Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1978-05-08
1979-08-14
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
74569, 409 79, 409147, B24B 914
Patent
active
041640977
ABSTRACT:
An optical lens grinder device including a main base and a lens carriage pivotally slidably connected along one edge to the base. A first motor mounted on the base drives a pair of closely spaced apart grinder wheels, one for shaping and sizing a lens blank, the other for peripherally beveling the edges thereof. Lens blanks to be ground are pneumatically clamped in a chuck and rotated by a second motor mounted to the lens carriage; and a cam arrangement connecting between the base and lens carriage moves a lens clamped in the chuck, sequentially and in a timed relation, over the first grinder wheel, lowers it for shaping and sizing thereon in conformity with a lens template fixed to the chuck drive shaft, pivots the lens carriage with the lens upwardly out of engagement with the first grinder wheel, moves the lens carriage laterally to position the lens over the second or beveling grinder, lowers the lens into engagement with the beveling grinder for the beveling operation, after which the lens carriage pivots the finished lens upwardly for removal from the chuck.
REFERENCES:
patent: 1269680 (1918-06-01), Bugbee
patent: 3513598 (1970-05-01), Asselin et al.
patent: 3673738 (1972-07-01), Stern
patent: 3738064 (1973-06-01), Szyferblatt
patent: 3745720 (1973-07-01), Savage
patent: 3798844 (1974-03-01), Hannaman
patent: 3894361 (1975-07-01), Georgiadis et al.
patent: 4003165 (1977-01-01), Saun
Adolphson K. Bradford
Whitehead Harold D.
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