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:
Jul. 09, 1985
Filed:
Apr. 05, 1983
Masahiro Inaniwa, Katsuta, JP;
Yoichi Ogawa, Katsuta, JP;
Hitachi Koki Company, Limited, Tokyo, JP;
Abstract
A battery charger comprises a rectifier connected to a source of alternating voltage for generating a rectified sinusoidal halfwave voltage and a thyristor connected in a first circuit between the rectifier and a rechargeable battery for applying the sinusoidal halfwave voltage thereto. An RC triggering network is provided in a second circuit between the battery and the gate of the thyristor for triggering the same into conduction to apply the sinusoidal voltage to the battery when the instantaneous value of the voltage is higher than the voltage of the battery. A temperature responsive switch is provided for disconnecting the second circuit when the battery is heated to a temperature higher than a predetermined value. Further provided is a transistor responsive to the temperature responsive switch for establishing a short-circuit path to the gate of the thyristor.