Drill sight for an electric hand drill

Details Drill sight for an electric hand drill Drill sight for an electric hand drill

1974-06-06

1976-03-30

Aegerter, Richard E.

Geometrical instruments

Straight-line light ray type

Structurally installed

33276, 33286, 33334, 33370, G01C 100, G01C 1500, B23B 4514

Patent

active

039464938

ABSTRACT:
A drill sight for visually estimating the angle at which an electric hand drill is oriented relative to the surface drilled, the drill sight is mounted to the top of the electric drill and has a tubular casing with a hollow bore with internal wall markings and with a cross hair at one opening. By projecting a line of sight normal to the surface drilled and through the cross hair to a selected wall marking, the orientation of the drill can be determined.

REFERENCES:
patent: 889273 (1908-06-01), Thomas
patent: 1190121 (1916-07-01), Critchett
patent: 2877561 (1959-03-01), Morse

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