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:
May. 31, 1977
Filed:
Sep. 17, 1975
Dieter R Lohrmann, Lanham, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A battery charge indicator for determining the remaining useful life of a battery which accurately measures the battery voltage in an operational environment and provides an indicator of relative levels of the operational condition of the battery and a proportional measurement of its expected life utility. The device employs solid state circuit elements for compactness, which include a Zener diode as a reference voltage element coupled to a voltage divider network and a plurality of amplifiers connected to an array of separate indicators such as light emitting diodes, which indicate particular battery voltage. A thermistor network may be included to provide compensation for temperature variations of the operational environment of the battery and load.