Wristwatch with a switching crown

Details Wristwatch with a switching crown Wristwatch with a switching crown

1990-01-02

1991-03-19

Roskoski, Bernard

Horology: time measuring systems or devices

Crown or stem details

Switch or detent

368320, G04B 2900

Patent

active

050016873

ABSTRACT:
A wristwatch having a switching crown to effectuate an electrical switch function. The switching crown comprises a crown element constructed from electrically conductive material. The crown is in contact with a first conductor element connected to one side of a battery. A second conductor element extends in a portion of the crown and electrically isolated therefrom. A peripheral inner end portion of the crown is disposed closely spaced to the second conductor element. The peripheral inner end portion is placed in contact with the second conductor element by maintaining a side pressure on the crown element to effectuate a switch closure.

REFERENCES:
patent: 2245302 (1941-06-01), Schmitz
patent: 3975896 (1976-08-01), Kasama
patent: 4268913 (1981-03-01), Nakagiri et al.
patent: 4400095 (1983-08-01), Namyslo
patent: 4423966 (1984-01-01), Ogihara et al.
patent: 4435796 (1984-03-01), Saito et al.
patent: 4727526 (1988-02-01), Tajama et al.

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