US321834A - Dowell - Google Patents

Description

(No Model.)

12H. MGDOWBLL. ROCK AND ORB CRUSEER.

Patented July 7, 1885..

UNITED STATES PATENT OEEICE- FREDERICK H. MCDOWELL, OF BROOKLYN, NEV YORK.

ROCK AND one cRUsHER'.

rECIFICATION forming part 0f Letters Patent No. 321,834, dated July 7, 1885.

Application tiled September 8, 1884. (No model.)

To all whom, it may concern:

Be it known that I, FREDERICK H. AMC- DOWELL, of Brooklyn, Kings county, in the State of New York, have invented certain new and useful Improvements in Rock and Ore Crushers, of which the following is a specification.

The machine has two jaws moved simultaneously in opposite directions by a single actuating crank. The force is applied through toggle-levers, one of which acts directly on one jaw, and the other acts'indirectly on the other jaw through a stout yoke embracing the framing. The pitman which actuates the toggle is guided. After each crushing action the jaws are returned to their original positions by a sufficient spring force.

Inrwhat I esteem the most complete form of the invention the two moving jaws are mounted at a considerable distance apart, and there is an intermediate stationary j aw or part between them.

The accompanying drawings form a part of this specification, and represent what I consider the best means of carrying out the invention.

Figure l is a central vertical section of my improved crusher. Fig. 2 is a plan view, partly in horizontal section, of the same.

Similar letters of reference indicate corresponding parts in the figures.

A is a rigid frame-work of castiron or other suitable material, certain portions being designated by additional letters, as A A2. The highest portions, A', of the framing A form .bearings for a horizontal shaft, B, carrying a fly-wheel, B', and a broad eccentric, B2. The latter operates a pitman, O, the lower end of which is provided with trunnions c, which engage in blocks D, each tted to move tight and easy in a vertical groove, a, in the framing A.

G and H are stout jaws,mounted in reverse positions relatively to each other, and fitted with shafts g l1, supported in bearing-blocks A3 A4, mounted in the framingA, as described further on. The jaw G has an arm, G', and the jaw H has an arm, H. Both these arms extend downward, and are subject to a strong contractile force from rubber 'springs or analogous springs J mounted on a longitudinal bar or tie-rod, I. These springs J exert a force tending to draw together the arms G H', and consequently to throw apart the jaws G and H, which are above the shafts g h.

M and N are broad castings, serving as toggle-levers. One end of each abuts against a bearingblock, C', of chilled iron, hardened steel, or other suitable material set in the adjacent face of the pitman G. The outer end of the toggle-lever M bears against a corresponding bearing-block, G, on the back of the jaw G. The outer end of the toggle-lever N bears against a corresponding bearing block, E', fixed in a cross-head, E. This portion E carries two stout horizontal rods, E2, which are tted to work endwise through corresponding apertures formed in the framing A. The other ends of the rods E2 are engaged by nuts E3 with a stout cross-head, E. This latter acts by a bearing block, E5, against a bearingblock, H2, on the jaw H.

The wheel B is on an overhanging portion of the shaft B at the back side of the machine. The shaft B overhangs to astill greater eX- tent on the front side of the machine, as indicated in dotted lines in Fig. A2. It carries another fly-wheel, B3, and also a fast pulley, B, and a loose pulley, B5. (Shown in dotted lines.) A belt from a steam-engine or other suitable power (not represented) runs on the fast pulley B4 and rotates the shaft, which by the eccentric B2 works the pitman G up and down, the lower end being guided in a strictly vertical path by the blocks D. At each descent the toggle-lever M thrusts the jaw Gto the left, and the toggle-lever N thrusts the crosshead E, and consequently the connected jaw H, to the right. motion of the jaws G and H toward each other is produced at each descent of the pitman C. At each ascent of the pitman the springs J assert themselves, and by acting on the arms G H open the jaws G H.

A2 is a stout cross-piece, stationary bar, or dead-block iixed in the framing of the machine, and partly filling the space between the jaws G and H. The inner sides of G and H are faced with chilled-iron or steel crushing-plates g h. The adjacent faces ofthe trans- Thus a simultaneous closing IOOv verse frame-piece A2 are similarly faced with chilled iron or steel a a2. The acting-faces y It a" a2 are inclined, as shown, to favor the reception and crushing of ore or rock, which is supplied by the attendantin the space between the jaws G and H above the framing A2, as will be understood.

The shafts g 7L of the movable jaws have bearings in blocks A3 and A4, which are mounted in horizontal slots upon either side of the machine. A single binder, A5, extends entirely across the machine, and bolts A6 and nuts A7 serve to confine the whole together. Each bolt AG may extend through the framing and be equipped with a stout head or nut outside; or it may be tapped or otherwise secured in the framing. This portion ofthe apparatus should be able to resist great strains, as will be obvious.

The ends of the transverse framing A2 may be allowed a little play between the blocks A3 A2 at each end; or it may be held tightly in the blocks, as the engineer may prefer. If loose, it will shift itself tothe right and left to small extents, according as the quantity of the material or the hardness in one side or the other shall be in excess when the jaws G H partially close by the descent of the pitman C. The fresh quantity of ore or other material to be crushed descends between the acting-faces at each opening of the jaws, and the quantity thus received at each side of the piece A2 will be about equal.

Modifications may be made in the forms and proportions within wide limits.

The crushing-faces g h a a2 may be, and under ordinary circumstances preferably are, ridged horizontally, to better retain any round smooth lump which might otherwise tend to escape by sliding upward when the jaws come together.

The framing may be varied in form. The blocks A A4, which form bearings for the shafts g h, may be deeper or wider. Various means may be employed, as wedges or other obvious devices, for adjusting these parts at various distances apart. The binder A5, and its securing bolts and nuts A A7, may be made much heavier than here shown. It is important that all the parts be simple in construction and adjustment, so that the ma chine can be adjusted and operated safely and worked successfully by unskilled labor.

The intermediate cross-frame, A2, between the jaws may be omitted; but in such case the jaws should be worked nearer together. In such case those blocks should each be recessed, like the blocks G2 E', to afford a nearly or quite semi-cylindrical pocket for the correspondingly-formed ends of the toggle.

I can extend down more than one arm from each jaw, G H. I can employ more than one tie-rod I and more than one pair of springs J. I can, if desired, in any case use only one spring, J, on one end of the rod I, its action being by the rod I made effective on both jaws. I prefer a single rod, I, and two springs, J, as shown. j

The bearing-blocks G2 H2 are bedded in the respective jaws G H, on a layer of elastic materia-l, G3 H2. I have in my experiments made this elastic material of soft vulcanized rubber; but I believe I can use felt or a series of plates of thin metal, some or all of which shall be corrugated.

My binder A5 is V-shaped on the face which is presented toward the parts A2 A3 A4. This allows the binder to rock slightly if the nuts A7 should be adjusted unequally. The force with which the shafts g 7i are held together depends on the strength of the bolts A2. These should, as before stated, be strong, but they will necessarily constitute the weakest portion, and in case a Sledge-hammer or other object is through malice or accident inserted in the machine, the machine will yield by the fracture simply of these bolts A, thus letting the pieces A2 A3 A4 move apart. This is of advantage, by saving the more costly parts of the machine from fracture. The introduction of new bolts A6. can be effected in a short period, and the machine will then be ready to go on again as before.

I claim as my inventionl. In a rock and ore Crusher, the combination, with a stationary jaw, as A2, having beveled faces, of two movable jaws, as G H, arranged one upon either side of the stationary jaw, and means, as described, for operating said jaws simultaneously in opposite directions, as set forth.

2. In a rock and ore crusher, the pitman C, guided at its lower end, substantially as shown, in combination. with the toggles M N, frame E E2 E, jaws G H, and stationary jaw A2, arranged for joint operation, substantially as herein specified.

3. In a rock and ore crusher, the jaws G H, with their respective arms G H, operating means, as B C M N, and yoke E E2 E2, in combination with each other and withl the tensionrods I and springs J, arranged for joint operation, as herein specified.

4. In a rock and ore crusher, the bearingblocks G2 H2 and stationary jaw A2, in combination with the jaws G H, their operating means, the stout framing A, binder A5, bolts A, and nuts A2, arranged for joint operation, substantially as herein specified.

In testimony whereof I have hereunto set my hand, at New York city, New York, this 6th day of September, 1884, in the presence of two subscribing witnesses.

FREDERICK H. MCDOVELL.

Vitnesses:

CHARLES R. SEARLE, J. E. RENWHE.

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