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:
Dec. 09, 1986
Filed:
Mar. 26, 1985
Applicant:
Inventor:
David L Neasham, Penkridge, GB;
Assignee:
Thorn Emi Automation Limited, Rugeley, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
320 48 ; 320 32 ;
Abstract
In some industrial situations a battery charger is used to supply d.c. power to an electrical equipment, and a battery is connected across the output terminals of the charger so that a 'back-up' supply is available if the charger should fail. An indicating circuit is used to generate a warning if an open circuit condition arises in the battery charging circuit. The indicating circuit operates by monitoring the output impedance of the battery charger. If the output impedance exceeds a threshold value the indicating circuit generates a warning signal.