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. 22, 1980
Filed:
Apr. 24, 1978
Applicant:
Inventors:
John R Lucas, East Norwalk, CT (US);
Sung C Lee, Bridgeport, CT (US);
Assignee:
Sonetronic Engineering, Inc., Dover, DE (US);
Primary Examiner:
Int. Cl.
CPC ...
G10K / ;
U.S. Cl.
CPC ...
340388 ; 340392 ; 340402 ;
Abstract
An improved electromagnetic audible signal device has a coil and an associated magnetic core. A flexible striker arm carrying a movable magnetic contact is positioned above the core. A multiconvoluted diaphragm is located above the movable contact and the striker arm. The contact periodically impacts against this diaphragm generating an audible signal. The invention includes a spring and screw arrangement for linearly adjusting the gap between the core and striker arm. The same spring also serves to restore vibrational mechanical energy to the system which would normally be lost to the housing.