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Publication numberUS427441 A
Publication typeGrant
Publication dateMay 6, 1890
Filing dateOct 1, 1889
Publication numberUS 427441 A, US 427441A, US-A-427441, US427441 A, US427441A
InventorsD. Roth
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 427441 A
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Description  (OCR text may contain errors)

(No Model.)


No. 427.441. Patented May 6, 1890 NrrEn Srarss Fannr FFICE.



SPECIFICATION forming part of Letters Patent No. 427,441, dated May 6,1890.

Application filed October 1, 1889. fierial No. 325,679. (No model.)

To aZZ whom, it may concern.-

Be it known that I, ELIAS D. ROTH, a citizen of the United States, residing at Fort Collins, in the county of Larimer and State of Colorado, have invented certain new and useful Improvements in Ore-Crushers, of which the following is a specification, reference being had therein to the accompanying drawlugs.

My invention relates to ore crushing or pulverizing apparatus, and has for its object the production of a device of this character which shall effect most perfectly the reduction of the ore or other substance to be crushed, and whose working parts, while possessing all necessary strength and rigidit shall be capable of ready and easy adjustment when occasion shall require, either to compensate for wear or for other purposes.

To these ends my invention consists in the apparatus constructed and operating as hereinafter described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of my apparatus, and Fig. 2 a vertical section.

In carrying my invention into practice I employ duplicate crushin g-j aws A A arranged in line with each otherand pivoted each near its lower end upon pins or studs a a, which pass entirely through them and through open ings in plates 13 B, between which said jaws are placed, constituting therefor a casing which substantially incloses them on their sides. The openings in the side plates'B B, through which the pivotal pins to a pass, are slightly enlarged horizontally, as shown in dot-ted lines in Fig. 2, to permit'of the adjustment of the jaws, as hereinafter set forth. These crusherjaws consist of long vertically-arranged bars, constructed of any metal suitable for the work to he demanded of them, whose adjacent faces are set at an angle to each other, approaching nearest together, so

as to almost touch, at a point in line with the pivot-studs, from which point they diverge, as shown. Upon said adjacent faces, which are the ones designed to engage with and re duce the ore, are provided grooves or corrugations, which commence at or near the top of the jaws, where they are largest, and extend downward, gradually decreasing in size until they entirely cease, at or near the point where said faces approach nearest to each other. From the point where said teeth or serrations cease the faces of the jaws are curved on an are centered at their pivotal points, so as to form approximately quadrants a a. The curved or quadrant portions of said jaws engage or are seated in similarlyshaped surfaces 0 c,formed in the upper faces of the base or mortar O, which latter may be supported in any suitable manner.

The jaws A A at their upper ends are connected to parallel bars D D, arranged one each on the outside thereof, and to portions of said bars projecting beyond said jaws is attached an arm or bar E, engaged by an cecentric F or other suitable means for causing a reciprocation. of the bars D D and a consequent oscillation or rocking of the jaws A A, requisite for the proper performance of their functions.

Located between and supported by the bars D D, so as to move with them, is a hopper G, whose discharge end is directly over the space between the crusher-jaws. By thus arranging and supporting the hopper there will be little or no danger of the ore or other substance placed therein clogging or choking it up, as the constant motion it will receive from the reciprocat-ions of the bars D D will facili tale a ready discharge into the space between the crusher-j aws.

The means I employ for adjustment of the jaws when occasion therefor arises, as when the rubbing parts become worn, consist of two diagonally-arranged fiat bars If H, arranged on each side of my apparatus outside of the casing-plates B B, which have in their upper ends openings for the reception of portions of the pivot-studs ad, which project beyond the casing sides for this purpose. At their lower ends 7L it said bars are made cylindrical and passed through lugs or bosses c c, which are formed upon and project from the sides of the mortar or base O. The cylindrical ends or bolts h h are screw-threaded and have placed upon them on each side of the lugs c 0 nuts 2' i, which serve to secure the jaws at the desired adjustment, while for additional security and strength bars K K are employed to connect said jaws by having books 7; 7o at each end in engagement with the up per pivot engaging portions of the bars H H. A bolt or screw 1, tapped through one or both of the hooks 7a and bearing against the pivot or stud surrounding portion of the bars H, serves also to both adjust the jaws toward each other and to aid in holding them when adjusted; A bolt m, passing through the bars H H where they cross each other, aids in further strengthening the latter, the openings in them through which said bolt passes being elongated, as shown, to permit their adjustment.

I prefer that the surfaces which come into contact with the matter to be reduced and with each other-as, for instance, the faces a a and a a of the jawsA A, and the seats cc, receiving their lower quadrant-shaped endsshall be made of some hard, wear-resisting metal or material, such as chilled or hardened steel or the like, as is indicated in the drawings; but I do not of course limit myself to any such special construction, as such may be varied without departure from my in vention.

The operation of my device is as follows: Ore or other matter to be reduced is placed into the hopper G, from whence it passes down into the space between the jaws A A, being aided 'in such passage by the motion communicated to it from the bars D D, on which said hopper is placed. The lumps, if they be large, will be first engaged by the large teeth or serrations 011 the faces of the jaws and then gradually forced downward, all the while being ground smaller and smaller, until eventually passing from between the jaws and engaged by the convex quadrantshaped portions thereof and their concave bearing-surfaces, the matter will be thoroughly pulverized, being thus reduced to a condition which, if the material be ore, will render possible the extraction of a large percentage of the metal therefrom. The movement of the crusher-jaws is a simultaneous rocking one inthe same direction; but, as will be apparent, while the crushing-surface of one is moving downward the crushing-surface of the other is moving upward, so that, owing to the fact that such surfaces are arranged at an angle to each other, there will result a powerful Wedging action on any substance between them. Upon leaving the crushing and pulverizing mechanism the product may be discharged into a pan M or other suitable receptacle, and from thence removed by an opening or pipe m in the center of its bottom or in any other convenient manner.

By the use of my apparatus the reduction of ore may be easily accomplished, because the position of the pivots or fulcra of the jaws with relation to the point where the power is applied to rock or oscillate them is such that a most powerful leverage is obtained.

One of the most important features of my invention is the provision on the crusher-jaws of the convex grinding or triturating surfaces and the correspondingly-curved surfaces in the base or mortar operating in conjunction therewith, whereby-a thorough pulverization and scouring of ore after passing from between the jaws is effected. In sub ecting some ores to this rubbing or scourlng process it is necessary, in order to obtain the so that the matter shall pass directly from between the straight faces of the crusher-jaws into the pan M. I

Having thus described my invention, what I claim is- 1. In an ore-crusher, the combination,with the crushing-jaws and mechanism for simultaneously vibrating the same, said jaws being pivoted near their lower ends in a suitable casing, of the convex grinding-surfaces and the stationary concave grinding-surfaces abutting against the same, substantially as and for the purposes specified.

2. The combination, in an ore-crusher, of the crushing-jaws pivoted near their lower ends within a suitable casing and provided with crushing and grinding surfaces, the lat.- ter working against stationary grinding-surfaces secured to the casing, the pivotal pins of the crushing-jaws passing through slots or openings in the casing, and the connectingarms and adjusting mechanism connected with the pivotal pins, whereby the jaws may be adjusted to compensate for the wear of the respective crushingand grinding surfaces, substantially as specified.

3. The combination, in an ore-crusher, of the crushing-jaws pivoted near their lower ends within a suitable casing and having crushing and grinding surfaces, as described, the bars connecting the upper ends of the jaws, the hopper located between said bars and adapted to move with them, and mechanism whereby the jaws and the hopper are simultaneou sly vibrated, substantially as specified.

4. The combination, with the crushing-jaws A, their pivotal pins a, extending through elongated slots in the sides of the casing B, of

the bars H, havingintersecting slots and connecting-bolt m, the lugs or bosses 0, through which the ends of the bars H pass, and the nuts 1', whereby the bars are adjusted to adjust the jaws to compensate for the wear of their parts, substantially as specified.

5. The combination,with the crushingjaws A, their pivotal pins a and adj listing-bars H, of the connecting-bar K, setting at its ends over the ends of the pivotal pins a, substantially as and for the purposes specified.

In testimony whereof Iaffix my signature in presence of two witnesses.

ELIAS D. ROTH. WVitnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2707081 *Jan 3, 1951Apr 26, 1955Koppers Co IncOpposed jaw granulator
US4679742 *Nov 18, 1985Jul 14, 1987Ian Gordon RodgerCrusher having opposed and balanced driver jaws
Cooperative ClassificationB02C1/005