Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . jRot^ and T^aversing-tVhtei Propeller. surfaces are traversed by upon an arm ex-tending from the boat, the wheel being rotated by amotor on board. Rail-bender. {Raihcay Enqineering.) An im-plement for bending or straightening rails, or forbreaking steel rails to such lengths as may be re-quired. It has two curved branches on which therail rests, while a
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . jRot^ and T^aversing-tVhtei Propeller. surfaces are traversed by upon an arm ex-tending from the boat, the wheel being rotated by amotor on board. Rail-bender. {Raihcay Enqineering.) An im-plement for bending or straightening rails, or forbreaking steel rails to such lengths as may be re-quired. It has two curved branches on which therail rests, while a powerful screw or a plunger oper-ated by hydraulic pressure is brought to bear againstit at a point midway between them. The hydraulicform affords the greater power, and is more con-venient and expeditious. Fretjuently called a (which see). See also E F, Plate XXV. Rail-chair. (Railway.) A socket for a rail,where it rests upon the sleeper. See Railway- CIHIR. Rail-clamp. (Railway Engineering.) A devicedesigned for firmly holding rails on lines of track soas to prevent any shaking motion. Scotts clamptruss-joint (Fig. 4116) is in twoFig. 4116. , the upper curved branch- es of which are caused to bind , Fig. SeUers^s Raii-Drittlng Mixchine, (Metal-working.) The built-upFig. 4119. isj:^?^^;^^?^
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