Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)
These joints should be sufficiently stiff that … Fig. 33- Fi§- 34- they will not move too easily, and yet will move ratherthan that the legs should sensibly spring withoutmoving at the joint. The needle-point leg should beadjusted by means of the joint, to stand vertical,and the same remarks apply equally to the pen-leg ; but in the case of the…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
