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:
Apr. 04, 1989
Filed:
Oct. 01, 1987
Applicant:
Inventor:
John F Schosser, New Fairfield, CT (US);
Assignee:
Duracell Inc., Bethel, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02J / ; H01M / ;
U.S. Cl.
CPC ...
320-2 ; 320 13 ; 429 99 ;
Abstract
This invention pertains to portable battery-pack power supplies for use in devices which must be operated between an upper voltage and a lower voltage limit. The battery pack is comprised of a main power supply and a reserve power supply. The reserve power supply is switched into series connection with the main power supply when said main power supply is discharged to the lower voltage limit. Means are provided for ensuring that only the initial power supply is switched into the circuit after fresh cells are installed in the battery pack.