Horology: time measuring systems or devices – Cases – With bezel or crystal details
Patent
1982-05-18
1984-09-25
Roskoski, Bernard
Horology: time measuring systems or devices
Cases
With bezel or crystal details
368295, 368291, 368292, G04B 3700
Patent
active
044733054
ABSTRACT:
A watchcase (1) comprises a flat crystal (3) of hard material held by pressure between elastically deformable opposite side walls (4) of a recess (5) formed at the top of the body (2) of the watchcase. The bottom face (8) of the crystal (3) compresses a seal (9) arranged around the opening of the body. The restoring force exerted on the bevel of the crystal by the facing surface of the walls (4) as well as the rigidity of the crystal make it possible to make tightly sealed watchcases in which the crystal is held on the body over a portion of its margins only.
REFERENCES:
patent: 2029769 (1936-02-01), Goldblatt
patent: 3292362 (1966-12-01), Klingenberg
patent: 4308611 (1981-12-01), Kanai
Berger Peter L.
Montres Rado S.A.
Roskoski Bernard
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