US230304A - Stone-crusher - Google Patents

Description

UITED STATES PATENT v trio SAMUEL L. MARSDEN, OF HAVEN, CONNECTICUT.

STONE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 230,304, dated July 20, 1880.

Application filed October 14, 1879.

To, all whom it may concern:

Be it known that I, SAMUEL L. MARSDEN, of New Haven, in the county of New Haven and State of Connecticut, have invented a new and Improved Stone and Ore Crusher, of which the following is a specification.

Figure l is a sectional longitudinal elevation on line a a, Fig. 2. Fig. 2 is atransverse sectional elevation on line y y, Fig. 1. Fig. 3 is a transverse sectional elevation on line 2 2, Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention relates to that class of crushers which operate with a reciprocating moving jaw or jaws.

The invention consists in constructing a vertical-j awed ore-crusher with an adjustable pitman, friction driving-pulleys, toggle-lever, toggle, and jaw-plates, as hereinafter set forth, so as to increase the efficiency, durability, and convenience of the machine.

In the drawings, A represents the crusherframe, and B the crank-shaft, supported in the journal-boxes'C C, and carrying on one end the fly-wheel D and on the other end the flywheel D and the friction driving-pulley E, which latter is thrown in gear with the flywheel D by means of the screw F,and thrown out of gear, so as to run as a loose pulley, by loosening the said screw F.

Stone and ore crushers have been run with a fast and a loose pulley on the crusher-shaft and a pulley of corresponding width on the engine or driving shaft; but such device is more expensive and absorbs more power and is less compact and convenient than the arrangement herein shown.

G is the rigidly adjustable pitman that con.- nects the crank-shaft B with the lever-toggle H, and through or by which the motion of the said crank-shaft B is transmitted to the oper ating part of the crusher.

In the lever pattern, Blakes crusher, the only adjustable part by which the distance between the jaws at the bottom can be regulated is a wedge operated by a screw-nut that can be raised or lowered between the crusher-frame and the rear toggle-block, so that it can move said toggle-block forward or back an inch, or thereabout; but this limited the lever-bearing hence some of these parts in some instances require frequent renewal in order to restore the crusher to its normal workin g condition.

- In a more recent pattern of Blakes crusher a like wedge fixed between the frame and the toggle-block is the chief agent for the adj ustment of the wearing parts.

In neither of these cases is the pitman of the crusher adjustable in relation to any of the wearing parts named, it being adjustable only by means of a beveled key or keys, that may be made to move the crusher-journal brasses as they wear under the action of the crankshaft.

The adjustable pitman G herein shown is composed of two parts that screw together, so that it can be made longer or shorter at will, and at the same time always preserve the absolute rigidity that is essential to the proper working of the crusher. To compensate at any time for the wear on the wearing parts of the crusher the two parts of this pitman G may be partially unscrewed from each other, and when the worn parts of the crusher are renewed the pitman may be shortened by screwing together its parts to its primary condition.

H is the toggle-lever, whose long horizontal arm is connected to the crank-shaft B by the .pitman G. A pin, a, that passes through the slotted holes b in the sides of the crusherframe A and through the ear 0 of the leverH itself, forms, in combination with the toggleblock I, the fulcrum of the said lever H. In the face of the enlarged head of the toggle-lever H is a deep horizontal groove, d, having outward-curving edges, and opposite, in the back of the movable jaw K, is a similar groove, f. Set between the head of the lever H and the movable jaw K, and with an end resting in each groove (1 f, is the toggle L.

K is the movable jaw, that swings on a shalt, N, which rests in the boxes 0 on the sides of the frame A. p

1? is the fixed jaw, that is secured to the frameA. I

Q Q are the removable jaw-plates between which the ore or other substance is crushed.

The plate Q is held in place partly by the studs g, that project from the movable jaw K, and partly by the screw-bolt it, while the plate Q is held in place by the cheek-plates R R and the studs 9, that project from the jaw P and enter the inclined sockets t 2'. These sockets t t" are intended to be inclined in both plates in opposite directions, so that they will serve the purposes for which they are designed whichever end of the plates Q, Q be set uppermost in the crusher. The purposes of these sockets i t" are primarily to assist in securing the plates Q Q in position, and, secondly, to afford good holds for hooks that may be inserted to lift the said plates to or from their positions. By these means the plates Q Q, can be set in place or removed without the usual risk of accident.

T is a wedge, vertically movable by means of the thumbscrew k, for the purpose of ad justing the toggle-block I, to compensate in a measure for the wear on the wearing part of the crusher.

In many of the crushersnowin usein which motion is given to the movable jaw through the medium of togglcsit will be observed that the said toggles areneverbronghtin a straight line with each other at any partof the stroke, and that consequently the full power of the applied force is notdeveloped. In the crusher herein described, however, the toggleis thrust straight out in a horizontal line at the end of the stroke, so that a most positive and unyielding pressure is exerted by the movable jaw K upon the material to be crushed. The spring S serves to retract the jaw K after every forward motion.

In other crushers the toggles are never in a straight horizontal line when they exert their maximum force; hence at that instant a severe backward thrust or pressure is always transmitted to the crankshaft as it is on a deadpoint, turning the center, thereby causing undue strain and wear upon the bearing points of the said crank-shaft, as well as upon the bearings of the attached pitman. In this improved machine, however, when the crankshaft is on a center and the toggle is simultaneously exerting its greatest force the said toggle is in a straight horizontal line, so that no back pressure or thrust is at that moment transmitted to the bearings of the pitman or shaft. (Jonsequen tlythe ordinary wearand distortion of these points is in a great measure avoided.

I do not claim, broadly, an adjustable pitman for a stone-breaker.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In an ore-crusher or stone-breaker, the adjustable pitman Gr, constructed in two parts that screw together, in combination with the crank-shaft B, lever B, and toggle L, sub stantially as herein shown, and for the purpose described.

2. The toggle-lever .lI, having an enlarged head with ear 0 and groove (1, in combination with the toggle-block l, toggle L, and movablejaw K, all constructed and arranged as shown and described.

3. In an ore-crusher, the movable plates Q, Q, provided with inclined sockets it, in combination with the crusherjaws, substantially as and for the purposes described.

SAMUEL LOlVE MARSDEN.

Witnesses:

1:. I. STORER, (J. SEDGWIGK.

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