Lens surface former and polishing tool
OwnerStephen J. Wyldeinventor
Life of this patent
Estimating the term…
Abstract
A lens surface former and polishing tool of one-piece construction and made, for example, of aluminium, aluminium alloy or a zinc-based alloy with one side surface of the block being of convex form and the other side surface of the block being of concave form, in which, projecting radially from the cylindrical peripheral surface of the main part of the block, is an annular flange or ledge which is interrupted at equi-distant points by four tapered location grooves or slots extending longitudinally of the tool so as to be parallel to the longitudinal axis of the tool, the flange or ledge with its tapered grooves or slots thereby permitting the tool to be quickly mounted on holding means forming part of a lens-grinding or lens-generating machine.
Claims12
A lens surface former and polishing tool comprising a generally circular block of material formed symmetrically about a rotational axis of the tool, lens-generating or lens-forming surfaces on two opposite-facing sides of the block, at least one flange or ledge formed on the block and projecting radially outwards with respect to the rotational axis of the tool to act as securing means for securing the block on a lens-generating machine or a lens-polishing machine, and location grooves formed in the flange or ledge on the block, and
- wherein at least one of the grooves is of a different width from the other grooves so as to permit the grooves to cooperate with holding lugs of unequal width for axis location on a lens-polishing machine.
A tool/tool holder assembly comprising a lens surface former and polishing tool held on a tool holder,
- the lens surface former and polishing tool comprising a generally circular block of material formed symmetrically about a rotational axis of the tool, lens-generating or lens-forming surfaces on two opposite-facing sides of the block, at least one flange or ledge formed on the block and projecting radially outwards with respect to the rotational axis of the tool to act as securing means for securing the block on a lens-generating machine or a lens-polishing machine, and location grooves formed in the flange or ledge on the block, and
- said tool holder being in the form of a cup-shaped part or nest which receives the lens tool in such a way that a cylindrical surface on the lens tool opposes a corresponding cylindrical surface on the cup-shaped part or nest, the cup-shaped part or nest also having spaced-apart lugs which engage in the grooves on the tool so as to drive the latter.
Dependencies are inferred from the claim text.