USRE9095E - Hoisting-m ach i ne - Google Patents

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• My invention consists in the construction of the means for swinging the crane, and also various details about the machine.
• Fig. l is a perspective view of the hoisting-machine.
• Fig. 2 is a horizontal section through the axis of the shafts.
• Fig. 3 is a transverse vertical section on the linear to, Fig. 2, and shows the parts beyond in elevation.
• Fig. 4 is a transverse vertical section of a journal-box on the line y 3 Fig. 2.
• a A A represent a frame-work.
• B B B represent the crane.
• O G are the drums, and c the chain by which the crane is swung.
• D is the main hoisting-drum or windl'ass.
• D is the bucket or object to be raised, and d is the hoistin'g chain.
• the main shaft of the machine or the one which communicates with the engine, is marked G. All the other parts of the machine receive their motion from the shaft G. I provide friction-wheels for communicating this motion.
• the friction-w heel G operatesupon the friction- -wheel G,'which revolves the shaft H, which so shaftllis journaledin aswiveled journal-box,
• the shaft H is always in gear with the windlass D by the wheels F F, and hence the wheel G revolves, whether the object D is being hoisted or lowered; and the lever h can throw the wheel G" against the dead friction-block 0, as well as against the live friction-wheel G. So the operator at the lever ,h can regulate the speed of thedownward movement as easily as he can throw the machinein gear for hoistin g.
• the device for turning the crane consists of a drum or pulley, O, on the mast or post B, a drum or winch, C, and an endless chain, 0, connecting the two.
• This device is operated by being. connected with the shaft G by a friction device, which is constructed and operates as follows:
• the winch 0 receives its motion directly from a shaft, i, which is parallel with it, and is provided with'a pinion, J, which gears into another pinion, J, on the winch.
• the opposite end of the shaft 6 is provided with a conical friction-wheel, I.
• the shaft G is provided with two cones, I I, which are joined so as to form one solid spool, the two frustums having their small ends toward each other.
• This device by a spline-and-groove arrangement, slides on the shaft G and revolves with it.
• the shaft G, on which the friction-gears G and I I are placed, is, in eflect, an extension ofthe shaft of the engine which ,propels the hoisting-machine.
• the swinging drum 0 can be thrown into operation at any time without shutting down the operator can raise and swing; or lower and swing, or'raisc or s ving alone, at pleasure, without altering the speed or reversing theengin'e.

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