US1569561A - Machine for grinding grain - Google Patents

Description

Jan. 12 1926.

G. E. MILLER MACHINE FOR GRINDING GRAIN Filed NOV.

25, 1924 2 Sheets-Sheet 2 ...I l lfllllllll INVENTOR WITNESSES @/m05 ATTORNEYS Patentedl Jan. 12, 1926.

UNITED STATESPATENT OFFICE.

GUSTAF E. MILLER, 0F STRATTON, NEBRASKA.

MACHINE FOR. GRINDING GRAIN.

Application led Novemberk 25, 1924. Serial No. 752,172.

and arrangements Vherein described andclaimed., A 0

An object of the invention is to provide a simple, reliable and efiicient machine of the character described which affords facilities for grinding, cracking or crushing grain rapidly and uniformly.

A further object of the invention is the provision of a machine of the character described which will discharge the ground, crushed or cracked grain for delivery to any desirable place.

Other objects and advantages will be apparent from the following description, considered in conjunction with the accompanying drawings, in which- Figure 1 is a side elevation of a machine embodying the invention, showing a feed dcflecting hood associated with the outlet thereof,

Figure 2 is an elevation of the structure exhibited in Figure 1, the view being taken at right angles to Figure 1,

Figure 3 is a transverse vertical section through the structure exhibited in Figure 1,

Figure 4 is a view similar to Figurel 2, with the hood omitted, i

Figure 5 is a side elevation of the machine with a feed elevating conduit associated with the outlet thereof,

Figure 6 is an elevation of the structure exhibited in Figure 5,`the view being taken at right angles to Figure 5,

Figure 7 is a fragmentary perspective view of the grating which is referred by me for use at the outlet of t e casing of the machine,

Figure 8 is a longitudinal vertical section through the grating.

In carryin out the invention I provide a substantia y 'drum-shaped casing comprising a substantially cylindrical body-1 rovided at its opposite ends with end memers 2 and 3 respectively.` The end mem- .portions ber 2 is formed with a central circular open.- ing 4 which constitutes the inlet of the casing.' The cylindrical body 1 is provided with an opening 5 which preferably terminates at its lower end at about-the level of the axial line of the casing. A fan 6 having radial blades 7 which terminate at their outer ends in proximity to but short of the inner wall of the cylindrical body 1 is rotatably supported within the casing in concentric relation to the latter in any suitable known manner, as by being secured on a shaft 8 which extends into the casing through a central opening in the end meinber 3, the shaft being rotatable and terminating within the casing short of the plane v of the end member 2, as is usual in blower fan constructions.

n The outlet opening 5 is covered by agrat- -ing 9 which may have the marginal'edge' portions thereof `disposed against the inner face of the portion of the cylindrical body 1 which margins the outlet opening 5 but which obviously may be disposed in a like position at the outer side of the cylindrical body. The grating 9 is attached to the cylindrical body by bolts 10 and nuts 11, the bolts IO-eXtending from within the casing through aligned openings in lapped of the grating and cylindrical body and the nuts being screwed on the outerends of the bolts, as shown. The bolts 10 and of course the nuts therefor may vary in number as desired. In the drawings. I show two bolts 10 at the upper end of the outlet opening and Vtwo bolts 10 at the lower end of the outlet opening but obviously I may make use of a greater or less number of bolts, if desired.

I prefer to make use of a grating 9 having perforations 12 formed therein by striking portions of the grating body inwardly to form guard lips indicated at 13 for the respective perforations 12. The end portions of the guard lips 13 are disposed in offset relation to the body of the grating and radially inward of theperforations 12 so that the yguard ribs prevent flow in a -straight radialdirection from the space within the casing through the perforations but permits entrance to the perforations 12 from the interior of the casing at one side.

vThe guard lips 13 are turnedwithin the feed is fed into the space rotating fan as they are swung inthe arc of a circle within the casing by the rotation of the fan. v

While the grating just described is that preferred by me, I do not wish to be restricted to the use of the specicy grating but can make use of gratings or screens of various descriptions and having perforations of various sizes and configurations and each provided with a guard lip or without a uard lip, as will be more ully understood rom the following recitation of the operation of the machine.

The operation of the machine is substan. tially as follows: The grain that is to be' ground, cut, cracked or crushed to provide within the casing through the inlet opening 4 and is struck by the fan blades. Any suitable known means may be employed tov feed ain through the inlet opening` 1, and I t erefore have not illustrated or described any particular means for feeding the grain through the opening 4 into the casing of the device. The impact of the quickly moving .fan blades on the grain tends to break or cut the individual grains and as the fan rotates the whole grains and the portions of grain are thrown at high velocity against the grating and will be further broken and cracked because of vthe impact thereof against the grating, particularly in view of the provision of the guard lips at the inner side of the grating. The portions of grain which are suiciently small to pass through the apertures 12 will be forced therethrough as the fan rotates, both because of pressure therea ainst as other grains are thrown and ushe outwardly against the grating b the an blades and because of the force 'o Athe air blasts which are caused by the rotation of the fan in the casing. The grains which are not broken or ground between the rotating fan blades and the grating' suiciently Asmall to pass through the perforations 12 as a result of the initial impact with the grating will be carried around within the casing `by the rotating fan and will be thrown and pressed against the grating 10 until they are suliiciently small to pass outward from the 'casing through the perforations 12.

