. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . ? ? ^^^^^H^l :-^:.jmi» ml/i V ^^^H ^?^1 PL ..„;..3!!5-:*!!»1 - « ^H It 1 ft 1 1 Structural Steel A-Frame Top with Chain Topping-LiftConnection Structural Steel A-Frame Top with Single-Sheave Roosterand Chain Topping-Lift Connection. Cast Steel Mast Base and Step withSteel Boom Heel and Sheave Cast Two-Piece Cast Steel Base with Steel Plate Mast Connection Cast Steel Mast BottomDouble Step and DERRICKS 229 pipe, setting monume
. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . ? ? ^^^^^H^l :-^:.jmi» ml/i V ^^^H ^?^1 PL ..„;..3!!5-:*!!»1 - « ^H It 1 ft 1 1 Structural Steel A-Frame Top with Chain Topping-LiftConnection Structural Steel A-Frame Top with Single-Sheave Roosterand Chain Topping-Lift Connection. Cast Steel Mast Base and Step withSteel Boom Heel and Sheave Cast Two-Piece Cast Steel Base with Steel Plate Mast Connection Cast Steel Mast BottomDouble Step and DERRICKS 229 pipe, setting monuments, digging trenches and work of asimilar character. This derrick has a small winch on the pole and is oper-ated by hand. The height of such derricks ranges from12 ft. to 14 ft. and in capacities upward to 2 tons. Sulky Derrick A light capacity derrick known as the sulky derrick isused in much the same manner as a tripod derrick. Fourpoles are mounted on two wheels and may be moved fromplace to place by resting the wheels on the ground andfolding the poles on the axle. When erected for use, thepoles form a rectangular pyramid secured at the apex bya bolt. A means of suspending tackle is provided and thehoisting line passes from the block to a winch secured totwo of the poles near the base. The winch gear mesheswith a pinion on the sulky axle and is operated by turningthe sulky wheel. Derrick
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjecthoistingmachinery
