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. 08, 1992
Filed:
Oct. 04, 1991
Clay A Stocklin, Redmond, WA (US);
David M Rollins, Monroe, WA (US);
William P Pierson, Everett, WA (US);
Leviton Manufacturing Co., Inc., Little Neck, NY (US);
Abstract
A handheld, battery-powered telecommunications test instrument with a talk battery circuit capable of supplying power for up to four telephone sets, which may be connected either in series or in parallel. The instrument determines the configuration of the telephone sets as having serial connections or parallel connections by sensing the amount of current flowing through the circuit of the invention. In response to the amount of current, a transistor automatically operates to supply power to the telephone sets as either a voltage source or a current source and maximizes power transfer between the telephone sets. The instrument has a low power mode to reduce current drain on the battery that is automatically engaged when the telephone sets are not in use.