controller, said transportation time being a function of the speed of said material, said apparatus comprising: means for generating a signal proportional to the speed of said material, low pass filter means having an adjustable high frequency cutoff, and means responsive to said speed signal for automatically adjusting said filter high frequency cutoff to substantially eliminate from said control signal the effect of property variations having a frequency greater than the reciprocal transportation time.
Claim 28
Dependent Claim
156 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge-controller provides a control signal derived from a measurement of variations in said material property, and an actuator responsive to said control signal is coupled to said property controlling member to correct variations in said material property, said period between successive corrections being equal to or greater than the transportation time required for material to travel from said property-controlling member to said gauge-controller, said transportation time being a function of the speed of said material, said apparatus comprising: means for generating a signal proportional to the speed of said material, low pass filter means having an adjustable high frequency cutoff, and means responsive to said speed signal for automatically adjusting said filter high frequency cutoff to substantially eliminate from said control signal the effect of property variations having a frequency greater than the reciprocal transportation time.
Claim 29
Dependent Claim
148 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, an averaging device averages said gauge signal, and a utilization device is responsive to averaged gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said apparatus comprising: means for generating a signal proportional to the speed of said material, means responsive to said speed signal for computing an averaging time substantially equal to the time required for several complete cycles of one said predominant frequency component, and means for averaging said gauge signal over said computed averaging time to minimize the effect of said uncontrollable variations on said utilization device.
Claim 30
Dependent Claim
148 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge provides a signal derived from a measurement of variations in said material property, an averaging device averages said gauge signal, and a utilization device is responsive to averaged gauge signal, a portion of said property variations being uncontrollable and reflected in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said apparatus comprising: means for generating a signal proportional to the speed of said material, means responsive to said speed signal for computing an averaging time substantially equal to the time required for several complete cycles of one said predominant frequency component, and means for averaging said gauge signal over said computed averaging time to minimize the effect of said uncontrollable variations on said utilization device.
Claim 31
Dependent Claim
163 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge-controller averages a signal derived from a measurement of variations in said material property, and an actuator responsive to said averaged signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected in said signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said apparatus comprising: a tachometer coupled to said material for providing a signal proportional to the speed of said sheet, switch means coupling said signal to said averaging circuit, and an averaging time computer responsive to the magnitude of said speed signal for controlling the operation of said switch means for averaging said signal over a plurality of complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said actuator.
Claim 32
Dependent Claim
163 words
Control apparatus for adjusting a property controlling member to provide a length of material having a controlled property wherein a gauge-controller averages a signal derived from a measurement of variations in said material property, and an actuator responsive to said averaged signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected in said signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said material, said apparatus comprising: a tachometer coupled to said material for providing a signal proportional to the speed of said sheet, switch means coupling said signal to said averaging circuit, and an averaging time computer responsive to the magnitude of said speed signal for controlling the operation of said switch means for averaging said signal over a plurality of complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said actuator.
Claim 33
Dependent Claim
164 words
Control apParatus for adjusting a property controlling member to provide a length of sheet material having a controlled property and a substantially constant width, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal, and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising; means for controlling the scanning speed of said gauge in accordance with the speed of said sheet to average said gauge signal over several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said utilization device.
Claim 34
Dependent Claim
164 words
Control apParatus for adjusting a property controlling member to provide a length of sheet material having a controlled property and a substantially constant width, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal, and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising; means for controlling the scanning speed of said gauge in accordance with the speed of said sheet to average said gauge signal over several complete cycles of said predominant frequency component to minimize the effect of said uncontrollable variations on said utilization device.
Claim 35
Dependent Claim
171 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property and a substantially constant width, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal, and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: means for measuring the speed of said sheet, and means responsive to said measured sheet speed for controlling the scanning speed of said gauge to average said gauge signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 36
Dependent Claim
171 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property and a substantially constant width, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide a signal proportional to deviations in said material property, an averaging device averages said gauge signal as said gauge scans across the width of said sheet to provide an output signal, and a utilization device is responsive to said output signal, a portion of said property variations being uncontrollable and reflected as variations in said gauge signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: means for measuring the speed of said sheet, and means responsive to said measured sheet speed for controlling the scanning speed of said gauge to average said gauge signal over several complete cycles of said predominant frequency component and minimize the effect of said uncontrollable variations on said utilization device.
