US923221A - Fastening for threshing-machine teeth. - Google Patents

Description

0,, WALLS GHLAEGER. I FASTENING FOR THRESHING' MAOHINB TEETH.

. APPLIOATION FILED JULY 6, 1 908.

- 2- 1 1 Patented June l, 1-909.

j, jnnrrnn STATES PATENT ci i ron OTTO WALLSCHLAEUER, 01* MILWAUKEE, WISCONSINQ FASTENING FOR THRESHING-MACHINE TEETH.

nttees ei.

To all whom rt may concern;

Be it known that I, ()T'ro vYALLsonLAn of fastening the inscrtiblc toot GER, of Milwaukee, \llisconsin, have invented a Fastening for 'llhreslringdxlachinc Teeth, of whichthc following is a specification.

My invention relates to an. inmrovedinmle tor the cylinders and concaves of threshing-nlachincs.

. Up to the present time grout dilliculty has been experienced in finding n inc-tins for his toning thresher-teoth in position so securely as toprevent them from working loose during operation and yet of such character that they may be easily removed and rcphtced. The general .iuenns in use has been screws or sdrew-threedcd devices. These are open to serious objections that they ire piently work loose even when furnished with lock'nuts, elastic washers and the'like,

.and that in the case of the cylinder-being:

; on the inner faces of the cylinder bars, they are dilllcult to get at with a wrench and to screw up tight in place; and this especially true when the teeth, are set close together.

' In my invention I aim to provide/.8- fastening device whichshall entirely dispense with the use of screws and screw threads and which moreover shall have the characteristic.

that any loosencss or wnbbling 01' the'teeth shall have the ellect'of drawing them tighter I in place rather than allowing their! to becoine looser. And l-furthcr his: to provide a lustening with the additional vchm-actcl-istic that it can he set up and the teeth secured or removed n a. few moments and without the use of a wrench, tool, or special dii'liculty of any kind.

vhined with a, spring acting to press or pull the'wedge up into place. In combination with these features, Where an open notch is used, I also use a special form of washer adapted to hold the wedge in place.

My invention consists further in the special constructions and combinations which will be herein-after described and particularly set forth inmy claims. I

In the accompanying drawings I have Specification of Letters Patent. Application filed July 6, 1908. Serial No. 442,025.

which engages a wedge It.

Patented June 1, i909.

shown the most improved form. of my invention in'conncction with portions of a cylinder and concave of a tlmeshing-machine, and herein' liigurc 1 represents in tranverse section a part of a cylinder and concave, the teeth of which are provided with my improved liastoning; Fig: 2 is a longitudinal section through one of the bars carrying the teeth, showing the tooth. and wedge in elevation: his. 3 is a. perspective of the washer, and Fig. lis a perspective of the wedge.

In these drnwin every reference letter rel'ers alive ys to the some part.

Fig. lshows a common form of thresh'ercylinder 1: carrying bars 1) in which are set rows of teeth c, and a portion of a concave (1 having bars c also carrying rows of teeth 0. These elements may be of any pattern, style and shape, the latter forming no part of my invention. v

The shanks of the teeth 0 are provided with tapered shoulders 9, said shanks fitting in sockets h in the bars I) and c which are preferztbly flared at the ends as at i, to fit the shoulders g. The ends of the shonksfprojec-t beyond the back side of the'bnrs Z) and c, and each. shank is provided with at recess j in The recess j may consistently with any invention be in the form of oslot anywhere in the bar, but 1 prefor to make it iii-the form of an open-sided notch. in one sidcthereof, as such 21, notch can be forged directly in the tooth instead of being cut out specially. In the case of such an open-sided notch or slot, I use a. washer ,m

hnving a central aperture it formed by turn- I mg up the metal to form a tongue or abutment 0 thereof at right angles to the plan of the washer, said abutment lying against the openfnce of? the notch or slot 7' and holding the wedge 73 against lateral displacement.

