Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 592
e purpose. The en-graving shows a pair ol >i joined, one for long the other for circular saws. Alter being 1.. Ithe saws are supported in mid air, on buttons attached to the framing at the base of the machine. Theheavy drop-weigl e now liberated by pulling the cords B B, and the •. pon theii… … III ■ ■ ;}86 SCREWS—SELF-OPERATING SHAVER. have a double, triple, or quadruple thread, such, for example, as would be formed by placing 2, 8, or 4strings in contact, and coiling them as a flat band round the cylinder. The screw may also vary insection, that is, the section of the worm or thread may…
Mechanical engineering
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