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. 09, 1996
Filed:
Jun. 19, 1995
Applicant:
Inventor:
Hugh P Campbell, Gardena, CA (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
1231 / ; 123613 ;
Abstract
High voltage switches distribute ignition voltages to spark plugs of an internal combustion engine. A high-voltage switch uses an array of high voltage semiconductor transistors mounted on a single insulated substrate. The high voltage array requires only a single transistor working with a single photo-diode to trigger the array. A light source is mounted in the center of a distributor cap and light from the light source is directed into a light directing rotor. The light directing rotor is designed to reflect light to the photo-diode trigger of each high voltage array. The control circuitry is operated with low voltage.