Patent USH193H successfully refreshed from Google Patents.
USH193H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic temperature equalizer
Assignee: United States Department of Agriculture
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Filing: 1986-06-09
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Granted: 1987-01-06
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Expires: 2006-06-09
Abstract
Abstract An electronic circuit has been devised for precisely controlling the temperature of one zone in response to a change in temperature in another zone. Two sensors, one in each zone, are wired in opposing polarity so as to emit a signal when a temperature imbalance occurs. The circuit is designed to actuate a temperature controller in response to the signal. One application for the device is the establishment of adiabatic conditions for a reaction by controlling the temperature of the zone surrounding the reaction vessel to coincide with that within the vessel.
Inventors
- 👤 Everett D. Bitner
- 👤 Earl B. Lancaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:25
CPC Classifications
B; B01; B01L; B01L7/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/22; B01J; B01J2208/00; B01J2208/00008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
An apparatus for controlling the temperature within a first zone so as to coincide with the temperature within a second zone comprising: (a) a first temperature sensor within said first zone and a second temperature sensor within said second zone, wherein said sensors are interconnected so as to generate an input signal when an imbalance in temperature occurs between said zones; (b) a signal conditioner for enhancing said input signal and for generating an output signal; (c) temperature control means responsive to said output signal for adjusting the temperature of said first zone to correspond to the temperature of said second zone.
Claim 2
Independent Claim
102 words
An apparatus for controlling the temperature within a first zone so as to coincide with the temperature within a second zone comprising: (a) a first temperature sensor within said first zone and a second temperature sensor within said second zone, wherein said sensors are interconnected so as to generate an input signal when an imbalance in temperature occurs between said zones; (b) a signal conditioner for enhancing said input signal and for generating an output signal; (c) temperature control means responsive to said output signal for adjusting the temperature of said first zone to correspond to the temperature of said second zone.
Claim 3
Dependent Claim
15 words
The apparatus as described in claim 1 wherein said temperature control means is a heater.
Claim 4
Dependent Claim
28 words
The apparatus as described in claim 1 and further comprising a feedback circuit from said temperature control means to said signal conditioner for further enhancing said input signal.
Claim 5
Dependent Claim
17 words
The apparatus as described in claim 1 wherein said first and second temperature sensors are identical thermocouples.
Claim 6
Dependent Claim
21 words
The apparatus as described in claim 1 wherein said first and second zones are in heat exchange relationship to one another.
Claim 7
Dependent Claim
16 words
The apparatus as described in claim 5 wherein said first zone totally encompasses said second zone.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |