Multi-contact push-button switch having plural prestressed conta

Details Multi-contact push-button switch having plural prestressed conta Multi-contact push-button switch having plural prestressed conta

1975-04-18

1976-12-07

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200 1R, 200 67DB, 200159A, 200159B, 200275, H01H 1370, H01H 106, H01H 500

Patent

active

039964299

ABSTRACT:
A push-button switch has a spring contact plate and a circuit board in superposed position. The spring contact plate has one or more switch positions, each switch position comprising a prestressed domed portion surrounded by a common flat sheet portion. The spring contacts of each prestressed dome portion selectively engage peripheral contact areas on the circuit board followed by the central contact portion engaging subsequently with a further fixed central contact area on the circuit board. Accordingly, plural inputs of electronic logic circuits may be preselected prior to simultaneous activation upon subsequent closure of the central contacts at a given switch position. Release of the push button enables the domed portion to snap back to the stable position.

REFERENCES:
patent: 3133170 (1964-05-01), Nanninga
patent: 3600528 (1971-08-01), Leposavic
patent: 3699294 (1972-10-01), Sudduth
patent: 3742157 (1973-06-01), Leposavic
patent: 3761944 (1973-09-01), Shimojo
patent: 3796843 (1974-03-01), Durkee et al.
patent: 3800104 (1974-03-01), Lien et al.
patent: 3826882 (1974-07-01), Giolitti et al.
patent: 3870840 (1975-03-01), Rivetta et al.
patent: 3898421 (1975-08-01), Suzumura
patent: 3941953 (1976-03-01), Misson et al.
patent: 3941964 (1976-03-01), Yoder

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