Electrically illuminated wrist watch dial

Details Electrically illuminated wrist watch dial Electrically illuminated wrist watch dial

1980-09-26

1982-05-18

Reynolds, B. A.

Horology: time measuring systems or devices

Chronological

With auxiliary illumination for display

368227, 368204, 362 29, 362288, 362306, G04B 1930

Patent

active

043308775

ABSTRACT:
The dial face of a battery-operated electric wrist watch is illuminated momentarily by manual pressure on a switch connecting a miniature light bulb, mounted between the crystal (lens) and the dial face, to the battery of the watch.

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patent: 3609960 (1971-10-01), Huther
patent: 3747322 (1973-07-01), Eckenrode
patent: 3754130 (1973-08-01), Stone et al.
patent: 3788061 (1974-01-01), Tornquist et al.
patent: 3855784 (1974-12-01), Foellner
patent: 3864905 (1975-02-01), Richardson
patent: 3913312 (1975-10-01), Numabe

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