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:
Nov. 30, 1976
Filed:
Dec. 11, 1974
Carl L Anderson, Mansfield, OH (US);
The Tappan Company, Mansfield, OH (US);
Abstract
An adjustable cycling switch has one condition for direct application of power to the primary winding of a transformer coupled at its secondary to energize a magnetron that provides microwaves in a microwave oven or the like. The cycling switch also has a second condition for variable adjustment to provide for periodic cyclical energization of the mentioned transformer and magnetron to reduce the effective average microwave power. During such cyclical energization of the transformer and magnetron, power is briefly supplied to the transformer through a surge protection or current limiting resistor at the beginning of each such cycle to reduce the high currents that may otherwise occur in the circuit which could damage switch contacts, the magnetron, and other circuit components; and afterwards full power is supplied and is later cut off.