' The matter which passes through the perforations 12 may be deflected or conducted to any desirable place. In Figures 1 to 3 inclusive, I show a deflecting hood, indicated generall at 14, which is attached to the casing of t e device in position to deflect the matter which passes through the perforations 12 downwardly. The hood may comprise a pair of parallel side members 15 which straddle the ends of the vcasing at the sides of the openings 5 and are connected at their outer ends by an end member 16 and at their upper ends by a top member 17. The outer end members 16 and the top member 17 may be integral with the side members 15 and also may be joined integrally with one another, as shown. rlhe top member 17 is separated from the side members 15 for a slight distance from the inner end of the hood by incisions which extend along the side edges of the top member from the inner Vend of the latter, thus providing an attaching end portion 17a which is secured to the body 1 of the casingof` the device by the same bolts and nuts 10 and 11 respectively which areused to secure the upper end portion of the grating y9 tothe body 1.

IVith the arrangement just -mentioned,'

matter passing through the perforations 12 into the hood will be deflected downwardly through the opening between the lower ends of the outer end members 16 and the side members 15 of the hood and the adjacent portion of the body 1 of the device. The hood proper can be bent relatively to the attaching portion 17a along the line of juncture of the attaching portion 17a with the major portion of the top member 17 to vary the distance between the lower end of the outer end member 16 and the proximate portion o-f' the body 1 of the casing, whereby both the direction of deflection o-the matter passing from the hood and the effective area of the openingthrough which matter passes from the hood downwardly can be varied within a considerable range.

In Figures 5 and 6, I show an arrangement .for conducting the matter which passes through the perforations 12 upwardl from the casing of the device. To this en I make use of a tubular conduit 18 whichis shtted and opened out for a short distance from its lower end to provide a pair of side flaps 19 which are arranged in straddling relation to the ends of the casing of the device at the side of the opening 5. `Vertical wallsof the conduit 18 are bent to position to closely overlie the body 1 both above and below the opening 5, as indicated at 20 and 21 respectively and are secured to the body- 1 of the casing by the same bolts and nuts which are -used to secure Y the gratingy 9 to the body of the casing. Matter passingy 1'15 upwardly through the conduit 18 by the through the perforations 12 will be blown wind blasts from the fan 6 through the conduit 18 which of course may lead to any desirable place. j

For example, the machine can be used for elevating grain without grinding, crushing or cracking it. For this use of the machine, the construction exhibited in Figures 5 and ,6 with the grating 9 omitted is employed, the grain being blown fromthe fan casing through the elevating conduit 18 to,y any de-` sired place. Y e

4Obviously, my invention 'is susceptible of embodiment in forms other than those illustrated in the accompanying drawing and I of the cyllndrical body i therefore consider as my own al1-such modilications and adaptations of the vforms of the device herein described as fairl fall within the scope of the appended claims.

Iclaim:-` i

1. A device of the character' described comprisin a casing having a substantially cylindrica bod v and end members at the ends of the b y, one of said end members having a central inlet opening, Asaid cylindrical body being formed with an outlet opening, a fan mounted to rotate within said casin in concentric relation to said c lindrica body, the ends of the blades o the fan assing'in proximity to the inner wall but being spaced from the latter, and a grating covering said outlet opening, said gratin comprislng a ipllate having portions struck'inwardly thereom at intervals throughout its area to provide perforations and inwardly extending guard lips-for the perforations, each of sai guard lipsl havin the free end thereof facing the outer en portion of each blade of the fan as that blade is 'moved close to the outlet'openin ofthe casingV during the rotation of the an. 2. Al device of` the character described comprisin a casing having a substantially cylindrica bod and end members at the ends of the bo y, one of said end membersl having a central inlet opening, said cylindrical body being. formed with an outlet opening, a fan mounted to rotate within said casin in concentric relation. to said c lindricalP body, the ends of the bladeso .the fanv assing in proximity to the inner wall of. e cylindrical body but being spaced in the casin from the latter, an'd a grating covering said outlet opening, said grating com rising a plate having portions struck inwar ly therefrom at intervals throughout its area to rovide dperforations and inwardly exten in guar lips for the perforations, each of vsai guard hps preventing radial ,movement of vmatter from the center of the casing through said perforations but permitting entrance to said perforations from the space within the casing in a direction extending obliquely to radial lines from the center of the casing to said perforations.

3. A machine of the character described comprising a fan casing' having an outlet opening inthe periphery thereof and having a lateral inlet, a fan mounted to rotate witha grating covering the outlet opening, an in position to deflect matter passing from the perforations of the grating downwardly from the casing, the body of said hood being adjustable in res ect to the casing to vary the direction of eflection of said matter from the ho'od and to vary the eective area of the space Iwithin said hood between adjacent walls of the hood and fan casin 4. In a device ofthe character described,- a grating comprising a plate havingportions struck laterally thereof at intervals throughout the area of the plate thus providing perforations and guard lips therefor,

the free end portions of said guard lips being disposed in offset relation tothe body of the plate and partly covering said per.- forations. y

GUsTAF E'. MILLER.

a hood attached to said casing'

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