Noncircular watch case
AssigneeKabushiki Kaisha Suwa Seikosha
InventorsTsutomu Miyasaka, Akio Ishiyama
Life of this patent
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Abstract
A noncircular watch case is provided which includes a case body underlying and supporting a noncircular crystal. A pin and crown arrangement is mounted in the case body and is operatively connected to the watch movement for performing a plurality of functions. Fixedly connected at its ends to the back cover of the watch is a spring member which is releasably connected to the case body interior. For releasing the case body and crystal mounted therein from its connection to the spring and back cover, the case body is provided with a lug which is fixedly mounted thereon. An upward pressure may be manually applied to the lug, while the back cover is held in fixed position for releasing the spring from its preselected setting in a groove of predetermined incline in the case body.
Claims7
A watertight watch casing comprising a back cover, a gasket of a preselected hardness mounted on said back cover, a case body overfitting said back cover and releasably connected thereto, said case body including a mounted crystal and a lug which may be pressured for releasing the connection between said case body and said back cover, said case body overlying said gasket, an upstanding support mounted on said back cover extending interiorly into said casing, and a flat configured spring mounted on said upstanding support, said spring having at least one raised portion, said case body having at least one interiorly ascending incline and at least one concomitant lateral overhang defining a groove on its interior side wall corresponding to said at least one raised portion of said flat spring, said incline having an angle of ascension having a predetermined relationship to said hardness of said gasket, said at least one raised portion of said spring being normally accommodated within said groove in said case body when said case body and said back cover are connected, said at least one raised portion of said spring being self-depressing during release and connection of said case body and back cover.
Dependencies are inferred from the claim text.