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. 07, 1976
Filed:
Nov. 26, 1975
Ernest A Dahl, Ventura, CA (US);
Other;
Abstract
A battery electrolyte level indicator for indicating when the electrolyte of a wet cell battery has fallen below a minimum acceptable level. A probe pair is disposed in each cell of the battery to a depth corresponding to the minimum acceptable level of the electrolyte contained therein. The probe pairs are connected in series with a light emitting diode connected between the probe pairs in the end battery cells. The series connected probe pairs and the light emitting diode form a complete circuit loop. Current limiting resistors bridge each probe pair such that when the electrolyte level in any one cell is below the minimum acceptable level, the current limiting resistor replaces the probe pair in the complete circuit loop, thus turning off the light emitting diode.