. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 26 TRANSMISSION OF i8. GEARED I BEAMTROLLEY. Designed for mov-ing heavy articles on overhead Ibeam railways in factories. Thetrolley wheels are geared to a driv-ing shaft with sprocket wheel andchain, the lift being an ordinarytackle, not shown.

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