Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 382
^ of the blades of the pen, when using the pen against astraight-edge. The spring of the pen which separates the two bladesshould be strong enough to hold the upper blade in position, but not sostrong that it will interfere with easy adjustment of the thumb-screw ;the thread of the thumb-screw… … Flu. 387. DRAWING INK. Liquid India ink can be procured in bottles withglass tube feeders, as in Figs. 588 and 589, or with aquill attached to the cork, by means of which the penmay be filled by drawing it through the blades; acommon writing pen may aso be used for filling thepen in the same manner…
Mechanical drawing · Machine design
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