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:
Aug. 31, 1982
Filed:
Aug. 25, 1980
Applicant:
Inventor:
Mitsuru Ueda, Aichi, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ; G10K / ;
U.S. Cl.
CPC ...
340388 ; 340404 ;
Abstract
In an electric alarm device, a disk-shape housing has an opening on one surface and a substantially flat bottom surface on the other surface. A diaphragm is fixed to the periphery of the housing to close the opening of the housing. An armature is mounted within the housing and coupled to the diaphragm to move with the diaphragm. A solenoid coil unit is fixed to the housing within the housing to generate magnetic fluxes for attracting the armature. A switch is mounted within the housing to detect the movement of the diaphragm to conduct and break the current to the solenoid coil unit.