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, 1980
Filed:
Dec. 23, 1977
Charles E Frailing, Milwaukee, WI (US);
Thomas J Dougherty, Waukesha, WI (US);
Globe-Union, Inc., Milwaukee, WI (US);
Abstract
Apparatus for automatically testing automotive-type, lead acid storage batteries are disclosed in which three separate tests are made and the results thereof compared to predetermined standards in a specified order to maximize the information obtained about the battery. The three tests measure (1) whether the battery meets its cold cranking rating by drawing a predetermined load current therefrom for a predetermined period of time and determining whether the battery terminal voltage is above a specified level at the end of that period, (2) whether the battery terminal voltage is above another specified level at the end of a predetermined period of time following the completion of the first test, and (3) whether the internal resistance is acceptably low. If the battery passes the first test, it is known to be acceptable. If the battery fails the first test and passes the second test, it is known to be unacceptable. If the battery fails the first and second tests, the third test is performed. If the battery then passes the third test, it is known to be acceptable but to require a recharge, whereas if the battery then fails the third test the acceptability of the battery is then not yet determined and it must be recharged and retested.