US864827A

US864827A - Screen sizing and separating machinery.

Info

Publication number: US864827A
Application number: US31977106A
Authority: US
Inventors: John M Callow
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-06-01
Filing date: 1906-06-01
Publication date: 1907-09-03
Anticipated expiration: 1924-09-03

Description

No.. 864,827. i Jl M. CALI-'Owl PATBNTED vSEPT. 3, 1907'. SCREEN SIZING AND SEPARATING MACHINERY.

APPLICATION IILBD APB.. Z4. 1905. BBNEWED JUNE l. 1908.

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PATENTED SEPT. 3, 1907.

J. M. cALLow. scREBN sIzING AND SBPARATING MACHINERY.

APPLIOATIUN FILED APILM. 1905. BENEWIID JUNE 1, 1906.

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No. 864,827. PATENTED SEPT. 3. 1907. J. M. GALLOW. SCREEN SIZINGAND SEPARATING'MAGHINERY.

APYLIULTION TILBD APR. 24. 1905. BENEWED .TUNE l, 1908.

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J.- M. CALLOW.

SCREEN SIZING AND SEPARATING MACHINERY. rPLIuAToN FILED n.u; 1905. BENBWED JUNE 1, 190s.

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li and C, and the sides are connected to the sides of the machine l", the whole being suitably held together by the bolts at' at.

G G are bearings for the shafts of the rollers B and C, and H H are struts which support the screen and its framework at all four corners. rl`he deflecting roller D is held in position by links J, and serves to defiect and tighten the screen belt by its own weight. The whole machine is preferably set at an inclination with the horizontal so that the delivery roller shall be somewhat higher than the tail roller.

The screen belt is shown in enlarged section in Fig. 5; A is the screen cloth, K K are endless bands of rubber or other flexible material, with vertical side flanges, the horizontal leg of each being split along its whole length and receives the edges of the screen cloth, which are fastened by the staples L L or other suitable means. These flanged edges K K serve the purpose of carrying the screen cloth in its travel around the rollers, taking the strain and pull due to the revolution of the driving roller and preventing this strain or pull from coming upon the delicate screen cloth. The flanges serve also to confine the oversize and ore on the screen and prevent its overflowing the edges of the cloth.

Suitable driving means, as a worm and wheel M, are attached to the shaft of the head roller and connected with the driving shaft N by suitable means, as the worm shaft O, the friction pinion P and the friction disk Q. The friction pinion P is movable along the shaft O for varying the speed of the shaft, and is held in contact with the friction disk Q by the adjusting boxes R R. The shaft N is also provided with cranks S to which are fitted connecting rods T, connected to the frame of the machine by the cross bar U. Power is applied to the shaft N by suitable means as the driving belt V and the pulleys W, and the machine is given a horizontal end shake, while at the same time the head roller B is driven by means of the worm and wheel M through the connecting shaft O and the friction disk and pinion P and Q. 'lhe worm shaft O is preferably broken at Y and is provided at this point with a sleeve Z keyed to one section and working loosely on a feather key oil the other, to allow of the movement of the worm shaft caused by the reciprocation of the machine.

a4 is a feed box and apron provided with distributing buttons b and a flexible apron c for protecting the deflecting roller D.

d d are orifices in the sides of the machine covered with revolving disks e, in which are a series of different sized holes for varying the size of orifice as maybe necessary for the proper' operation of the machine. suitable means may be provided for this purpose.

f and g are discharge holes in the bottom of the machine for the discharge of the products from their respective ends. v

