US1128796A - Separator-feeder. - Google Patents

Description

W. K. LIGGBTT.

SEPARATOR FEEDER.

APPLICATION FILED SEPT, e, 1912.

Patented Feb. 16, 1915.

OOOOOOOOO THE NORRIS PETERS Co PHOTO'LITHCL. WASHINGIQN, 0 L

WILLIAM K. LIGGETT, 0F COLUMBUS, OI-IIO, ASSIGNOR TO THE JEFFREY MANUFAC- TUBING: COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF-OHIO.

SEPARAT'OR-IEEEDEB.

Specification of LettersJPatent.

Patcntedlteb. 16, 1915..

Original application filed. May 8, 1912, Serial .No. 695,853: Divided and this application filed September 6,

1912." Serial No. 718,882.

To all whom it mag concern Be it-known that I, .WILLIAM K. LIGGETT, a citizenof the UnitedStates, residingat Columbus, in the county of Franklin and State of Ohio, have invented certain newand useful Improvements in Separator- Feeders, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in feeding mechanisms and is particularly adapted for the purpose of feeding granular or finely divided-material slowly upon vibrating screens, separators and grinding mills.

The invention is showninconnection with a separator of the type set forth in my pendingapplication Ser. No. 695,853, filed May 8, 1912, the present application being a division of the said pending application.

In the drawings Figure 1 is a fragmentary longitudinal vertical sectional view showing in detail the hopper and its feeding mechanism. Fig. 2 is a side elevation of a screen-i ing apparatus used in connection with my improved feeder, and Fig. 3 1s a front elevation of the devlce shownin Fig. 2.

In the drawingsI have shown a separator of a vibrating screen type in which my improved feeding device or hopperis incorporated. It is to be understood that whereas the drawing shows this feeding mechanism in connection with a particular. type. of.

screen the invention is to bein no wise limited to this application as it may be used with equal success in connection with any other kind of apparatus towhich material of a divided or granular nature is to befed.

Referring to the drawings, the numeral 1 indicates in general the screen stretchers and their supports which, together with the vibrating device comprises the screening mechanism proper. The screens are mounted within a casing provided with suitable doors for easy'access to the interior, this casing being supported upon a structural framework adapted to be secured to a suitable foundation. The casing comprises vertical side plates 2, the front 3 with-its swinging door 1, the inclinedbottom 5, the upper back 6 and the inclined top 7 which is prooutstanding lugs 18 which are engaged by a supporting cable 141. For the purpose of supporting the cable'lland providing a winding'mechanism by whichthe lower end of the screen mayv beraised or lowered to obtain the best angle of operation fordifferent characterv of materials, a transverse:

shaft 15 is mounted in the front portion of the casing and provided with a pawl and ratchet mechanism 16. The cable l l is continuous and passes throughlthe two holes 17 drilled diametrically through the shaft 15. Ahand .wheel 18is attached to the end of the shaft 15 by means of which it is operated.

thereby raising or lowering the lower end of the screen, the ratchet device holding it in.

any desired position.

The screen frame 11 is provided at its lower end and along its sides with upstanding fingers ,19 which hold the screen stretchers in position and prevent displacement duringoperation. Side pieces 20 are secured to the sides ofthe frame and prevent material from over-running V the edges of the screen.

The transverse rod 12 upon which the upper end of thescreen frame 11 is mounted passes outward through openings in the sides 20f the leasing, and is. supported in blocks whichslide within vertically arranged guide brackets 33 attached tothe upright casing supports 10. Vertically arranged coil springs are placed within the brackets 83 and bear against the upper and lower sides of the blocks32. This arrangement allows the upper;end of the screen mechanism to receive a vertical-floating or spring cushioned motion, the tension of the springs being adjusted by set screws 35 passing through the ends of the brackets 38.

