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. 10, 1997
Filed:
Jul. 15, 1994
Applicant:
Inventor:
Jerry F Adams, Brockport, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 20 ; 363 56 ; 363131 ;
Abstract
An interlock switch (14) is provided between a housekeeping power supply (12) and a pulse width modulator (16). The pulse width modulator (16) pulses a field effect transistor (18) to generate alternating current (AC) to be passed by a transformer (26). The AC is converted to direct current (DC) by a converter 34 to provide an output voltage. If the switch (14) is opened, power to the modulator (16) and transistor (26) is terminated. No AC power is transmitted. Thus, since the transformer (26) only transfers AC, no voltage is generated at the output of the system.