US231530A

US231530A - Stone-crusher

Info

Publication number: US231530A
Authority: US
Publication date: 1880-08-24
Anticipated expiration: 1897-08-24

Description

O. G. BUCHANAN. Stone OruSher..

No. 231,530. Patented Aug. 24, I880.

fl 1 fl WITNESSES: I 1 VENTOR: W/Qmzm I %J MMW/ BY 7 4. L fig MPEI'ERS, PHOTO-UYHDGRAF'HER, WASHINGTON. D C.

PATENT Gar-ion.

CHARLES Gr. BUCHANAN, OF BROQKLYN, NEW YORK.

.STO'N E- C R US HIER.

SPECIFICATION forming part of Letters Patent No. 231,530, dated August 24, 1880.

Application filed December 12, 1879.

To all whom it may concern:

Be itknown that I, CHARLES G. BUCHANAN, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Stone-Crusher, of which the following is a specification.

Figure 1 is a sectional longitudinal elevation of crusher on line mm, Fig. 2. Fig. 2 is aplan. Fig. 3 is a transverse section of a portion of the crusher on line 1 3 Fig. 1.

Similar letters indicate like parts.

The object of this invention is to produce a parallel and sliding motion upon the lower portion of the crushing-plates for the purpose of increasing the pressure, and, if desired, reducing the product to a greater degree of fineness.

The invention consists in the combination of fixed or rigid links with two vertical jaws, said jaws pivoted and arranged in such manner that by the application of the link they are made to move together with a relative sliding and parallel motion.

In the drawings, A represents the frame of the machine B, the crank shaft provided with suitable journals, 0 0. Motion is imparted to the jaw-lever D by means of the pitman E.

F F are the two jaws secured to the frame by the shafts G G. The shaft G is fixed, but the shaft G is adjustable by means of the movable boxes H in the frame working in a slide and adjusted by the wedges I, which are in turn secured by set screws K, passing through the lugs m. By means of these wedges and boxes the jaws F F may be adjusted to crush or pulverize to any required size. The jaws F F are provided with removable crushin g jaws or plates L L, that are held in position by the beveled keys a. They are provided with corrugations extending horizontally across their faces, and so arranged that the projection in one fits into a corresponding cavity in the other. The bottoms of these plates are provided with a plane or nearly smooth surface, arranged in such a manner that when the jaws stand in a vertical position the said straight portion of the plate will be at right angles to a line drawn through the center of the shafts that support the jaws.

The links 0 connect the two jaws and transmit the motion from the jaw F to F. It is evident that if the links are secured to the jaws at points on the same horizontal plane, and at equal distances from a line drawn between the jaws when they stand in a relative vertical position, the motion imparted to the jaws from the crank-shaft will produce a sliding parallel motion on the lower portion of the crushing-plates. There is a slight disturbing element that would prevent a perfect parallel motionthat is, the action of the jaw has a tendency to throw the link out of its horizontal position; but the motion of the jaw is so slight and the amount of variation so small that it would be impossible to measure it even in thelargest-sized machine a slightinequality of work would affect the truth of the motion more than the action of the links, so that in practice it can be disregarded entirely.

I am aware that a sliding rubbing motion has been used before, and I do not claim it as a new feature.

The application of rods to the jaws of crushers is not new; but I claim that the use of the links for the purpose specified is original.

Side rods or links have been used, but only in connection with a crank or eccentric, as in the Fowler and Wagner crusher and others. The links or rods are used in these crushers for the purpose of causing the jaws to advance and recede from each other, thus producing a positive crushing motion, while the links in my invention are to prevent them from ap proaching and to keep the jaws at afixed distance apart. Links have also been used to strengthen the machine and have been applied as braces or tension-rods.

It is well known that the tensile strength of minerals is only about one-tenth of its resistance to compression.

By the action of the jaws of this crusher the mineral is subjected to a torsional and shearing strain, thus aflilying the power in such a manner that the mineral offers the least possible resistance to fracture. By the use of this motion one machine is capable of doing every class of work-such as crushing stone for macadamized roads, &c., or for pulverizing ores.

Having thus described my invention, I lower supporting-pivots of said jaws, when the claim as new and desire to secure by Letters faces of said jaws are equidistant from a ver- Patent-- tical line projected upward from the central In a stone-crusher, as a means for holding point between said supporting-pivots, as set 5 the crushing-jaws always at nearly the same forth.

distance apart, and at the same time causing CHAS. G. BUCHANAN. them to move in the samedirection when in 0p eration, the rigid links 0 O, pivoted to the up- \Vituesses:

per ends of saidjaws parallel with a horizontal I. I. STORER,

10 line drawn between and centrally through the (J. SEDGWICK.