Gear cutting – milling – or planing – Milling – With regulation of operation by templet – card – or other...
Patent
1978-07-21
1980-02-12
Briggs, William R.
Gear cutting, milling, or planing
Milling
With regulation of operation by templet, card, or other...
76110, 409 81, B23C 116
Patent
active
041881630
ABSTRACT:
A machine for cutting a key blank edge into a duplicate, predetermined key edge shape, which shape is identified by a code. The blank is clamped within a vise mounted upon one end of an elongated lever which has a stylus mounted upon its opposite end and is centrally journalled upon a fixed shaft for sliding movement along the shaft and for rocking about the shaft. A guide is positioned adjacent the stylus so that as the lever is moved along the shaft, the stylus contacts and moves upon the guide surface in a path parallel to the shaft. The guide surface is formed by clamping together in face to face relationship, a number of substantially identical, narrow, elongated, thin blades, each having a guide edge which is formed with successive steps of predetermined depth and length. One pre-selected step of each blade is aligned with the stylus path so that the aligned steps form the guide surface which, when contacted by the stylus, causes the lever to rock and to correspondingly move the key blank in a direction transversely to the shaft axis in a direction towards and away from a cutter wheel for thereby shaping the edge of the blank into the predesired key edge shape. The blade steps each correspond to a known coded depth of a portion of a key edge, so that a known key can be duplicated by appropriately positioning the blade steps.
REFERENCES:
patent: 969702 (1910-09-01), Johnson
patent: 1889461 (1932-11-01), Hansen
patent: 1923164 (1933-08-01), Roos
patent: 2038949 (1936-04-01), Mintz
patent: 3011411 (1961-12-01), Raymond
patent: 3440906 (1969-04-01), Allen
patent: 3791240 (1974-02-01), Meoni
patent: 3919920 (1975-11-01), Schlage
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