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:
Jan. 07, 1992
Filed:
Sep. 18, 1990
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
A heater control system has a phase control circuit coupled between a power supply and a heater to control the phase of current to be supplied to the heater. A short circuit device is connected to short circuit the phase control circuit to allow current from the power supply to flow directly to the heater. A control circuit allows the phase control circuit to operate for a predetermined time after the power supply is turned on, and after the elapse of this predetermined time, shorts the phase control circuit with the short circuit device. In a modification, the phase control circuit may be normally inactive, and be energized to reduce current to the heater when the power supply is being drained by another device.