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. 11, 1986
Filed:
Apr. 18, 1983
Kenneth S Gold, Canoga Park, CA (US);
Other;
Abstract
A battery condition indicator and on-off relay circuit for electric guitars with on-board active electronics, adaptable to many other battery-operated appliances, includes an electronic relay circuit capable of disconnecting one or more batteries, under control of a pair of on-off contacts. A test interval timing circuit delays turnoff by about 10 seconds, during which a test of the battery (or batteries) is performed automatically under normal load by comparison to a precision reference voltage. Good battery condition is indicated by illumination of a light-emitting diode which may be located inside the guitar body, visible thru the opening of a standard audio output jack, which may include the on-off contacts, actuated by insertion or removal of the mating audio output plug. The circuit is particularly power-efficient to minimize battery drain.