Furnace having multiple speed motor and accessory control system
Abstract
Abstract A HEATING AND COOLING SYSTEM INCLUDING A FURNANCE HAVING A CONTROL MODULE COMPRISING A PREWIRED PRINTED CIRCUIT BOARD HAVING A PAIR OF LINE VOLTAGE CONDUCTORS CONNECTED TO THE PRIMARY WINDING OF A POWER TRANSFORMER AND A PAIR OF LOW VOLTAGE CONDUCTORS CONNECTED TO THE SECONDARY WINDING OF A POWER TRANSFORMER. TERMINAL MEANS ARE PROVIDED FOR CONNECTING A PLUG-IN FAN RELAY AND A THERMOSTAT IN THE LOW VOLTAGE CIRCUIT. ADDITIONAL TERMINAL MEANS ARE PROVIDED FOR CONNECTING A FAN MOTOR AND A HUMIDIFIER AND HUMIDIFIER RELAY TO THE LINE VOLTAGE CIRCUIT. TERMINAL MEANS ARE ALSO PROVIDED IN CONJUNCTION WITH A DOUBLE-POLE, DOUBLE-THROW FAN MOTOR RELAY SWITCH FOR CONNECTING AN AIR CLEANER ACCESSORY UNIT TO THE CIRCUIT. THE CIRCUIT IS ARRANGED TO PROVIDE THE DESIRED OPTIMUM PROGRAMMING OF CONTROL FUNCTIONS WITH AN COMBINATION OF ACCESSORIES.
Inventors
- 👤 William F Raleigh
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |