US3785432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control circuit with time delay of main and feedback signals
Assignee: Honeywell Inc
•
Filing: 1972-10-02
•
Granted: 1974-01-15
•
Expires: 1992-10-02
Abstract
Abstract An electronic control circuit particularly adaptable for use in a heating and/or cooling control system wherein signals are received from a plurality of zones to control stages of temperature conditioning apparatus. The control circuit has a first time delay circuit for receiving a signal indicative of the need of the energization of temperature conditioning apparatus and a second time delay circuit connected to the output of the first time delay circuit for providing a signal to a control apparatus adapted to control the temperature conditioning apparatus. A first feedback circuit is connected to the input of the second time delay circuit for providing a feedback signal indicative of the operation of the control apparatus and a second feedback circuit provides a feedback signal to the second time delay circuit indicative of the operation of the temperature conditioning apparatus.
Inventors
- 👤 R Porter
- 👤 J Tobias
- 👤 J Kabat
- 👤 J Magnussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:21
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1932; G05D23/1934; F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; G05D23/1906; G05D23/1912; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
260 words
In a zone control system having a zone damper motor for each zone for controlling the supply of hot and cold air to the zOne in response to a zone thermostat connected thereto by a control circuit having heating and cooling control output circuits with signals indicative of the temperature of the air needed for that zone for heating and cooling and having a central processor to which the output circuits are connected so the zone of the highest demand controls heating and cooling apparatus furnishing the supply of hot and cold air, the improvement comprising: a control circuit in the central processor comprising an input circuit selectively connected to one of said output circuits for receiving a signal indicative of the temperature conditioning load of the zone having the greatest temperature conditioning load, a first time delay circuit connected to said input circuit to receive said input signal for delaying any changes in said input signal by a first predetermined amount, a second time delay circuit connected to receive an output of said first time delay circuit, control means adapted to control temperature conditioning apparatus in response to an output of said second time delay circuit, a first feedback signal circuit from said control means for providing a feedback signal indicative of the operation of said control means, a second feedback signal circuit adapted to respond to a condition indicative of the operation of the temperature conditioning apparatus for providing a feedback signal, and circuit means connecting said first and second feedback signal to said second time delay circuit.
Claim 2
Dependent Claim
260 words
In a zone control system having a zone damper motor for each zone for controlling the supply of hot and cold air to the zOne in response to a zone thermostat connected thereto by a control circuit having heating and cooling control output circuits with signals indicative of the temperature of the air needed for that zone for heating and cooling and having a central processor to which the output circuits are connected so the zone of the highest demand controls heating and cooling apparatus furnishing the supply of hot and cold air, the improvement comprising: a control circuit in the central processor comprising an input circuit selectively connected to one of said output circuits for receiving a signal indicative of the temperature conditioning load of the zone having the greatest temperature conditioning load, a first time delay circuit connected to said input circuit to receive said input signal for delaying any changes in said input signal by a first predetermined amount, a second time delay circuit connected to receive an output of said first time delay circuit, control means adapted to control temperature conditioning apparatus in response to an output of said second time delay circuit, a first feedback signal circuit from said control means for providing a feedback signal indicative of the operation of said control means, a second feedback signal circuit adapted to respond to a condition indicative of the operation of the temperature conditioning apparatus for providing a feedback signal, and circuit means connecting said first and second feedback signal to said second time delay circuit.
Claim 3
Dependent Claim
179 words
In a control circuit adapted for receiving a main signal indicative of the need of operation of temperature conditioning apparatus and adapted to control the temperature conditioning apparatus, comprising: first circuit means adapted to receive the main signal, said circuit means providing a predetermined time delay between the effect of changes of the signal and changes in a first output signal of said circuit means, second circuit means connected to receive said first output signal, said second circuit means providing a predetermined time delay between the effects of changes of said first output signal and changes in a second output signal of said second circuit means, control circuit means adapted to control temperature conditioning apparatus, said control circuit being connected to respond to said second output signal, first feedback circuit means providing a first feedback signal to said second circuit means indicative of the operation of said control circuit means, and second feedback circuit means adapted to provide a second feedback signal to said second circuit means indicative of the effect of the operation of the temperature conditioning apparatus.
Claim 4
Dependent Claim
179 words
In a control circuit adapted for receiving a main signal indicative of the need of operation of temperature conditioning apparatus and adapted to control the temperature conditioning apparatus, comprising: first circuit means adapted to receive the main signal, said circuit means providing a predetermined time delay between the effect of changes of the signal and changes in a first output signal of said circuit means, second circuit means connected to receive said first output signal, said second circuit means providing a predetermined time delay between the effects of changes of said first output signal and changes in a second output signal of said second circuit means, control circuit means adapted to control temperature conditioning apparatus, said control circuit being connected to respond to said second output signal, first feedback circuit means providing a first feedback signal to said second circuit means indicative of the operation of said control circuit means, and second feedback circuit means adapted to provide a second feedback signal to said second circuit means indicative of the effect of the operation of the temperature conditioning apparatus.
Claim 5
Dependent Claim
38 words
The invention of claim 1 wherein said second time delay circuit comprises a summing circuit means for receiving said input signal from said first time delay circuit, and said feedback signals from said first and second feedback circuits.
Claim 6
Dependent Claim
45 words
The invention of claim 1 wherein said control means comprises a staging control device for controlling at least two stages of temperature conditioning apparatus in sequence, said first feedback signal circuit means providing a feedback signal upon the operation of each of said two stages.
Claim 7
Dependent Claim
53 words
The invention of claim 2 wherein, said first feedback signal is a negative signal for counteracting said main signal to reduce its effect temporarily on said control circuit means, and said second feedback signal is a negative signal for counteracting said main signal to reduce its effect temporarily on said control circuit means.
Claim 8
Dependent Claim
54 words
The invention of claim 5 wherein, said control circuit is a stage control apparatus adapted for controlling at least two stages of temperature conditioning apparatus in sequence, said first feedback signal is made up of several separate signals each brought about by the operation of one of said stages of said stage control apparatus.
Claim 9
Dependent Claim
47 words
The invention of claim 6 wherein said sEcond feedback signal circuit means comprises, circuit means adapted to respond to an output signal of a temperature responsive device responding to the temperature of air in a duct as the temperature changes upon the operation the temperature conditioning apparatus.
References Cited (Backward Citations)
US3197711A
Cited
US3567115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |