Patent US3556203A successfully refreshed from Google Patents.
US3556203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control system
Assignee: YORK-LUXAIRE Inc A CORP OF DE
•
Filing: 1969-03-17
•
Granted: 1971-01-19
•
Expires: 1989-03-17
Abstract
Abstract A heat pump is controlled during air heating operation by a twostage thermostat having its switches biased towards open positions. When the first stage switch closes, it starts the compressor of the heat pump, and adjusts the reversal valve of the heat pump to its heat position so that the indoor coil of the heat pump operates as a condenser coil to heat indoor air. When the second stage switch closes, it turns on a booster air heater, and removes the bias, moving the closing temperature of the second stage switch up to that of the first stage switch. The heat pump is controlled during air cooling operation by a second two-stage thermostat. When the first stage switch of the second thermostat closes, it starts the compressor with one cylinder unloaded. The indoor coil operates as an evaporator coil to cool the indoor air. When the switch of the second stage of the second thermostat closes, it loads the unloaded compressor cylinder, and biases the switches of the second thermostat towards closed positions, moving the closing temperature of the second stage switch of the second thermostat down to that of the first stage switch of the second thermostat.
Inventors
- 👤 William K Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:15
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
229 words
A temperature control system comprising: first means for heating indoor air; second means for increasing the heating of said air; a two-stage, heat control thermostat having a first stage switch, and a second stage switch; first, normally active, bias means for moving said switches towards open positions; means including said first stage switch, when closed, for energizing said first means; means including said second stage switch, when closed, for energizing said second means; means including said first and second stage switches, when closed, for making said bias means inactive, and for maintaining said bias means inactive until said first stage switch opens; third means for cooling said air; fourth means for increasing the cooling of said air; a two-stage, cool control thermostat having a first stage switch, and a second stage switch; second, normally inactive, bias means for moving, when active, said switches of said cool control thermostat towards closed positions; means including said first stage switch of said cool control thermostat, when closed, for energizing said third means; means including said second stage switch of said cool control thermostat, when closed, for energizing said fourth means; and means including said first and second stage switches of said cool control thermostat, when closed, for making said second bias means active, and for maintaining said second bias means active until said first stage switch of said cool control thermostat opens.
Claim 2
Dependent Claim
229 words
A temperature control system comprising: first means for heating indoor air; second means for increasing the heating of said air; a two-stage, heat control thermostat having a first stage switch, and a second stage switch; first, normally active, bias means for moving said switches towards open positions; means including said first stage switch, when closed, for energizing said first means; means including said second stage switch, when closed, for energizing said second means; means including said first and second stage switches, when closed, for making said bias means inactive, and for maintaining said bias means inactive until said first stage switch opens; third means for cooling said air; fourth means for increasing the cooling of said air; a two-stage, cool control thermostat having a first stage switch, and a second stage switch; second, normally inactive, bias means for moving, when active, said switches of said cool control thermostat towards closed positions; means including said first stage switch of said cool control thermostat, when closed, for energizing said third means; means including said second stage switch of said cool control thermostat, when closed, for energizing said fourth means; and means including said first and second stage switches of said cool control thermostat, when closed, for making said second bias means active, and for maintaining said second bias means active until said first stage switch of said cool control thermostat opens.
Claim 3
Dependent Claim
30 words
A system as claimed in claim 1 in which: said first bias means comprises a normally energized heater resistor; and said second bias means comprises a normally deenergized heater resistor.
Claim 4
Dependent Claim
63 words
A system as claimed in claim 2 in which: said system has electric supply lines; said first bias means comprises a normally deenergized relay having a normally closed switch connecting said normally energized resistor to said lines; and said second bias means comprises a normally deenergized relay having a normally open switch for connecting, when closed, said normally deenergized resistor to said lines.
Claim 5
Dependent Claim
290 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an outdoor heat exchange coil; an indoor heat exchange coil; refrigerant expansion means; means, when air heating is required, for routing refrigerant from said compressor through said indoor coil operating as a condenser coil, and said expansion means, into said outdoor coil operating as an evaporator coil, and, when air cooling is required, for routing refrigerant from said compressor through said outdoor coil operating as a condenser coil, and said expansion means, into said indoor coil operating as an evaporator coil; an electric booster heater adjacent to said indoor coil; a two-stage, heat control thermostat having a first stage switch, and a second stage switch; first, normally active, bias means for moving said switches towards open positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said connections; means including said first and second switches, when closed, for connecting said heater to said lines, for making inactive said bias means, and for maintaining said bias means inactive until said first switch opens; electrically operated means for increasing the output of said compressor; a two-stage, cool control thermostat having a first stage switch, and a second stage switch; second, normally inactive, bias means for moving when made active, said switches of said cool control thermostat towards closed positions; means including said first switch, when closed, of said cool control thermostat for connecting said motor to said lines; and means including said switches, when closed, of said cool control thermostat for connecting said electrically operated means to said lines, for making active said second bias means, and for maintaining said second bias means active until said first switch of said cool control thermostat opens.
Claim 6
Dependent Claim
290 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an outdoor heat exchange coil; an indoor heat exchange coil; refrigerant expansion means; means, when air heating is required, for routing refrigerant from said compressor through said indoor coil operating as a condenser coil, and said expansion means, into said outdoor coil operating as an evaporator coil, and, when air cooling is required, for routing refrigerant from said compressor through said outdoor coil operating as a condenser coil, and said expansion means, into said indoor coil operating as an evaporator coil; an electric booster heater adjacent to said indoor coil; a two-stage, heat control thermostat having a first stage switch, and a second stage switch; first, normally active, bias means for moving said switches towards open positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said connections; means including said first and second switches, when closed, for connecting said heater to said lines, for making inactive said bias means, and for maintaining said bias means inactive until said first switch opens; electrically operated means for increasing the output of said compressor; a two-stage, cool control thermostat having a first stage switch, and a second stage switch; second, normally inactive, bias means for moving when made active, said switches of said cool control thermostat towards closed positions; means including said first switch, when closed, of said cool control thermostat for connecting said motor to said lines; and means including said switches, when closed, of said cool control thermostat for connecting said electrically operated means to said lines, for making active said second bias means, and for maintaining said second bias means active until said first switch of said cool control thermostat opens.
Claim 7
Dependent Claim
31 words
A heat pump as claimed in claim 4 in which: said first bias means comprises a normally energized heater resistor; and said second bias means comprises a normally deenergized heater resistor.
Claim 8
Dependent Claim
58 words
A heat pump as claimed in claim 5 in which: said first bias means comprises a normally deenergized relay having a normally closed switch connecting said normally energized resistor to said lines; and said second bias means comprises a normally deenergized relay having a normally open switch for connecting, when closed, said normally deenergized resistor to said lines.
Claim 9
Dependent Claim
153 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an indoor heat exchange coil connected to the discharge side of said compressor so as to operate as a condenser coil to heat indoor air; refrigerant expansion means connected to said coil; an outdoor heat exchange coil connected to said expansion means and to the suction side of said compressor so as to operate as an evaporator coil; an indoor thermostat having a first stage switch, and a second stage switch; normally active bias means for moving said switches towards open positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said lines; an electric booster heater adjacent to said indoor coil; and means including said switches, when closed, for connecting said booster heater to said lines, for making said bias means inactive, and for maintaining said bias means inactive until said first switch opens.
Claim 10
Dependent Claim
153 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an indoor heat exchange coil connected to the discharge side of said compressor so as to operate as a condenser coil to heat indoor air; refrigerant expansion means connected to said coil; an outdoor heat exchange coil connected to said expansion means and to the suction side of said compressor so as to operate as an evaporator coil; an indoor thermostat having a first stage switch, and a second stage switch; normally active bias means for moving said switches towards open positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said lines; an electric booster heater adjacent to said indoor coil; and means including said switches, when closed, for connecting said booster heater to said lines, for making said bias means inactive, and for maintaining said bias means inactive until said first switch opens.
Claim 11
Dependent Claim
19 words
A heat pump as claimed in claim 7 in which: said bias means comprises a normally energized heater resistor.
Claim 12
Dependent Claim
31 words
A heat pump as claimed in claim 8 in which said bias means comprises a normally deenergized relay having a normally closed switch connecting said normally energized resistor to said lines.
Claim 13
Dependent Claim
154 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an outdoor heat exchange coil connected to the discharge side of said compressor so as to operate as a condenser coil; refrigerant expansion means; an indoor heat exchange coil connected to said expansion means and to the suction side of said compressor so as to operate as an evaporator coil to cool indoor air; an indoor thermostat having a first stage switch, and a second stage switch; normally inactive bias means for moving said switches, when made active, towards closed positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said lines; electrically operated means for increasing the output of said compressor; and means including said switches, when closed, for connecting said electrically operated means to said lines, for making active said bias means, and for maintaining said bias means active until said first switch opens.
Claim 14
Dependent Claim
154 words
A heat pump comprising: a refrigerant compressor having an electric driving motor; an outdoor heat exchange coil connected to the discharge side of said compressor so as to operate as a condenser coil; refrigerant expansion means; an indoor heat exchange coil connected to said expansion means and to the suction side of said compressor so as to operate as an evaporator coil to cool indoor air; an indoor thermostat having a first stage switch, and a second stage switch; normally inactive bias means for moving said switches, when made active, towards closed positions; electric supply lines; means including said first switch, when closed, for connecting said motor to said lines; electrically operated means for increasing the output of said compressor; and means including said switches, when closed, for connecting said electrically operated means to said lines, for making active said bias means, and for maintaining said bias means active until said first switch opens.
Claim 15
Dependent Claim
19 words
A heat pump as claimed in claim 10 in which: said bias means comprises a normally deenergized heater resistor.
Claim 16
Dependent Claim
33 words
A heat pump as claimed in claim 11 in which: said bias means comprises a normally deenergized relay having a normally open switch for connecting, when closed, said heater resistor to said lines.
References Cited (Backward Citations)
US2806674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |