Electronic timepiece calculator

Details Electronic timepiece calculator Electronic timepiece calculator

1977-02-10

1978-04-25

Smith, Jerry

Boots, shoes, and leggings

58 50R, 58152R, 340365R, 364709, G06F 748, G06F 1502, G04B 1930

Patent

active

040866548

ABSTRACT:
A calculator particularly suited for use in a small-sized electronic timepiece due to the reduction in size of the keyboard is provided. A small-sized electronic wristwatch having time-keeping circuitry and calculator circuitry includes an input circuit for supplying both data signals representative of numerical information and functional signals representative of operations, decimal-point, clearing and the like to effect processing of the numerical information supplied by the data signals. The numerical input circuit may include one switch the selective actuation of the switch supplying data signals representative of a particular number from the numerical input circuit to the calculator circuitry. Rotary switches and dual purpose switches may be incorporated in the input circuit.

REFERENCES:
patent: 3526892 (1970-09-01), Bartlett et al.
patent: 3715746 (1973-02-01), Hatano
patent: 3803834 (1974-04-01), Reese
patent: 3813533 (1974-05-01), Cone et al.
patent: 3816730 (1974-06-01), Yamamoto et al.
patent: 3852952 (1974-12-01), Vittoz et al.
patent: 3855461 (1974-12-01), Stockwell

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