Patent US4798142B1 successfully refreshed from Google Patents.
US3581986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for automatically controlling the temperature in heating or conditioning systems
Assignee: COSTER TECNOLOGIC ELETTRONICHE
•
Filing: 1969-05-05
•
Granted: 1971-06-01
•
Expires: 1989-05-05
Abstract
Abstract An automatic temperature control circuit comprising a bridge having three parallel branches, each provided with a supply resistor of a high ohmic value relative to series connected resistors, the resistors for two of the branches being thermoresistances measuring the external temperature and the average temperature for the heat transfer means, respectively, and the resistor for the third branch being series connected to a settable impedance means for setting the desired room temperature.
Inventors
- 👤 Antonio Magri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909; G05D23/1912; G05D23/1927; G05D23/193; G05D23/1931
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A circuit for automatically temperature controlling, comprising: means for generating a signal proportional to the temperature differential between a room to be controlled and the external environment, means for generating a signal proportional to the temperature differential between the heating or conditioning means and the external environment, means for comparing the temperature differentials to provide a signal for controlling the heating or conditioning means, said circuit including three parallel branches, series connected resistors in each branch, at least one of said resistors in each branch having a high ohmic value relative to the other of said series connected resistors in each branch, at least one of said series connected resistors in two of said branches being thermoresistances measuring the external temperature and the average temperature for heat transfer means, respectively, and a settable impedance means for setting the desired room temperature and connected in series with said resistors of the third branch.
Claim 2
Dependent Claim
152 words
A circuit for automatically temperature controlling, comprising: means for generating a signal proportional to the temperature differential between a room to be controlled and the external environment, means for generating a signal proportional to the temperature differential between the heating or conditioning means and the external environment, means for comparing the temperature differentials to provide a signal for controlling the heating or conditioning means, said circuit including three parallel branches, series connected resistors in each branch, at least one of said resistors in each branch having a high ohmic value relative to the other of said series connected resistors in each branch, at least one of said series connected resistors in two of said branches being thermoresistances measuring the external temperature and the average temperature for heat transfer means, respectively, and a settable impedance means for setting the desired room temperature and connected in series with said resistors of the third branch.
Claim 3
Dependent Claim
42 words
A circuit, as set forth in claim 1 wherein said thermoresistance for measuring the average temperature of the heat transfer means comprises two identical thermoresistances, one on the outlet side and the other on the return side of said heat transfer means.
Claim 4
Dependent Claim
37 words
The circuit, as set forth in claim 1, further comprising a divider for circuit calibration is interposed across two parallel branches at an intermediate location thereof, ahead of said thermoresistances, but following the high ohmic value resistors.
Claim 5
Dependent Claim
15 words
The circuit, as set forth in claim 1, wherein said impedance means is a potentiometer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |