Stone working – Splitting – shearing – and punching
Patent
1992-11-09
1994-07-05
Lavinder, Jack
Stone working
Splitting, shearing, and punching
83879, 83565, 51101R, 51101LG, 33 2308, 33 2311, B23B 328, B24B 914
Patent
active
053258401
ABSTRACT:
A pattern holding assembly and a crystal material holding assembly are paired on opposed ends of a shaft passing transversely through a base unit such that the pattern and the crystal material are simultaneously rotated with a driven shaft through 360 degrees of angle, or multiples thereof, by an exterior drive mechanism. A second shaft, directed through the base unit to be parallel to the first axis, and to pivot about its longitudinal axis, is adapted to carry a stylus bit for tracing the pattern and a cutter bit for scribing the pattern onto the crystal material. The two shafts are offset sufficiently to enable rotation of the second shaft to completely follow the pattern, the stylus and the cutter bit being continuously in transverse alignment. Provision is made for holding and releasing both the pattern and for the crystal material, and for translating the stylus and cutter shaft longitudinally to enable engagement of the stylus into the pattern, and then for engaging the cutter bit onto the crystal material with an appropriate inscribing pressure.
REFERENCES:
patent: 2421065 (1947-05-01), Hoffer
patent: 3435563 (1969-04-01), Reaser
patent: 3673742 (1972-07-01), Colbaugh
patent: 4000766 (1977-01-01), Sutcliffe
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