Drill fixture useful for drilling holes in bead like objects

Details Drill fixture useful for drilling holes in bead like objects Drill fixture useful for drilling holes in bead like objects

1990-04-23

1990-12-18

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

144 93R, 291606, 408 97, B23B 4100, B23B 4902

Patent

active

049782568

ABSTRACT:
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.

REFERENCES:
patent: 2418956 (1947-04-01), Silver
patent: 3303727 (1967-02-01), Hackbarth et al.
patent: 3382741 (1968-05-01), Hackbarth et al.

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