Watchglass fixing structure for timepiece

Details Watchglass fixing structure for timepiece Watchglass fixing structure for timepiece

1978-05-19

1980-06-10

Jackmon, Edith S.

Horology: time measuring systems or devices

Cases

With bezel or crystal details

73431, 368286, G04B 3708, G04B 3900, G01D 1126, G01L 1914

Patent

active

042065917

ABSTRACT:
A watchglass fixing structure in which a watchglass fixing member is provided with an annular groove having a groove width approximately equal to the combined thicknesses of the outer diametric portion of a watchglass and the outer circumferential portion of a backing ring, a flange at the upper portion of said annular groove, the inner diameter of the flange being smaller than the outer diameter of said watchglass, and with an inner circumferential surface at the lower portion of said annular groove, the diameter of the inner circumferential surface being larger than the outer diameter of said watchglass. The watchglass is fitted into an upper half of said annular groove of said watchglass fixing member through a waterproof packing, while the outer circumferential portion of said backing ring is inserted into a lower half of said annular groove.

REFERENCES:
patent: 2332458 (1943-10-01), Muney et al.
patent: 3355875 (1967-12-01), Jeanmonod et al.
patent: 3858388 (1975-01-01), Fujimori et al.
patent: 3934402 (1976-01-01), Fujimori
patent: 4132062 (1979-01-01), Fujimori

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