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:
Sep. 03, 1985
Filed:
Apr. 18, 1983
Rolf Strothmann, Innerkip, CA;
Rolf Dohmer, Kitchener, CA;
Unitron Industries Ltd., Kitchener, CA;
Abstract
A connecting cord has a plug at each end. Either such plug may be plugged into the receptacle of a hearing aid and the other plug may be plugged into an external microphone. The contacts of each plug are connected in a different circuit configuration to the conductors of the cord so that when one plug is plugged into the receptacle, the internal hearing aid microphone is shorted out, and when the other plug is plugged into the receptacle, both microphones operate in parallel. The plug contacts are formed of printed circuit board and each plug has a rocker with a hooked top which engages a slot in the receptacle to prevent the inadvertent movement of the plug out of the receptacle. Other plug internal circuit configurations allow connection of other signalling systems to the hearing aid.