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. 03, 1992
Filed:
Aug. 28, 1990
Applicant:
Inventor:
Joseph M McAndrews, Freeport, NY (US);
Assignee:
Nynex Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; H02J / ;
U.S. Cl.
CPC ...
307 66 ; 307 46 ; 379413 ;
Abstract
A back-up battery system for a switching equipment load in a telephone central office wherein the back-up battery system includes one or more rechargeable batteries having cells floated at a given float voltage and of a number such that when the batteries are switched in circuit across the load, the voltage of the batteries exceeds a minimum load voltage for a preselected period, and further being of a number such that the float voltage of the batteries exceeds a maximum load voltage.