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:
May. 08, 1990
Filed:
Feb. 27, 1989
Applicant:
Inventor:
Ciro Guajardo, Harbor City, CA (US);
Assignee:
Teledyne Industries, Inc., Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361101 ; 261 86 ; 261 91 ; 261 98 ;
Abstract
In a solid state relay circuit including a power semiconductor for switching power to a load circuit and having circuitry for disabling the power semiconductor to protect against current overload or short circuits, such disabling means including a silicon controlled rectifier for short circuiting the input to the power semiconductor, apparatus for sensing the presence of transient voltages in the load circuit, and apparatus for disabling any short circuit caused by the silicon controlled rectifier due to such voltage transients.