USRE3332E - Improvement in grain-separators and thrashing-machines - Google Patents

Description

, UNITED STATES PATENT OFFICE.

IMPROVEMENT IN GRAlN-SEPARATORS AND THRASHlNG-MACHINES.

Specification forming parl ofLetters Patent No. 61,816, dated February 18m; Reissue No. 3,332, dated March 1b', 1869.

.T0 all whom it may concern:

Be itknown that we, ALVIN T. DUNBAR and ARCHIBALD MCNAUGIIT, of Alba, inthe county of Bradford and State of Pennsylvania, have invented certain new and useful Improvements.

in Combined rlhrashing-Maehines and Grain- Separators; and we do hereby declare that the foll'owing is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure 1 represents a vertical longitudinal section of our improved combined thrasher and grain-separator, taken through the lince a'y of Fig. 2, the black lines representing the highest thrusting position of the beating-bars or shakers, and the red lines the said parts in their lowestposition. Fig. 2 represents a vertical cross-section of the same, taken at the line y y of Fig. 1, the beaters being shown. as

occupying the same positions as in Fig. Il..y

Fig. 3 represents a plan or top view of a portion of the separati11g-platform, showing the slats which compose the platform, the slots through which the beaters play, and the, perforations for the passage of the grain.

Ve have described that the object of our invention isto furnish an improved apparatus for separating the grain from the straw as they come from the lthrashing-machine, and that the separating-machine is driven by the same power that drives the thrashi11g-machine and cleaning-mill in connection with which it is used, and should be set with its-open end toward the cleaning-mill, and at such an inelination as that the grain may pass freely along its bottom to the said mill. For the purpose of illustration, therefore, we have represented in red lines a thrashing-machine situated and combined with the separating vapparatus,4as

Vdescribed in our patent.

Our invention consists in the clnployment, in conjunction with a thrashing-machine and a longitudinally-slotted perforated stationary platform, of a series ofvertically-reciprocating and longitudinallymoving toothed beating and shaking bars operating through the'slots of said platform, upon whichA the straw is received in such mannerasto rise a considerable distance above the platform and descend entirely beneath it for the purpose of giving the straw an intermittent vertical movement by a quick upward thrust and a quick advance motion, thus obtaining two perfect jarring and shaking blows above the platform, so that be-A tween the succession of the upward and downward throws of the cranks of said beating-bars the straw will remain at rest and free from movement, which could not be eifectually obtained if the beaters did not thus dive down entirely beneath the plat-form.

Our invention also consists in the employment of aseries of vertically-reeiprocating and longitudinally-moving beating and shaking.

Our invention further consists in the coinbination and arrangement 'of/fa series of simultaneously vertically-reciprocating and longitudinally-moving beating and shaking bars and a longitndinally-slotted perforated stationary platform with a thrashiIig-machine, as will bc hereinafter more fully described.

In the accompanying drawings, A represents the frame or case of the separator of a rectangular form, open at both ends, and having an intermediate stationary platform, G, upon whielrthe separation of the grain from the straw is effected, while the bottoima', thereof receives and conducts the grain to the cleaning-mill.l rlhis separator in'clines upward from the thrashing-machine at such au angle as will prevent a too rapid passage of the straw over the platform, and at the same time insures the descent ofthe separated grain into the cleaning-mill by the inclined bottom a". The space between the topof the separator-case and the slotted platform forms the passage for the straw and grain from `the thrashing-maehine,

and the space between the bottom of said case and the bottom of the slotted platform forms ytween them.

I the clean-ngmill. The4 depthof lthis lower chamber must .be such as to admit of the freeaction of the toothed beating-bars or shakers Ein their vertically-reciprocating motion beneath'the platform,while the depthef the upper'chamb'er must-'be sufficient to allow said vbeaters'or shakers to act upon the straw without compressing it against the topv of the case.

' The. receiving and separating platform G is .provided*longitudinally with a Anumber of slots, g, corresponding to the number of toothed `beatingbars E which playthrough them; and the slats o'r strips G, which-constitute the platform, are provided with onel or 'more rows of holes, h, of suitable size, and at.4

proper distanccsapart, for-the purpose of allowing .the free passage of grain and chaff4 through the platfo1m,while the straw is moved over it and discharged from its highest end.

