Electronic watch having antimagnetic characteristic

Details Electronic watch having antimagnetic characteristic Electronic watch having antimagnetic characteristic

1975-12-19

1977-07-05

Weldon, Ulysses

Electrical generator or motor structure

Dynamoelectric

Rotary

58 55, 310256, G04B 4300

Patent

active

040331113

ABSTRACT:
In an electronic watch powered by a battery, magnetic shield members made of an antimagnetic material are disposed in a watch movement to prevent the magnetization of the watch movement under the influence of a magnetic field outside of the watch, whereby watch hands continuously operate to indicate a correct time. The watch movement includes a bridge and a base plate, and the magnetic shield members are respectively mounted in a recess in the base plate and carried by the bridge so as not to contribute to a thickness of the watch movement.

REFERENCES:
patent: 849292 (1907-04-01), Wall et al.
patent: 1247470 (1917-11-01), Turney
patent: 1377229 (1921-05-01), Tanner
patent: 2579318 (1951-12-01), Hershberger
patent: 3528703 (1970-11-01), Walton
Motor Shields, Data Sheet No. 139, Magnetic Shield Division, Perfection Mica Co., 1322 N. Elston Ave., Chicago 22, Ill., May 5, 1958, (cl. 310-85).

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