The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Dec. 13, 1984
Donald L Watrous, Clifton Park, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A temperature-responsive circuit, for operation with a load-control apparatus having a control input for adjusting the magnitude of power applied to a load from a source, uses: a sensor responsive to the temperature in the vicinity of the load-control apparatus; a subcircuit for converting the temperature sensed by the sensor to the magnitude of an electrical parameter; a subcircuit for providing a reference electrical parameter having a magnitude predeterminately selected to equal the magnitude of the electrical parameter at a maximum desired temperature T.sub.0 ; and a subcircuit for providing a control signal to the control input of the load-control apparatus responsive to a comparison between the electrical parameter and the reference electrical parameter, with the control signal having a magnitude respectively insufficient or sufficient to substantially affect the magnitude of power applied to the load if the magnitude of the electrical parameter is respectively less than or greater than the magnitude of the reference parameter. The load power is proportionally reduced if the magnitude of the electrical parameter exceeds the magnitude of the reference parameter. The gain of a comparator-amplifier may be selected to gradually decrease the power applied to the load to a preselected magnitude when a second temperature T.sub.1, greater than the maximum desired temperature T.sub.0 established by the reference parameter, is sensed by the sensor.