US1302574A - Threshing-machine cylinder. - Google Patents

Description

A. M. MASON.

THRESHING MACHINE CYLINDER.

APPLICATION FILED APR.8. 191a.

1,302,5MB Patented May 6,1919.

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ALVIN M. MASON, 0F BOZEIVIAN, MONTANA.

THRESHING MACIIINE CYLINDER.

rename.

Application filed April 8,

To all whom it may concern:

Be it known that I, ALVIN M. Mason, a citizen of the United States, residing at Bozeman, in the county of Gallatin and State of Montana, have invented certain new and useful Improvements in Threshing-Machine Cylinders, of which the following is a specification.

The invention relates to improvements in threshing machine cylinders, and more particularly to means for fixedly securing or looking the toothed cylinder bars to the opposite heads of the cylinder to insure against side and rotary movement or other displacement of the bars and to maintain the same in proper rigid relation to the cylinder.

The broad object in view is the provision of improved means of the foregoing character embodying novel features of construction, comprising a minimum of parts with consequent simplicity, possessing the utmost strength and rigidity, and allowing for independent removal and replacement of the cylinder bars with ease and facility.

The invention further resides in the novel construction, arrangement, and combination of parts as will be hereinafter fully pointed out and described in connection with the accompanying drawings, in which Figure 1 is a view in elevation of a fragment of a cross-bar annular cylinder encircling supporting member, the supporting member being shown as provided with a socket in which is mounted or inserted in locked relation a flanged bar-lock member adapted to secure the cross-bar in proper relation to the cylinder, the cross-bar being indicated sectionally.

Fig. 2 is a top plan view of the elements of Fig. 1.

Fig. 3 is a fragmental perspective view of a cross-bar provided with the bar securing device of my invention.

Fig. 4 is a fragmental perspective view of the aforementioned cross-bar supporting member provided with the bar lock receiving socket of the invention.

Referring more specifically to the drawings, the numeral 1 designates an annular cross-bar supporting member which usually embraces the opposite heads of the cylinder of a threshing machine, the same being fixedly secured to said heads. In carrying out my invention I provide said bar supporting member -with the required number of transverse slots such as illustrated.

Specification of Letters Patent.

Patented May 6, 1919.

1918. Serial No. 227,312.

Each slot comprises a circular curved face portion 2 beginning at one edge of the slot and extending to a point where the curved face is interrupted by a flat faced abutment or stop 3 which abutment or stop extends from the opposite edge of the slot to the point where it meets the curved portion 2. The opposite side edges of the curved face portion 2 of the socket are chamfered or beveled ofl as at 4, the bevels extending from the upper face of the supporting member 1 where the scope of thebevels is deepest and gradually merging with the side faces of the supporting member.

The cross-bars of the cylinder which carry the bar teeth 5 are formed with the integral securing members adapted to be fitted tightly in the aforementioned sockets. Each securing member is substantially an enlargement projecting right angularly from the bar and consisting of a circularly curved face 6 extending from one edge of the flat top face of the cross-bar to apoint where the curve meets a flattened ofl face 7 of a cuneate groove 8 extending through the thickness of the cross-bar and oppositely thereof to the curved face 6. A pair of curvilinear flanges 8 are spaced apart by the face 6 and project outwardly, said flanges diverging from one another and gradually curvin to merge with the face 6. Then the 100 -member is fitted into the slot by a rotary movement the flanges will engage in wedge fashion with the tapered beveled oif portions 4, rotary movement being limitedand the locking member confined in the slot by engagement of the stop 3 with the flat face 7 of the slot. In accomplishing the removal and replacement of the bars the outstanding bar teeth 5 may be utilized as a leverage means.

Having described my invention, I claim l. A device of the character described consisting of a supporting member pro vided with a transverse slot or recess, said slot or recess being formed with a circularly curved face extending from one upper edge of the slot'and terminating at a point where the same meets the flat face of an abutment or stop, the latter extending inwardly from the remaining upper edge of the slot, beveled off portions at opposite sides of said curved face said portions ex tending from the upper face of the supporting member and gradually tapering to merge with the side faces of the supporting member; and a bar locking member formed and proportioned to fit said slot and engage said beveled off portions, said member having a circularly curved face adaptedto engage the curved face of'the slot, a cuneate groove having a fiat face adapted to engage the stop of the slot, and a pair of curvilinear flanges spaced apart by the curved face of the locking member, said flanges diverging from one another and gradually curving to merge with the latter curved face and being adapted to engage the beveled off portions of the supporting member.

2. A tooth bar having a rounded face and spaced locking flanges forming friction members and said rounded face terminating in a flat abutment face opposite the friction members.

In testimony whereof I afiiX my signature.

ALVIN M. MASON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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