The little gold mine. Conklin's handy manual of the mechanical arts and house plans .. (1889)
Conklin, [George W.] [from old catalog] · Chicago, Laird & Lee · leaf 330
Fig. 5. … 329 fitted into a socket in the shank and held bya set screw. It is rounded on the corners togive the metal a better chance to turn uparound it. When the punch and die are setthe blank is laid on the die, and the punchshould be tight enough to carry it throughwithout a wrinkle. If the shell is not…
Industrial arts · Workshop recipes · Architectural drawing
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