US407392A

US407392A - Joshua b

Info

Publication number: US407392A
Authority: US
Publication date: 1889-07-23
Anticipated expiration: 1906-07-23

Description

(No Model.) 2 Sheets-Sheet 1. J. B. BARNES.

DUST COLLBGTOR.

Patented July 23, 1889.

No. 407.39&

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2 Sheets-Sheet 2.

J. B. BARNES. DUST GOLLEGTOR.

(No Model.)

Pateited JuIy ZS, 1889.

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UNITED STATES PATENT OFFICE.,

J OSHUA B. BARNES, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TO J OSEPH J. SELDNER, OF SAME PLACE.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 407392, dated July 23, 1889.

Application filed January 15, 1889. Serial No. 29G,439. (No model.)

To all 'Luiz/0777, it may concern:

Be it known that I, J OSHUA B. BARNEs, of the city of Baltimore, and State of Maryland, have invented a certain new and useful Improvement in Dust-Oollectors for Flour-Mills, of which the following is a full and complete specification, reference being had to the accom an 'in drawin 's in which similar letp t: b

ters of reference indicate similar parts.

Figure 1 is a sectional elevation of my dustcollector, taken parallel to the shaft. Fig. 2 is a sectional elevation of the dust-collector casing, taken at right angles to the shaft, and a full elevation of the du st-collector contained therein. Fig. 3 is a sectional elevation of the dust-collector, with some of the parts removed and showing a different position for the dustinlet pipe and a different form of dust-deflector. Fig. 4 is a full elevation of' the drivingshaft and hub of pulley and showing one of the spokesin horizontal section, the rest being removed.

The object of my invention is to provide a cheap, compact, and successful dust-collector, by which the flour which in the operation of many machines in a fiour-mill, particularly the purifiers, becomes Suspended in the atmosphere and must either be lost by being blown out into the air or collected in some l iy dust-collector consists of a centrifugal cylinder and a fan combined, by means of which the dust is sucked or driventhrough the centrifugal cylinder, where it is collected and the air, more or less freed of fiour,allowed to escape.

My invention may be carried into operation in many ways. The fan may be placed in such a position in front of the collector that it will drive the air laden with dust through itin'spite of the resistance offered by the rapidly-revolving spokes; or it may be placed beyond the collector, so as to suck the dustladen air through the collector; or, where compactness is desired, the collector may be constructed, as I have shown it in my drawings, with the centrifugal cylinder and fan combined, so that they can be made in one piece and operated by the same sha'ft and power.

In the drawings, 1 represents the casing of the collector, which is generally made of The arms 8 8 are made in the form of the wood, or may be of any other material, and is preferablycylindrical in shape, or octagonal, as shown, and closed at the ends, so as to be conparatively air-tight except where perforatons are purposely made. This casing is secured upon a suitable stand 2.

3 is a shaft suitably journaled in pillowblocks 4 4 and driven by any form of power. (Not shown.) The shaft passes through the center of the casing parallel to its axis.

Keyed to the shaft on the interior of the casing is a broad-faced cylinder 5. This is of such a width as to fill the entire interior of the casing, the -edges of 'the rim running in crcular grooves 6 o' in the vertical ends of the casing. These grooves should be made of such a size as to permit the edge of the pulley to run freely in them without touching the wood of the casing, for the reason that if the pulley running at very high speed should touch the casing fire would result from friction. On the interior of -the pulley, at the point where the arms would join the rim, a web 7 Vis cast, which is circular in form, and is united to the interior of the rim at its center. This web is about one-third or onehalf of the radius of the pulley in depth. To its interior edge the arms 8 S are attached.

wings of a fan and are set at any desired angle. That shown in Fig. 4 is probably the best position.

Passing through one of the vertical sides of the case l into its interior, and also into the interior of the pulley, is a dust-pipe 9, the size of which must be determined by the size of the collector, the speed at which it is run, and the pressure eXerted by the fan. The outlet of the dust-pipe on the interior of the collector is turned down at a right angle, so as to deliver its dust at right angles to the interior of the rim. The position at which the dust-pipe enters the collector is immaterial, provided its outlet delivers the dust at 95 right angles to the interior of the pulley-rim. In Fig. 3 I have shown the dust-pipe introduced into the upper part of the casing, but preserving the proper direction of the outlet. Experience has shown that it is desirable to place the outlet of the dust-pipe at such a distance from the interior of the pulley-rim that the area between the mouth of the pipe and the pulley-rim will be about equal to that of the pipe, se as to avoid any retardation of the infiowing stream of air due to its having to be forced through a space smaller than the pipe. In the oppesite end of the easing froni that at which the dust enters is the air-pipe 10. As shown in Figs. l and 2, this pipe is located above the driving-shaft; but in Fig. 3 it is shown as a simple opening around the shaft.

Secured te the interier of the casing 1 by braces 11 11 is the defiectingshield 12. (Shown in Figs. 1 and 2.) This shield censists of a semi-cylinder of any suitable material, closed at the top and open at the bottom, and of such a size as te cover entirely the open space on the 'interier of the web. This shield, standing immediately beyond the fan, will defieet all of the air drawn through it and turn it se as to cause it to inpinge a seeond time upon the interier of the pulley-rim at right angles te it. Both sdes of the ends of the casing of the collector are perforated with two circular lieles through which pass the dust-

collectors

12 and 13 and conveyers li ll. The position of the collecters is inmaterial, se long as they are se located and adjusted as to collect the dust as it adheres te the interier of the centri'fugal cylinder.

The eolleetors are n'early cylindrical in form and are of thin metal, the edges of which, instead of being joined se as to form a complete cylinder, are lapped over ene another a short distance and separated, se that the interier edge remains in the line of the periphcry of the cylinder, while the eXterier one is fiared out, se as to form a projeeting lip throughout the length of the cylinder, which, being placed in close contact with the interier of the pulley-rim, will scrape off and collect within the cylinder whatever adheres to the interier of the pulley-rim.

On the interier of the colleetors are placed screw conveyers 14- 14, the shafts of which are provided, on their outer ends with pulleys er gcars 16 1G,by which they may be given suitr able revolution. The ends of the oollectors on the outside of the casing are provided with spouts 15 15, by which the fleur-dust collected may be delivered at any desired place.

The casing being somewhat larger than the pulley, and the pulley necessarily fitting loosely in the greoves G G, some dust will escape from the interier of the pulley into the casing outside thereof. The rapid revolution of the pulley inside of the casing will cause a rapidly-revelving current of air to circnlate inside of the casing, and consequently te carry with it all dust that escapes from the collector.

in its path to drive the Suspended dust out ot' the opening. A provision of this kind is made by making an opening 17 in the casing at er near the top, and inserting into this opening two funnel-pipes 18 18, which cover air-pipe 10.

p The motion of this current of air will be sufiieient if an opening be provided the opening and i'c-enter the easin g ata point within the collector. Referring te Fig. 3, anotlerforn of shield 19 is there shown, which consists of a fiat disk of thin metal cevering the outlet and acting as a defiector.

The operation of the device is as fellows: Air laden with fiour and other dust enters the collector by the pipe 9 and is delivered from its turned-ever end against the interier of the pulley or centrifugal cylinder at about right angles to the surface thereof, the pulley having been previously raised to a requisite rate of speed. The dust as it falls upon the interier of this revolvng cylinder will be carried from under the mouth of the dust-pipo and borne upward with the revolution of the pulley. The rapid revolution of the pulley will, by centrifugal action, cause this dust to continue to adhere to the interier of the pulley, where it will become caked together in a mass. The air fermerly laden with dust and hearing such particles of dust as may not have been caught upon the interier surface of the pulley will pass through the fan, which is forned by the skewed arms of the pulley, and as it does se strike upon the deflector 12 and be deflected from a course parallel to the shaft and turned' downward te a course at right an gles to the shaft, where it will be prejected a second time against the interier of the pulley at right angles thereto. Here the same operation will take place which resulted from the original impact of dust-laden air which entered the collector by the dust-pipo. The dust prejeeted against the interier surface of the pulley at right anglcs er about right an gles will collect upon the surface and be carried from under the mouth of the defiector by the revolution of the pulley and causcd to cake upon the interier of the pulley by centrifugal force. This second inpi'ging of the air against the interier of the pulley will cause almost all of the dust to be cellected, and the air freed from dust will pass up behind the defiector and out through the As the interier of the pulley becomes coated with a layer of fleur and other The dust from the appa-atus through the spent 15.

