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. 14, 1976
Filed:
Jan. 29, 1975
Applicant:
Inventors:
Takefumi Sato, Tenri, JA;
Tatuo Yokoyama, Tenri, JA;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ; B60T / ;
U.S. Cl.
CPC ...
340256 ; 303 92 ; 340 / ;
Abstract
In an alarm system wherein a fault detection unit and a fault indication unit are spaced away from each other, long wires for detection signal transmission and for power supply, etc., are necessary. A fault indication driving circuit is provided within or adjacent to the fault indication unit, the bias voltage of the fault indication driving circuit being determined with the use of the detection signal transmission wire and the power supply wire in such a manner that the fault indication is enabled when one of the long wires is accidentally broken or placed in poor connection condition.