US419256A - Frank a - Google Patents

Description

P. A. HUNTINGTON.

(No Model.)

GRUSHING MILL.

No. 419,256. Patented Jan. 14,1890.

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UNITED STATES PATENT OFFICE.

FRANK A. HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

CRUSHlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 419,256, dated January 14, 1890.

Application filed April 14, 188B. $erial No. 270,649. (No model.) i

To all whom it may concern.-

Be it known that I, FRANK A. HUNTINGTON, of the city and county of San Francisco, State of California, have invented an Improvement in Crushing-Mills; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to improvements in' that class of crushing-mills in which a vibrating or oscillating jaw operates in conjunction with a cylinder, between which and the jaw the rock is crushed or broken; and my invention consists in the constructions and combinations of devices which I shall hereinafter fully describe and claim.

Figure l is a side elevation of the machine with a part of the casing broken away, and showing the hopper and driving-shaft in section. Fig. 2 is a detail showing a part of thrust-bearing for the lower end of the jaw.

G is an elastic rubber or other spring connected with the jaw by the rod H, so as to keep the lower end of the jaw in contact with the toggle E without the necessity of making a cap or box to hold the latter in place. The face of the jaw which is adjacent to the periphery of the roller is curved,

as shown, into an arc of much larger radius than that of the cylinder, and is also provided with a heavy removable wearing-die I. The upper end of the oscillating jaw is sup ported upon an adjustable eccentric upon the driving-shaft J, so that when this shaft is rotated the action of the eccentric Will cause a rotary motion of the upper part of the jaw in the direction shown by the arrow, and thus cause the jaw to alternately ad- Vance toward and recede from the face of the cylinder. The lower end of the jaw is ad justed to or from the roller or cylinder by inserting thin steel plates behind the box F, so that said jaw may stand as near to the cylinder as is desirable, and the space at this point regulates the fineness of the material which passes out. By this adjustment I am enabledto feed the broken rock directly into the subsequent crusher Without any intermediate feeder. The rotary movement of the upper .end of this jaw causes the crushingface'to advance toward the cylinder and to move downward at the same time.

The rock to be crushed is contained in the hopper K above the-cylinder, so that the rock falls into the space between the cylinder and the oscillating jaw, this space being widest at the upper end, as shown in the drawings, and the peculiar rotary and downward movement of the jaw causes the rock to be carried downward between the cylinder and the jaw, the cylinder rotating toward the jaw' with each oscillating movement of the latter,

so that the rock is gradually carried downward and reduced by degrees to a fineness which will allow it to fall out at the bottom. In order to prevent the cylinder from rotating backward with each upward movement of the jaw on its return-stroke, I have fitted short cylinders L into the spaces between the edges M of the cylinder and the inclined block N, which is fitted between the cylindershaft and these edges, so that the rollers lying in these spaces Will allow the cylinder to rotate freely in the direction of the arrow,

but any movement backward, caused by the friction or lifting action of the rock between the jaw andlthe cylinder, will be checked by the rollers L, which bind in the channel in which they lie and act as a clutch mechananism to prevent this backward rotation.

That portion of the driving-shaft J which passes through the upper end of the oscillating jaw is turned eccentric, as shownat O, and upon the outside of this is fitted another eccentric P, having the same throw as the eccentric O. WVhen the larger portion of these two eccentrics lies upon the same side of the shaft J, it is manifest that the throw will be equal to the sum of the eccentricities of the two, but when the outer eccentric is turned around so that its larger portion is diametrically opposite to the larger portion of the eccentric O the two will exactly neutralize each other. The movement of the oscillating jaw may then be regulated to any desired degree between these two points by simply turning the outer eccentric around upon the inner one. In order to secure the outer eccentric at any desired point, I employ a gib Q, the

inner face of which fits the curve of the eccentric O, and the key B, being driven in behind it, causes it to bind and hold the eccentric at any desired position.

\Vhen the rapidity of feeding and crushing any particular kind of rock has been determined upon, the eccentrics are adjusted to give the proper amount of oscillation to the jaw and are then keyed in place. The machine thus forms a self-feeder, which may be adjusted to any degree of nicety to feed ore or other material to stamps or other crushing devices when regularity of supply is required, and it performs the double office of a rock-breaker and an ore-feeder.

The cylinder has flanges S projecting upon each side of the oscillating jaw, and these serve to retain the rock in place between the prevent the roller from turning backward,

said mechanism consisting of the short cylinders M and flanged block N, and an openbottomed feed-hopper fixed over the vertical center of the roller, so that its contents are supported upon the top of the roller and the latter acts as carrier and feeder and crushing-jaw, substantially as described.

In witness whereof I have hereunto set my hand.

FRANK A. HUNTINGTON.

\Vitnesscs:

S. IT. NOURSE, H. 0. LEE.

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