Horology: time measuring systems or devices – Cases – With bezel or crystal details
Patent
1986-03-19
1988-02-23
Miska, Vit W.
Horology: time measuring systems or devices
Cases
With bezel or crystal details
G04B 3700
Patent
active
047275251
ABSTRACT:
The watch case including a back cover, a caseband, a crystal, the peripheral zone of which entirely covers the caseband, a casing ring including at least one packing, a pair of supports facing one another fixed to the caseband and forming therewith a slot in which the crystal may be engaged and means for displacing the casing ring in order to compress the packing against the internal surface of the crystal and block said crystal against the supports. The crystal exhibits at least in its peripheral zone a spherical form of constant thickness. The upper surface of the caseband has the form of a part of a sphere the radius of which is substantially equal to that of the internal surface of the crystal. During assembly the internal surface of the crystal is made to slide over the upper surface of the caseband with a rotational motion resulting from the sliding of a spherical surface over part of a sphere.
REFERENCES:
patent: 1333194 (1920-03-01), Wachter
patent: 1536607 (1925-05-01), Buhlman
patent: 2792684 (1957-05-01), Dinstman
patent: 4390288 (1983-06-01), Arnoux
patent: 4464063 (1984-08-01), Gogniat
patent: 4490052 (1984-12-01), Gogniat
patent: 4558956 (1985-12-01), Bettschen
Albrecht Francoise
Gogniat Paul
Scarinzi Marco
Scarinzi Renato
Miska Vit W.
Montres Rado S.A.
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