Cyclopedia of the Useful Arts Including Agriculture Architecture Domestic Ec
Cyclopedia of the Useful Arts Including Agriculture Architecture Domestic Ec
Thomas Antisell
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325 steam winch had just driven the piston in one direction was allowed to escape to the chimney, while steam from the boiler was admitted on the other side of the piston, to impel it in the contrary direction ; and in this manner the piston was continually driven backwards and forwards, in a horizontal direction, and parallel to the direction of the load. The piston rod was moved through a hole cor- responding with it in magnitude, in the cover of the cj'linder, in which it was ren- dered stea...m tight by a stuffing box proper- ly lubricated. The piston rod acted by means of a connecting rod on a crank, which it kept in revolution in the same manner as the crank in a common double-acting steam engine is moved. (See STEAM EN- GINE. ) On the axle of this crank was placed a cogged wheel which by means of ordinary gearing, conveyed motion to the axle of the hind wheels of the engine, so as to keep that axle in constant revolu- tion. The wheels being keyed upon that axle, so as not to be capable, like the wheels of a common carriage, of turning upon it were necessarily made to revolve with it ; and so long as their pressure upon the road was sufficient to prevent them from slipping, a progressive mo- tion of the carriage was the necessary consequence of their revolution.
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