Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 93
ssible by the block. In no case should it be rested upon an iron or any hard-metalblock, as that would tend to stretch the under face, and partially nullify the effects of the pening. In straightening work of cast-iron, pening bears an important part, especially in the case of ironpatterns or light… … that the distance A from the centre of one double eye to that of the other was too short; by peningthe arms on the faces denoted by B, C, and in the place denoted by B, the distance A could easilybe made correct. If the width at A were too great, similar pening at C, D would be required.The skill…
Mechanical engineering -- Dictionaries
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