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:
Mar. 06, 1979
Filed:
Jan. 17, 1978
Applicant:
Inventors:
Fredy E Graf, San Diego, CA (US);
Michael S Krystek, Spring Valley, CA (US);
Assignee:
General Atomic Company, San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; H02J / ; H02H / ;
U.S. Cl.
CPC ...
307 66 ; 307 71 ; 307130 ; 320 16 ; 361 92 ; 364900 ;
Abstract
A battery backup system provides DC power to a data processing system in the event of an AC power failure. A preferred embodiment supplies DC power from a plurality of series-connected batteries at a voltage level sufficient to operate a data processor. After a time delay, the batteries are connected in parallel to provide DC power at a lower voltage level sufficient to maintain information stored in a memory.