Gem faceting machine having an adjustable faceting head support

Details Gem faceting machine having an adjustable faceting head support Gem faceting machine having an adjustable faceting head support

1975-06-06

1976-11-23

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51229, 744248A, B24B 916

Patent

active

039928217

ABSTRACT:
An adjustable faceting head support assembly having an upright mast with a longitudinal open groove that receives an elongated vertical lead screw. The lead screw is mounted within the groove about an axis parallel to the axis of the mast. A collar assembly encompasses the lead screw and mast for longitudinal sliding movement along the mast. A half nut mechanism provided on the collar enables selective engagement and disengagement with the lead screw. An adjusting knob at an upper end of the lead screw allows for precise rotation of the lead screw to locate the faceting head at a precise position with respect to a lap surface when the half nut is engaged with the lead screw. When the half nut is disengaged from the lead screw, the faceting head may be moved freely along the mast axis, permitting one to quickly position the faceting head over the lap.

REFERENCES:
patent: 357567 (1887-02-01), Barnes
patent: 1467039 (1923-09-01), Hume
patent: 3818641 (1974-06-01), Long

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