US121143A - Improvement in stone-crushers - Google Patents

Description

Patented Nov. 21, 1871.

Improvement in Stone Crushers.-

1 ETER W000.

UNITED STATES PATENT QFFICE.

PETER WOOD, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT lN STONE-CRUSHERS.

Specification forming part of Letters Patent No. 121,143, dated November 21, 1871.

To all whom it may concern:

Be it known that I, PETER \VOOD, of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Stone- Orusher; and I do hereby declare that the following is a full, clear, and exact description thereof,

. which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification.

Figure 1 represents a vertical longitudinal section of my improved stone-crusher. Fig. 2 is a face view of the movable jaw. Fig. 3 is a face view of the same without the face-plate. Fig. 4, a detail transverse section of the same on the line a c, Fig. 1. Fig. 5 is a side view of the pitman; Fig. 6, an end view of the same; Fig. 7, a detail longitudinal section of part of the vibrating lever; and Fig. 8, a transverse section of the same on the line is is, Fig. 7.

Similar letters of reference indicate corresponding parts.

My invention consists in the improvement of stone-crushers, as hereinafter fully described and subsequently pointed out in the claims.

A in the drawing represents the frame of the ore-crusher. B is the crank-shaft, hung in the back portion of the frame, and receiving rotary motion by suitable mechanism. G is the pitman connecting the crank of the shaft B with the lever D, which, by means of the toggle-levers E, imparts vibrating motion to the jaw F. G is the stationary jaw, and H a spring for drawing the movable jaw away from the jaw G. The general arrangement of these parts, as far as their effect upon one another is concerned, is the same as in Blakes crusher, and not invented by me.

My improvement consists, first, in making the pitman O in two sections, as shown in Figs. 1, 5, and 6. The lower or main section a extends from the lower end up against the crank of the shaft B and receives the cap b placed over said crank. A strap, d, is laid over the cap and fastened to the lower section a by gib and key 0, be ing held in place by a set-screw, f. By this arrangement the unshipping of parts for transportation and other purposes is greatly facilitated. My second improvement consists in providing the lever D with a removable hard-metal fulcrum piece, 9, and with a removable hardened bearing block, h, for the toggle-levers. The fulcrum-piece g is set against the front end of the lever and fastened thereto by boltsi t. Its shape is such as to constitute a double bearing for the lever. The block his fitted into a groove provided in the upper face of the lever, and may be prevented from lateral displacement by suitable means. Finally, my improvement consists in providing the movable jaw F with a removable reversible hard-metal face-plate, I, and in the peculiar arrangement of the latter. The jaw has a recess formed in it, into which'the face-plate I is secured. The lower end of the face-plate rests on a shoulder, j, of this recess. Its upper end, however, abuts against a strip, 1, fitted into the upper part of the recess and fastened to the jaw by bolts m. The upper and lower edges of the face-plate being both beveled, it is thus held in place without the use of fastening-bolts, pins, or devices applied directly to or through it. The face of the plate I is corrugated to present rounded shallow grooves and ribs, as shown in Fig. 4, whereby pressure surface is enlarged. The edges n a of the plate are quite sharp, and fit flush against the checks of the frame to prevent stones or dust from working between. The lower part of the grooved face is somewhat beveled to enlarge the lower point of contact and greatest pressure. On top the plate I has a similar form, so that it may be reversed when worn at the lower end. When entirely worn the plate I can be removed from the jaw'and replaced by another. The back of the plate I and the face of the recess in the jaw F are both grooved, as-

indicated in Figs. 3 and 4. Soft metal is cast into these grooves and allowed to flow along the entire back of the plate I for properly setting the same. 0 is a removable hard-metal block fitted into a groove in the back of the jaw F for the toggle-levers to bear against.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The jaw F, having recess for the face-plate beveled at j, combined as described, with a beveled strip, L, and bolts m to embody a new mode of attaching the face-plate to the jaw.

2. The back-grooved face-plate I and frontgrooved jaw F, combined with the soft-metal filling cast therein, as and for the purpose specified.

The above specification of my invention signed by me this 19th day of July, 1871.

Witnesses: PETER WOOD.

GEORGE W. MABEE, T. B. MosHER. (3)

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