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:
Mar. 07, 1989
Filed:
Feb. 11, 1988
Susumu Ito, Aichi, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A load applicability detecting device for induction-heating cooking apparatus includes a heating coil for an heating metallic cooking pans by means of electromagnetic induction, an inverter supplying the heating coil with high frequency currents, a soft starter for gradually decreasing an output frequency of the inverter at the time of the starting of the inverter, an input current detector for detecting the inverter input current at an initial stage of the starting of the inverter to obtain a detection signal, a reference signal generator for generating a reference signal in synchronization with the starting of the inverter, the level of the reference signal being varied with a predetermined time constant, and a comparator for comparing a detection signal generated by the input current detector with the reference signal generated by the reference signal generator to produce a load applicability detection signal in accordance with the difference between the levels of the detection signal and the reference signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile