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:
Aug. 07, 1979
Filed:
Feb. 09, 1978
Fredrick T Cogan, London, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
A telephone handset is formed from two elongate hollow concave parts, joined at their peripheries, with a circular recess at one end of the lower part. A transmitter assembly is positioned in the recess and comprises a transmitter, a cup-shaped member positioned on the back of the transmitter and a resilient tubular member surrounding the transmitter and at least the lower or front part of the cup-shaped member. The tubular member has a radially inward projecting rim at its front or lower end extending over the front of the transmitter and a similar rim at its rear end engaging over a projection on the cup-shaped member. The resilient tubular member retains the transmitter and cup-shaped member together, and acoustically seals them together and also acoustically seals the front of the transmitter to the base of the recess.