US4361011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic cooling system
Assignee: United States Department of the Army
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Filing: 1981-09-09
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Granted: 1982-11-30
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Expires: 2001-09-09
Abstract
Abstract In order to conserve battery power of an electrically-operated cryogenic ler for an infrared imaging detector, a control logic is inserted between the battery and the cooler. This logic operates to maintain the detector at a higher than optimum operating temperature in a "STANDBY" mode, but holds the detector at optimum temperature in an "ON" mode.
Inventors
- 👤 Robert E. Callender
- 👤 James T. Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
F; F25; F25B; F25B49/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A cryogenic cooling system including an electrically-powered cooling head means, a temperature sensor for said cooling head, a battery for powering said means, the improvement comprising: a control means between said battery and said cooling head means, said control means including: means, responsive to said temperature sensor for controlling said battery to said cooling head means until a first predetermined temperature of said cooling head is reached; means, responsive to manual control and to said temperature sensor, for connecting said battery to said cooling head means until a second predetermined temperature of said cooling head means is reached, whereby said second temperature is lower than the first and whereby first temperature is maintained until the last-mentioned means responsive is operated.
Claim 2
Dependent Claim
120 words
A cryogenic cooling system including an electrically-powered cooling head means, a temperature sensor for said cooling head, a battery for powering said means, the improvement comprising: a control means between said battery and said cooling head means, said control means including: means, responsive to said temperature sensor for controlling said battery to said cooling head means until a first predetermined temperature of said cooling head is reached; means, responsive to manual control and to said temperature sensor, for connecting said battery to said cooling head means until a second predetermined temperature of said cooling head means is reached, whereby said second temperature is lower than the first and whereby first temperature is maintained until the last-mentioned means responsive is operated.
Claim 3
Dependent Claim
52 words
The system as set forth in claim 1 wherein said cooling head means includes: a compressor; a cooling head; passageways between said compressor and said cooling head; a cryogen in said compressor, in said cooling head, and in said passageways; and an electric motor mechanically connected to said compressor for operating same.
Claim 4
Dependent Claim
17 words
The system as set forth in claim 1 wherein said cooling head means is a thermoelectric device.
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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |