US474490A - Dust-collector - Google Patents

Description

(No Model.)

G. WALTER.

I I DUST COLLECTOR. No. 474,490.

Patented May 10, 18:92.

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UNITED STATES PATENT OFFICE.

GEORGE WALTER, OF DULUTH, MINNESOTA.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 474,490, dated May 10, 1892.

Application filed August 21, 1891. Serial No. 408,302. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE TALTER, of Duluth, in the county of St. Louis and State of Minnesota, have in vented certain improve ments in Dust Collectors, of which the following is a specification.

My invention relates to dust-collectors, and especially to improvements upon the dustcollector described and claimed in my application for patent, Serial No. 376,859, allowed May 21,1891; and the object of the invention is to simplify and cheapen the construction of such dust-collectors and render the same more efficient and reliable and more easily regulated.

My invention consists in a horizontal cylinder having closed ends, in combination with a long narrow inlet-spout extending nearly or quite across the full length of. the drum or cylinder, a discharge or discharges, a longitudinal opening or slot arranged in the cylinder, and a receptacle provided in connection therewith for receiving the dust.

,The invention consists, further, in a particular construction of the outlet spout or discharges, in a particular arrangement of said longitudinal slot and the dust-receptacle, and in a particular construction of the dust-dis charge spout in the lower end of the dust-receptacle.

My invention will be more readily understood by reference to the accompanying drawings, in which- Figure 1 is a transverse sectional view of a dust-collector embodying my invention. Fig.

2 is a section on the line x a; of Fig. 1. Fig. 3 is an end elevation of the dust--collector. Fig. 4 is a sectional detail of the dust-discharge spout.

As shown in the drawings, the main part of the dust-collector is made up of the cylinder or drum having the cylindrical walls 2 and the ends 3 and t,provided with central openings adapted to receive the sleeves 5 and 6, respectively. The edges of these openings are preferably strengthened by the wooden blocks or rings 7, secured on the ends or heads of the drum. The axial spouts 5 and (3 are adapted to be pushed in or out through their openings and to carry off the purified airfroni the center of the drum.

The idea of the invention is to throw the d ustforcibly against the cylindrical walls of the drum, it being thence discharged into a receptacle, while the air, as it is purified, is continually worked toward the center or axis of the drum, from thence being discharged through the axial spouts.

It will be seen that when the spouts or sleeves 5 and 6 are pushed into the drum the space between the ends of .the same will be small, and hence only a limited volume of air may enter the sleeves to flow out through the same. On the other hand, when the sleeves are drawn out they may carry their full capacity of air, the entrance to the mouths of the sleeves being unobstructed.

To further enable the operator to regulate the outflow of air, and thereby the dust deposit, I provide another telescoping sleeve 8 within each of the sleeves 5 and 6 and adapted to form an extension thereof. The dust-laden air is blown into the drum through the tangential spout or duct 9. This duct 9 I make narrow and long, as shown, the same extending clear across the side of the drum and the ends 10 being formed substantially by extensions of the ends 3 and at thereof. The top and bottom of the spout are formed by the plates or boards 11 and 12. The advantage of this wide spout is that the air is forced into the cylinder and against the wall thereof in a thin wide stream, so that the dust is forced more quickly and readily against the walls 2 by the momentum resulting from the velocity of the air-current. Directly beneath the inletspont and in the lower part of the walls 2 I provide the wide opening or longitudinal slot 13, formed by cutting away the walls and carrying the part 14 thereof into a vertical plane. The opening thus formed is closed to the direct passage of air by the dust hopper or receptacle 15, having the funnel shape shown and secured to the wooden frame 16, arranged directly about the edges of the dust-discharge spout. The edge 17 of the wall2 is projected slightly beyond the block 16, so that the dust after falling into the hopper will not be carried out byeddy-currents ofair existing within the receptacle. Thus it is seen that the longitudinal slot is formed in the side of the drum and the dust which collects in or against the inner walls of the drum is driven down the same and across the bottom of the drum and precipitated over the edge 17.

The course of the air-currents I have indicated in Fig. 1 with the dotted lines, indicating that the same have a spiral progressive movement toward the axis of the drum. During the passage of air from the walls to the center the dust is continually thrown therefrom toward the edge of the walls by centrifugal action. The dust is indicated in general by the small arrows, Fig. 1. A dead-air space practically exists in that part of the drum directly over the dust-receptacle and, as shown by the arrows, the dust loses its velocity at this place, and hence, coming more within the influence of gravity, falls into the dust-receptacle, the force of gravity at this time overcoming, the force of the air-current tending to carry the dust onward. The dust collecting upon the inside walls of the receptacle 15 slides down into the discharge-spout 18, which spout is provided with the central core 19 and the spiral flight 20, arranged about the same and adapted to partially close the direct passage through the spent, so as to prevent the outflow of any considerable volume of air. Such an amount as is required to blow out the dust being alone allowed to discharge, I preferably arrange the spiral and core within the inner sleeve 21, adapted to be pushed into the outer spout, the same being fitted tightlythereto, so as to be held firmly therein without additional fastening or looking, while at the same time being readily removable in. case the spout becomes choked with dust.

By the arrangemant of the dust-receptacle at the side of the drum 1 gain additional working space and the advantage of the dead-air space directly above the dust-receptacle. It is obvious, also, that by this arrangement I relieve the dust-hopper from the air-pressure and cause the dust to leave the machine dry without being intermixed with the outflowing air. It will be seen, however, that as soon as I push the sleeve into the center of the ends 3 and 4 the air-current throws a part of its pressure into the dust-receptacle. This action would cause the air to flow out freely with the dust. I obviate this objection by pulling the spiral d ust-dischargi ng device into the hopper.

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

1. The combination, with the cylinder or drum, of a tangential inlet-spout, through which the dust-laden air enters the same, means for discharging the air, a dust-discharge slot 13, provided in the lower part of the cylinder, the vertical portion 14 of the wall, and a dust-receptacle arranged beneath the same, substantially as described.

2. The combination,with the funnel-shaped dust-receptacle, of the spout 18, the sleeve 21, adapted to be inserted within the same and provided with the central flight 20, and the core 19, substantially as described, and for the purpose specified.

3. The combination, in a dust-collector, of the cylinder or drum having the Walls 2 and ends 3 and 4, with a tangential inlet therefor, the vertical section 14 of the wall 2, the slot 13, the frame 16, the overlapping edge 17 of the wall 2, and the dust-receptacle depending from said frame, as described.

4. The combination, with a drum having vertical heads arranged at right angles with its cylindrical walls, of a tangential inlet entering the top of the drum, an opening arranged in the lower walls of the drum, the inher edge of said opening being arranged to one side of the center of the drum, the outer wall 14, vertically arranged, the tapering settling-chamber 15 for the dust, said tangential inlet-opening being arranged above the discharge-opening, and air-discharge openings arranged in the head or heads of the drum, substantially as described.

5. The combination, with the drum having the straight heads 3 and 4, provided with central openings, of adjustable sleeves arranged in said openings, the long and narrow tangential inlet-spout 9, arranged on the top of the drum, said drum provided with the wider dust-discharge opening 13, and the perpendicular wall 14, whereby a dead-air space is created between the projecting edge 17 of the drum and the wall 14, substantially as described.

In testimony whereof I have hereunto set my hand this 13th day of August, 1801.

GEORGE WALTER. In presence of K. E. LITTLE, HOMER B. DIBELL.

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