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:
Nov. 10, 1987
Filed:
Mar. 12, 1985
Applicant:
Inventor:
Warren G Hafner, Lake Carmel, NY (US);
Assignee:
Pitney Bowes Inc., Stamford, CT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 93 ; 361 87 ; 323279 ; 323268 ;
Abstract
A short circuit protection circuit and associated method is provided, for a device with a first and second power supply. The circuit comprises a pair of switches connected to the respective power supplies, a current sensing element connected to each switch and an output buffer circuit connected to each switch for preventing either power supply from being shorted. The circuitry utilizes advantageously integrated circuit technology. Through the use of the circuitry the power supplies are effectively removed from the output buffer when excessive current is sensed.