US324290A - Harvester-reel - Google Patents

Description

INV ENTOR [Zimm- R Bahew.

Patented Aug. 11, 1885.

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' UNITED STATES 1 PATENT OEETQE.

WILLIAM R. BAKER, OF CHICAGO, ILLINOIS.

HARVESTER-REEL.

SPECIFICATION forming part; of Letters Patent No. 324,290, dated August 11:, 1885.

Application filed August 7, 1884. (N model.)

Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Harvester-Reels, of which the following is a specification.

In modern harvesters the reel is generally mounted upon a jointed supporting -franie, and driven by means of a chain-belt. thrown over a sprocket-wheel on the wooden reel- This sprocket-wheel is driven tight upon the shaft and bolted in place, the operation requiring some time and care. The con- 'nection is at first firm and secure, but under the necessarily harsh treatment of themachine in the field is apt to become loose and ramshackley, and then is not readily tightened a ain.

The object of my present invention is to provide means whereby the sprocketwheel may be easily, quickly, and economically secured to the reel-shaft, so as to make a safe and steady connection therewith, and whereby also it may at any time be readily tightened as to such connection; and it consists in applying circumferentially about the shaft a series of wedge-shaped wear-plates and combining therewith a sprocket-wheel having corresponding wedge-shaped recesses in the central bore of its hub, so that when it has been slipped into position over these plates, and is driven in its normal direction, it shall clutch and clamp the shaft; in combining with the sprocketwheel and wedged wear-plates encircling the reel shaft a clamping-belt passing through a circumferential slot in the wheelhub and into the shaft, and having its head resting upon'a wedge-seat orincline on the periphery of said hub, opposed in action to the clutching connection between the hub and wear-plates, so that by tightening the bolt the wheel will be rigidly held to theshaft; and in the various other combinations and details of construction hereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of a harvestenreel and so much of its supporting and driving mechanism as is necessary to the present description. Fig. 2 is a side elevation of a driving sprocket-wheel secured upon the reel-shaft according to my invention, with said shaft and the wheel-hub in section to more clearly indicate the arrangement of parts; Fig. 3, a vertical section transversely through the wheel and longitudinally of a portion of the reel-shaft, and Fig. 4 a de-- tail of one of the curved wedge-plates to be secured to the shaft.

A is a wooden reel-shaft, with the usual.

beaters, a, and supported upon the jointed frame E, of any suitable form. At the inner f 5.

the recesses or inclines in the hub. Thes e wear-pl ates are secured to the shaft with screws-- g or other fastenings, applied near the thickest edges, the opposite edges being left free in order that under pressure they may bind firmly upon the shaft and tend constantly to take up all wear beneath them.

As thus described, it is evident that if the sprocket-wheel is slipped into place upon the wear-plates and held from lateral movement by any suitable device, it will clutch or bind 1 upon said plates when driven in its normal direction, and that any wear or abrasion of the wooden shaft will be compensated for by T a further and further binding upon these plates. For the purpose of securing the wheel from lateral movement, as just intimated,- its hub is slotted circumferenti-ally, as at is, and

abolt. K, passed through this slot into the shaft beneath. To receive this bolt the shaft has previously been bored and one of the wearthe hub will permit sufficientperipheral movement over the shaft to cause the teeth of the hub to bind upon the wear-plates. The bolt has a distinct, and in a sense independent, agency in prevcntinglateral movement of the sprocket-wheel. alone; but I propose also to give it a second agency as a means for clamping the wheel when it has become firmly engaged with the shaft, and to prevent reverse motion or loosening or, disengagement of the cl etching-grip between the two. To this end the sides of the slot in the wheel-hub rise or areinclined to form a seat for the head of the bolt, and this incline is opposed in action to the elutelrengagement between the hub and wearplates-that is to say, when the hub is firmly clutched upon the wear-plates and the bolt clamped down upon its own inclined seat, the two actions will be opposite to each other, the bolt and incline preventing reverse motionof the sprocket-wheel upon the shaft, while the hub and wear plates prevent motion independently of the shaft.

\Vhile I have described my improvement as attached or employed in connection with a sprocket-wheel, it is evident that it can be equally as well applied to a gear-wheel, and hereinafter where I employ the term wheel in the claims, I intend that a gear-wheel shall be understood as an equivalent of a sprocketwheel; nor do I intend to limit myself to the application of this fastening arrangement upon a reel-shaft alone, as there are many other situations in which it can be employed with advantage.

I claim as my invention- 1. The combination, substantially as hereinbefore set forth, of the wooden shaft, the

wedged wear-plates secured circnmferentiall y thereon, the wheel having internal teeth in its hub to match with said wear-plates,and the bolt passing through aslot in the hub and into the shaft to prevent lateral movement of the wheel.

2. The combination, substantially as hereinbcfore set forth, of the wooden shaft, the wedged wear-plates independently secured about its periphery, the wheel having inclines or teeth in the bore of its hub to match said wear-plates, the bolt passing through a circumferential slot in the hub, and the inclined seat for the head of said bolt.

3. The combination, substantially as hereinbcfore set forth, of the wooden shaft, the wedged wear-p1ates independently secured about its periphery, the nut confined in aseat in said shaft by one of the wearplates, the wheel having internal teeth or inclines in its hub to match and engage with the wean-plates, and the bolt passing through the shaft to engage with the nut in said shaft.

4. The wedged wearplate, formed to embrace a portion of the periphery of the shaft,

and having a central perforation for the passage of the clamping-bolt.

5. The driving sprocket or gear wheel formed,substantially as hereinbefore set forth, with internal friction teeth or inclines in the bore of its hub, a circumferential slot through said hub, and an inclined seat alongthelength of said slot opposed in its action to the action of the internal friction-teeth.

WILLIAM R. BAKER. Witnesses:

J OI-IN V. A. HASBROOK, PAUL ARNOLD.

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