US1422023A - Thrashing machine - Google Patents

Description

E. BO E.

THRASHING MACHINE. APPLICATION FILED AUG-20, I920. LQQ QZS Patented July 4, 1922,

2 SHEETS-SHEET I.

25 mum/r01? fddfioe BY flaw/7%.

A TTOR/VEVS THRASHING MACHINE. APPLICATION FILED AUG.Z0, 1920.

Patented July 4, 1922.

2 SHEETSSHEET 2.

IN V5 11/ T01? A TTOHIVEYS STATEfi QEFFEQE,

EDD 130E, OF CLEABBROOK, MINNESOTA, ASSIGNOR OF ONE-FOURTH TO IRVIN DE'WITT KRETSER, 0F CLEARBROGK, MINNESOTA, ONE-FOURTH TO DUSTIN W'ALL-AGE MG- NABB, OF WINNIEEG, CANADA, AND ONE-FOURTH. TO EDWIN ARCHER HALSETH,

OIE CLEARBRO OK, MINNESOTA.

THRASHING MACHINE.

' Application filed August 20,

To all whom it may concern Be it known that I, EDD Eon, a citizen of the United States, and a resident of Clearbrook, in the county of Olearwater and State of Minnesota, have invented a new and use ful Improvement in Thrashing Machines, of which the following is a full, clear, and exact description.

My invention relates to improvements in thrashing machines, and it consists in thecombinations, constructions, and arrange ments herein descrlbed and claimed.

An ob ect of my invention 1s t0'proV1 de,.-

in a thrashing machine, a quick means of thrashing the unthrashed grain that has fallen onto the sieve, which at the present time takes a circuitous path, going through the tailings auger, the tailings elevator into the thrashing cylinder, and through the whole machine, thus taking up the room of the new grain.

7 provide, in a thrashing machine, a device of the type described which is positive in operation, simple to install, and does not easily get out of order.

' Other object and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which- Figure 1 is a section through a thrashing machine, showing the device installed,

Figure 2 is an enlarged side elevation of the device in closed position,

Figure 3 is a plan view, taken on the line 33 of Figure 2,

Figure 4 is a section taken on the line 4-.4 of Figure3,

Figure 5 is a s1de elevation of the device in open position,

Figure 6 is a sectional view of an enlarged portion of the device.

In carrving out my invention, I make use of a thrashing machine 1 of known construc- Specification of Letters Patent.

Patented July 4, 1922.

1320. Serial No. 404,887.

tion (see Figure 1) in which a thrashing cylinder 2 is disposed between a chalfer 3 and a sieve 4. The thrashing cylinder 2 has longitudinally extending slats 6 having a plurality of teeth 7 integral with said slats. The thrashing cylinder 2 is keyed to a shaft 8, said shaft having a pulley 9 mounted at one end (see Figure 3). A casing 10, concentric with the periphery of the thrashing cylinder 2, encircles said thrashing cylinder. It will he noted that the chafier 3 extends to within a spaced distance from the casing. Disposed between the casing 10 and the teeth 7 of the lower half of the thrashing cylinder 2 are a plurality of longitudinally extending concave bars 11 having a plurality of teeth 12 integral therewith. The teeth 7 of the thrashing cylinder 2 are disposed between the teeth 12 of the arcuate slats 11.

A roller 13 made fast on the shaft 14 is corrugated longitudinally and, laterally. A pulley 15 is fastened on one end of the shaft 14. A disc 16 is loosely mounted on the other end of the shaft 14. Pivotally mounted on the disc 16 by a screw 16' is an arm 17 having a longitudinally extending slot 18 at its free end. A ratchet wheel 19 is fastened on the shaft 14 and is adjacent to the outer surface of the disc 16. A pawl 20 pivotally held by a pin 21 is adapted to come into engagement with the ratchet wheel 19. A spring 22, encircling the screw 16', acts as a washer for the arm 17, thus spacing said arm 17 from the disc 16 so as to allow the ratchet 19 to pass freely under it. One end of the spring 22 engages the head of the pawl 20.

A false bottom 23 has one of its longitudinal sides made fast to a rod 24. The rod 24 is jourualed in-each of the side walls of sieve 4, thus assuring a continuous passage way from the sieve 4 to the thrashing cylinchaff from the grain threshed by the cylinit to the thrashing cylinder 2, but the bolt," being thicker than the grain, forces the false ing fan.

der 2, with the roller 13 normally acting as a feeder of the grain to the drum 2.

