US3656140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state timing control for single cycle progressive lubricating systems
Assignee: Cleveland Gear Co
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Filing: 1970-11-25
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Granted: 1972-04-11
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Expires: 1990-11-25
Abstract
Abstract A lubrication control system for dispensing a measured amount of lubricant within a predetermined period of time having a lubrication dispensing piston, an electronic timing circuit responsive to movement of the piston and a warning device controlled by the timing circuit for signalling a failure of the lubricating system to dispense an amount of lubricant within the predetermined time interval.
Inventors
- 👤 Thomas J Gruber
- 👤 William W Lyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:41
CPC Classifications
F; F16; F16N; F16N29/00; F16N29/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
172 words
In a flow-monitoring system having a cyclic manifold and a piston which moves in response to fluid being supplied to said manifold, a source of electrical power, a warning device and a solid state switching device interconnected between said source and said warning device, said solid state switching device adapted to selectively energize said warning device in the event fluid does not flow within a predetermined interval of time, a control for said switching device comprising a switch which opens and closes in response to the movement of said piston, an energy storage device which charges at a predetermined rate when the switch is open, means for discharging said electrical energy storage device when said switch is closed, means for causing said energy storage device to charge when said switch remains closeD for a predetermined interval of time, and a trigger circuit responsive to the charge on said electrical storage device for selectively activating said solid state switching device when said charge exceeds a predetermined value whereby said warning device is energized.
Claim 2
Dependent Claim
172 words
In a flow-monitoring system having a cyclic manifold and a piston which moves in response to fluid being supplied to said manifold, a source of electrical power, a warning device and a solid state switching device interconnected between said source and said warning device, said solid state switching device adapted to selectively energize said warning device in the event fluid does not flow within a predetermined interval of time, a control for said switching device comprising a switch which opens and closes in response to the movement of said piston, an energy storage device which charges at a predetermined rate when the switch is open, means for discharging said electrical energy storage device when said switch is closed, means for causing said energy storage device to charge when said switch remains closeD for a predetermined interval of time, and a trigger circuit responsive to the charge on said electrical storage device for selectively activating said solid state switching device when said charge exceeds a predetermined value whereby said warning device is energized.
Claim 3
Dependent Claim
14 words
The flow-monitoring system of claim 1 wherein said electrical storage device is a condenser.
Claim 4
Dependent Claim
32 words
The flow-monitoring system in claim 1 wherein said discharge means includes a transistor which is rendered conductive when said switch is closed thereby providing a discharge path for said energy storage device.
Claim 5
Dependent Claim
46 words
The flow-monitoring system in claim 3 wherein said means for causing said energy storage device to charge when said switch remains closed for a second predetermined interval of time includes a timing means adapted to render said transistor nonconductive after said second predetermined interval of time.
Claim 6
Dependent Claim
15 words
The flow-monitoring system in claim 4 wherein said timing means comprises a resistor and condenser.
Claim 7
Dependent Claim
29 words
The flow-monitoring system of claim 1 wherein said trigger circuit includes a unijunction transistor which is activated when the charge on said energy storage device reaches a predetermined level.
Claim 8
Dependent Claim
191 words
In a flow-monitoring system having a cyclic manifold and a piston which moves in response to fluid being supplied to said manifold, a source of electrical power, a warning device and a solid state switching device interconnected between said source and said warning device, said solid state switching device adapted to selectively energize said warning device in the event fluid does not flow within a first predetermined interval of time, a control for said switching device comprising a switch which opens and closes in response to the movement of said piston, a condenser which charges at a predetermined rate when the switch is open, means for discharging said condenser including a transistor which is rendered conductive when said switch is closed thereby providing a discharge path, a timing means adapted to render said transistor nonconductive thereby causing said condenser to charge at said predetermined rate when said switch remains closed for a second predetermined interval of time, and a trigger circuit responsive to the charge on said electrical storage device for selectively activating said solid state switching device when said charge exceeds a predetermined value whereby said warning device is energized.
Claim 9
Dependent Claim
191 words
In a flow-monitoring system having a cyclic manifold and a piston which moves in response to fluid being supplied to said manifold, a source of electrical power, a warning device and a solid state switching device interconnected between said source and said warning device, said solid state switching device adapted to selectively energize said warning device in the event fluid does not flow within a first predetermined interval of time, a control for said switching device comprising a switch which opens and closes in response to the movement of said piston, a condenser which charges at a predetermined rate when the switch is open, means for discharging said condenser including a transistor which is rendered conductive when said switch is closed thereby providing a discharge path, a timing means adapted to render said transistor nonconductive thereby causing said condenser to charge at said predetermined rate when said switch remains closed for a second predetermined interval of time, and a trigger circuit responsive to the charge on said electrical storage device for selectively activating said solid state switching device when said charge exceeds a predetermined value whereby said warning device is energized.
Claim 10
Dependent Claim
16 words
The flow-monitoring system of claim 7 wherein said timing means comprises a resistor and a capacitor.
References Cited (Backward Citations)
US2676315A
Cited
US3127954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |