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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 252

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 252
638. THE DEAD CENTER PROB-LEM. The crank pin is held off the cen-ter by the spring J, the tension of whichalways pushes the crank pin off the center.Shows the action of a single treadle iny the two extreme positions. 639. THE DEAD CENTER PROBLEM.A supplementary crank set at an angle with thepedal… … 640. CRANK SUBSTITUTE. The shaft to bedriven has recesses in which are pawls or frictiondevices, two rings being placed on the sleeve hav-ing internal ratchets when pawls are used, whilebands are connected to the rings and to a frame sothat when the frame is moved downward one of therings on the…

Mechanical movements

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