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. 12, 1989
Filed:
Mar. 03, 1988
Applicant:
Inventors:
Tetsuo Kimura, Tokyo, JP;
Akihiro Kobayashi, Tokyo, JP;
Assignee:
Nittan Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ; G08B / ; G08B / ;
U.S. Cl.
CPC ...
340691 ; 340501 ; 340529 ; 340587 ;
Abstract
An alarm apparatus includes a plurality of sensors connected in parallel with each other between sensor lines extending from a receiver and sounding devices connected between the sensor lines in correspondence to at least one of the sensors. The receiver includes a unit for changing a voltage supply condition of the sensor lines. A control circuit is provided to each audio device so as to selectively control the audio devices when the voltage supply condition is changed, so that a audio device corresponding to an activated sensor, or all of the audio devices, can be arbitrarily controlled to generate audio alarm signals.