GB240699A - Improvements relating to crushing machines - Google Patents

Abstract

240,699. Symons, E. Jan. 21, 1925. Disc mills.-Relates to crushing-machines of the disc type in which means is provided for preventing breakage of the opposed discs in the event of an uncrushable material passing between the discs. The machine comprises a rotary solid shaft within a rotary hollow shaft, opposed crushing-discs carried by the shafts, and spring releasemeans to permit relative axial movement of the discs. The machine shown is of the type in whinh a lenticular crushing-space is defined by two opposed rotating cupped crushing-discs. The inner crushing-disc C is carried by a ball member B<1> on the end of a. solid shaft B which passes through and is inclined to the hollow shaft A that carries the outer crushing-disc G<1>. A ring member D<1> positioned against the outer corner D of the flange A<3> of the socket member A<1> carried by the shaft A has a flange D<2> to limit its movement towards the crushing-zone, and spiral springs D<4> are mounted in pairs on outwardly-projecting abutments of the ring D<1>. An angle-member D<5> abuts at its inner edge against the inner corner of the flange A<3>. The outer disc G<1> is secured to a member G carried by bolts E which pass through the member D<5> and engage cylindrical members H<2> of the outer abutment H<1> for the springs D<4>. The abutment H<1> projects inwardly from a ring H slidable along the member D' and preferably out of contact with it. Spacing-devices E<1> are provided on the bolts E between the member D<5> and a ring E<2>, and removable shims E<3> between the ring E<2> and the flange G<5> of the member G. A stop-ring J bolted to the member D<1> limits the outward movement of the ring H. If a piece of iron &c. passes between the discs, it will overcome the tension of the springs D', thereby separating the discs so that it can pass between them. The disc G' is secured by a locking-ring G<2> which is screwed externally to engage a locking-ring G<3>.