Grinding machine for ophthalmic glasses
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United States of America Patent
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Jun 2, 1998
Grant Date -
N/A
app pub date -
May 18, 1995
filing date -
May 19, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention is a grinding machine for ophthalmic glasses (14) of the type featuring a carriage (10) bearing a clamping axle in two parts (12A, 12B) between which a blank (14) of an ophthalmic glass is clamped and of the type equipped with a clamping device which axially acts upon at least one (12B) of the two parts (12A, 12B) of the clamping axle and features to that effect at least one geared motor (60, 66) and motor motive power transmission components (54, 28) which cause an axial translation of said part (12B) of the clamping axle, characterized by the fact that one (54) of the transmission components (28, 54) slides in relation to the carriage (10) in a direction parallel to the clamping axle against which (10) it rests axially with a reaction spring (80) mounted in between, and by the fact that a control unit is provided to vary the motor (66) motive power, and thus the axial clamping force on the blank (14) as a function of the elastic deformation of the spring (80).
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