US638429A - Apparatus for drying grain. - Google Patents

Description

Patented Bac. 5, |899. W. TWEEDALE W. L.- HARVEY.

APPARATUS FR DVHHi GEMM,

` (Application :ma .my 12, 1899.)

(No Model.)

i. y. 7 ,y` nf,"r 'Yr limitan .eterne idafirnnr vVlLlM TWEEDALE AND WlLLlAM L. HARVEY, Olt CHCAGO, ILLlNOlS.

.ernannten een envian. canin.

SPECKFIOATIQN forming part of Letters Patent No. 638,429, dated December 5, 1899.

Application iiled July l2, 1899: Serial No. 723,548. (No model.)

To @ZZ whom it may concern.-

Be it known that we, WILLiAM 'lwnnDaLn and WILLMM L. Hnnvnv, residents of Chicago, in the county of Cook and State of lilinois, have invented certain. new and useful Improvements in Apparatus for Drying Grain, of which we declare the following to be a full, clear, and exact description.

rhe present invention has for its object to provide a simple, cheap, and effective apparatus whereby grain may be quickly and uniiormly dried; and the invention consists in the features of construction hereinafter described,illustratcd in the accompanying drawings,and particularlypointed outin the claims at the end oi' this spcciiication.

Figure '1 is a view in central vertical section through an apparatus embodying our invention. Fig. 2 is an enlarged detail View of one of the air-port guards.

Upon a suitable foundation A are mounted three walls or cylinders l, C, and l), preferably of sheet metal, concentrically arranged, these several cylinders B, (l, and l) being preferably formed ci horizontal sections suitably united together. The outer wall or cylinder l5 and the in terinediate wall C are united together by the top plate or cover E, from the center of which a grain-delivery spout e rises. rlhc top of the cylinde. D is closed by a cover D', preferably of conical shape, in order to better distribute the grain as it enters the drier. Into the bottom ol. thc cylinder l) leads a hot-air-dclivcry pipe F, through which pipe het air will be forced by a suit-able blowerG. At convenient points from top to bottom of the cylinderl) are termed air-discharge ports d, through which the hot air will be 4,forced into the body of grain to be dried, this body ci' grain iilling the annular' chamberbetween the cylinders C and D. In like manner also a series of air-ports c will be formed in the wallcr cylinder C,and the air passing through these ports c will escape through the short pipes 71, into the bustle-pipe Il, whence it will be removed by the dischargepipe 71,. The bustlepipe il, which is preferably of annular shape, will surround the top of the wall or cylinder Rand the short pipes h will connect this bustle-pipe with the cylinder B at convenient intervals around the top of such cylinder. As

the grain to be dried will occupy the space lie-- tween the walls or cylindc4 s C and l), we provide the ports c and d with suitable guards l( to prevent the passage of grain through these ports. '.lhe preferred construction of guard is that illustrated in detail in Fig. 2 ot' the drawings, and consists of a quadrant-shaped cup having an open top and having a hole k adapted to coincide with the corresponding ports c or d, over which the guard will be liastened. [it the base of the wall or cylinder D is formed a series of openings through which the grain will pass downward to the base of the drier from the ann.ilar space between the cylinders C and i).

In order to regulate the passage oi the grain, and conscrpicntiy the extent of time during which it shall remain within the d rior, we provide the base of the drier with a suitable valve mechanism, one convenient form of valve mechanism being that illustrated in the drawings. As shown, this valve mechanism consists of two corresl'ionding grids 'nl and m, tho grid fm. being fixed, lwhile thc grid fla is movable, so that the open space of one grid may be caused to coincide more or less with. the open space of the other grid, the extent of such coincidence detcrniining the rapidity el the discharge of the grain. To the grid 'la is connected a shifter-rod fn., that will b e operated by aliand-lever/1t, pivotcd at one side of the apparatus. The valve mechanism shown is of familiar construction, and it is obvious that any suitable form .of valve mechanism maybe employed in place thereof. The grain after being dried will descend into the space l? at the base oi the apparatus, from whence it woll be removed by any convenient means.

From the foregoing description it will bc seen that when a bodyeii' grain is to be dried it-will be delivered through the spout e in to the annular space between theI walls or cylinders C and l). A blast of het air will then bc admitted 'through the air-delivery pipe F, and this air will be forced through the ports d, through the body of grain, through the port-s c, and will iinally escape by the bustlc-pipe Il and discharge-pipe il. The arrangement of ports c and d is such as to insure a uniform. drying of the grain, the body of grain being subjected not only to the hot air passing" through it, but as Well also to the heat oi' the Walls of the cylinders C and D. '.ihe ar- IDO rangement of the bnstle-pipe 1I and the airpipes h around the top of the cylinder I3 also aids in securing the uniform withdrawal of the air, amd consequently a more uniform passage of the heated air through the grain.

We are well aware that various forms of apparatus have been heretofore devised for drying grain; but we believe that no prior grain by reason of the odors, dirt, the., as to ruin it even if it did not set lire thereto. Moreover, in such prio: construction no pro-v vision Was made for preventing the passage of grain through the perloi'ations of the vertical cylinders. ConsequentlyY if the perforr, tions of the cylinders were large enough to allow the passage of air therethrough without clogging up, such perforations would also permit the low'of grain through the cylinders, and thus defeat the operation of the apparatus. Our present invention overcomes all of the above objections. ln our apparatus heated air free from products of combus- I tion is delivered to the drier, and inasmuch as the perforations olfnhe cylinders are provided with upwardly-extending guards these perforations can be made ofsullicient size to permit the passage ot air through the cylinders and through the grain without danger of the escape of grain throughI the walls of the cylinders.

While the al'Jovedesc1ibed apparatus is more particularly designed for the drying of grain, it is obvious that it can also be used for the purpose of cooling grain either after it has been dried or where no Aprelimineny drying has been had. So, also, instead of elnploying a blower G for effecting a forced draft of air the suction fan or blower might be at,- tached to the outlet-pipe to accomplish the same purpose.

Having thus described our invention, wha

We claim as new, and desire to secure by Let ters Patent, is'- l.. A drying apparatus comprisinga vertical outer Wall or cylinder B, a vertical inner wall oi cylinder D having a closed top, and an intermediate vertical wall or cylinder C, all of said walls being formed of thin metal, said inner and intermediate walls or cylinders being provided with air-ports, upwardlyextend= ing guards. secured to the inner wall of the inner cylinder and the outer Wall of the intermediate cylinder opposite said-airports to prevent the'passage of grain through'said ports, an air-delivery pipe leading to the bottom of said cylinder D, and an air-discharge passage for the escape of air from the top of the chamber formed by the cylinders B and C.v A

2. A drying apparatus comprising a vertical outer wall or cylinder B, a vertical innervall or cylinder D having a closed top, and an intermediate lvertical Wall or cylinder C, .all vof said walls being formed of thin metal', said inner and intermediate walls being provided with air-ports, upwardly-extending guards secured to the inner wall of the inner cylinder and the outer Wall of the intermediate cylinder opposite said airports to prevent the passage of grain through said ports, an airdelivery pipe for conducting air free from products of combustion to the bottom of said cylinder D, and a series of air-discharge ports for the escape of air from the top of the chamber formed by the cylinders B and C.

. WILLIAM TWEEDALE.

XVILLIAM L. HARVEY. Witnesses:`

GEORGE P. FISHER, Jr., ALBERTA ADAMICK.

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