. Mining and Scientific Press . which was led with a bearing on the inside for the tail end of tin- inner shaft. This is a dis-tinctive feature of the machines uow in use. The twopulleys are driven in opposite directions; the improve-ment in crushing is such that it is possible to main pulley at a much lower speed than formerly, bearings, all of which are lubricated by means of circu-lating oil delivered by a pump (19); the stream of oillub ates the eccentric bearings (8) of the innershaft. Adjustment shims are provided (30 to 35A) toregul lie size of the producl or to compensate
. Mining and Scientific Press . which was led with a bearing on the inside for the tail end of tin- inner shaft. This is a dis-tinctive feature of the machines uow in use. The twopulleys are driven in opposite directions; the improve-ment in crushing is such that it is possible to main pulley at a much lower speed than formerly, bearings, all of which are lubricated by means of circu-lating oil delivered by a pump (19); the stream of oillub ates the eccentric bearings (8) of the innershaft. Adjustment shims are provided (30 to 35A) toregul lie size of the producl or to compensate for .; of the diSCS. The OUter disc is held in position by Hi- ring-nut I 67 ; the inner disc is secured to theinner shaft, as shown in Fig. 3. A screw is used to lockock a ratchet. In the illustration the inner diseis shown ia place, but the ratchet set-screw is in theposition in which it is possible to remove the ratchet-By unscrewing the Bet-screw (68) the springbrings the ratchets together until they engage, so that &==. _«*>- -*rtr^ i?-jc Flo. 1. THE ORIGINAL DISC-CRUSHER, KNOWN AS THE SYMONS SAND MACHINE and to obtain great r crushing results and avoid exces-sive ? By referring to the accompanying drawing (Fig. 2), it will In- seen that, at tin- extreme left, tin- pulley has an eccentric huh, by which a lateral motion is given to th- inner shaft (28). This is connected with the inner 24 . which is attached to a cast-iron babbitted hall behind a special ball-and-socket, bearing. The main I and the strain incidental thereto are suatin- ball-and-socket bearing, for which a largeOtion can In- eliminated by! I ? outer shaft, which is re volved by a 15), operates in the same direction and at thi the inner shaft; it coin ts. by and lock-nuts | 77 w - it li the outer disc 23 . in tl ? centre of which a delivery-spout .his shaft is supported by appropriate tin disc and ratchet-screw cannot turn when the crusheron. The discs are given an even support bymeans of a bed of zinc, w
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