Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 709
than half way through from the one side whilst the work lies upon the anvil, so that when turnedover, the cooling effort of the punch may serve to show the place where the tool must be again ap-plied tor the completion of the hole ; the little bit or burr is then driven out, either through the… … Fig. 1788 shows the ordinary mode of making the square nuts for bolts. A flat bar is first nicked onthe sides with the chisel, then punched, and- the rough nuts, if small, are separated and strung upon theend of the poker, (a slight round rod bent up at the end,) for the convenience of managing…
Mechanical engineering
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