Combination watch-calculator construction

Details Combination watch-calculator construction Combination watch-calculator construction

1976-01-16

1977-12-13

Schaefer, Robert K.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

58 23R, 200 5A, 200159A, G04B 3700, H01H 1370

Patent

active

040621812

ABSTRACT:
Push button switches extending through the case wall of an electronic device, such as a combination watch-calculator engage on a three finger flat spring positioned so that one finger is in continuous electric contact and at least one finger can be pressed by the first button into engagement with an internal electrical contact point to provide manual signaling into the electronics.

REFERENCES:
patent: 2519899 (1950-08-01), Gatnor
patent: 3673357 (1972-06-01), Molchan
patent: 3803834 (1974-04-01), Reese
patent: 3846971 (1974-11-01), Ho et al.
patent: 3858019 (1974-12-01), Muri et al.
patent: 3870840 (1975-03-01), Rivetta et al.
patent: 3974351 (1976-07-01), Solov et al.
patent: 3992870 (1976-11-01), Dekel

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