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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 337

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 337
ED 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… … laid in an ellipse on an inclined framework extending from near the topof the central framework to the level of the roadway of the bridge.Wire cables connect the counterbalance weights with the free end of thedraw, the cable passing once around the pulleys at the top of the frame-work. The pulleys…

Mechanical movements

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