US1461144A - Screen for corn shellers - Google Patents

Description

1,461,144 R. E. HANNEMAN SCREEN FOR CORN SHELLERS I Filed Sept. 9, 1920 2 Sheets-Sheet 1 July 10, 1923. EAQLMM R. E. HANNEMAN SCREEN FOR CORN SHELLERS Filed Sept. 9, 1920 2 Sheets-Sheet 2 I ooqooopgpgoopqo nnmof Patented July 10, 1923.

D :S TAT ES 'RIGHARD;E.VHAN1\T E.MAN; OF EAST MOLINE, ILLINOIS, ASSIGNOB T DEERE & COM- PANY, OE MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

SCREEN FOR CORN SHELLERS.

Application filed September 9,1920. Serial No. 409,048.

" that:such-kernels have been separated from are: otherwisevremoved from the surface of the I screen. .Inumachines of this character itis common to provide such screening devices withs means 'iior 'preventing some of the shelled corn frompassing oif'atthe end of the screenwith the cobs-due to the oscillating and vibratingofthe screen, instead of passing-throughtheholes of thescreem-as intended. Such means for preventing the 2 escape of some of the kernels are in the form -of:-cross -=pieces on the faceof the screen adjecent-to'that' end-at which the cobs leave the screen an d, :soiaras I- am aware, such cross+pieces-or dams as they are usually ternied have been fixed in position. Such "fixe'drposition ofthese dams has been found unsatistactory for the reason that if the screen is vibrated-attoo -greatwaspeed quite an amount of the shelled corn will not have time'or opportunity 'to escape through the screen openings but will be carried over-such damswithth'e cobsand be lost. On the otherhand if the screen is vibrated at too slow aspeed the cobs will fail to be prop- 4o erly-carried' overthe dams and will accumulate on the screen and thus act to detract from the efliciency-offthe screen with respect to permitting the kernels-of corn to drop through thesereenropenings. It is the object of my invention to so improve the i said screeningmember that-the-dams referredto --may -be: adjusted to: and :heldin-"difierent an- :gular positions with respect-to tliesurfaoe of thescreen; so that theymay act *properlyand veitectively as toibcth theshelled corn and the cobs regafidlessxof-thespeed with which the screen is vibrated. Other'obj ectsiof the invention rare-tease "construct and arrange the several dams-with such screen will '55 ordinarily be provided that they will have most one.

connection with a commonactuating device soi-that they-may be simultaneously adjusted, and also to so construct them that in-each adjustment one dam will varyfromanother dam with respect to the degree of angularity that .it projects from the scree-ns surface, -Ithe-attaining ofthe last-named objectbeingdesirable because of the fact that in view of the manner in which the screenis pivotallyhung the amount of up and down swingingmovement of the outerend thereof is less thantowards its other end, and consequently it=isdesirable that the height of'the dams diminish from the innermostto the outer- I attain the objects'specified by the construction and arrangement of parts hereinafter more particularly described.

In the drawings,-

Fig. 1 is a longitudinal vertical section through a well-known type of power-operated corn sheller, the uppermostvibrating screen of which is provided with my improvements;

Fig. 2 is a plan view of a portion of a screen embodying my improvements;

Fig. 3 is a longitudinal section taken at line 83 of Fig; 2 and showing the dams adjusted to their lowest position;

Fig. 4; is a view similar to 'Fig. 3 but showing the dams raised. to their highest position; and

Fig. 5 is an end view of the means for adjusting and: locking the dams in their dif ferent positions.

Referring tothedraavings, and particularly now to Fig. 1 wherein is shown a power-operated corn-sheller of a'Well-lmown make, the following is a brief description of so much of the machine as; is necessary to-a clear understanding of the advantages attained by the use of my improved: screen in such a machine; 10'indioates' the body of the shelling machine supported as usual by wheels 10. The corn tobe shelled is elewhichin turn isdriven througha pulleylti that will be belt-connected with a-suitable source of 'power,-su,ch as atractoryfor example. after passing through the shelling'means' 13,

Thecorn, the cobs and'the husks all drop onto an upper" screen-17- which 8111- bodies my improvements that will be particularly described hereinafter. Such screen is suspended in the body 10 by links 18 that have pivotal connection at 19 with such body and at 20 with the screen, and because of the fact that the links near the outermost end of the screen are a little longer than the other links the up and down movement of the outer end of the screen is less than its other end when such screen is vibrated as usual. The screen is given the required vibrating and oscillating movements in the construction shown, through a pitman 21 pivotally connected at one end to the screen and at its other end to an eccentric 22 mounted on a shaft 23. On this shaft is also mounted a gear 24L that is driven from the gear mechanism 15. 25 indicates the usual lower screen with which machines of this type are provided. It is suspended below the screen 17 by links 26 pivotally attached at their upper ends at 27 and at their lower ends to said lower screen at 28. This lower screen is moved through a pitman 29 connected to an eccentric, which, like the other eccentric, is mounted on the shaft 28. In each of the screens are a series of openings 31 of a size to permit the kernels of corn to pass through. Such kernels in passing from the lower screen enter a trough 32 from which they are elevated to the point of discharge by the usual elevator 33. The husks and cobs that lie upon the upperscreen 17 are advanced toward the outer end of such screen by the engagement therewith of the usual inclined spikes 34ron such screen. The husks and lighter particles of material are removed by means of a suction fan 35 but the cobs are kept moving towards the outer end of the screen and fall from such end into a hopper 36 from whence they are carried away by the usual elevator 37. 35 indicates the usual blower fan that is provided for removing any small light particles that may be deposited with the kernels upon the lower screen 25.