A- transverse shaft 36 is mounted in journals 37 upon the upper face of the casing and is driven by a pulley 3S. Mounted upon this transverse shaft at each side of the casing are two eccentrics 39 carrying eccentric straps 40. Blocks are placed upon the ends of the rod 12 and are slidably mounted Within two separable bumper blocks 44. Connecting the bumper blocks and the eccentric strap are two rods 45 which act as pitmen and also secure together the two halves of the eccentric straps 40. The lower ends of the rods 45 or pitmen are threaded and pass through the bumper blocks 44. Nuts 46 are placed upon the threaded portion of the rods 45 above and below the two bumper blocks. Coil springs 47 surround the rods 45 and are placed between the two blocks, extending into recesses 48 in the inner faces of the bumper block. These springs separate the two bumper blocks and press them resiliently against the limiting nuts or stops 46. Collars 49 are secured upon the ends of the rod 12 so as to prevent the bumper blocks from becoming displaced and slipping over the blocks 43 when the machine is in operation. The rotation of the shaft 86 through the eccentric 39 causes the rapid reciprocation of the two pitmen 45. The pitmen in turn cause the bumper blocks to vibrate rapidly back and forth upon lines slightly inclined from the vertical.

Mounted on the upper end of the casing is my improved hopper and feeding device comprising the chute 50 feeding into a trough 51 extending the entire width of the casing and provided at its lower portion with an inclined plate 52 of a flexible material such as sheet steel, and securely bolted along its rear edge to the casing. Coacting with this inclined plate or feeder bottom is a vertically slidable gate 53 positioned at the front of the hopper and adapted to be raised or lowered by hand wheels 54. An upturned lip 55 is formed on the lower edge of the plate 52 and co-acts with the gate 53 to prevent the material from flowing out through the hopper except when the plate 52 is vibrated. A "transverse angle piece 56 is riveted along the under side of the inclined plate 52 and has attached to it downward and forward extending arms 57. These arms rest upon or bear against pins or lugs 58 attached to the side pieces 20 of the screen frame 11. The forward extending parts of the arms 57 are curved in arcs about the rod 12 as a center so that when the lower end of the screen frame is raised or lowered, the upper end swinging about the shaft 12, the lugs 58 will hear at all times the same relation to the arms. The vertical vibration of theupper end of the screen frame is through the above described arrangement transmitted through the arms 57 to the inclined flexible plate 52, this rapid vibration causing material to flow downward over the plate in a steady stream, the amount depending upon the elevation of the gate The vibration of this plate which is securely fastened at its rear edge to the casing is of a nature that cannot be obtained where the rear edge of the plate or hopper bottom is hinged or pivotally mounted. On the upward travel of the screen frame the hopper bottom, instead of being swung upward as is the case of the pivoted bottoms, is bent upward in a slight arc, this being found to greatly facilitate the distribution of the material transverse the feeder plate and give superior results.

It will be observed that the two adjusting wheels 54, 54 for the gate are independent of each other and that by means of them the angle of the gate with respect to the feed plate can be varied. I11 other words, the rate of feed at one part of the plate can be made greater or less than the rate of feed at another part.

What I claim is 1. In a feeding mechanism, the combination of the hopper, a flexible inclined feed plate rigidly secured along one edge to the hopper, the vertically operated gate for regulating the flow of material from the hopper upon the plate, the arm rigidly secured to the flexible plate, and means for imparting continuous rapid vibrations to the said arm.

2. In a feeding mechanism, the combination of the hopper, the inclined feed plate secured along one edge to the hopper, the arms rigidly secured to the inclined feed plate, a portion of the said arms being formed in an arc, and a vibratory means pivoted at the center about which the arcuate portion of the said arms are formed and contacting with the said arms.

3. In a feeding mechanism, the combination of the hopper, the inclined flexible sheet metal bottom for the hopper rigidly secured along one side to the hopper and having its lower edge part upturned to form an integral lip, and means for imparting continuous rapid vibrations to the said flexible inclined bottom.

4. In a feeding mechanism, the combination of the hopper, the inclined flexible feed plate rigidly secured along one side to the hopper, a gate for regulating the flow of material upon the plate, means for imparting continuous rapid vibrations to the flexible plate, and an upturned lip formed along the lower edge of the said plate.

5. In a' feeding mechanism, the combination of the hopper, the inclined feed plate for the hopper, the means for imparting continuous rapid vibrations to the feed In testimony whereof I affix my signature,; plate, the gate for regulating the flow of main presence of tWo Witnesses.

terial along the plate and the plurality of independent adjusting devices for the gate, WILLIAM LIGGETT' whereby one part of the gate can be ad Witnesses:

W. J. MONTGOMERY,

justed With respect to the plate independ- DUDLEY T. FISHER.

ently of other parts.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents;

Washington, D. G.

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