Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1987-10-21
1990-03-13
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51124L, 51284R, B24B 700
Patent
active
049073737
ABSTRACT:
A toric finer-polisher for the fining and/or polishing of a toric lens comprises a lap table for holding a tool, a spindle on which the lap table is mounted, a rocker arm assembly for holding the lens in contact with the tool, and a motor for driving the spindle and lap table so as to cause relative motion between the tool and the lens, thereby finishing the surface of the lens. The spindle is fixed at its lower end to a gimbal, and is contacted at an intermediate point along the spindle by a timing belt connected to the motor, so as to maximize a gimbal radius of the lap table assembly, thus maintaining a parallel relationship between the tool axis and the lens axis during finishing of the lens surface. Other features of the invention include provision of all motions (rotational, orbital and transverse) by a single motor, provision of a two-spindle arrangement in which dual spindles are timed in their oscillatory motions so as to cancel normally encountered reactionary forces, provision of a gear reduction mechanism between the motor and a break-up motion assembly so as to provide break-up motion on a reduced-speed basis, and provision of a pressure-operated lap table for holding the tool on the lap table surface under the influence of air pressure.
REFERENCES:
patent: 3552899 (1971-01-01), Tagnon
patent: 3732647 (1973-05-01), Stith
patent: 3782042 (1974-01-01), Strasbaugh
patent: 4135333 (1979-01-01), Stith
patent: 4143490 (1979-03-01), Wood
patent: 4320599 (1982-03-01), Hill
patent: 4419846 (1983-12-01), Schimitzek
patent: 4510717 (1985-04-01), Sherwin
patent: 4521994 (1985-06-01), Tusinski
patent: 4534137 (1985-08-01), Sarofeen
Hunter Billy D.
Tusinski Joseph
Kile Bradford E.
Schmidt Frederick R.
Shideler Blynn
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