The operation of the machine is as follows: The machine is set in motion by the driving belt V and reciprocated endwise, the screen being caused to travel forward by the mechanism already described; the material to be treated, together with its accompanying water, is fed into the feed box a and distributed over the roller D and falls on the moving screen belt A. The oversize portions are at once carried forward by the screen belt and discharged over the head pulleyB and dropped into the hopper f. To assist in the complete cleansing of the belt of any adhering particles, the spray pipes h are preferably provided. The undersize portions of the feed, together with the water, fall through the screen cloth into the pan E and pass out through the orifices d into'the catch bottom, and thence to the hopper g. The perforated disks e in front of the orifices d are now revolved until the right sized hole covers the orifice, and thereby the water is raised in the pan E high enough to wash or irrigate the screen cloth by the end shake of the machine, any amount of water greater than can pass the orifices being splashed over the tail roller C and thence into the hopper y. r1`he front end of the machine being higher than the back, no water or undersize can pass over it, and this is furthermore prevented by the defiector j which, on the backward stroke of the machine,throws the water back toward the tail end. ln this way the ore on the screen is subjected to a very perfect process of washing, cleansing it of slimy particles and making a perfectly clean, sized product. Since the wave action is in the opposite direction to the discharge of the oversize, the particles retained onthe screen are met and washed many times by the opposing waves. The discharge of some of the water over the tail roller also serves a most important purpose, cleansing and washing the oncoming screen cloth of any slimes and particles entrapped in its meshes, and thus enabling a perfectly clean and unblinded surface to be continuously presented for the reception of the materials to be screened.

By means of the movable friction pinion P, a variable rate of speed can be given to the screen belt, and the rate of progression of the oversize varied at will, according to the requirements of the materials to be separated. The discharge of the oversize is also independent ofthe gravity of the material, and is unaffected within wide limits of the angle at which -the screen cloth lies; it can thus be rendered independent of the speed of the reciprocating motion, and its consequent destructive effects, the reciprocation being only frequent enough to do the necessary washing; the wear on the screen cloth is also distributed over the entire surface of the screen belt,-a unique and important novelty not possessed by any existing machine designed for this purpose.

I claim and desire to secure, by Letters Patent, the following.

l. In screen sizing apparatus, the combination of a frame, a water tank thereon, an endless traveling band of' screen cloth, means for suporting it at its ends above such tank, intermediate means for deflecting the working portion of the band below tbe level of the supporting means and into the water, and means for imparting a reciprocating motion to the frame.

2. In screen sizing apparatus, the combination of a frame, means for imparting reciprocatingmotion thereto, a water tank on the frame, an endless traveling band of screen cloth, means for supporting it at its ends above such tank, intermediate means for deflecting the werking portion of the band below the level of the supports-and into the water, and means for maintaining a substantially constant amount of water in the tank.

3. ln screen sizing apparatus, the combination of a frame, means for imparting a reciprocating motion thereto, a water tank on the frame, an endless traveling band of screen cloth, means for driving said band, means for varying the speed of travel of the same, and means for throwing back 'the water in the tank at each forward stroke of the machine.

el. In screenA sizing apparatus, the combination of a frame, means for impartinga reciprocating` vmotion thereY to, a water tank on the trame, an endless traveling,I band of screen cloth, means for dellccting; the working portion ot the band into the water, means for maintaining,l a substantially constant amount of water in the tank, and means for throwingback the water in the tank at each forward stroke of the machine.

5. In screen sizing; apparatus7 the combination of a frame, Ine-ans for imparting a reciprocatingr motion thereto, a water tank on the frame, head and tail rollers, an endless band of screen cloth traveling over said rollers, means for detlecting the working portion of the band into the water, and means for throwing back the water in the tank at each forward stroke of the machine.

G. In screen sizing apparatus, the combination with a frame, means for imparting reciprocating motion thereto, a Water tank on the frame, an endless traveling band of screen cloth, a roller arranged to deect the working portion of the band into the water, and a detlector in the tank adapted to throw back the water at each forward stroke of the machine. l

7. In screen sizing apparatus, the combination of a water tank head and tail rollers, an endless traveling,` band of screen cloth, means for driving said band of screen cloth, means'for varying; the speed of travel of the same, and means for throwing back the water in the tank over the tail roller.

8. In screen sizing apparatus, the combination of a Water tank, head and tail rollers an endless traveling band of screen cloth, means for deflecting said band into the Water, means for maintaining` a substantially constant amount of Water in the tank, and means for throwing back the water in the tank ever the tail roller.

9. In a screen sizing apparatus, the combination ot' a water tank, head and tail rollers, an endless band of screen cloth traveling over said rollers, lneans for deiiecting the band into the wa ter, and means for throwing back JOHN M. CALLOW.

Witnesses T. 1G. CoNnAD, MAE THonNn.