These perforated slats or strips G should be from four to six inches wide, andshould be placed at such distances apart as that the beaters E may move freely through the slots be- Beneath the stationary slotted platform G are arranged a series of longitudinal beating# bars o r shakers, E, having their upper s ides provided with a'series of teeth, c', of proper length.' Inthe drawings these teeth arerepresented as spikes; but they may be ofjany `other' `suitable form, and of suitable distances lapart.` These toothed beating-bars are of a length, less than that of the slots of the platform to admit of the longitudinally-reciprocatingv motion of the beaters therein and are mounted upon 'two 'crankshafts, B," having their .bearings in the sides a? and ai of the separating-machine, and which are placed one inthe forward and the other in the back part of said separator. The cranks and their beat-l ers are so arranged asto produce a reciprocat# ing motion of said beaters in every positionv in which they are placed, whether'rising or falling, parallel to the slotted platform', or nearly so. The'bearings of theshafts and the upward stroke of the branks B mustbe such as' that each revolution of said vcranks will,

thrustthe upper portions of the beating-bars E, with their teeth e', above the slotted plat- -form, so as to strike and lift the straw by theV bars from the platform with a l sudden sharp blow, therebylifting it entirely clear of said platform, so as to form va space betweenthe l^straw thus held up and the platform, y.which facilitates thc escape of the grain, while the downward stroke of the cranks will be suchas to bring thertoothcd beatingfbars beneath the platform a'distance sufficient to allpw them to move through considerable space before again striking the straw, thereby obtaining a thrusting blow, whichcould not be obtained if the bars and their teethvremained abovethe surface of the platform. The' top sides of the bars risc above the platform a considerable distance, andthe entire lifting action of the V.straw is produced by these bars, while the 'and equally effective.

e Y Y, 3,332

teeth performl lthe function of holding the 'straw Vand carrying it forward with the longitudinally-reciprocating movem'entof lthe beaters.

It -will thus be seen that'at'every advance movement of the straw over'the -platform the bodyof the straw is raised entirely above it,"

and is subjected 'to two severe shocks at each. throw ofthe cranks-the upward thrust from beneath while the straw is at rest throughout the/,length ofthe separator, and the sudden .throwing ofthe straw forward in a body against and upon the 'separator-platform by the sudden advance and descent ofthe toothed beaters entirely beneath the platform. By this 'construction and v arrangement it will beob# served that thev action upon the straw is intermitteilt, and that the platform constitutes a rest Vfor the body of the straw while the cranks. are passing through the lowest part of their str oke,`thereby causing' it to be struck a suc-' cession of sharp distinct blows, so as to jar and shake ont the grain. This result could not be obtained were the straw not thus left at -rest between each'blow'. To obtain this the cranks arel caused to make from one hundred and seventy-five to two hundred revolutions per'minute, and cach throw of the cranks causes the strawto advance in av body over A the platform about the length of a stroke, because the straw being held bodilyupon the bars willreceive thefull effect of their simull taneous forward throw.

The drawings represent the toothed beatving-bars as being attached to a' frame, F; but

we'prefer to connect them directly to the crankshaft B, as being more simple in construction To the ends of the Shafts projecting through one of the sides a are attached; drivewheels C, which are con nected to each other eccentrically bythecon- 'necti-ngrod D by wrist-pins fixed to the outer faces,4 of said wheels or pulleys, so 'that 'the said wheels and cranks may revolvetogether,

Vand thus effect the simultaneous .movement of thebeaters.' f'

'The separator and straw-carrier is driven 'by the same power'that drives the thrashingmachine and cleaning-mill by a band leading froma pulley on theshaft of the lthrashingcylinder, or from a pulley on the fanninglmill shaft to the nearest .pulley on' the crank-shaft of the separator.

vThe combined thrasher and' separator thus constructedand operated constitutes a simple and efficient mode of carrying away the straw from'a thrashing-machine, and effecting a separation of the grain therefrom. It is more simplev in construction, more perfect in its operation, is operated with less power than any other machine of equal capacity, and can do an equal amount of work in a given time, ata saving of at least two horses in power',

.and with far less loss of grain than in any other machine with which we are acquainted.

Having thus describedour invention, what 4. we claim is- 1. Aperforatedlongitudinally-slotted grain- 3. The combination of a thrashingemaehine,V

a perforated and longitudinally-slotted stationary platform, Gr,A and toothed beating and shaking bars E, operating substantially as described.

In testimony whereof We have hereunto signed our names.

ALVIN T. DUNBAR. v ARCHIBALD MCNAUGHT.

Witnesses:

V. M. WILSON, C. C. HooKEs.

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