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. 11, 1978
Filed:
Apr. 25, 1977
Applicant:
Inventors:
Terrance D Nelson, Milwaukee, WI (US);
Bruce G Klippel, Milwaukee, WI (US);
Assignee:
Allen-Bradley Company, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02D / ;
U.S. Cl.
CPC ...
318227 ; 318230 ; 318398 ; 318416 ;
Abstract
Both solid state static control devices and electromagnetically operated contactors are employed in an a-c motor starter. The solid state control devices are operated by an acceleration control circuit to accelerate the motor during start-up. When synchronous speed is achieved, a run contactor is energized and its contacts are closed to conduct motor current. Under steady state conditions, therefore, the solid state control devices are bypassed.