US925337A - Ore-feeder. - Google Patents

Description

B. P. GUSTAFSON.

01m FEEDER. APPLICATION FILED APB..11, 1908.

Patented June 15, 1909. a snEnTs-snnn'r 1.

C. D M w m u n W m m. T n r B m o u E u r Patented June 15,1909.

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i l l l l i l E. F. GUSTAFSON.

ORE FEEDER.

APPLICATION FILED APR. 11. 1909.

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q hbweowo E. P. GUSTAFSON.

ORE FEEDER.

APPLICATION FILED Aljfilll, 1908. 925,337. Pa-fiented June 15, 1909.

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UNITED STATES PATENT OFFICE.

ELMER F. GUSTAFSON, OF IDAHO SPRINGS, COLORADO.

ORE-FEEDER.

To all whom it may concern:

Be it known that I, ELMER F. GUSTAFSON, a citizen of the United States, residing at Idaho Springs, in the county of Clear Creek and State of Colorado, have invented certain new and useful Improvements in Ore- Feeders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in ore feeders, my object being to provide a construction moreespecially adapted for the feeding of crushed ore to stamp mills for purposes of pulverization preparatory to the separation of its metallic values through the instrumentality of the ordinary or any suitable means for the accomplishment of this object. My improved construction is adapted to feed the ore regularly and steadily to the stamp mill. The disk is intermittently actuated. Every time a stamp descends a part (not shown) attached to its stem engages a lever arm connected with the operating parts of the feeder whereby the said parts are actuated for the purpose of imparting a partial rotary movement to the disk.

Having briefly outlined my improved con struction I will proceed to describe the same in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing, Figure 1 is a side elevation of my ore feeder. Fig. 2 is a top plan view of the same. Fig. 3 is a vertical section taken upon the line 33 Fig. 2 viewed in the direction of the arrow. Fig. & is a section taken on the line e'll Fig. 2, viewed in the direction of the arrow, the parts being shown on a larger scale.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the hopper of my improved ore feeder, the same being open at the top and provided with inclined side walls 6 and an inclined rear wall 7, the front wall 8 of the hopper being vertically disposed. This hopper is open at the bottom as shown at 9 to allow the ore to pass to the upper surface of the disk 10, the front wall of the hopper having an opening 12 to allow Specification of Letters Patent.

Application filed April 11, 1908.

Patented June 15, 1909.

Serial No. 426,583.

the ore to move forwardly upon the upper surface of the disk, the latter being normally inclined downwardly and forwardly. To the front wall of the hopper upon opposite sides of the opening 12, are secured two plates 13 and 14 which engage the upper surfaceof the disk and extend upwardly therefrom forming walls to prevent the es cape of the ore except from the lower outer edge 15 of the disk between the points where the said plates terminate. This disk 10 is made fast to a shaft 3 which is inclined to harmonize with the inclination of the disk, the shaft occupying a position at right angles to the plane of the disk. This shaft is journaled in a bearing 16 mounted upon the front wall of the hopper. Above the bearing the shaft is provided with a fast beveled gear 17 having a hub 18 which rests upon the upper shoulder of the bearing around the shaft. Through the lower extremity of the shaft or that which protrudes below the disk, a pin 19 or other suitable fastening device is passed for the purpose of preventing the upward movement of the shaft. It is evident that these features are mere details and that applicant is not limited to the specific construction set forth.

The gear 17 meshes with a similar vertically disposed gear 20 fast upon a hori zontal shaft 21 journaled in bearings 22 mounted upon arms 23, secured to or formed integral with the front wall of the hopper and projecting forwardly therefrom.

Upon the shaft 21, is made fast a wheel or drum 2a whose periphery 25 forms a friction face which is located between two flanges 26 which protrude beyond the said face and maintain the band 27 in place. As shown in. the drawing this band engages approximately two-thirds of the peripheral friction face of the drum, one of its extremities being secured at 28 to a leverarm 29 fulcrumed on the shaft 21, the arm being reinforced as shown at 30 for this purpose. The opposite extremity of the band is secured as shown at 31 to a rod 32 which passes through the angle extremity 33 of an arm 34 rigidly secured to the front wall of the disk by means of cap screws 35 passed through an angle extremity 36 of the arm. The rod 32 protrudes beyond the extremity 33 of the arm and this protruding portion is surrounded by a coil spring 37 introduced between two washers 3S and 39, one of which engages a nut 40 applied to the outer extremity of the rod;

while the other engages the part 33 of the rod. The rod slides freely in the washer 29 and part 33 for a purpose hereinafter explained.

A set bolt 41 is threaded into the horizontal arm 42 of an an le bracket 43 made fast to the front wall of the hopper by cap screws 44. This set bolt is adapted to protrude above the bracket and engage the inner extremity 45 of the lever 29 whereby the arm 46 of the said lever may be depressed for the purpose of shortening the stroke.

A stem 47 is passed through openings formed in the part 42 of the angle bracket and the extremity 45 of the lever, the said stem projecting above the lever and being surrounded by a coil spring 48 which engages the arm 45 of the lever at one extremity and a washer 49 engaging nuts 50 applied to the opposite extremity of the stem. This spring has a tendency to depress the arm 45 of the lever whereby it would normally be held in engagement with the upper surface of the part 42 of the angle bracket 43. Then in this position the lever would be capable of making its maximum length of stroke. To the extent that the arms 45 of the lever is raised above the angle bracket, the stroke due to the descent of the stamp (not shown) is shortened.

From the foregoing description the use and operation of my improved ore feeder will be readily understood. It'may be considered that the ore feeder is supported in suitable proximity to the stamp mill in any suitable manner. As shown in the drawing the upper edges of the opposite side walls of the hopper are provided with horizontally projecting lugs or fastening members '51 which may be secured to stationary beams 52 located on opposite sides of the hopper and indicated by dotted lines in Fig. 2.

Assuming that the material to be acted on by the feeder is discharged into the hopper, it will be understood that the same will pass downwardly through the opening 9 in the bottom of the hopper and come into contact with the upper surface of the inclined disk 10, the ore naturally moving forwardly and downwardly through the opening 12 in the front wall of the hopper. Every time a stamp descends, a part (not shown) attached to one of its stems, engages the upper extremity of a pin 53 applied to the outer end of the lever 29, and depresses the arm 46 of the lever whereby the band 27 is actuated to impart a partial rotary move ment to the drum 24. This movement of the band, places the spring 37 under tension by virtue of the connection on the opposite extremity of the band remote from the lever,

with the rod 32 as heretofore explained.-

The movement of the drum 24 imparts a corresponding movement to the shaft 21 upon which it is mounted, and also a similar movement to the gear 20 which meshing with the gear 17 actuates the latter to turn the shaft 13 and impart a corresponding movement to the disk 10. As the disk moves in the direction indicated by arrow a in Fig. 2, the ore upon the disk between the plates 13 and 14, is moved toward the plate 14 and a portion of it is discharged at the periphery of the disk between the plates 13 and 14. This occurs every time a partial rotary movement is imparted to the disk and the other parts as just described. As soon as the power acting upon the lever arm 46 ceases, the spring 48 returns the lever arm to its normal position, while the spring 37 acting upon the brake band moves the latter in the reverse direction upon the friction face of the drum, whereby the parts are restored to their normal position and made ready for the next descent of the stamp which actuates the lever and imparts the movement to the mechanism just described, each descent of the stamp resulting in a repetition of the aforesaid movement.

Having thus described my invention, what I claim is:

In an ore feeder, the combination with a hopper and a disk connected in operative relation, a short shaft upon which said disk is journaled in suitable proximity to the hopper, a counter shaft, a lever fulcrumed on the counter shaft a wheel drum mounted on the counter shaft and having a friction face, a band engaging the friction face of the drum, one extremity of the band being connected with the lever, tension means connected with the other extremity of the band, an adjustable screw located near the inner extremity of the lever for determining the movement thereof, the lever being capable of movement to actuate the band and impart a partial rotary movement to the drum, a suitable operative connection between the drum and the ore disk shaft, and tension means mounted on the inner extremity of the lever for returning the said lever to its normal position, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ELMER F. GUSTAFSON.

\Vitnesses A. J. OBRIEN, DENA NELSON.

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