The wedge is is held in place by means of-e spring 2) which is connected with the-small end of the wedge by a hole g therein, or a hook 1" as shown. in the case of the lower teeth, Fig. 1; said spring p being connected to the wedges of two adjacent teeth which are turned in opposite directions as shown, so thatthe effect of the spring is to draw the two Wedges together, and to draw each wedge more tightly into lace. Ordinarily the rows of teeth in the cylinder and concave are even in number, so that there will be a whole'nmnber of pairs of teeth-t0 be united by the springs 31; but. in caseof anvuneven number of'rows, I may fasten the springs p of the odd teeth to a fixedbaror like object 8. 4

While l prefer to use the spring 19 as shown 5 to connectgthe two wedges it is not necessary thatthisform of spring or any form of s ring he usi asa simple' wire or any form 0 connection holding the two wedges together would serve the purpose consistently with invention, though less perfectly.

' ing; in combination with a tooth having a recess in'the shank thereof, a Wedge'fittmgin said recess and holding the tooth against 7 e. I' have 'hereinabove shown the most. improved form of my invention, I wish itunderstoodi'that not all of the features are esas; ;i'a'l thereto or necessarily madein the exact form shown, but. various changes and modifications in'the constructions as herein isen eofmy claims. r

371.11g h rdfi libed my invention, what "claim as new and desire to secure by Letters Patent is: v I r I I A fastening for thresher-teeth comprispulling out, and resilient means for pressing said wedge more firmly into place. e I .2. Afastening for thresher-teeth comprising, in combination with a tooth having a re-' 'cess in the'shank thereof, a wedge fitting in said recess and holding the teeth against pulling out, and a spring acting to draw said wedge more firmly into lace.

3.- In a threshing-mac line, a fastening for the teeth thereof comprising, in combination With two adjacent teeth each having a trans .Vers'e recess in the shank thereof, two trans-- verse wedges fitting in the respective recesses, and a spring connecting the two wedges. I

4. In a threshing-machine, a fastening for the teeth thereof comprising, in combination with two adjacent teeth each having a transverse recess in the shank thereof, two transverse wedges fitting in the respective recesses and having their small ends toward each other, and a connection between small ends of the two wedges tending to draw them together in a direction lying across said recesses.

5. In athreshmg-m'achme, a fastening for shown may be made without de arting from 'he spirit of my invention, and -wish it 1111s ue st'ood therefore that. the latter is not otherwise limited than by the reasonable the teeth thereof comrisin in combination with two adjacent tee l1 eac having a transverse 'recessin the shank thereof, two trans -verse wedges fitting in the respective, re-

cesses, and a tension-spring connecting the small ends .of the two wedges.

i 6. In a threshing-machine, means forfastening the teeth thereof comprising, in combination witha tooth having an o en-sided recess in one side of the shank t ereof a transverse-wedge set in said recess and shd able parallel, tothe face of said recess to draw 'up the tooth, means for preventing-saidm wedge fromretracting', and an abutment facing theiopen side of said recess and holding said wedge agag'j st'lateral' displacement.

7. In a-thres ing ma'chine, means for fastening the teeth thereof comprising, incombination with a'to'othjh'aving an o en-sided recess in one .sideof'thefsh'ank t ereoffa' transverse wedge setin said recess, means for preventing said wedge from retractin'g, .and a washer having an aperture" through 1. which said shank passes andfanu'pright tongue at-v one side .of-said aperture forminganabut1' ment lying against the open; face of saidire cess.. i

8. Inga threshing-machine, means for fastening the teeththereof comprising, in combination with-a tooth having an o ten-sided recessin one side ofithe shankv t ereof, a

washer through which said shank passes pro- .vided with an upright tongue subte'ndin'gthe open side'of said recess a transverse wedge f-fitting in said recess, and a spring acting on said wedge to press it m ore ti tly into place.

combination, a pair of adjacent teeth. each having an open-sidedrecess in one side of the reshing mac ine,- fasteningmeans for the teeth thereof comprising, in

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