In place of the usual dams that are fixedly carried by the outer end portion of the upper screen 17 and act to retard to some extent the passage of the cobs toward the discharging end of that screen and that are intended to entirely prevent corn kernels passing over such end with the cobs, I have provided a series of adjustable dams that may be set so as to stand at varying angles to the surface of the screen in order that proper ejection of the cobs may at all times be secured regardless of whether the screen is vibrated slowly or rapidly and at the same time will ensure against the corn kernels being carried over the end of the screen with the cobs. Each dam, indicated by 38, is formed of acomparatively long narrow strip and extends transversely across the screen over the upper surface thereof, the several dams of the series lying parallel with each other and spaced a short distance apart. At each of its ends each dam is hingedly secured to one of the side bars of the screen, the hinges, in the construction shown, (see Fig. 2) being located adjacent to the inner or lower edge of the dam so that such edge will always lie close to the surface of the screen and thus prevent the wedging of any material between the screen and dam. Each dam has secured to its upper face, by riveting as shown or otherwise, an arm formed of a strap of metal that at the lower edge of the dam is bent downwardly and projects through an opening in the screen, as clearly shown in Figs. 3 and 4:, said downwardlyturned portions in effect constituting handles by means of which the dams can be turned on their hinges. Said arm members are indicated by 38; they are secured in place on their respective dams so as to be in alinement with each other, as clearly shown in Fig. 2 and are preferably arranged substantially midway of the'length of the dams. In the down-turned portion 39 of each arm, in the construction shown, is a hole, and as such holes are in alinement with each other provision is thus made for connecting the several members 3839 together by a rod extending through the holes. Such a rod is indicated by 40, and as shown it is connected with each downwardly-turned portion 39 by means of two' cotter-pins 41 passing through the rod at opposite sides of thepart 39. At its outer end the rod 40 is supported in a bracket 42 secured to the end rail of the screen. A wing nut 43 on the screw-threaded end of the rod furnishes the means by which the rod 40 can be adjusted longitudinally, and, as will be understood, the extent to which the rod is so adjusted will determine the degree to which the dams will be swung up or down.

As clearly shown in Figs. 3 and 4: the bends given to the metal straps 38 39 are different one from the other, the result being that each dam is at all times held at a slightly different angle than the angle of any other dam, and they are so arranged on the screen that the innermost damstands at the greatest angle to the screen and the outermost one at the lowest angle,-in other words, the angles at which the dams stand progressively decreases from the innermost to the outermost dam.

By my improvements the dams can be easily, quickly, accurately and simultaneously shifted to stand with respect to the surface of the screen in such positions as best enable them to perform their stated functions under the varying speeds that may be imported to the screen.

What I claim as my invention and desire to secure by Letters Patent, is

l, The combination with a vibratory screen, of a plurality of dams spaced a distance apart and extending over the surface of the screen and projecting from such surface at different angles, and means for varying the angular position of the dams while maintaining them at different angles relatively to each other.

2. The combination with a vibratory screen, of a plurality of dams connected together and spaced a distance apart and extending over the surface of the screen and projecting from such surface at different angles, and means for simultaneously varying the angular position of the dams while maintaining them at different angles relatively to each other. i

3. The combination with a vibratory screen, of'a series of dams spaced a distance apart and extending over the surface of the screen and projecting from such surface at different inclinations, the degree of inclination of the dams varying progressively from one end of the series tothe other.

4. The combination with a vibratory screen,'of a series of dams spaced a distance apart and extending over the surface of the screen and projecting from such surface at different inclinations, the degree of inclination of the dams varying progressively from one end of the series to the other, and means for varying the inclination of each dam while maintaining the said progrcssive variation in inclination.

,5. The combination with a vibratory screen, of a series of dams connected together and spaced a distance apart, said dams extending over the surface of the screen and projecting from such surface at difierent inclinations, the degree of inclination of the dams varying progressively from one end of the series to the other, and means for simultaneously varying the inclination of each dam while maintaining the said progressive variation in inclination.

6. The combination with a vibratory screen, of a plurality of pivoted dams spaced a distance apart and extending over the sur face of the screen, a member secured to each dam and projecting through the screen, each of said projecting portions of such members being inclined at a different angle to the surface of the screen, a longitudinallymovable rod connected with said differentlyinclined projecting portions, and means for adjustably connecting said rod with the screen frame.

7. The combination with a vibratory screen, of a plurality of pivoted dams spaced a distance apart and extending over the surface of the screen, a member secured to each dam and projecting through the screen, each of said projecting portions of such members being inclined at a different angle to the surface of the screen, the inclination of said portions varying progressively, a

longitudinally-movable rod connected with said differently-inclined projecting portions to maintain them and the dams that they are respectively connected with in said progressively-inclined positions, and means for adjfustably connecting said rod with the screen rame.

RICHARD E. HANNEMAN.

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