Claim 37
Dependent Claim
232 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an averaging device averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: means for measuring the speed of said sheet, means for computing a scan time proportional to said measured sheet speed and equal to an interval of time required for an integral number of complete cycles of said predominant frequency component, means for measuring the width of said sheet, means responsive to said measured sheet width and computed scan time for providing a scanning speed signal, and drive means responsive to said scanning speed signal for moving said gauge across said sheet at a preferred speed to minimize the effect of uncontrollable variations on said averaged error signal.
Claim 38
Dependent Claim
232 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an averaging device averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: means for measuring the speed of said sheet, means for computing a scan time proportional to said measured sheet speed and equal to an interval of time required for an integral number of complete cycles of said predominant frequency component, means for measuring the width of said sheet, means responsive to said measured sheet width and computed scan time for providing a scanning speed signal, and drive means responsive to said scanning speed signal for moving said gauge across said sheet at a preferred speed to minimize the effect of uncontrollable variations on said averaged error signal.
Claim 39
Dependent Claim
269 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an averaging device averages said error signal as saiD gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: a tachometer coupled to said sheet for providing a signal proportional to the speed of said sheet, means for measuring the average value of said property in each of a plurality of zones of predetermined width extending down the length of said sheet including, means responsive to said sheet speed signal for providing a zone scan time substantially equal to the time required for an integral number of complete cycles of said predominant frequency component, and means for controlling the speed of said gauge across each of said zones in accordance with said zone scan time, said average value measuring means providing a zone control signal from which the effect of said uncontrollable variations in said property is substantially eliminated, and means for utilizing said measured average property values for each of said zones.
Claim 40
Dependent Claim
269 words
Control apparatus for adjusting a property controlling member to provide a length of sheet material having a controlled property, wherein a gauge is movable from one side of said sheet to the other to scan said sheet and provide an error signal proportional to deviations in said material property from a target value therefor, an averaging device averages said error signal as saiD gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said property controlling member to control said variations in said material property, a portion of said property variations being uncontrollable and reflected as variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: a tachometer coupled to said sheet for providing a signal proportional to the speed of said sheet, means for measuring the average value of said property in each of a plurality of zones of predetermined width extending down the length of said sheet including, means responsive to said sheet speed signal for providing a zone scan time substantially equal to the time required for an integral number of complete cycles of said predominant frequency component, and means for controlling the speed of said gauge across each of said zones in accordance with said zone scan time, said average value measuring means providing a zone control signal from which the effect of said uncontrollable variations in said property is substantially eliminated, and means for utilizing said measured average property values for each of said zones.
Claim 41
Dependent Claim
29 words
Control apparatus as set forth in claim 22 which further includes means for selectively controlling said property controlling member in accordance with the control signal associated with the zone.
Claim 42
Dependent Claim
265 words
Control apparatus for adjusting a thickness controlling member to provide a sheet of material having a desired thickness, wherein a gauge is movable from one side of the sheet to the other to scan said sheet and provide an error signal proportional to deviations in the thickness of said material from said desired value, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said thickness controlling member to control said thickness variations, a portion of said thickness variations being uncontrollable and reflected as periodic variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: a tachometer for providing a voltage proportional to the speed of said sheet, circuit means for measuring the average thickness of said sheet in each of a plurality of zones extending down the length of said sheet including, a gauge for providing a signal indicative of the width of each zone, computer means responsive to said tachometer voltage and said zone width signals for providing a zone scan time substantially equal to the time required for an integral number of complete cycles of said predominant frequency component, and scan controller means responsive to said computed zone scan times for controlling the speed of said thickness gauge across each of said zones, said integrator providing an average thickness signal for each zone from which the effect of said uncontrollable thickness variations is substantially eliminated.
Claim 43
Dependent Claim
265 words
Control apparatus for adjusting a thickness controlling member to provide a sheet of material having a desired thickness, wherein a gauge is movable from one side of the sheet to the other to scan said sheet and provide an error signal proportional to deviations in the thickness of said material from said desired value, an integrator averages said error signal as said gauge scans across the width of said sheet to provide a control signal and an actuator responsive to said control signal is coupled to said thickness controlling member to control said thickness variations, a portion of said thickness variations being uncontrollable and reflected as periodic variations in said error signal, said uncontrollable variations having at least one predominant frequency component dependent on the speed of said sheet, said apparatus comprising: a tachometer for providing a voltage proportional to the speed of said sheet, circuit means for measuring the average thickness of said sheet in each of a plurality of zones extending down the length of said sheet including, a gauge for providing a signal indicative of the width of each zone, computer means responsive to said tachometer voltage and said zone width signals for providing a zone scan time substantially equal to the time required for an integral number of complete cycles of said predominant frequency component, and scan controller means responsive to said computed zone scan times for controlling the speed of said thickness gauge across each of said zones, said integrator providing an average thickness signal for each zone from which the effect of said uncontrollable thickness variations is substantially eliminated.
