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:
Sep. 14, 1982
Filed:
Jan. 11, 1980
Edward J Grant, Jr, Chicago, IL (US);
William H Scott, Lombard, IL (US);
John M Stipanuk, Glen Ellyn, IL (US);
Sunbeam Corporation, Chicago, IL (US);
Abstract
A modulator motor and drive unit for use in an electrical device, such as a hand food mixer, wherein the motor is characterized by a low-cost speed control which is capable of providing a large number of discrete motor speeds. The speed control, rather than utilizing a multi-contact switch connected to the field coil by individual taps, has approximately twenty field coil continuous loop taps wound over a bobbin spindle in side-by-side relationship with a wiper contact being slideably movable relative thereto along a path from which the insulation has been removed. Positions of the wiper contact may be determined by replaceable detent elements provided with different detent patterns providing different series of motor speeds whereby the same motor and drive module may be provided within a suitable housing(s) for the economical production of several different models of such electrical devices having differing speed selections. The housing halves are provided with module supporting means and may be permanently secured together by adhesive means. The motor is also characterized by a torsion spring and brush guide arrangement which prevents any contact of the brush springs with the motor commutator.