Means for attaching auxiliary devices to a membrane switch

Details Means for attaching auxiliary devices to a membrane switch Means for attaching auxiliary devices to a membrane switch

1982-12-13

1983-11-08

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

200312, 200317, H01H 1312, H01H 902

Patent

active

044144520

ABSTRACT:
A membrane switch has a substrate, a flexible membrane and an intervening spacer. Switch contacts are formed on the top surface of the substrate and the underside of the membrane in spaced, facing relation. A hole in the spacer in register with the switch contacts allows the contacts to move together in response to pressure exerted on the membrane. An auxiliary electrical device can be incorporated into the membrane switch through an opening in the membrane which provides access to a current supply circuit which is formed on the top surface of the spacer. The auxiliary device is held in place in electrical contact with the current supply circuit on the spacer. A pair of current supply leads provide electrical power to the current supply circuit. In a preferred embodiment at least one of the current supply leads is formed on the underside of the membrane, in contact with the current supply circuit and also connected to the switch contact on the membrane.

REFERENCES:
patent: 3681723 (1972-08-01), Goll
patent: 4056701 (1977-11-01), Weber
patent: 4352963 (1982-10-01), De Filippis et al.

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