Apparatus for the preparation of eyeglass lenses, prior to the shaping and/or bevelling thereof

Claim 1

Apparatus for the preparation of eyeglass lenses, prior to the shaping and/or bevelling thereof, said preparation consisting of marking or attachment of a holding member to said lens, characterized in that it comprises: a body, a cavity in the upper horizontal surface of said body, an annular member adapted to be located in said cavity and capable of rocking in any direction, said annular member having at least three arms adapted for supporting a lens extending from the upper surface thereof, means for directing a concentrated light beam through the cavity, an upright column attached to said body, an arm mounted for up and down movement to said upright column and having an aperture over said cavity, three bosses extending from the lower face thereof and disposed, preferably, as the apexes of an equilateral triangle, said bosses being adapted to hold the lens together with the arms of the annular member, a spring urging said arm in a downward direction, means for lifting said arm against the urging of said spring, a transparent plate supported by said arm and capable of rotation around said upright column, said plate having a millimeter reticle, means mounted to the arm and to the plate suitable for ensuring a particular relative position between the two, an upright support column and a guide post attached to said body, and interchangeable means for the preparation of a lens prior to shaping thereof mountable on the upright support column and the guide post.