US508611A

US508611A - Dust-separating machine

Info

Publication number: US508611A
Authority: US
Publication date: 1893-11-14
Anticipated expiration: 1910-11-14

Description

(No Model.) 3 Sheets-Sheet. 1.

W..W. GREEN. DUST SEBABATING MACHINE.

N0. 508,611. Patented Nov. 14, 1893.

(Np Mode1.) -3 sh ets-sheet 2.

W. W. GREEN. DUST SEPARATING MAGHINE.

No. 508,611. memed Noam, 1893.

ksisas." wq ZZZ/6725071 UNIT D ST TES PATENT OFFICE.

WILLIAM W. GREEN, OF CHICAGO, ILLINOIS.

DUST-SEPARATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 508,611, dated November 14,1893.

Application filed October 13, 1890.

To a. whom it may concern:

3e it known that 1, WILLIAM W. GREEN, a citlzen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dust-Separating Machines, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in that class of dust separators which may be used for general purposes, and has for its ob ject the separating of the dust from the material and quietly depositing the same and re turning and using the volume of air over again, thus obtaining a finer separation and preventing the air from passing out with and spreading the dust.

Figure l is a side elevation of an apparatus embodying my improved features; shown partly in section; Fig. 2 a vertical transverse section in plane 2, Fig. 4; Fig. 3 a vertical longitudinal section in plane 3,- Fig. 4; Fig. 4: a plan; and Fig. 5 a broken-away horizontal section in plane 5 Fig. 1. 7

Referring to the drawings, A represents'the separating machine, B a dust receiving chamber and B a fan.

In the present application the machine consists. of a rectangular box-like structure having the shaft passing longitudinally therethrough. The respective ends of this shaft are provided with suitable journal bearings as shown.

O is a screening cylinder mounted-on the shaft inside of the inclosing casing of the machine, as shown in Figs. 2 and 3. The surface of the screening cylinder is composed of wire cloth having difierent sized meshes. The section a. is quite fine, section a coarser and section a still coarser, so as to divide the material into as many different lots or grades.

The bottom of the machine is provided with a corresponding number of discharge-hoppers, a having inclined sides through which the difierent lots of screened material are discharged. The matter to be screened is fed in through the hopper (1 located at one end of the machine, the tailings passing out through the spout, a at the opposite end.

Serial No. 3 6 7, 91 (No model.)

Considerable space is left between theunder side of the screening-cylinder and the discharge hoppers in the bottom, so as to provide the air-chamber a The inclined wings, a a", carry the material, as it drops from the screening-cylinder toward the center, and form the contracted passage or through which the material must drop and the air-current pass up through, thus rendering the operation of separating and carrying away the dust more effective.

The fan B is placed on the top of the machine near one end, as shown in Figs. 3 and 4. One end of the suction-pipe D is connected to the fan; the opposite end being curved downwardly and openinginto the interior of the machine through the top and near the opposite end from the fan. The slide or gatevalve, a, provides means for increasing or diminishing the area of the passage in the pipe D. The fan-shaft 1) passes longitudinally through the pipe D and is provided with suitable journal-bearings, as shown. The pulley b on one end of the fan-shaft receives the belt 5 from the motive power. Motion is transmitted to the screening-cylinder from the pulley b on the fan shaft, through the medium of the belt b the pulley b the counter-shaft b", upon which the same is mounted, the pinion b mounted on said countershaft'and the gear-wheel b mounted on the cylinder-shaft.

The cylindrical dust-chamber or receptacle B is located at one side of and adjacent to the machine, and is supported on the legs d.

The horizontal delivery-pipe F connects the fan and upper part of the dust-chamber (see Figs. 1 and4.) and is provided at an intermediate point with the pocket 01, having the discharge-pipe d. The heavier particles, drawn through by the action of the fan, will fall into the pocket (1 and may be discharged therefrom by means of the valve (1 thus keeping the passage clear.

The vertical tube, G, is inserted down through the top of the dust receptacle and stops short of the lower end thereof, thus forming a dust-trap, as shown in Fig. 1. To

the upper projecting part of this tube is connected one end of the angular return-pipe, H; the opposite end of which is inserted in the lower part of the machine and opens into ICC the air-space below the screening-cylinder, as shown in Fig. 3.

I11 operation the fan draws the dust and air out of the machine and forces it into the dustrecelving-chamber through the delivery-pipe F, where it takes a spiral downward course around the trapping-tube in said dust-chamber; the air being drawn into the lower open end or mouthof said tube and returned and discharged into the machine below the screenlng-cylinder, as indicated by the arrows; the dust separated quietly settling down through the lower conical or contracted end, g, of the dust-chamber. Thus the same air is used over again and is prevented from passing out with the dust and agitating and spreading the same throughout the building to the annoyance of the workmen.

The dust-chamber or receptacle and fan maybe used in connection with different machines froin the one illustrated for the purpose of quietly disposing of the dust without the same being blown all over the compartment orbuilding; such application of the fan and dust-chamber being now in use in connection with an ore-crushing machine;

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a dust-separating machine, the combination of a screening-cylinder, a casing therefor, a fan located on top of said casing, asuction'pipe connecting the fan and the casing, a dust-receiving chamber, a horizontal delivcry-pipe connecting the fan and the said chamber, a tube extending down into the chamber and opening above the bottom thereof, and a pipe connecting with the upper end of the tube and leadinginto the casing below the screening-cylinder.

2. In a dust-separating machine, the combination of a screening-cylinder, a casing therefor, a fan located on top of said casing,a suction-pipe connecting the fan and the casing, a dust-receiving chamber, a horizontal delivery-pipe provided with a valved pocket and connecting the fan and the dust-chamber, a tube extending down into the chamber and opening above the bottom thereof, and atortuous pipe connecting with the upper end of the tube and leading into the casing below the screening-cylinder.

3. In a dust-separating machine, the combination of a screening-cylinder, a casing therefor, a fan located on the top of the casing, a suction-pipe connectingthe fan and the casing, a dust-receiving chamber having an open lower end, a horizontal delivery pipe connecting the fan and the casing, a trapping tube arranged within the said chamber and extending nearly to the bottom thereof, and a tortuous return-pipe connecting with the upper end of the said tube and leading into the air-space between the screening-cylinder.

WILLIAM W. GREEN. Witnesses:

JAMES MORRISON, L. B. COUPLAND.