Watch frame comprising a case and a supporting device
US5901117A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1998 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Jun 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B39/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A watch case has a water-tight casing (1) capable of being manufactured economically in hard materials, the casing parts being held assembled by an external support device (2) having structure for attaching the-case to a wristlet or other fixing apparatus. The casing (1) is formed of stacked parts preferably including a crystal (7), an annular middle part (9) and a back cover (8). The mutual contact surfaces (13, 14, 15, 17) of these parts are polished and have no sealing gasket. The support device includes two parallel metal clamps (25) in the form of an open or closed frame, having two portions assembled by screws (28) arranged axially to grip the casing in the clamp. The casing (1) may be made entirely of sapphire, but other materials having zero porosity or a closed structure such as hard metals, ceramics or mineral glass may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.