Keypad

Details Keypad Keypad

1997-06-25

1999-08-10

Horabik, Michael

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 22, 345173, 200512, 902 20, H03K 1794

Patent

active

059365579

ABSTRACT:
In a keypad for an ATM or the like, in addition to mechanical keys (14) which when operated press areas (24) on a pressure sensitive layer (22) against a backing plate (32), and thereby close a corresponding normally-open switch (S), additional areas (26) are arranged as normally-closed switches A, with pressure applied by protrusions (36) on the backing plate (32). If the backing plate is removed, the switches A open, and the change is sensed by a monitoring circuit (48).

REFERENCES:
patent: 4543563 (1985-09-01), Wine
patent: 5721666 (1998-02-01), Girard
patent: 5747757 (1998-05-01), Van Zeeland et al.
patent: 5791459 (1998-08-01), Hester et al.

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