G - Physics – 02 – C
Patent
G - Physics
02
C
G02C 1/02 (2006.01)
Patent
CA 2430768
A lens mounting arrangement for eyeglasses includes an eyeglass frame component, an externally threaded stud projecting from the component, an eyeglass lens having a hole large enough to loosely accommodate the stud, and a plastic nut cooperable with the stud for securing the lens to the frame component. The nut has an axial bore including a side wall which is initially smooth and unthreaded. The diameter of the bore is such that as the nut is turned on to the stud, the threads of the stud produce a corresponding internal thread in the side wall of the bore. As a result, the interengagement of the threads of the stud and nut secure the lens to the frame component. The nut comprises a tubular body and an enlarged head at one end of the body, the head becoming seated against the lens so that the lens, when mounted, is sandwiched between the frame component and the head of the nut. The tubular body of the nut is initially longer than the thickness of the lens, and prior to turning the nut onto the stud, the tubular body is cut to a length no longer than the thickness of the lens.
Moffat & Co.
Tura Lp
LandOfFree
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