Northern Telecom Limited

Fredrick T Cogan

Beverley W Gumb

Gerd Kuhfus

A mounting for a transducer in a telephone handset comprises a flexible tubular gasket which is attached to the front housing by projections at a front end which fit under ribs extending from the side walls of the housing. The transducer clips into the gasket, being held in place by an inwardly projecting rim at a rear end of the gasket. The handset has a front and back housing forming an elongate hollow enclosure with two tranducers, a transmitter at one end and a receiver at the other. Either or both transducers may be attached by the mounting, the transmitter being particularly suitable. At least one buttress is provided for longitudinal location of the gasket. A flexible insert on the back of the back housing covers fastening screws. A cord inlet at the transmitter end provides alternate anchorage means for a hand wired line cord on support means for a modular jack.

Telephone handset transducer mounting

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.

Telephone handset with transmitter having a one piece gasket for sealing

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 having a receiver therein. A cover member fits on the reciver and is rotatable in the recess, and interengaging formations on the cover member and the interior surface of the recess which, on rotation of the cover member, engage and lock the cover member and receiver in the recess.

Telephone handset with rotatably locking receiver

A multi-outlet adaptor for plug-in telephones is in the form of a hollow box-like member in the front of which are at least two apertures with a jack aligned with and behind each aperture. A plug can be inserted through each aperture. On the rear of the box-like member is an integral plug for insertion in the normal telephone outlet or jack. The jacks in the adaptor are wired in parallel to the plug on the rear. A latch can be provided on the plug and the apertures can be profiled to provide latch engaging formations.

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London, Canada

Fredrick T Cogan