US5203497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communicating thermostat
Assignee: Honeywell Inc
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Filing: 1991-12-20
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Granted: 1993-04-20
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Expires: 2011-12-20
Abstract
Abstract A thermostat providing external communication comprising two microprocessors. One microprocessor may be dedicated to the external communication while the other microprocessor runs the application programming. The thermostat is separated into a thermostat housing and subbase. One microprocessor may be located within the thermostat housing with the other located within the subbase. This allows for changing the applications programming through replacement either the housing or the subbase. Replacement of only one portion of the thermostat is cheaper and can be easier.
Inventors
- 👤 James W. Ratz
- 👤 Robert J. Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
231 words
A thermostat for control of an HVAC system, comprising: a temperature sensor for producing a temperature signal indicative of a local temperature; data entry means for entering time and temperature data into the thermostat; a clock, for producing a real time signal indicative of real time; data entry means for entering time and temperature data into the thermostat and for requesting display of thermostat data; a display means, connected to said data entry means, said temperature sensor and said clock, for displaying said time and temperature data, said real time and said local temperature, said data entry means being capable of modifying said display means; a first microprocessor connected to said temperature sensor, said data entry means, said clock, and said display means, said first microprocessor receiving data, said temperature signal and said real time signal and controlling said display means; a second microprocessor connected to said first microprocessor, said second microprocessor controlling the operation of the HVAC system in accordance with prestored instructions and user entered time and temperature data entered through said data entry means, said first microprocessor sending to said second microprocessor said temperature signal and said time and temperature data, said second microprocessor sending to said first microprocessor a HVAC system status, said thermostat being divided into a thermostat housing in a subbase, said thermostat carrying said data entry means, said temperature sensor, and said display means.
Claim 2
Dependent Claim
231 words
A thermostat for control of an HVAC system, comprising: a temperature sensor for producing a temperature signal indicative of a local temperature; data entry means for entering time and temperature data into the thermostat; a clock, for producing a real time signal indicative of real time; data entry means for entering time and temperature data into the thermostat and for requesting display of thermostat data; a display means, connected to said data entry means, said temperature sensor and said clock, for displaying said time and temperature data, said real time and said local temperature, said data entry means being capable of modifying said display means; a first microprocessor connected to said temperature sensor, said data entry means, said clock, and said display means, said first microprocessor receiving data, said temperature signal and said real time signal and controlling said display means; a second microprocessor connected to said first microprocessor, said second microprocessor controlling the operation of the HVAC system in accordance with prestored instructions and user entered time and temperature data entered through said data entry means, said first microprocessor sending to said second microprocessor said temperature signal and said time and temperature data, said second microprocessor sending to said first microprocessor a HVAC system status, said thermostat being divided into a thermostat housing in a subbase, said thermostat carrying said data entry means, said temperature sensor, and said display means.
Claim 3
Dependent Claim
26 words
The thermostat of claim 1, wherein: said first microprocessor is physically located in said thermostat housing; and said second microprocessor is physically located in said subbase.
Claim 4
Dependent Claim
17 words
The thermostat of claim 1, wherein: said first and second microprocessors are physically located in said subbase.
Claim 5
Dependent Claim
18 words
The thermostat of claim 1, wherein: said first and second microprocessors are physically located in said thermostat housing.
Claim 6
Dependent Claim
27 words
The thermostat unit of claim 1, wherein: said first microprocessor is physically located in said subbase; and said second microprocessor is physically located in said thermostat housing.
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) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |