Keyswitch-integrated pointing assembly

Details Keyswitch-integrated pointing assembly Keyswitch-integrated pointing assembly

1990-07-24

1993-07-27

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340711, 338 99, 200 5R, 200511, G06F 314, H01C 1010, H01H 900, H01H 110

Patent

active

052313867

ABSTRACT:
A keyswitch-integrated pointing assembly in which a plurality of substantially planar force sensing elements are disposed on a planar surface adjacent a keyswitch on a keyboard. The keyswitch includes a plunger which extends downwardly from a key cap for actuating a switch at the lower end of vertical key cap travel. The key cap engages an indexing surface when fully depressed which transmits force applied to the key cap to the force sensing elements. The force sensing elements are sandwiched between a pair of opposing plates thereby biasing the elements into a substantially linear operating region when no force is applied to the key cap.

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J. D. Rutledge, T. Selker, Force-to-Motion Functions for Pointing, Human-Computer Interaction--Interact '90, pp. 701-706, IBM T. J. Watson Research Center, Yorktown, N.W., 1990.

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