Keypad including membrane with replaceable key elements

Details Keypad including membrane with replaceable key elements Keypad including membrane with replaceable key elements

1993-04-23

1994-11-22

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

2003021, 200309, 200314, 200345, H01H 1370

Patent

active

053671333

ABSTRACT:
A keypad (10) comprises a membrane having a plurality of switch actuating portions (41). The keypad (10) further comprises key portions (44) corresponding to said switch actuating portions (41) and located on an opposite side of the membrane to said switch actuating portions (41) and a plurality of switch elements (18) located beneath said switch actuating portions (41) of the membrane. The membrane extends across the keypad (10) and provides a water resistant barrier between the switch elements (18) and the key portions (44) of the membrane. Removable buttons (40) are provided for the keypad (10) and are attached to the key portions (44) of the membrane, whereby pressing of the buttons (40) causes flexing of the membrane and actuation of the switch elements (18) by the switch actuating portion of the membrane.

REFERENCES:
patent: 4421966 (1983-12-01), Pounds
patent: 4489227 (1984-12-01), Lamarche
patent: 4518833 (1985-05-01), Watkins
patent: 4536625 (1985-08-01), Bebie
patent: 4571466 (1986-02-01), Iida
patent: 4636593 (1987-01-01), Novak et al.
patent: 4710597 (1987-12-01), Loheac
patent: 4764770 (1988-08-01), Church
patent: 5081329 (1992-01-01), Mitusinski et al.

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