US1424933A - Cylinder for thrashing machines - Google Patents

Description

R. H. OWEN.

CYLINDER FOR THRASHING MACHINES.

APPLICATION FILED NOV. 2, 1921.

1241,@33 Patented Aug. 8, 1922.

2 SHEETSSHEET I.

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A TTORIVEYS R. H. OWEN.

CYLINDER FOR THRASHING MACHINES.

APPLICATION FILED NOV- 2. 1921.

1 42%,933, Patented; Aug. 8, 1922.

2 SHEETS- SHEET 2.

[IV l/EN TOR ATTORNEYS rasrara ROBERT H, OWEN, OF BUTTE, MONTANA, ASSIGNOR 0F, ONEs'lH-IRD T0 EDWARD F. MAGINN AND'ONE-SIXTH TO M. H. GL-EASON, BOTH 0F BUTTE, MONTANA.

CYLINDER roa rHRAsHrive MACHINES.

Application liled November thrashing machines and more particularly to j the cylinders thereof, my object'being the promotion of a cylinder of a simple eco-' nornical structure in which provision is made for the ready renewal of brokenor otherwise unserviceable teeth and a further obj ectis to enable .the teeth to be replaced easily and "quickly without the necessity of longcon plicated wrenches, as well as an arrangement in which the teeth will be rigidly held in their connected position against shifting movement or displacement.

In the accompanying drawings which. illustrate my present invention and form a part of this specification,

Figure 1- is a top plan view of a cylinder for thrashing machines constructed in accordance with my invention,

Figure 2 is an end view thereof,

Figure 3 is a face view, looking from the inside, of one of the end plates,

Figure 4 is a top plan view thereof,

Figure 5 is a partial transverse section taken adjacent to the central partition or supporting plate,

Figure 6 is across section through one of the tooth bars adjacent to one of the tooth seats thereof,

Figure 7 is a side view of the parts shown in Figure 6, j

Figure 8 is a detail perspective view of a portion of one of the end plates looking from the inside thereof,

Figure 9 is a detail section taken on line 9-9 of Figure 7, and

Figure 10 is a partial longitudinal section taken on line l.010 of Figure 1.

Referring now to these figures and particularly to Figure 1 I have shown a shaft at 10 on which the cylinder proposed by my invention is secured, the opposing end plates 11 of the cylinder having central hubs 12 provided with key slots 1.3 adjacent to their shaft receiving bores for the above purpose.

In addition to the two end plates 11 the cylinder includes a central or partition plate 14 which, like the end plates 11, have periph Specification of Letters Patent.-

2, 1921. Serial 1105512352.

ratemeaau a, 1922.

eral slots, the-side walls 15 of which slots are provided with'inner obliquely undercut sections 16 conformable to the shape of the tooth bars 17 whose end portions extend into the peripheral slots or, grooves of the end: plates 11 and whosecentral portion extends through the conformably shaped peripheral slots or grooves of the partition'plate 14.- It will be noted from Figures 2, 5, 6 and 7 that the tooth bars 17 have the outer portionsof their side walls parallel and have their inner portions flared so that they thus slidably interfit the openings peripherally of the end plates 11 and partition plate 14:, each of the bars 17 having secured to its inner face anchor plates 18, the connection at which is effected by machine screws 19 threaded into" the bars and whose positioning inendwise abuttingrelation against the inner surfaces of the end plates 11 thus holds'the bars against lengthwise displacement under normal circumstances. Upon removal of one of the anchor plates the tooth bars may be shifted in the direction of their length out of the cylinder.

Each tooth bar 17 is also provided in its length with transversely disposed and tapering recesses 20 into which, the inner reduced portions 21 of the transversely tapering teeth 2-2 are adapted to interfit, each tooth having a transverse opening adjacent to its inner end to aline with an opening 28 transversely of the tooth bar in communication with its recess 20, for the reception of a connecting bolt 2 1. By reducing the inner end of each tooth 22, the latter is left with an inwardly facing shoulder 25 as clearly shown in Figure .6 abutting the outer face of the tooth bar which, in conjunction with. the taper of the tooth in both lengthwise and transverse directions and similar tapers of the walls of the tooth bar slots or recesses. obviously forms a strong supporting connection for the tooth by virtue of which breakage is to a great extent avoided.

Should a tooth break it is quite obvious that it is simply necessary to remove the In their arrangement around the cylinder it willxbenoted'thatitheateeth 22 "are in staggered relation? as clearly seenin Fig ure 1 and it is to be observed that upon certain of the bars 1t'1s necessary tofiX'the-outeror end teeth in'the plane of the end plates 11. For

this purpose certain' of the peripheral slots- 15 have their side wallscutfaway to form pockets 27 by means of'which the bolts and nuts can be 'reached and Withdrawn in the replacement of these particular teeth.

o it is quite obvious from. the foregoing thatthe means shovvn'and: described are Well adapted to the carrying out of the objects firstabove mentioned and that the cylinder v as proposed 'byrny invention Willbe strong and durable, is capable of ready repair Without requiring particular skill: for this purpose, and provides for easy interchange of the parts thereofi .lclaimz 1 1.- A thrashing cylinder having circular end plates and an intermediate circular supportor partition, said partition and' said end plates having longitudinally alinedperipheral grooves provided Witlrunder out side Walls, tooth bars having flaring inner POT-j tions and slidable in the direction ofthei'r -lengths vinto and out of the said grooves,

means detachably associated with the tooth bars and engaging the end' plates"=to nor? 'mally.hold the tooth'wbarsxagainst sliding tapering longitudinally and transversely to interfit the recesses and having shouldered portions to seat against the outer faces ofthe bars.v I a 3. A tooth bar for thrashing cylinders having a series of recesses in 'its length, each recess tapering vertically and transversely ofthe bar, lengthwise and transi'rersely'tapering teeth interfitting the said rece'ss'e s at I one'end, and a connecti-ngbolt through-each tooth and the adjacentportion 'of'thfe bar forsecuring the-teeth in place, the saidre-f oess entering end or each tootl1 ;being ire,-

duced in one direction to form a shoulder-on the tooth abutting" the outer 'l'a'ceo fthe bar for the purpose described O ER J

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