Method and apparatus for duplicating keys using tip-referenced a

Details Method and apparatus for duplicating keys using tip-referenced a Method and apparatus for duplicating keys using tip-referenced a

1991-09-30

1994-05-24

Bilinsky, Z. R.

Gear cutting, milling, or planing

Milling

With regulation of operation by templet, card, or other...

76110, 409 84, B23C 335

Patent

active

053142748

ABSTRACT:
The present invention relates to the simultaneous duplication of both the bit notch pattern and shoulder position of a master key onto a key blank. The key blank is longitudinally and laterally aligned relative to a key cutter. A master key is longitudinally and laterally aligned relative to a key follower. The key follower is then longitudinally and laterally displaced relative to the master key to trace the contour of the key master. The key cutter is simultaneously displaced relative to the key blank in an identical manner to reproduce the traced contour of the master key on the key blank and to longitudinally reposition the key blank shoulder to coincide with the relative longitudinal location of the master key shoulder by cutting away a portion of the shank to reduce the length of the shank.

REFERENCES:
patent: 2605294 (1936-12-01), Simon
patent: 3245149 (1966-04-01), Haggstrom
patent: 3430535 (1969-03-01), Haggstrom
patent: 4821393 (1989-04-01), Spigarelli
Photo of key cutting machine manufactured by the Illinois Lock Company illustrating than an electric motor actuates a rubber V-belt which drives a pair of opposing cutter wheels longitudinally displaceable relative to the longitudinal axis.
Photo of key cutting machine manufactured by the Illinois Lock Company representing close-up views particularly illustrating the method in which the key blank vice grips and retains an uncut key blank between the opposing cutter.
Photo of key cutting machine manufactured by the Illinois Lock Company illustrating a cam which includes a plurality of longitudinally aligned cam elements, the surface of which is engaged and followed by a pair of opposing cam.
Photo of key cutting machine manufactured by the Illinois Lock Company more clearly depicting the variable camming surface which is followed by the cam followers to guide and control the in and out or lateral deflections of the cutter.
Photo of key cutting machine manufactured by the Illinois Lock Company shows the camming device removed from the key cutting machine in proximity to a key blank.

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