Temperature control system for glass-ceramic cook-top
Abstract
Abstract A TEMPERATURE CONTROL CIRCUIT FOR USE WITH A GLASS-CERAMIC COOK-TOP. THE CONTROL CIRCUIT CONTROLS THE RATE AT WHICH HEAT IS GENERATED BY THE COOK-TOP AND ALSO PREVENTS THE TEMPERATURE OF THE COOK-TOP FROM EXCEEDING A MAXIMUM TEMPRATURE WHICH COULD CAUSE PERMANENT DAMAGE TO THE COOK-TOP, I.E., THE CIRCUIT PROVIDES BOTH INPUT RATE CONTROL AND OVER-TEMPERATURE CONTROL. THE AMOUNT OF HEAT DELIVERED TO THE COOKTOP IS CONTROLLED BY A THERMAL RELAY WHICH IS OPERATED BY ELEMENTS SENSITIVE TO THE TEMPRATURE OF THE COOK-TOP. THE CONTROL CIRCUIT CONSISTS BASICALLY OF AN ELECTRICAL HEATING ELEMENT, A TEMPERATURE SENSING ELEMENT WHICH IS INTEGRATED WITH THE HEATING ELEMENT, A THERMAL RELAY, A SOLID-STATE SWITCHING NETWORK INCLUDING AT LEAST ONE SILICON-CONTROLLED RECTIFIER, AND A REGULATED VOLTAGE SUPPLY NETWORK INCLUDING A ZENER DIODE.
Inventors
- 👤 Garo M Ziver
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 |