Magnetic shielding structure of analog electronic timepiece

Details Magnetic shielding structure of analog electronic timepiece Magnetic shielding structure of analog electronic timepiece

1989-04-03

1990-01-30

Miska, Vit W.

Horology: time measuring systems or devices

Displays or display device details

Dial or hand

368293, G04B 1904, G04B 3700

Patent

active

048978256

ABSTRACT:
An analog electronic timepiece for rotating hands by a motor through a wheel train has the structure that only an hour hand wheel is disposed between a main plate and a dial. The hand wheel is supported by a pin shaped projection of the main plate and a support plate fixed to the rear side of the main plate. A dial is also fixed to the rear side of the main plate through the support plate, or directly fixed to the support plate. The support plate is made of a material having a high magnetic permeability and extended to the both ends of a magnetic core of a motor assembly so that the timepiece is not easily affected by external magnetic disturbance.

REFERENCES:
patent: 4033111 (1977-07-01), Matsuura
patent: 4236240 (1980-11-01), Yoshida
patent: 4243329 (1981-01-01), Nakayama
patent: 4317188 (1982-02-01), Ushikoshi
patent: 4496246 (1985-01-01), Ota et al.

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