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:
Jul. 26, 1983
Filed:
Jul. 06, 1981
Applicant:
Inventor:
Douglas J Williams, Huntington Beach, CA (US);
Assignee:
EECO Incorporated, Santa Ana, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
179 / ; 179 / ; 179 / ; 179 / ; 181137 ;
Abstract
An electro-acoustical structure for switching on and supplying sound to an all-acoustical headset upon the insertion of an acoustic-use plug. A piston-valve is depressed against a spring upon the insertion of the plug, opening acoustic ports, and also moving a bifurcated contact attached to the piston to close a circuit with coactive stationary contacts for energizing an electro-acoustic transducer.