US 825381 A
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PATBNTED JULY 1o, 1906.
G. D. COLEMAN.
APPARATUS POR MINGLING PINBLY DIVIDED SOLID SUBSTANGES WITH A BLAST 0F AIR.
APPLIUATION FILED 002m, 190s.
w WM narran sfrafrns` earner oriana GEORGE-D. OOLEB'IAN, OF BOSTON, MASSACHUSETTS. APPARATUS FOR MINGLING FlNELY-DlVlDED SOLID SUBSTANCES WITH A BLAST 0F AIR.
Yatented July 10, 190B.
Application led October 9,1903. Serial No. 176,496.
To all whom, it may concern:
Be it known that l, GEORGE D. COLEMAN, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful .improvements in Apparatus for Mingling Finely-Divided Solid Substances with a Blast of-Air; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
The present invention relates to apparatus for mingling finely-divided solid substances with a blast of air.
It is particularly adapted for use in inaking antifouling coatings, such as are described in United States Patents granted to me, No. 629,426, July 25,. 1899, and Nos. 682,913 and 682,914, September 17, 1901, as well as for other purposes apparent to those skilled in the art. rihe operation of apparatus of this nature, as has heretofore been used, has been unsatisfactory, owing to the tendency of the'finely-divided solid material to choke and pack and the difliculty of providing simple and eective means for feeding the material constantly and freely. This difeulty is particularly marked in the use of metallic powder, especially if the grains are coarse. I
The presen-t invention contemplates gen-.
erally a receptacle for the comminuted material, means for producing a blast of air,.and means for mingling the comminuted material with the air-blast, and its purpose is to produce improved means for feeding the material uniformly and freely and to reorganize,
simplify, and improve devices of the` above-r described nature.
ln the drawings accompanying this specication, Figure 1 is a vertical section of my improved apparatus. Fig. 2 is a plan of the same, and F ig. 3 Vis a horizontal section on line 3 3, Fig. 1.
The illustrated embodiment of the invention is constructed as follows: A closed cylindifical tank 1 serves as a reservoir for the cornniiriuted material and for the air for producing Jche blast, `uid also contains a part of the mechanisms for producing the air-blast and for feeding the material. A screw-plug 2 gives access to interior ci the tank for filling the same, or for a purpose to be described later. A hand-pump for com ressing air is mounted for convenience in t e cover 3 of 'the reservoir TYray charged through an opening 4 m the bottom of thpump-cylinder 5. Thenceit passes 12p a tube 6, through a check-valve 7, and is 'scharged near the top of the tank and above the level of the comminuted material con-1 tained therein. The air for the air-blast passes through a valve 8 and down a tube 9, which is connected by a nipple 10 to a piece of flexible tubing, terminating in a suitable the tank. The air from the lpump is dis-v i nozzle (not shown) for directing the blast.
The comminuted material is allowed to mingle with' the air-blast by opening a valve 11i7 which controls a feeding-passage 12, connecting the hopper-shaped bottomfof the tank with the air-blast tube 9. lA plug 13 gives. access to this passage to clear it if it becomes choked. 15, conveys air from the upper part of the tank to a nozzle 16, opening near the passage 12. Rings 17 17 serve for the attachment of a strap, by means of which the apparatus may be convenientlyl carried by the operator. A socket 1S and a set-screw -19 are provided by means of which the device may, when de- A tube 14, controlled by a valve sired, be attached to an upright on a standq which may be stationary or movable.
The operation of the ap aratus 1s as follows: The tank is )artly iil ed with the lcomminuted materia -e. gl, copper -jilings-LY through the filling-plug 2. The pump is nextA 4 operated, and the valve S is opened to permit a current of air to pass Athrough the nipple and the iiexible tube to the spraying-nozzle. The valve 11 is opened sufliciently to allow the proper amount of copper-filings to mingle The valve 15 also is opened, and air pass/es down the tube 14 and out of the nozzle 16. This air causesa stream of air to pass down the feeding-paswith the air-blast.
sage 12, whereby the movement ofthe cop-1.
per is greatly facilitated and choking Ao passage is prevented. The mingled copper and air traverse the flexible tube, and the copper is discharged therefrom in a spray. he operator directs the jet against the surface of Wet paint or other binding material IOC and simultaneously operates the hand-pump to maintain the blast. If desired, the plug 2 may be removed, and the air-pressure in be obtained-by connecting the opening .ith a source of compressed air, and in such case the operation of the apparatus is identically the same as above described except that the airump is idle.
I am aware that it has een proposed in "apparatus vof Athis character 'to rovide a osed receptacle for comminute material 'and to app y air-pressure to such receptacle for the purpose of facilitating the discharge Of the comminuted material om rmy invention in important respects, and particularly by the fact struction thercomminuted material impedes the iiow of air therethrough and 'diminishes the volume of air passing through the feedf assage whereas in m construction the air Which facilitates theiiow of comminuted mal terial through the feed-.passage is delivered sists in t 3o.
at a point near such feed-passagehas heretofore been air and the material An important feature offmy invention `con. e introduction of air into the mat-el' rial to be fedl at a point near the delivery-opening and in the relation of the parts, whereby increased sniplicity and eiiiciency are gained.
y vided soli Viinely-divided material,
Having thus described my invention and 'D its mode of operation, I claim as new and desire to secure by Letters Patent- 1. An a paratus for mingling nely-divided' solid) substances Witha blast of air, having, in combination, a receptacle for the means for producing an air-blast, means for feeding the said Vmaterial into the air-blast, and means for introducing air into the said material at a point near the passage through which the material is admitted to the air-blast, substantially as descriiIfd. f -1 l d 2. a aratus or min in e idubstancee withga lilast ofT air., having, in combination, a rece tacle for the finely-divided*material, means or producing a blast of air, a passage through which the said material may be admitted into the airblast, and means for causing a current of. air to traverse said passage and facilitate the therefrom; butT Sufh construction is clearly differentiated that in such con- In my device by combin-' passage of the said material therethrough, substantiallyas described.
3. An a paratus for nelydivided solici) substances With'a blast of air, having, in combination, a receptacle for the finely-divided material, means for supplyin compressed air,` a valve-controlled aireblast assage from said means, a valve-controlled air-blast passage, and a valve-controlled passage from the air-supplying means to a point in the receptacle adjacent to the feeding-passage, serving to create a current of air through the feeding-passage to facilitate the feeding of the material therethrough, substantially as described. y ,4 y
4. Any-apparatus for minglingrinely-divided solid vsubstances with a blast of air, having, in combination, a rece tacle for the iinely-divide'd material, means or producing a blast of air, 'a feed-passage through which the said material is'fed from the rece tacle, l
and an air-passage having an outlet directed toward the feed-passa e sage of the material t t'al 1 ly as described.
erethrough, substanvided soli substances with a blast o having, in combination, a receptacle, means for supplying said receptacle 'with 'compressed air, a passage from the upper part of said recepta e, a connecting -passage from the' lower part of vsaid, receptacle, a passage from the u per part of said, receptacle to the lower part t ereof, and valves controlling said .passages, substantially 'as described. 6. An a paratus fory mingling finely-'di- .vided solidD having, in combination, a tank, an air-pump delivering into said tank, a delivery-passage, a passage for conducting airfrom said tank to said delive -passage, a passage for conducting materral to be sprayed from `'said' tank to said delivery-passage, and a passage for conducting air from said tank `to said' assage for conducting material, substantially as escribed.
In testimony whereof I ailx in presence 'of two Witnesses.
' GEO. D. COLEMAN. Witnesses:
FRED O. Frsrr.
my signature to facilitate the pas- 5. An a paratus for finely-die.
' air substances 'with a blast of air,`
ceding-passage from the receptacle to the