US2248181A - Dust collector - Google Patents

Description

July g, T1941. R. LITTLE DUST COLLECTOR Filed Oct. 26, 1940 2 Sheets-Sheet 1 In mentor Z a Wmz-d L iff/ July 8, 394-1 R. LHTTLE 2,248,181

DUST COLLECTOR Filed Oct. 26, 1940 2 Sheets-Shet 2 Inventor m m 41% Me A itorneys with the interior Patented July 8, 1941 UNITED STATES PATENT OFFICE I wartime-me I Raymond Little, D'ccatur Ind. I Alllluclflolaocchml sir-glue. 363,0?9 I This invention relates to a dust collector for freeing air of dust andis especially adapted for use in grain grinding mills and similar places where there is a constant danger of explosions from dust-laden air. The primary object of the invention is the provision of a device of this character'in which dust-laden air may be forced'and caused to travel in cyclone fashion to bring about separation of the air and dust and permit the dust to gravitate out of g the device for collection while the air may pass upwardly and outwardly substantially free of dust.

" Another object o1 the invention is the'provision of adjustable baiiles for regulating the flow "of air upwardly and outwardly oi the device to assist in removing dust from the air and are regulated in accordance with the amount oi. dust which may be in the air as said air leaves the device.

With these and other objects in view, the invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure l is a side elevation illustrating a dust collector constructed in accordance with my invention.

Figure 2 is a top same.

plan view illustrating the Referring in detail to the drawings, the numeral 5 indicates an outer casing including a cylindrical portion 8 and a substantially funnelshaped portion I providing a discharge neck 8 {or dust. The upper end of the cylindrical portion '8 is closed by a top wall 8 and connected 0! the casing and formed on the side thereof adjacent, the top wall is an inlet pipe III. This pipe may be suitable manner to a grain grinding machine so that the dust-laden air forced from the machine may pass directly into the casing I. Arranged centrally oi the casing i is a tubular sleeve II, the lower end of which termiconnected in any Figure 3 is a sectional view taken on the line 3-3 of Figure 1.

states at the beginning of the funnel-shaped portion 'I while the upper end terminates in a plane above the top wall 9.

A substantially conical shaped deflector l2 surrounds a portion of the sleeve II and is formed on the latter and spaced from the walls of the cylindrical portion 6 of the casing, The deflector I2 is located below the inlet pipe It! so that on the dust-laden air entering the casing it is caused to travel downwardly in a swirling motion into the tunnel-shaped portion 1 where the dust settles by gravitation and passes outwardly of the outlet neck 8 and may be collected in a suitable collection means connected to said neck, while through the sleeve l l and substantialthe air-'aises upwardly escapes from the upper end thereof ly free of dust. v

Struck-out portions it are formed on the substantially conical shaped deflector to assist in causingthe air to travel in a swirling motion, and to aid in the separation of the dust from the air by catching dust and directing it into the deflector where it may gravitate into the funnel-shaped portion of the outer casing 5 for discharge therefrom. However, should some of said dust be caught in an upwardly flowing I stream of air it may escape by way of the struckout portion-s l3 and become merged into the incoming flow oi dust-laden air for recirculation therewith.

A plurality of superimposed and staggeredly arranged baifles H are formed on the inner walls of the sleeve and depend downwardly and spaced naled in the upper portion of the sleeve and to I which a hand lever 21 is connected. Associated with the hand lever is an indicator plate 22 hearing suit-able indici-a to indicate the position ofthe dampers in accordance with the position occupied by a pointer or indicator 23 forming a portion of the attached end of the handle 2|. The indicator plate 22 has an arcuate slot 2 through which extends a bolt 25 of the hand lever 2|. A wing nut 26 is turned onto the bolt to engage the hand lever and thereby bring abouta binding of the bolt on the indicator plate for releasably securing the hand lever in its adjusted position.

It is to be understood that the links-l1 are pivotally connected to their respective dampers.

Arranged above the upper end of the sleeve I I and spaced therefrom is a hood 2! including a conical shaped member 28 and an inverted conical shaped member 29. The hood is supported by legs 38) fastened on the sleeve. The purpose of the hood is to deflect the air and spread the same in various directions as it leaves the upper end of the sleeve substantially free of dust.

The flow of air through the sleeve may be varied by varying or changing [the position of the dampers with respect to the baflles for the purpose of increasing and decreasing the action of the baflies on the air. The adjustment of the dampers is made in accordance with the amount of dust that may be in the air as it leaves the upper portion of the sleeve.

The opening 30' provided'in the sleeve ll connects the interior of said sleeve with the outer casing 5 between the upper and lower groups of baffles. There will be a certain amount of dust rising in the sleeve II which strikes the bailies and is directed outwardly by said baflles and may escape through the opening 30' to meet the incoming dust-laden air for recirculation therewith. This arrangement, to a great extent, will prevent clogging of the baiiles.

While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction,

made without departing from the spirit and scope of the invention as claimed.

Having thus described my invention what I claim is:

1. A dust collector comprising a casing having an air inlet and a dust outlet, a sleeve rising centrally from said casing and providing an air outlet, means carried by said sleeve and arranged in said casing to deflect the air from the air inlet downwardly in the casing with a swirling motion to the lower end of the sleeve for passage upwardly therethrough, staggeredly arfor regulating the flow of air through the openings of the baflies, and means for adjusting the position 01' the dampers.

2. A dust collector comprising a casing having an air inlet and a dust outlet, a. sleeve rising centrally from said casing and-providing an air outlet, means carried by said sleeve and arranged in said casing to deflectthe air from the air inlet downwardly in the casing with a swirling shaft.

combination and arrangement of parts may be 3. A dust collector comprising a casing having an air inlet and a dust outlet, a, sleeve rising centrally from said casing and providing an air outlet, means carried by said sleeve and arranged in said casing to deflect the air from the air inlet downwardly in the casing with a swirling motion to the lower end of the sleeve for passage upwardly therethrough, staggeredly arranged baffies arranged in said sleeve and having openings, hinged dampers carried by said baffles for regulating the flow of. air through the openings of the baflles, means connecting said dampers, an operating shaft journaled in said sleeve and connected with said means, and a releasably secured hand lever secured to said shaft, and a hood arranged above and spaced from the upper end of the sleeve and mounted on the latter.

4. In a device oi' the character described, a

casing having an air inlet and a dust outlet, a

ranged bafiles arranged in said sleeve and having I openings, hinged dampers carried by said baflies sleeve rising centrally from said casing and carried thereby, a substantially cone-shaped deflector mounted on said sleeve below the air inlet and spaced from'the walls of the casing, staggered baflies arranged in said sleeve and having openings, hingedly mounted dampers for-said openings, and an operating means connected to the dampers.

RAYMOND LITTLE.

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