US373055A - Self raking attachment for harvesters - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

M. DEW; SELF BAKING ATTACHMENT FOR. HARYESTERS. r I No. 373,055. Patented Nov. 15; 1887.

N. PETERS, Pholvkilhngrapher, Wnhmgton. D. c.

(No Model.) 2 Sheets-Sheet 2.

M. DEW.

SELF BAKING ATTAGHMENTFOR HARVEQTERS. vN0. 373,055.

Patented Nov. 15, 188'].

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UNITED STATES ATENT rricn.

MARTIN DEW, OF CASS CITY, MICHIGAN.

SELF-RAKING ATTACHMENT FOR HARVESTERS.

SPECIFICATION forming part of Letters Patent No. 373,055, dated November 15, 1887.

Application filed August .10, 1886. Serial No. 211,422. (No inodel.)

To all whom it may concern:

Be it known that I, MARTIN DEW, of Cass O1ty, 1n, the county of Tuscola and State of Michigan, have invented new and useful Improvements. in Self-Raking Attachments for Harvesters; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to new and useful improvements in self'raking attachments for reapers and harvesters, by means of which the cut grain is conveyed from the platform to a receptacle where it is to be bound.

The object of my invention is to so gather the grain from the platform and deliver it into a receptacle at the inner end of the platform as to make a complete separation of the cut straw from that falling on the platform.

My invention consists in the novel construction, arrangement, and combination of differout parts of my self-raking device, all as hereinafter described, and specifically set forth in the claims.

In the drawings which accompany this specification, Figure 1 is a plan view of my improved self-raking device as attached to the platform of a harvester. Fig. 2 is a crosssection thereof on line x as. Fig. 3 is a longi. tudinal vertical section. Fig. 4 is an elevation of the guide-rail of the rake-heads. Fig. 5 is a perspective view of the inner end of the harvester-platform and its attachments. Fig. 6 is a detached elevation of the rake-head. Figs. 7, 8, and 9 are elevations of detached parts, indicated by their letters of reference, and also specifically referred to hereinafter.

' A is the platform of a harvester, supportedon a suitable frame in any suitable manner,

. and provided with the usual cutting apparatus. (Not shown in the drawings.) 7

At each end of the platform is located a shaft, B, and on these shafts are secured suitable sprocket-wheels, around which are stretched the endless chains 0 O, as in the usual construction of chain-carriers.

Two rakes, D, are used, of the kind shown in Fig. 6. These are secured to the chains 0, at equal distances apart, by means of links E, of which'Fig. 9-is a side elevation. These links are provided with journal-bearings a, in which the rake-heads are journalcd by means of cylindrical bearings 1), formed thereon. The bearings b are provided with cam-grooves 0, into which a pin, (1, secured in the respective journal-bearings, engages.

Each rake-head is provided with a crank, c,

observed thattheguide-railF runsparallel with the direction of the chains, except neartheinner and outer ends of the platform, where it diverges therefrom, and the guide-rail G runs parallel to that portion of the guide-rail F to which it corresponds. By this arrangement a certain lateral movement is imparted to the rake-head near the inner and outer ends of the platform while it travels around the sprocketwheels, all in the manner and for the purpose hereinafter described.

The inner end of the platform connects with the binding-table, which is provided witha suitablebinding apparatus, which is not shown, as it does not form a necessary part of the present'invention. The apparatus for reeling the grain onto the platform isalso omitted, as I intend to use any-of the ordinary constructions-snch as the common reel or a reel-rake, preferably the latter, in which case four beaterarms with teeth carried by the wheel f would be arranged to operate in the usual manner.

. The openings 9 at the outer and inner ends of the platform; through which the rakes pass up and down, are protected by suitable guards to prevent the straw from falling through, the opening at the outer ends being protected by guards h of any suitable constructionin the present instance shown as spring-metal fingers rigidly secured to the divider-boardand at the inner end by guards i, which are secured to a rock-shaft,j, to which is secured the rockarm K. The free end of this rockarm is'suitably bent to pass through a slot in the guide-rail F and project into the path of the rakes, all so arranged that in the movement of said rakes the cranks at the ends thereof will strike against the free end of the rock-arm and lift it up, so as to raise the guards t sufficiently high above the platform to permit the rake-heads passing underneath.

Above the inner end of the platform are secured a number of springs, I, arranged so that the cut straw in passing underneath said springs is compressed until it has passed beyond, when the springs will be released from their compression and drop to their former position. Each of these springs I is preferably of the shape shown in Figs. 3 and 5, with one end fixedly secured to the cross-bar I and its other or vertical portion working loosely through holes in the bracket 1 secured to said bar.

