. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . er nut has a left handthread. Rotating the worm shaft, which is held against end-wise movement by the handwheel, causes one nut to moveaway from the handwheel, the other towards it. Theextended ends of the two nuts bear- against a rockingarm integral with or attached to the pitman shaft, thusactuating the pitman arm. This type of gear is adjustablefor wear by forcing the thrust bearing axially closer tothe split nuts. (C) The
. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . er nut has a left handthread. Rotating the worm shaft, which is held against end-wise movement by the handwheel, causes one nut to moveaway from the handwheel, the other towards it. Theextended ends of the two nuts bear- against a rockingarm integral with or attached to the pitman shaft, thusactuating the pitman arm. This type of gear is adjustablefor wear by forcing the thrust bearing axially closer tothe split nuts. (C) The worm and full nut type of gear uses a wormwith only a single set of threads—either right hand orleft hand. Rotating the worm (by the handwheel) causes the nutto move up or down on the shaft. By means of a sliding block, or pair of blocks, the nut bears against arras ortrunnions formed on the pitman shaft, causing it to oscillate,hence moving the pitman arm. (D) The bevel pinion and sector type of gear has abevel pinion fastened at or near the lower end of thesteering shaft, and meshing with a section of a bevelgear of much larger diameter. Turning the handwheel.
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjecthoistingmachinery
