Watertight watchcase having a removable polygonal hard glass
US4198811A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1979 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | May 30, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B39/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The polygonal flat glass 1a stretches itself out to the edge of the watchcase except on two diametrically opposed sides, where it is held between portions 3 by cylindrical pins 6 clamped within through holes formed by two semicylindrical grooves 7, 8 provided in the metallic case section and in the glass, respectively. The glass 1a and the pins 6 are held transversely in place by the pressure which gaskets 10, 11 exert on the glass. Rough walls of grooves 7, 8 and pins softer than the metallic case section and the glass increase the clamping action of gaskets 10, 11. An opaque mask formed under a peripheral glass area hides gasket 11 and the upper face of the spacing ring 14. The glass sides secured to the middle case section 2a could also be curvilinear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.