How to work it; a manual for the use of the Ben Day rapid shading mediums and its registry attachments (1913)
Day, Ben, Inc, Day, Benjamin, 1838-1916 · New York, Reprint by Ben Day, inc. · leaf 17
and forwards. Between the outer and the inner car-riages of the members F and G, powerful spiral springs encircle 7 Revoluble Sliding Carriages. MicrometricMechanismfor IncreasingColor in aStipple orLine. THE BEN DAY RAPID SHADING MEDIUMS the threaded shafts, bearing against the inner carriages and… … FIG. 7—THE IMPROVED SAFETY ADJUSTERS, OR SLIDING CARRIAGES,WITH THE IMPROVED FRAME CLAMPS. Fig. 7a—The Improved Frame Clamp locked upon the film frame. Thedotted lines show the lever open as the clamp is being placed upon or taken awayfrom the frame. Fig. 76—The thumb and forefinger used in…
Drawing instruments
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