Watchcase
OwnerHans U. Klingenberginventor
Life of this patent
Estimating the term…
Abstract
In a watchcase body comprising a caseband and a glass, provision is made for fitting a wrist watch movement by means of metal rings. The caseband is of hard material, e.g., synthetic stone or sintered alumina, while the glass is of transparent mineral material, sapphire or mineral glass. The caseband and glass are permanently and rigidly joined without any intervening metal parts. The underside of the glass is metallized along the periphery, then cemented to the annular top surface of the caseband. After cementing, the watchcase body is finished by machining one or more continuous facets on the outer rim of the glass and the outer surface of the caseband.
Claims5
A watchcase comprising an annular frustoconical caseband have a top flat annular surface, a glass made of a transparent material having a flat bottom annular surface complementary to the annular surface of the caseband, said glass and said caseband being of materials of substantially the same hardness and substantially the same coefficient of thermal expansion and both having faceted side faces, said complementary flat surfaces being cemented together with said faceted surfaces in mutual registry to form an integral main member, no portion of said caseband traversing the plane of said cemented surfaces, and a bottom removably secured to said main member.
A watchcase comprising an annular caseband have a top flat annular surface, a glass made of a transparent material having a flat bottom annular surface complementary to the annular surface of the caseband, said glass and said caseband being of materials of substantially the same hardness and substantially the same coefficient of thermal expansion and both have side faces, said complementary flat surfaces being cemented together to form an intergral main member, said side faces of said glass and said caseband being formed of faceted surfaces in mutual alignment, no portion of said caseband traversing the plane of said cemented surfaces, and a bottom removably secured to said main member.
Dependencies are inferred from the claim text.