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:
Nov. 13, 1984
Filed:
Nov. 24, 1981
Applicant:
Inventors:
Seizi Todaka, Tokyo, JP;
Teruaki Tanaka, Yokohama, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
An alarming apparatus having a sound volume level setting circuit for setting the volume level of the sound produced from a sound generating circuit to one of a plurality of different sound volume levels. A modulating circuit varies the frequency, duty ratio (pulse duration) or amplitude of the signal transmitted from the oscillating circuit. The sound generating circuit produces sound having one of a plurality of different volume levels according to the signal transmitted from said modulating circuit.