[452]. Central cylinder and radiating lever motion.
[453]. Jointed radiating arms, with belt gear for conveying motion from a central spindle to one having a travel covering any point within a circle of the extreme radius of the jointed arms.
See also [Nos. 348], [349].
Endless rubber or wire coil belts are used to give motion to machines having some amount of freedom of movement as regards the fixed position of the driving pulley.
Section 24.—CUTTING TOOLS.
Besides the ordinary cutting tools in use in the workshop, such as the chisel, gouge, plane, saw, drawknife, scissors, shears, scythe, and others, and which do not properly belong to machine devices, there are others, some of them mere modifications of the ordinary tools that are sometimes needed in the design of machines, and are illustrated here.
Other appliances are—Shears: see the ordinary shearing machines, bookbinder’s shears, [No. 462], and other modifications. In some the shears are hinged at one end, in others the movable blade moves either with equal or unequal motion at either end by cam or crank motion (see [462].)
[454]. Pipe cutter, with V-edged cutting roller. Sometimes 3 cutting rollers are used. See [No. 466].
[455]. Cutting discs, used for paper, sheet metal, &c.