Abstract: An apparatus for grinding the edges of lenses. A lens shaft is mounted on a frame, and a motor driven grinding wheel is provided that can be moved against a lens as well as parallel to the lens shaft. A chamber is mounted on the frame and accommodates a lens and the grinding wheel. A chamber has an observation window and walls, including oppositely disposed side walls that extend essentially perpendicular to the lens shaft, with these walls enclosing, and being spaced slightly from, the grinding wheel and the lens. The chamber has a width, i.e. the distance between the side walls, that is approximately equal to the thickness of the grinding wheel plus the axial displacement stroke of the latter. A wheel shaft that extends through one of the side walls of a chamber has two ends, one of which is disposed in the chamber and carries the grinding wheel, while the other end extends beyond the one side wall.

Abstract: A spectacle lens edge grinding machine either having a support which carries the template abutment and the grinding wheel, and which can be moved toward the fixedly mounted support shaft for the spectacle lens and the template, or a support which carries the support shaft for the spectacle lens and the template, and which can be moved toward the fixedly mounted template abutment and grinding wheel. In the first case, in the direction of movement of the support, a spring element which brings the support into its starting position acts on the support on that side remote from the support shaft for the spectacle lens and the template, and a tensioning device, which can be actuated and the tensioning force of which can be regulated, acts on the support on that side which faces the support shaft for the spectacle lens and the template.