Watchcase

Details Watchcase Watchcase

1983-04-08

1984-10-30

Roskoski, Bernard

Horology: time measuring systems or devices

Cases

With protection means

368280, 368309, G04B 3700

Patent

active

044797257

ABSTRACT:
A watchcase comprising a case body having a recessed shoulder at the corner of the axially extending inside wall and the bottom thereof, and a back made of hard metal having a longitudinal elasticity modulus larger than 25,000 kg/mm.sup.2 and secured to the bottom of the case body. A reinforcement ring having an L-shaped section is secured to the inside wall of the back so that a groove is defined by the outside wall of the reinforcement ring and the inside wall of the recessed shoulder. An O-ring is engaged with the groove for water-tight sealing.

REFERENCES:
patent: 3817025 (1974-06-01), Siegrist
patent: 4363555 (1982-12-01), Finger
patent: 4397566 (1983-08-01), Lederrey

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