Hill, John A. (John Alexander), 1858-1916, Sinclair, Angus, 1841-1919 · New York : American Machinist Pub. Co · leaf 779
arrangement,the boll being held in ihe side clamp firmly whileIhe head is being formed. The lever is so arrangedas to punch the keyway at the same time. Themost ingenious part of the machine is Ihe punchholder, shown in Fig. 4. This holder is large andstrong, for attachment to the standard, but…
Railroads · Locomotives
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
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