ARM LENGTH MEASURING FRAME FOR FRAME OF VARIOUS SIZE WITH FEEDING WHEEL

摘要

PROBLEM TO BE SOLVED: To enable la measuring frame to accurately and rapidly measure the arm length of spectacles with various sizes of frame width by an arm length measuring frame for frames of various sizes with a feeding wheel and to utilize measured results for adjusting a drawing of spectacles. SOLUTION: The feed screw 3 of the measuring frame 1 with graduation for frames of various sizes is provided with a moving part 4 for various kinds of frame width. An arm sending device part 12 attached to a hinge 7 of the moving part 4 is provided with the feeding wheel having a lacking part and the feeding part 14. A measuring arm 8 with an irregular surface 10 and the measuring graduation 11 is attached thereto to surely measure arm length. Further the measuring frame 1 with graduation is made to be linear and a fixed nose pad 6 and the hinge base 7 are set at zero positions and accurate measurement from a nose 21 till an ear 20 is executed.