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 958
lock is of cast-iron, in the form of a hollow frustrum of a cone,with a hemispherical bottom. In order to give it the requisite strength, the block is closely hoopedwith wrought-iron over all the conical part, except in the places where it is embraced by the suspensionstraps; for this purpose the…
Mechanical engineering
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