Unican Security Systems, Ltd.

Charles F Sherman

A rotary cutter type key cutting machine for duplicating keys in which the V-shaped notches that define the bitting are obliquely oriented both left and right. Identical vises mounted on a hinged carrier which swings about an axis parallel to that of the rotary cutter, grip the pattern key and the key blank and present the same respectively to a position-identifying stylus and the rotary cutter. The vises are rotatable in unison about their connections with the carrier, permitting them to be so oriented that as the carrier is swung towards the axis of the cutter, the bitted and about-to-be-bitted edges of the pattern key and the key blank are either parallel to the cutter axis or inclined with respect thereto in one direction or the other depending upon the direction the vises have been rotated. The stylus is yieldingly projected to a position at which its key-engaging tip is spaced a distance from the cutter axis greater than the radius of the cutter, so that a selected V-bit in the pattern key can be engaged with the stylus and rotary adjustment of the vises as needed to have the selected V bit fit the stylus can be effected before the key blank contacts the cutter.

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Westminster, MA, United States of America

Charles F Sherman