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:
Oct. 27, 1987
Filed:
Sep. 13, 1985
Applicant:
Inventor:
Frank T Ferguson, Oklahoma City, OK (US);
Assignee:
Control Technology, Inc., Oklahoma City, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
307 64 ; 307 66 ; 307 87 ;
Abstract
An alternating current power source, which is to provide an auxiliary alternating power signal output to a load after switchover from a primary power signal, includes a phase switching circuit which causes the auxiliary power signal to immediately switch phases when a phase imbalance is detected between the primary power signal which existed immediately prior to switchover and the reserve power signal which exists immediately after switchover. In a preferred embodiment the circuit includes a diode and capacitor serially connected between a shutdown output and a synchronizing input of a pulse width modulator integrated circuit.