Drill guide and support therefor

Geometrical instruments – Straight-line light ray type – Structurally installed

Patent

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Details

33334, 33286, B23B 4514

Patent

active

050521128

ABSTRACT:
An optical drill guide and a drill guide support for electric hand drills. The drill guide consists of a front sight aperture framed with a light color and a rear sight aperture formed by a translucent ring. The line of sight through the guide is arranged to be aligned with the longitudinal axis of the drill. The drill guide is used in conjunction with a mirror placed on the work surface so that when the guide is aligned a reflected image of the front sight surrounds the translucent ring. The guide is adapted to be integral with or detachable from the electric hand drill. When detachable, a drill guide support is provided which includes mounting means the ends of which are resiliently biased towards each other and adapted to be received in the housing of the drill to align the guide with the axis of the drill.

REFERENCES:
patent: 2553540 (1951-05-01), Beckerman
patent: 2806296 (1957-09-01), Weichert
patent: 3052036 (1962-09-01), Oliver
patent: 3500545 (1970-03-01), Chivers
patent: 3906640 (1975-09-01), Sosa
patent: 3946493 (1976-03-01), Torres
patent: 4222175 (1980-09-01), Bernicky
patent: 4295279 (1981-10-01), Sienknecht
patent: 4546549 (1985-10-01), Duperon
patent: 4785544 (1988-11-01), Heinsius et al.
Brochure: Stanley Drill Guide.
Brochure: Black & Decker Workmate Accessory Guidemate 79-015-04, Jul. 1978.
Brochure: Black & Decker Owner's Manual-Drill Guide.
Brochure: Test Rite Precision Drill Guide Instructions.

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