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:
Nov. 23, 1993
Filed:
Sep. 11, 1992
Kiyokatsu Satoh, Saitama, JP;
Mitsuharu Morishita, Hyogo, JP;
Mitsubshi Denki K.K., Tokyo, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
An apparatus for controlling an AC generator in a vehicle, the AC generator including an exciting coil and driven by an engine to generate an AC output which is rectified and fed to a battery, includes a pilot-lamp switching transistor device constituted by a Darlington-connection of transistors, the pilot-lamp switching transistor device having a base and a collector for turning a pilot lamp on/off, the pilot lamp being fed with a current from the battery through a key switch, a resistor connected between the base and the collector of the pilot-lamp switching transistor, an initial exciting transistor for controlling a current for the initial excitation of the exciting coil by the battery, a voltage detection circuit for detecting a voltage of the battery, and a voltage detection circuit switching transistor for controlling a switching operation of the voltage detection circuit. In the control apparatus, at least one of the initial exciting transistor and the voltage detection circuit switching transistor is driven by a collector potential of the pilot-lamp switching transistor.