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US 4,978,256 AGranted
Drill fixture useful for drilling holes in bead like objects
AssigneeRio Grande-Albuquerque, Inc.
InventorsRobert Wellington, Louis Bell
Life of this patent
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AssigneeRio Grande-Albuquerque, Inc.
InventorsRobert Wellington, Louis Bell
Estimating the term…
A drill fixture for holding and aligning a bead like object, such as a pearl, relative to a drill bit for accurately drilling a bore in the object includes an elongate main body having a base at one end and a clamping member threaded on its opposite end. A pair of like elongate drill guide bushings are respectively mounted in the base and clamp member in opposed coaxial alignment with each other. The opposed ends of the bushings project into an externally accessible recess in the main body and, by actuation of the clamp member, an object to be drilled may be clamped between concave seats on the opposed ends of the bushings in axial alignment with drill guide bores extending through the bushings. The bushings are formed of a relatively firm resilient material to firmly clamp the object without marring the surface of the object. The fixture is formed with an annular flat surfaces on each of its opposite ends to stably support the fixture on a drill press table in either an upright or inverted position while affording drill bit access to the drill guide bore of the uppermost bushing.
A drill fixture useful for drilling holes in bead like objects such as pearls, said fixture comprising a pair of like elongate drill guide bushings of a relatively firm resilient material, each bushing having a concave bead receiving seat at one end thereof and a central drill guide bore extending longitudinally through the bushing from said bead seat to the other end of the bushing, mounting means for mounting said bushings with their drill guide bores in coaxial alignment with each other and the bead seats of the bushings in facing opposed relationship to each other and exposed within an access recess in said mounting means intermediate the opposite ends of said mounting means, said mounting means having drill access openings in its opposite ends accommodating the insertion of a drill into a drill guide bore from either end of said mounting means, clamp means on said mounting means for moving one of said bushings longitudinally of said mounting means relative to the other of said bushings to clamp a bead like object between the bead seats of said bushings, and support means at each end of said mounting means for stably supporting said mounting means at either end upon a horizontal support surface.
A drill guide fixture useful for drilling bores in bead like objects such as pearls comprising a pair of like elongate drill guide bushings of a relatively firm resilient material having a longitudinal axis, each of said bushings having a central drill guide bore extending coaxially of said axis through the bushing from end to end, elongate mounting means having a transverse central recess therein between its opposite ends mounting said bushings in longitudinally aligned opposed end to end relationship to each other with opposed ends of said bushings projecting longitudinally of said mounting means into said recess from opposite sides of said recess, the opposed ends of said bushings having concave bead receiving seats therein adapted to locate a bead like object in axial alignment with the drill guide bore axes in said bushings, manually operable clamp means on said mounting means for shifting said bushings axially toward and away from each other to selectively clamp a bead like object between the bead seats of said bushings, and support means for stably supporting said mounting means upon either of its opposite ends on a support surface.
Dependencies are inferred from the claim text.