Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 11
to hold its adjust-ment when once set. Figure 4 shows the methodof holding a compass, and the correct position of the fingers before and after describing a circle.The non-removable leg of the compass should car-ry a needle-point, that may be easily replaced iflost or damaged, and it should have a… … Fig, 4—Correct Manner of Holding a Compass. ing the leg of the compass a little longer or short-er as may be desired. The socket for the lead in the pencil-pointshould hold the lead firmly without the necessityof wedging it in the socket by means of paper orsmall pieces of wood. When first…
Mechanical drawing · Machine design
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