Alignment sight for hand drills

Details Alignment sight for hand drills Alignment sight for hand drills

1978-12-26

1980-09-16

Stearns, Richard R.

Geometrical instruments

Straight-line light ray type

Structurally installed

33286, G01L 1500, F41G 100

Patent

active

042221757

ABSTRACT:
An alignment sight for hand drills utilizes a pair of sights, preferably a fixed tool, a unitary sheet, for mounting onto the exterior surface of an electrical hand tool of the hand drill variety. The sights are arranged so that the sight line extends perfectly parallel to the longitudinal axis located in the center of the chuck of the hand drill. In use, a user marks a spot on the work piece a fixed distance from the center of the hole to be drilled. Positioning the tip of the drill bit at the location of the hole, and locating the drill bit so that it extends substantially normal to the plane of the work piece, permits the user to maintain the sights aligned with the mark thereby forever maintaining the longitudinal axis of the drill bit perfectly normal to the surface of the work piece, providing thereby, a hole extending at right angles to the surface of the work piece.

REFERENCES:
patent: 2407845 (1946-09-01), Nemeyer
patent: 2822615 (1958-02-01), Durst et al.
patent: 3026618 (1962-03-01), Vardara
patent: 3906640 (1975-09-01), Sosa

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