Patent US2952762A successfully refreshed from Google Patents.
US3102183A
Expired / Lapsed
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Absolute temperature control
Assignee: General Dynamics Corp
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Filing: 1960-12-16
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Granted: 1963-08-27
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Expires: 1980-12-16
Abstract
No abstract record available.
Inventors
- 👤 John E R Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN COMBINATION, AN OSCILLATOR, SAID OSCILLATOR HAVING A FREQUENCY DETERMINING ELEMENT THE NATURAL FREQUENCY OF WHICH IS A FUNCTION OF TEMPERATURE, MEANS FOR MAINTAINING CONSTANT THE TEMPERATURE OF SAID ELEMENT CONSISTING OF AN EVACUATED ENVELOPE ENCLOSING SAID ELEMENT, A HEATING WIRE IN SAID ENVELOPE, A FOUR-SIDED BALANCED BRIDGE, ONE BRANCH OF SAID BRIDGE COMPRISING SAID HEATING WIRE, A SOURCE OF HEATING POWER, AND AN AMPLIFIER DEVICE WITH A CONTINUOUSLY AND SMOOTHLY VARIABLE IMPEDANCE COUPLED
Claim 2
Dependent Claim
74 words
IN COMBINATION, AN OSCILLATOR, SAID OSCILLATOR HAVING A FREQUENCY DETERMINING ELEMENT THE NATURAL FREQUENCY OF WHICH IS A FUNCTION OF TEMPERATURE, MEANS FOR MAINTAINING CONSTANT THE TEMPERATURE OF SAID ELEMENT CONSISTING OF AN EVACUATED ENVELOPE ENCLOSING SAID ELEMENT, A HEATING WIRE IN SAID ENVELOPE, A FOUR-SIDED BALANCED BRIDGE, ONE BRANCH OF SAID BRIDGE COMPRISING SAID HEATING WIRE, A SOURCE OF HEATING POWER, AND AN AMPLIFIER DEVICE WITH A CONTINUOUSLY AND SMOOTHLY VARIABLE IMPEDANCE COUPLED
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |