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. 14, 1977
Filed:
Jan. 09, 1976
Edwin Howe Halsted, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A double pole-double throw dual speed control switch for a single phase AC motor having high speed main and starting windings and a low speed main winding is operable to a high speed operating mode position in which the high speed starting and running circuit including the high speed main and starting windings in parallel is completed and to a low speed operating mode position in which the low speed starting circuit including the low speed main winding and the parallel combination of the high speed main and starting windings in series is completed. A potential sensitive switching device responsive to a potential of a predetermined magnitude across the low speed main winding is effective to interrupt the low speed operating mode starting circuit and to establish a low speed motor running circuit for the low speed main winding.