US3260456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-operated error sensing circuit
Assignee: General Electric Co
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Filing: 1964-09-23
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Granted: 1966-07-12
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Willis A Boothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:34
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/26; F15; F15B; F15B5/00; F15B5/003; F15C; F15C1/00; F15C1/002; F15C1/14; F15C1/146; F15C1/22; G; G05; G05B; G05B1/00; G05B1/11; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A FLUID-OPERATED ERROE SENSING CIRCUIT COMPRISING SENSOR MEANS FOR GENERATING FIRST FLUID SIGNALS HAVING A FREQUENCY REPRESENTING THE MONITORED VALUE OF A CONTROL SYSTEM VARIABLE, RESONANT MEANS IN COMMUNICATION WITH SAID SENSOR MEANS FOR GENERATING SECOND FLUID SIGNALS REPRESENTING THE MONITORED VALUE OF THE CONTROL SYSTEM VARIABLE AS A FUNCTION OF TWO RESONT FREQUENCIES OF SAID RESONANT MEAN WHEREIN THE TWO RESONANT FREQUENCIES DEFINE A PREDETERMINED RANGE OF VALUES OF THE CONTROL SYSTEM VARIABLE, AND A FLUID AMPLIFIER DEVICE HAVING A POWER FLUID INLET, TWO CONTROL FLUID INLETS AND TWO POWER FLUID OUTLETS, A FIRST AND SECOND OF SAID CONTROL FLUID INLETS IN COMMUNICATION WITH SAID RESONANT MEANS, SAID FLUID AMPLIFIER DEVICE PROVIDING FLUID OUTPUT SIGNALS AT SAID POWER FLUID OUTLETS INDICATIVE OF THE DEVIATION OF THE CONTROL SYSTEM VARIABLE FROM A DESIRED VALUE THEREOF WHEREIN THE DESIRED VALUE IS REPRESENTED BY A FREQUENCY INTERMEDIATE THE TWO RESONANT FREQUENCIES, SID FLUID AMPLIFIER DEVICE HAVING NO MECHANICAL MOVING PARTS THEREBY AVOIDING FRICTIONAL WEAR AND PROVIDING HIGHLY RELIABLE CIRCUIT OPERATION.
Claim 2
Dependent Claim
168 words
A FLUID-OPERATED ERROE SENSING CIRCUIT COMPRISING SENSOR MEANS FOR GENERATING FIRST FLUID SIGNALS HAVING A FREQUENCY REPRESENTING THE MONITORED VALUE OF A CONTROL SYSTEM VARIABLE, RESONANT MEANS IN COMMUNICATION WITH SAID SENSOR MEANS FOR GENERATING SECOND FLUID SIGNALS REPRESENTING THE MONITORED VALUE OF THE CONTROL SYSTEM VARIABLE AS A FUNCTION OF TWO RESONT FREQUENCIES OF SAID RESONANT MEAN WHEREIN THE TWO RESONANT FREQUENCIES DEFINE A PREDETERMINED RANGE OF VALUES OF THE CONTROL SYSTEM VARIABLE, AND A FLUID AMPLIFIER DEVICE HAVING A POWER FLUID INLET, TWO CONTROL FLUID INLETS AND TWO POWER FLUID OUTLETS, A FIRST AND SECOND OF SAID CONTROL FLUID INLETS IN COMMUNICATION WITH SAID RESONANT MEANS, SAID FLUID AMPLIFIER DEVICE PROVIDING FLUID OUTPUT SIGNALS AT SAID POWER FLUID OUTLETS INDICATIVE OF THE DEVIATION OF THE CONTROL SYSTEM VARIABLE FROM A DESIRED VALUE THEREOF WHEREIN THE DESIRED VALUE IS REPRESENTED BY A FREQUENCY INTERMEDIATE THE TWO RESONANT FREQUENCIES, SID FLUID AMPLIFIER DEVICE HAVING NO MECHANICAL MOVING PARTS THEREBY AVOIDING FRICTIONAL WEAR AND PROVIDING HIGHLY RELIABLE CIRCUIT OPERATION.
References Cited (Backward Citations)
US2879467A
Cited
US2729751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |