Northern Telecom Limited

Jacques Marcel Audette

Pak-Jong Chu

A multiple contact switch has a plurality of contact areas spaced across a base member, a plurality of cantilevered spring contact members mounted side-by-side on the base member with contact portions overlying the contact areas, and a rotary cam member extending over the spring contact members to push the contact members down to make contact. A cam surface is provided for each contact member. The cam member is actuated by a remove actuating member and in a line switch for a telephone set, the switch can be mounted on the base of the telephone set with the cam actuated by a flexible cable which in turn is actuated by means depressed when a hand set is replaced.

Multiple contact switch

A pushbutton dial has a cover, a back member and a circuit member assembled in a sandwich formation, the cover supporting a plurality of pushbuttons arranged in columns and rows. Longitudinal and transverse shafts are mounted between, the cover and back member, actuation of a pushbutton rotating a unique pair of longitudinal and transverse shafts. Frequency contacts are mounted on the back surface of the circuit member - usually a printed circuit board - and are actuated by pins passing through the back member and the circuit member one end of each pin in engagement with one set of frequency contacts and the other end of each pin in contact with a lever on one of the longitudinal shafts or one of the transverse shafts. The dial can also be provided with a new form of common switch comprising a series of cantilevered spring contacts mounted side by side and actuated by a cam member in a predetermined sequence.

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Ottawa, Canada

Jacques Marcel Audette