US3724534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone control system with priority of service
Assignee: Weather Rite Inc
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Filing: 1971-11-26
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Granted: 1973-04-03
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Expires: 1991-11-26
Abstract
Abstract A control system for heating and cooling a plurality of zones in which each zone has a thermostat. The total amount of heating and cooling supplied is controlled by an electronic scanning system which periodically samples each of the zone thermostats and adjusts the overall heating and cooling means according to the sum of the zone requirements. Zones which are assigned a greater importance are attached to more than one input of the scanning system so as to have a greater effect on the scanning system so as to receive priority of service.
Inventors
- 👤 R Weatherston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:25
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/50; F24F11/61; F24F11/62; F24F11/63; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1932; G05D23/1934; F24F11/30; F24F2110/00; F24F2110/10; F24F2221/00; F24F2221/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A multiple zone temperature control system having a priority of service capability comprising: heating and cooling means connected to supply heating and cooling to a plurality of zones; a plurality of temperature measuring means, one in each zone, a scanning means having a plurality of inputs connected to said temperature measuring means operable to sequentially pass signals therefrom indicative of whether each temperature measuring means is calling for heating or cooling, the particular temperature measuring means located in priority areas being connected to more than one of said plurality of inputs; summing means connected to said scanning means operable to produce an output signal indicative of the algebraic sum of the number of inputs connected to temperature measuring means calling for one of the states of heating or cooling; and control means connected to said summing means and said heating and cooling means operable to vary the heating and cooling means in response to the sum from said summing means.
Claim 2
Dependent Claim
160 words
A multiple zone temperature control system having a priority of service capability comprising: heating and cooling means connected to supply heating and cooling to a plurality of zones; a plurality of temperature measuring means, one in each zone, a scanning means having a plurality of inputs connected to said temperature measuring means operable to sequentially pass signals therefrom indicative of whether each temperature measuring means is calling for heating or cooling, the particular temperature measuring means located in priority areas being connected to more than one of said plurality of inputs; summing means connected to said scanning means operable to produce an output signal indicative of the algebraic sum of the number of inputs connected to temperature measuring means calling for one of the states of heating or cooling; and control means connected to said summing means and said heating and cooling means operable to vary the heating and cooling means in response to the sum from said summing means.
Claim 3
Dependent Claim
21 words
The control system of claim 1 in which said scanning means comprises a multiplexing circuit sequentially advanced by electronic clock means.
Claim 4
Dependent Claim
61 words
The control system of claim 2 in which said summing means comprises a first binary up counter, and a decoder having a plurality of outputs, a portion of said outputs representing a call for more cooling being connected to said control means and a different portion of said outputs representing a call for more heating being connected to said control means.
Claim 5
Dependent Claim
26 words
The control system of claim 3 in which said electronic clock means comprises a second binary up counter connected to a variable period output electronic pulser.
Claim 6
Dependent Claim
61 words
The control system of claim 4 including an AND gate connected to all the outputs of said second binary up counter and said pulser operable to trigger a one shot circuit after each full scan of the scanner, said one shot connected to clear the accumulated count on said first binary up counter and read out the outputs from said decoder.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |