. American engineer . Truck Crane of One Ton Capacity. plate. The actuating screw swings the quadrant by means of anut which slides on a guide on the top part of the frame. For. Compensating Quadrant Crane. to allow the load to be swung in and out without change in itslevel is illustrated herewitii. The compensating quadrant crane is of the derrick type, withthe jib securely fastened at its lower end to two quadrants; inthe smaller cranes the jib and the quadrant are cast in onepiece. The quadrant is provided with a finished rolling surfaceand teeth that engage in a rack and roll in a slot on
. American engineer . Truck Crane of One Ton Capacity. plate. The actuating screw swings the quadrant by means of anut which slides on a guide on the top part of the frame. For. Compensating Quadrant Crane. to allow the load to be swung in and out without change in itslevel is illustrated herewitii. The compensating quadrant crane is of the derrick type, withthe jib securely fastened at its lower end to two quadrants; inthe smaller cranes the jib and the quadrant are cast in onepiece. The quadrant is provided with a finished rolling surfaceand teeth that engage in a rack and roll in a slot on the bottom slewing, the bottom plate is provided with four rollers that rollon a beveled flange on the post plate. There are two different compensating devices. The first isobtained by the use of two parallel links pivoted at one end nearthe top of the jib, and at the other end holding two sheaves overwhich the hoisting ropes run. This end of the links is held bya chain that runs over the sheave at the top of the jib. and is 456 RAILWAY AGE GAZETTE, MECHANICAL EDITION. Vol. 87, No. 8. connected by means of a rod with a three-arm dog pivoted atthe top of the back frame. T
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
