Portable adjustable drill jig

Details Portable adjustable drill jig Portable adjustable drill jig

1996-10-28

1998-07-07

Howell, Daniel W.

Cutting by use of rotating axially moving tool

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

Work-gripping clamp

408115R, B23B 4900

Patent

active

057758565

ABSTRACT:
The present invention is a jig which allows drilling sites to be located on a workpiece by the user simply locating the lengthwise points along the edge of the workpiece. The jig then marks the offset distance of the drilling site away from the longitudinal axis of the workpiece without the user having to make a secondary measurement to locate the point. The drilling site may be marked by a punch or a scribe at this point or the hole may actually be drilled using a drill bit. The jig contains an appropriate guide for assuring that the mark or the hole is centered at the precise location. The drill jig additionally allows holes to be drilled at angles in a face or along the edge of the workpiece using a vee block accessory. This vee block accessory allows holes to be located along the length of a workpiece lacking a planar face, such as a dowel. The vee in the block cradles the workpiece along its length so that a consistent longitudinal axis is defined. Any drilling sites are then located with respect to the longitudinal axis.

REFERENCES:
patent: 2242792 (1941-05-01), Panzer
patent: 2455024 (1948-11-01), Schneider
patent: 3069933 (1962-12-01), McCall
patent: 4893970 (1990-01-01), Becraft
patent: 5407306 (1995-04-01), Klapperich
patent: 5590986 (1997-01-01), Juang

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