;The eenveyer 13 is run by any suitable mechjanism. The drawings show a belt and a pair of pulleys; but any other convenient meeh- 'anism may be empleycd for this purpose.

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

1. In a dust-collector, the cenbination of a revelving centrifugal cylin der, through which the dust-laden air is made to pass, a fan suit- TOO IIO

ably located to cause a current of air to flow through said cylinder, and a dust-laden airinlet pipe projecting into the interier of said cylinder and delivering its air and dust at approximately right angles to the interier of the cylinder, as and fer the purpose specified.

2. In a dust-collector, the combination of a revolving centrifugal cylinder provided with arms connecting said cylinder to a hub, said arns being skewed se as to form the wings of a fan, substantially as described.

3. In a dust-collector, the combination of a centrifugal cylinder provided with skewed arms connecting the interier thereof with a revolving shaft passing through its center and by which said cylinder is turned, and dust-eellectors prej ecting into the interier of said cylinder and bearing against the interier surface thereof, whereby the dust which adheres to the interier surface of said centrifugal cylinder will be collected and removed therefrom, and a dust-laden air-inlet pipe prejecting inte the cylinder on the side into which the air is drawn by the fan.

4. In a dust-collector, the combinatien of a centrifugal cylinder provided with skewed arms connecting the interier thereof, with a revelving shaft passing through its center and by which said cylinder is turned, and dust-collectors prej ecting into the interier surface thereof and ascrew conveyer operating within said dust-ce1lector to remove the same therefrom, and a dust-laden air-inlet pipe projecting into the cylinder on the side into which the air is drawn by the fan, substantially as described.

5. In a dust-collector, the combination of a centrifugal cylinder connected te arevolving shaft by arms which are skewed se as to form fan-wings, and a dust-laden air-inlet pipe prej ecting into the cylinder on the side into which the air is drawn by the fan, and a deflector located within said centrifugal cylinder and on the side of the fan-arms, from which the air is forced in position te defiect the air which is forced through the fan and cause it to inpinge upon the interier of the centrifugal cylinder at about right angles thereto.

6. In a dust-celleetor, the combination of a centrifugal cylinder connected to a revolving shaft which passes through the center thereof by arms which are skewed so as to form the wings of a fan, with a dust-inlet pipe the end of which is curved se as to deliver its dust at right angles to the interier surface of the centrifugal cylinder, and a deflector located on the side of the fan, to which the air is forced in position to defiect the air which comes through the fan and cause it to strike upon the interier surface of the centrifugal cylinder at about right angles thereto, substantially as described.

7. In a dust-collector, the conbination of a centrifugal cylinder meunted upon and secured to a revolvin g shaft by arms which are skewed so as to have the wings of a fan, with a casing surrounding said cylinder and closing the ends thereof, and a dust-laden airinlet pipe prejecting into the cylinder on the side into which the air is drawn by the fan, and a pipe leading from the interspace between the cylinder and the casing and terninating upon the interier of the eollector, so as to deliver air and dust which may escape into said interspace from the interier of the collector back into the interier of the collector, substantially as described 8. In a dust-collector, the combination of a centrifugal cylinder connected to a revolving shaft which passes through the center thereof by arms which are skewed so as to form the wings of a fan, with a dust-inlet pipe the end of which is curved so as to deliver its dust at right angles to the interier surface of the centrifugal cylinder, and a deflector located 011 the side of the fan, to which the air is forced in position to defiect the air which comes through the fan and cause it to strike upon the interier surface of the centrifugal cylinder at about right angles thereto, and a head closing the end of the cylinder from which the air escapes, perforated with an air-outlet aperture.

J OSI-IlTA B. BARNES.

Witnesses:

ARTHUR STEUART, WALTER S. WIL INSON.