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. 27, 1990
Filed:
Feb. 22, 1990
Joseph C Kadlubowski, Willowbrook, IL (US);
Harper-Wyman Company, Lisle, IL (US);
Abstract
An integral infinite switch is provided for controlling a first coil and a second coil of a radiant heating element. The integral infinite switch includes a first switch assembly for opening and closing an electrical path between a first AC electrical line L1 and a first end of the first coil. The first AC electrical line L1 is directly connected to a first end of the second coil. The integral infinite switch includes a second switch assembly for opening and closing an electrical path between a second AC electrical line L2 and a second opposite end of both the first coil and the second coil. A spindle is rotatable between an OFF position, a first range of ON positions for the second coil and a second range of ON positions for the first coil and the second coil. A cam member is mounted on the spindle for rotation with the spindle. The cam member includes a first cam surface adapted for operative engagement with the first switch assembly and a second cam surface adapted for operative engagement with the second switch assembly.