Method for opening a watch case and apparatus for practicing suc

Details Method for opening a watch case and apparatus for practicing suc Method for opening a watch case and apparatus for practicing suc

1993-03-01

1994-10-18

Echols, P. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29807, G04D 300, B23P 1900

Patent

active

053555716

ABSTRACT:
In order to open the watch case (1) by extraction of the crystal (2) such case is secured in an enclosure (3) after its stem and crown have been removed. Next, a suction cup (4) is applied to the crystal, such suction cup being maneuverable from outside the enclosure by means of a handle (40). By means of a pump controlled by a lever (37) the enclosure is subjected to a predetermined overpressure, following which a pulling force (A) is exerted on the suction cup until extraction of the crystal. The overpressure being the same at both the exterior and interior of the case, no displacement of air is brought about and hence no damage to the watch mechanism when the crystal is separated from the case.

REFERENCES:
patent: 1176353 (1916-03-01), Dover
patent: 2595172 (1952-04-01), Schenke
patent: 3074156 (1963-01-01), Hinrichsen et al.
patent: 3445913 (1969-05-01), Piquerez

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