Horology: time measuring systems or devices – Electrical time base – For reciprocating or oscillating element
Patent
1985-08-08
1987-02-24
Miska, Vit W.
Horology: time measuring systems or devices
Electrical time base
For reciprocating or oscillating element
368204, 310 40MM, G04F 500, H02K 700
Patent
active
046453563
ABSTRACT:
A wristwatch comprises a watch movement having an outwardly curved frame portion, and a micro motor mounted on the watch movement. The micro motor comprises a curved magnetic core, a coil wound on the magnetic core, and a stator connected to the magnetic core to define therewith a closed magnetic flux path and having an opening therein in which a rotor is rotatably disposed. The magnetic core is curved outwardly with a curvature similar to and conforming to that of the outwardly curved frame of the watch movement, and the curved magnetic core overlies the curved frame of the watch movement so that no wasted space exists therebetween. The stator comprises a pair of stator pieces each connected at one end to a respective end portion of the curved magnetic core and the stator pieces have curved side edge portions extending at least partly along the curvature of said curved mangetic core to thereby form a compact overall assembly.
REFERENCES:
patent: 1955588 (1934-04-01), Knopp
patent: 1992826 (1935-02-01), Karasawa
patent: 2027944 (1936-01-01), Whitehead et al.
patent: 2066680 (1937-01-01), Gieskieng et al.
patent: 2793307 (1957-05-01), Gallagher
patent: 3403272 (1968-09-01), Dold
patent: 3449904 (1969-06-01), Waldburger et al.
patent: 3782101 (1974-01-01), Kuffer
patent: 4012899 (1977-03-01), Matsuura et al.
Matsuura Eiichi
Tsukada Nobuo
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Miska Vit W.
Seiko Instruments & Electronics Ltd.
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