Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 46
INSTRUMENTS AND MATERIALS 33 right hand. In this way, the instrument can be quicklyclosed or opened to the maximum capacity. This method isused only to obtain approximate adjustment and the finalsetting should always be made with one hand alone, as pre-viously described. The Compass. — The compass… … Fig. 5. Drawing a Circle with a Bow Pen care of the ruling pen also apply to the pen used in the com-pass. The needle point should be adjusted so that the pointof the pen is even with the shoulder on the needle-bar asshown. The needle-bar should be locked in this positionwhere it should remain…
Mechanical drawing
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