Horology: time measuring systems or devices – Cases – With bezel or crystal details
Patent
1979-08-02
1980-12-23
Weldon, Ulysses
Horology: time measuring systems or devices
Cases
With bezel or crystal details
368295, 368296, 368300, 368314, 368276, G04B 3700
Patent
active
042414423
ABSTRACT:
A novel construction is provided for a timepiece of the type having a shaped (or non-circular) case and crystal in conjunction with a circular caseback. The construction typically includes a shaped case having a shaped recess in one side and a circular aperture in the other side with a central cylindrical bore therebetween. The bottom of the shaped recess is formed by the intersection of the recess and cylindrical bore and is in the form of an annular shoulder having a non-circular outer periphery and a circular inner periphery providing a central opening in the recess bottom. Supported in the cylindrical bore and visible through the central opening in the bottom of the recess is a circular dial plate. A decorative annular mask having a shaped outer periphery corresponding to that of the recess and circular inner periphery of such size to provide a circular window for viewing the dial plate overlies the annular shoulder of the recess bottom to hide the annular shoulder from view and provide a decorative border around the circular dial plate when viewed through a transparent crystal shaped to fit in the non-circular recess. The decorative mask typically is positioned between the crystal and annular shoulder and may be an independent preformed annular member or a coating applied to the crystal or shoulder.
A circular caseback is usable with this novel construction to close off the aperture on the other side of the case. A water-resistant timepiece can be readily provided by placing a resilient O-ring between the circular caseback and case and sealant such as epoxy between the crystal and case.
REFERENCES:
patent: 3748849 (1973-07-01), Takagi
patent: 4136515 (1979-01-01), Thompson et al.
Timex Corporation
Timmer Edward J.
Weldon Ulysses
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