Switching assembly in combination wristwatch and calculator

Details Switching assembly in combination wristwatch and calculator Switching assembly in combination wristwatch and calculator

1976-04-15

1977-10-25

Smith, Jerry

Boots, shoes, and leggings

58 50R, 58152R, 307116, 340365C, 364709, G06F 1502, G06F 738, G04B 4700, H01H 3500

Patent

active

040557553

ABSTRACT:
In a combination wristwatch and calculator, a key input means for information entry employs a touch sensitive electronic switching circuitry comprising a C-MOS inverter. One electrode for the touch sensitive electronic switching circuitry is provided on the front panel of the combination wristwatch and calculator, whereas another electrode for the touch sensitive electronic switching circuitry is positioned on the rear surface of the combination wristwatch and calculator. The present key input means is equally applicable to a miniature electronic calculator.

REFERENCES:
patent: 3737670 (1973-06-01), Larson
patent: 3766404 (1973-10-01), Larson et al.
patent: 3803834 (1974-04-01), Reese
patent: 3877029 (1975-04-01), Larson et al.
patent: 3928960 (1975-12-01), Reese
patent: 3958239 (1976-05-01), Green
patent: 3973255 (1976-08-01), Freeman

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