Combined crown/pushbutton for illuminated analog watch

Details Combined crown/pushbutton for illuminated analog watch Combined crown/pushbutton for illuminated analog watch

1995-02-13

1997-07-01

Roskoski, Bernard

Horology: time measuring systems or devices

Crown or stem details

Switch or detent

368190, G04C 300

Patent

active

056445539

ABSTRACT:
A combination crown and pushbutton for an illuminated analog watch having a manual actuator on the setting stem external to the watchcase for pulling out the stem and manually rotating it to set the hands. The watch has an electroluminescent dial which lights up when a switch is closed. An axially elongated detent recess in the stem allows the stem to move inward when the actuator is pushed. A spring switching arm maintains the actuator in the normal run position and closes a switch when the actuator is pushed. Thus a separate pushbutton is not needed.

REFERENCES:
patent: 3526088 (1970-09-01), Meitinger
patent: 3832843 (1974-09-01), Wuthrich
patent: 4023002 (1977-05-01), Wuthrich et al.
patent: 4031341 (1977-06-01), Wuthrich et al.
patent: 4126992 (1978-11-01), Yasuda
patent: 4182111 (1980-01-01), Tamaru
patent: 4415277 (1983-11-01), Ganter
patent: 4536095 (1985-08-01), Wuthrich
patent: 4794576 (1988-12-01), Schwartz et al.
patent: 5305291 (1994-04-01), Kamens et al.

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