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. 03, 1991
Filed:
Mar. 28, 1989
Applicant:
Inventors:
Hiromichi Takatsuka, Tokyo, JP;
Tetsuzo Kosaka, Isesaki, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; B60L / ;
U.S. Cl.
CPC ...
219203 ; 219492 ; 219505 ; 219501 ; 323238 ; 323901 ;
Abstract
In a window heater controlling apparatus used in an automobile, a heater control unit including a microcomputer is employed to detect a heater-ON condition and thereafter to control the heating voltage of the alternator in such a manner that the heating voltage is gradually increased up to the rated heating voltage at the beginning of the heater control operation. This heater control operation can be performed by duty ratio control of the switching transistor.