Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1916)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 39
Fig. 49. Ratchet Brace … Fig. 50. Auger Bits venience of the ratchet will soon be apparent from the necessity, sooften arising, for boring holes or driving screws in angles or closeto projections where the full sweep of the brace cannot be taken.Braces are made in many sizes, with sweeps varying from 6 inchesto 14 inches…
Patternmaking
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