. 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. em with loop blocksto support the fall rope. The traction rope is anendless one, driven fromone end of the carrier lift is three times thepower of the fall rope. 332 ENGINEERING AND CONSTRUCTION, ETC. 859. CRIB DAM. Ottawa River type. A crib framing of timbe
. 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. em with loop blocksto support the fall rope. The traction rope is anendless one, driven fromone end of the carrier lift is three times thepower of the fall rope. 332 ENGINEERING AND CONSTRUCTION, ETC. 859. CRIB DAM. Ottawa River type. A crib framing of timberfilled in with stone, topped by a slope frame of 3 to i, and apron with its apex at half the width of the crib todivide the total fallof the water. B,cross planking ontop and filling ofstone and earth. 860. COUNTERBALANCED DRAWBRIDGE. Morris Canaltype. The draw of the bridge, which is about 25 feet, is manipulatedby hand power. The entire length of the bridge is 55 feet. The prin-ciple of operation is clearly shown in the illustration. The weight ofthe draw being about three tons, two counterbalanced weights are em-ployed weighing 3,000 lb. each, made of cast iron in the shape ofa cylinder, about 3 feet in diameter, and mounted in such a way as tobe rotatable on their axes. These weights run in tracks which are.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
