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:
Jul. 27, 1976
Filed:
Jul. 22, 1975
John L Dohanic, Jr, Girard, PA (US);
Gerald J Cornell, Lake City, PA (US);
Louis Marx & Co., Inc., Glen Dale, WV (US);
Abstract
A D.C. potential controller is provided for controlling the magnitude and polarity of a D.C. potential applied to a D.C. drive motor. The controller includes a supply device for producing a potential having a predetermined polarity and magnitude and including a first fixed terminal referenced to said predetermined polarity and potential and a second fixed terminal referenced to a reference potential. A regulating element is displaceable between first and second polarity selecting positions, and is further coordinately displaceable from either first or second polarity selecting positions through a third position. The regulating element also includes first and second moving contacts disposed thereon in spaced apart relationship for contact with the first and second terminals, first and second fixed output current terminals are respectively disposed in contact with the first and second moving contacts when same are displaced through the third position, the first output current terminal including circuitry for linearly varying the output current in the first output current terminal in response to the aforesaid coordinate displacement of the regulating member.