Keypad for input of control commands

Details Keypad for input of control commands Keypad for input of control commands

1999-04-22

2000-07-11

Friedhofer, Michael

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200 52, 2003022, H01H 1370

Patent

active

06087600&

ABSTRACT:
This keypad for the input of control commands comprises a membrane keypad, a carrier, a keypad base and a key module. The switching operation, initiated by keys, takes place in a closed unit in the form of a carrier which encloses the keypad base and the membrane keypad. The switching contacts are located within the membrane keypad which is sealed against moisture, whereby the actual performance of the switching command take place within the sealed membrane keypad, switching plungers of the keypad base having only an actuating function. The sealed unit in the form of the carrier considerably eases installation in that the keypad base and the membrane keypad can be pre-installed in the carrier at the factory the key module can be placed over them at the installation site.

REFERENCES:
patent: 4032729 (1977-06-01), Koistinen
patent: 4092527 (1978-05-01), Luecke
patent: 4323740 (1982-04-01), Balash
patent: 4689455 (1987-08-01), Watanabe
patent: 4703160 (1987-10-01), Narishima et al.
patent: 5481074 (1996-01-01), English
patent: 5734136 (1998-03-01), Newcomer et al.

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