Feeler for contour reading apparatus
AssigneeEssilor International Cie Generale d'Optique
InventorJean Marie Godot
Life of this patent
Estimating the term…
Abstract
A feeler for reading the contour of the rim of a spectacle frame has a reading head on a rod carried by a support which is linked by a ball joint to a fixed base. A cylindrical skirt on the support co-operates with the base and with a displacement detector which provides an indication which is employed to maintain contact of the rim with the reading head.
Claims15
A contour feeler assembly for tracing the contour of a groove in the rim of a spectacle frame, said assembly comprising a relatively axially elongated rod having a tracing head shaped to operatively engage the groove of a spectacle frame, a support, means mounting said rod on said support, said support including an end portion remote from said tracing head, a base, means pivotally mounting said support on said base in the form of a ball joint including a first ball joint member secured to said end portion of said support and a second ball joint member secured to said base, a skirt, means mounting said skirt coaxial to said rod and for pivotal movement with said support, said skirt having a free edge facing said base, and at least one detecting means fixed relative to said base for detecting the position of the free edge of said skirt with respect to said base.
Apparatus for tracing the contour of a groove in a spectacle frame rim, said apparatus comprising a support plate for a spectacle frame;
- displacement control means connected to said support plate operable to effect translational movement of said support plate;
- a feeler assembly including a tracing head for following the contour of a groove in the rim of a spectacle frame, a support member, means mounting said tracing head on said support member, said support member including an end portion remote from said tracing head and defining an axis, a base member, ball joint means operatively connected between said support member end portion and said base member, a cylindrical skirt member mounted coaxially on said support member intermediate said tracing head and said ball joint means and having a free edge facing said base member;
- and detecting means for detecting the position of said skirt member with respect to said base member, said detecting means being operatively connected to said displacement control means to more movement relative to said support plate in such a manner that the spectacle frame is maintained in contact with said tracing head of the feeler assembly.
A feeler assembly comprising a tracing head for following the contour of a groove in the rim of spectacle frame, a support member, said support member including an end portion remote from said tracing head;
- means mounting said tracing head on said support member, a base member, ball joint means mounting said support member on said base member, said ball joint means being disposed at said end portion of said support member remote from said tracing head between said support member and said base member, a skirt member mounted on said support member intermediate said tracing head and said ball joint means and facing said base member, and detecting means for detecting the position of said skirt member with respect to said base member in response to displacements of said tracing head in the groove of a spectacle frame rim.
Dependencies are inferred from the claim text.