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)
lf circles, i,j, k, /, etc.,being drawn, the sides of the slots may be drawn inwith the triangle, and the outer circle and the slotsinked in. If the slots are not to radiate from the centre ofthe circle the process is as follows: The outer circle a, Figure 1 yy, being drawn, an innerone b is drawn,… … c for the slots, and arcs ?\ /, are then drawn for thelengths of the slots. The centre lines e are thendrawn, passing through the lines cf and the arcs i,j\etc., and touching the perimeter of the inner circle b;arcs f, g, are then marked in. and their sides joinedwith the triangle adjusted by hand.…
Mechanical drawing
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