Push-button dial assembly for telephones

Details Push-button dial assembly for telephones Push-button dial assembly for telephones

1979-04-09

1981-09-22

Brigance, Gerald L.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 5R, 200 5A, 200 6A, 340365R, H04M 150, H04M 123

Patent

active

042912016

ABSTRACT:
A push-button assembly in which a cluster of push-buttons arranged in a circle or in a rectangular matrix, when depressed, engage a common plate positioned beneath the push-buttons. The plate is pivotally supported at its center by a spring which urges the plate towards the push-buttons. When any of the push-buttons is depressed it engages the plate at a point spaced from the central pivot. This causes the plate to tilt about its outer periphery, compressing the spring and actuating a common switch.

REFERENCES:
patent: 2896034 (1959-07-01), Nolden et al.
patent: 2994531 (1961-08-01), Eberwein
patent: 3080457 (1963-03-01), Jansson et al.
patent: 3207862 (1965-09-01), Robbins
patent: 3210484 (1965-10-01), Dorsey
patent: 3506795 (1970-04-01), Schmidt
patent: 4146767 (1979-03-01), Murata

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