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:
Apr. 15, 1980
Filed:
Dec. 02, 1976
Applicant:
Inventors:
Shigeo Mori, Tokyo, JP;
Fumikazu Murakami, Tokyo, JP;
Yoshiaki Hara, Tokyo, JP;
Ichiro Horikoshi, Tokyo, JP;
Souya Takahashi, Tokyo, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G04B / ; G04C / ;
U.S. Cl.
CPC ...
368315 ; 368291 ; 368250 ;
Abstract
An alarm watch has an electro-acoustic transducer with a sound releasing cavity containing a vibrating plate for releasing an audible alarm sound. The surface of the vibrating plate exposed to the open air is treated with a water-repellant material having the property to shed or repel water so that when water enters into the sound releasing cavity and wets the vibrating plate, the vibrating plate readily throws off the water thereby obtaining rapid recovery of the alarm sounding function.