Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1977-10-28
1979-01-23
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 58, B24B 1302
Patent
active
041353331
ABSTRACT:
An apparatus for grinding cylindrical lenses, comprising a frame supporting a motor-driven apparatus in which a vertical driving pin is adapted to be moved parallel to itself, in complex motion, which is substantially non-repetitive. Three separate drive means are provided for producing eccentric motion of selected amplitude, and individually controllable relative phase angle with each other. The driving pin is connected with a universal joint, to a vertical post which is pivoted at its bottom end, and adapted for angular motion forward and backward and to each side, but does not have any component of rotary motion about its own axis. Arm means are provided attached to the post, for pressing a lens block holding a lens to be ground, against a stationary lap, so as to grind a cylindrical surface on the lens.
REFERENCES:
patent: 1593212 (1926-07-01), Hart
patent: 3552899 (1971-01-01), Tagnon
patent: 3782042 (1974-01-01), Strasbaug
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