From the foregoing description of the various parts of the device, the operation thereof will be readily understood. The unthreshed grain is fed into the machine in the customary manner. After the grain has gone through the thresher, the chaff is eX- pelled through the straw chute. The threshed grain and the unthreshed heads of grain drop onto the screen 4 from the chalfer The threshed grain drops through the sieve 4 to the screen 28 where itis delivered to the grain auger 29. The grain auger is shown diagrammatically in Fig. 1, of the drawing, since it is a part of the ordinary thresher. The unthreshed heads of grain, however, are prevented from passing through the screen 4 and are moved towards the roller 13' by means of the draft from the grain cleaning fan 30, and by' the suction from the stacker fan (not shown). The direction of the draft from the fan 30 is indicated by the arrows in F 1. The

roller 13 conveys the unthreshed grain to the thrashing cylinder 2, where it is threshed and carried back to the sieve 4. This operation is repeated until all of the unthreshed grain is threshed. The chafl from the grain which is threshed by the cylinder 2 is carried to the stacker fan by the suction of the fan, and by the draft from the grain clean- The grain feeding fan 30 is a part'of the ordinary thresher and forms no part of my present invention except in so far as it cooperates with the other parts-of the device. It is obvious that the unthreshedheads of grain are tooheavy to be carried upwardly by the draft from the fan 30. The draft from the fan 80. however, carries the der 2 up between the casing 10 and the straw rack 31 Assume that some foreign substance, for

an example, a bolt. has obtained entrance into the machine. It is carried alongwith the grain and finally drops onto the sieve 4. The corrugated roller 13 starts to feed bottom 23 down slightly, thus causing the rod 24 to turn and its end 26 to release an extended arm 29 of the pawl 20. This frees the pawl 20 from contact with the rod 24, and the spring 22 throws the pawl 20 into "engagement with the ratchet wheel 19. The

' ratchet wheel 19,; continually turning with Figure 2) the shaft 14, carries the nawl 20 which is pivoted to the disc 16, thus rotating said'disc in the direction shown by an arrow (see The rotation of the disc 16 causes the screw 16' to be carried with it. As the screw 16 is carried around the 16;"the arm 17, pivoted to the screw 16, drops to the position shown in- Figure- 5, carrying with it the bent portion 26 of the rod 24. This movement turns the rod 24, thus opening the false bottom 23', which is fastened to said rod 24 and drops the bolt onto the ground. The pawl 20 is still held in engagement with the ratchet wheel '19 by the spring 22, thus keeping the disc rotating with the ratchet wheel. The bent portion 26 of the rod 24 is swung back to normal position (see Figure 2) by the arm 17, which is carried by the screw 16 on the rotating disc 16. The bent portion 26 comes into contact with the arm 29 of the pawl 20. This throws the pawl out of engagement with the ratchet wheel 19, and the disc 16 immediately stops rotating, leaving the device in normal position (see Figure'2).

If another foreign substance forces the false bottom slightly open, thus releasing the bent portion 26 of the rod 24 from the arm 29 of the pawl 20, the same operation again takes place.

It is obvious that many modifications and adaptations of the form of the device pictured in the accompanying drawings may be provided without departing from the spirit and scope of my invention.

I claim: 7

1. In a thrashing machine, means for thrashing grain, including a chaffer, a sieve parallel to and spaced from said chaffer, an

auxiliary thrashing means disposed between said chatter and said sieve, said auxiliary thrashing means comprising a thrashing cylinder having a plurality of teeth mounted thereon, a concave having a plurality of teeth disposed between the teeth o-f said thrashing cylinder, whereby grain is drawn through the teeth of Sitld COIlCfiLVG by the teeth of said thrashing cylinder, thus thrashthereon, a concave having a plurality of teeth disposed between the teeth or said thrashing cylinder, whereby grain is drawn through the teeth of said concave by the teeth of said thrashing cylinder, thus-thrashing the grain, and means for returning the grain'threshed by said auxiliary means to said chatter comprising a casing concentric with said drum, sai'd casing terminating just above said chaffer, thus providing a passageway for the threshed grain between said drum and said casing to said chafler.

3. In a thraslnng mach1ne, means for thrashing grain, lIlclli'dlng a cha-fler', a sieve parallel to and spaced from said chaffer, an auxiliary thrashing means disposed between said chaifer and said sieve, and means for feeding grain to said auxiliary thrashing means, said last named means being adapted to automatically eject any foreign substance carried by the grain.

4.1n a thrashing machine, means for thrashing the grain, including a chaffer, a sieve parallel to and spaced from said chafier, a rotatable thrashing cylinder disposed between said chafl er and said sieve, a casing concentric to said cylinder and means for feeding said rotatable thrashing drum, said means being adapted to automatically eject any foreign substance carried by the grain and comprising a false bottom disposed between said casing and said sieve, a rotatable roll positioned directly above said false bottom, whereby said roll draws the grain between it and the false bot-tom, thus feeding grain to said rotatable thrashing cylinder.

5. In a thrashing machine, means for thrashing grain, and means for automatically ejecting any foreign substance carried with the grain, said second named means comprising a rotatable rod, a false bottom fastened to said rod, a rotatable shaft positioned above and parallel to said false bottom and supported by the Walls of said thresher, a corrugated roller made fast to said shaft, a disc loosely mounted on one end of said shaft, a pawl pivotally mounted on said disc having its arm extending beyond the periphery of said disc, a ratchet wheel adjacent to the outside face of said disc and fastened to said shaft, an arm pivotally mounted on said disc at a point diametrically opposite said paWl and spaced from said disc, whereby said ratchet is free to pass between said disc and said arm, said arm having a longitudinally extending slot, a bent end portion of said rotatable rod being slidably mounted in said slot, means for yieldingly holding the bent end portion of said rod in the upper end of said slot, and means for yieldingly retaining said pawl in engagement with said ratchet wheel.

EDD BOE.

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