Grinding machine for guided or non-guided beveling or grooving of an ophthalmic lens

Claim 1

Machine for beveling or grooving an ophthalmic lens, said machine comprising, at a machining station, a frame, a first support shaft, means mounting said first support shaft on said frame for rotation, at least one beveling or grooving grinding tool on said first support shaft, a motor forming means for driving said first support shaft, a rotatable second support shaft, means mounting said second support shaft on said frame parallel to said first support shaft and for rotation, said second support shaft having means for axially gripping an ophthalmic lens for edgewise contact of such lens with said beveling or grooving grinding tool, at least one of said support shafts being a mobile support shaft, and carried on a support member for movement relative to said frame and parallel to the axis of said mobile support shaft, displacement means for procuring guided displacement of said mobile support shaft parallel to its axis comprising a drive member, selectively engageable coupling means arranged between said mobile support shaft and said displacement means, said coupling means comprising two spaced flanges disposed transversely relative to the axis of said mobile support shaft and fastened to a selected one of said support and drive members, and abutment means disposed between said flanges carried by the other of said drive and support members, said abutment means being movable generally perpendicularly to said flanges between a disengaged position in which said abutment means are out of engagement with said flanges for uncoupling said mobile support shaft from said displacement means and an engaged position in which said abutment means are braced between said flanges for coupling said mobile support shaft with said displacement means.