Claim 44
Independent Claim
110 words
A system for deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet comprising a gauge for deriving a response indicative of the property, means for scanning the gauge across the sheet in a direction between the sheet edges, means for controlling the scanning velocity of the gauge in response to an indication of the speed of the sheet in said first direction, and means for indicating the average value of the gauge response over the period while it scans across at least a predetermined portion of the sheet.
Claim 45
Independent Claim
110 words
A system for deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet comprising a gauge for deriving a response indicative of the property, means for scanning the gauge across the sheet in a direction between the sheet edges, means for controlling the scanning velocity of the gauge in response to an indication of the speed of the sheet in said first direction, and means for indicating the average value of the gauge response over the period while it scans across at least a predetermined portion of the sheet.
Claim 46
Dependent Claim
52 words
The system of claim 25 wherein said scanning velocity control means includes means responsive to the mOvement of the sheet in the first direction for deriving a signal indicative of the sheet speed in the first direction, and means for controlling the gauge scanning velocity in response to the sheet speed signal.
Claim 47
Independent Claim
103 words
A method of indicating the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet comprising the steps of scanning a gauge for the property in a direction between the sheet edges at a speed determined by the speed of the sheet in the first direction, and indicating the average value of the gauge response over the period while it scans across at least a portion of the sheet, the average value being determined for a time interval commensurate with at least one of the spatial variations.
Claim 48
Independent Claim
103 words
A method of indicating the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet comprising the steps of scanning a gauge for the property in a direction between the sheet edges at a speed determined by the speed of the sheet in the first direction, and indicating the average value of the gauge response over the period while it scans across at least a portion of the sheet, the average value being determined for a time interval commensurate with at least one of the spatial variations.
Claim 49
Independent Claim
137 words
A system for deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet, said sheet being divided into a plurality of cross sheet zones each running along the length of the sheet, said spatial variations being susceptible to different periodicities in the different zones, comprising a gauge for detecting the property, means for scanning the gauge in a direction between the edges of the sheet, means for controlling the scanning velocity of the gauge in each of the zones in response to indications of the sheet velocity in the first direction and the spatial periodicity for the zone where the gauge is located, and means for separately averaging the guage response for each of said zones.
Claim 50
Independent Claim
137 words
A system for deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet, said sheet being divided into a plurality of cross sheet zones each running along the length of the sheet, said spatial variations being susceptible to different periodicities in the different zones, comprising a gauge for detecting the property, means for scanning the gauge in a direction between the edges of the sheet, means for controlling the scanning velocity of the gauge in each of the zones in response to indications of the sheet velocity in the first direction and the spatial periodicity for the zone where the gauge is located, and means for separately averaging the guage response for each of said zones.
Claim 51
Dependent Claim
52 words
The system of claim 28 wherein said scanning velocity control means includes means responsive to the movement of the sheet in the first direction for deriving a signal indicative of the sheet speed in the first direction, and means for controlling the gauge scanning velocity in response to the sheet speed signal.
Claim 52
Independent Claim
152 words
A method of deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet, said sheet being divided into a plurality of cross sheet zones each running along the length of the sheet, said spatial variations being susceptible to different periodicities in the different zones, comprising scanning a gauge for detecting the property in a direction between the edges of the sheet, controlling the scanning velocity of the gauge in each of the zones in response to indications of the sheet velocity in the first direction and the spatial periodicity for the zone where the gauge is located, and separately averaging the gauge response while the gauge scans across each of said zones, the average value being determined for a time interval commensurate with at least one of the spatial periodic variations.
Claim 53
Independent Claim
152 words
A method of deriving an indication of the average value of a property of a sheet translating longitudinally in a first direction without indicating the magnitude of spatial periodic variations imposed on the sheet, said sheet being divided into a plurality of cross sheet zones each running along the length of the sheet, said spatial variations being susceptible to different periodicities in the different zones, comprising scanning a gauge for detecting the property in a direction between the edges of the sheet, controlling the scanning velocity of the gauge in each of the zones in response to indications of the sheet velocity in the first direction and the spatial periodicity for the zone where the gauge is located, and separately averaging the gauge response while the gauge scans across each of said zones, the average value being determined for a time interval commensurate with at least one of the spatial periodic variations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |