US3624649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Period readout error checking apparatus
Assignee: Honeywell Inc
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Filing: 1969-10-10
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Granted: 1971-11-30
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Expires: 1989-10-10
Abstract
Abstract A system for supervising the reliability of a pulsating output device in which the period between adjacent pulses is indicative of a measured condition wherein a counter is energized in a first direction by a separate signal source having a fixed frequency during a first of said periods and the counter is energized in the opposite direction during a second of said periods whereby the difference indicated by the counter between the starting count and the finish count is indicative of the difference between the first and second periods.
Inventors
- 👤 Michael A Ranieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:52
CPC Classifications
G; G08; G08C; G08C25/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
A system for checking information at a central station from one of a plurality of remote stations connected to the central station over a transmission channel wherein the information is reported to the central station by a series of energy pulses and the period between adjacent pulses is indicative of the information to be obtained comprising: counting means associated with the central station for counting electrical pulses from a source including means to energize said counting means during the length of a first period between a first set of two adjacent energy pulses to count said electrical pulses in a first counting direction from a start count and including means to energize said counting means during the length of second period between a second set of two adjacent energy pulses to count said electrical pulses in an opposite counting direction to a finish count, and comparison means connected to said counting means and responsive to said finish count to determine the presence of a difference in the length of said first and second periods.
Claim 2
Independent Claim
174 words
A system for checking information at a central station from one of a plurality of remote stations connected to the central station over a transmission channel wherein the information is reported to the central station by a series of energy pulses and the period between adjacent pulses is indicative of the information to be obtained comprising: counting means associated with the central station for counting electrical pulses from a source including means to energize said counting means during the length of a first period between a first set of two adjacent energy pulses to count said electrical pulses in a first counting direction from a start count and including means to energize said counting means during the length of second period between a second set of two adjacent energy pulses to count said electrical pulses in an opposite counting direction to a finish count, and comparison means connected to said counting means and responsive to said finish count to determine the presence of a difference in the length of said first and second periods.
Claim 3
Dependent Claim
203 words
The invention of claim 1 wherein said counting means comprises: oscillator circuit means for providing said source of electrical pulses at a predetermined frequency, counter means for counting said electrical pulses, switch means for connecting said oscillator circuit means to said counter means, reversing means for reversing the operation of said counter means, pulse-responsive means in said central station connected to said switch means and said reversing means whereby upon receiving a first energy pulse said switch means is closed to energize said counter means to start a count of said electrical pulses, upon receiving a second energy pulse said switch means is opened to terminate said count of electrical pulses, upon receiving a third enErgy pulse said switch means is closed and said reversing means is actuated to reverse said counter to start reverse count of electrical pulses, and upon receiving a fourth energy pulse said switch means is opened to deenergize said counter means to terminate said reverse count of electrical pulses, said comparison means being connected to said counter means to be responsive to the difference between said count and said reverse count, and last means connected to said comparison means to respond to a predetermined difference in said counts.
Claim 4
Dependent Claim
44 words
The invention of claim 1 comprising error detection means connected to said comparison means to respond to a predetermined difference in a start count and said finish count and thus a predetermined difference in the length of said first period and said second period.
Claim 5
Dependent Claim
75 words
In the invention of claim 1 wherein said source comprises a constant-frequency electrical pulse source, and said counting means counts an output of said constant-frequency electrical pulse source and switch means responsive to energy pulses for energizing said count means to respond to said electrical pulses in one direction during the time of said first period and energizing said counting means to respond to said electrical pulses in the opposite direction during said second period.
References Cited (Backward Citations)
US3183436A
Cited
US3534403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |