Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 45
uld be such that the head and knee joints allow free movement of the parts and at the same time give proper rigidity. They should be so designed as to exclude dirt and moisture and should fit accurately. Fig. 23.-Head-Joint Design, ^j^^ ^^^^^^ j^j^^^g gj^^^j^ g^ ^^le shank accurately, hold the leg… … The legs are alike at this joint, and two pivoted screws areinserted in the yoke of the handle to hold the legs in position;small set screws prevent the pivoted screws from turning in theyoke. All contact surfaces are made circular, which insures aclose fit for all positions of the legs, and thus…
Mechanical drawing
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