I preferably keep the chains entirely concealed below the platform, and provide the latter with suitable slots, 1, through which the links E project to carry the rakes over the top of the platform.

One or more of the raketeeth have a rear extension, 7r, said extension being designed to come in contact at a certain point of the operation of the rake with a stationary stop or stops, m, below the platform,near the inner end thereof.

The parts being arranged and constructed as shown and described,their operation is as follows: Vhile the rake passes over the surface of the platform its teeth are held vertically up, owing to the engagement of the crank at the rear end of the rake-head into asuitable groove in the guide'rail F. In this position of the rake the pin (Z on the journal-bearing of the rake engages into an offset in the cam-groove c of the rake-bearing, as shown in Fig. 7, thereby holding the parts firmly locked together. The semicircular portion of the guiderail F is also suitably grooved to guide the rear end of the rake-head, and as' the latter arrives at the inner end of the platform it also comes in contact with the guide-rail G, and as the rake passes down between these two guiderails it is laterally displaced toward the rear, owing to the angularity of the guide-rails with the chains. This lateral displacement of the rake-headis equal to the lateral length of the cam-groove c in the bcarin g b, and it causes the pin (1 to traverse said cam-groove c after releasing it from its engagements in the offset therein. The teeth .of the rake are thus held in a perpendicular position until the rake has reached the lowest point-that is, having passed around the outer half of the sprocketwheels. Here the pin d will be at the point in the cam-groove shown in Fig. 8, having traversedone-half of the cam-groove; and now, in the further travel of the rake, the projections k on the rake-teeth (there being preferably two or more teeth with such projections) strike the stops at and thereby impart to the rake-head one-quarter of a revolution, the raketeeth thereby assuming a horizontal position, which they will maintain until they arrive near the outer end of the platform. In raising upward at this end of the platform, the rear end of the rake-head is again engaged in a groove in the guide rail F and pushed laterally forward by a suitable forwardinclination of the guide-rail to cause the pin (1 to traverse the remaining onequarter of the cam-groove, so that by the time the rake reaches the top of the platform the pin d will be in its starting position. Fig. 4 shows in dotted lines the differentpositions of the rake'teeth. It will be seen that the rakes are thus made operative the whole length of the platform, and as they draw below the platform at the inner end they keep the bundle still compressed; and if the beater or reelarms are timed with the rakes to throw their complement of grain on the platform when one of the rakes rises to the surface and at the proper intervals of time to permit each rake to sweep the platform the whole width before any more grain is thrown on the platform, a complete separation of the cut straw. is obtained and the bundles are ready to be tied.

It will be further observed that as the raketeeth are turned horizontally below the platform the latter can be reduced in height.

I preferably provide the platform with a slight upward incline at the inner end,for the purpose of withdrawing the rake-teeth more gradually and also to get enough room for the operation of the binding mechanism, which, in connection with the parts herein shown and described, constitutes what is commonly termed a low-down binder.

\Vhat I claim as my invention is 1. The combination, with the rake-heads and the chains, of a link provided with journal-bearings a, a pin, (1, in saidjournal-bearings, and cylindrical bearing b, formed on said rake-head and provided with cam-grooves c, engaging said pin, substantially as and for the purposes specified.

2. In a self-raking device for reapers and harvesters, the combination, with endless carrier chains, of a rake-head rotatablyjournaled in bearings secured to the carrier-chains and having rigid raketeeth, a pin on the bearing and cam-groove in the journal of said rake-head, and a cam, G, fixed on the frame at its inner end, for effecting the lateral movement of the rake-head by direct action thereon required to rotate the rake-head by reason of said pin and cam-groove engagement at certain parts of its travel, all substantially as described.

3. In a self-raking device for reapers and harvesters, the combination, with the rake D, having the crank 0 formed at its rear end, of the carrier-chains G, the links E, having journal-bearings a, the bearing b on the rake head, having cam-groove c, the pin d, engaging into said cam-groove, the guide-rails F, and cam G, fixed on the frame at its inner end, all arranged and operating substantially as described.

4. In a self-raking device for reapcrs and harvesters, in combination with the endless chain'carrier and means for imparting motion thereto,arake rotatably secured to said chaincarrier, the link E, provided with journalbearings, a pin in said bearings, a camgroove in the rake-head engaging said pin, and the cam G, whereby the rake-head is actuated independently of the carrier-chains to hold the teeth in a vertical position while passing over the platform and around the inner end thereof, substantially as described.

5. In a self-raking device for reapers and harvesters, in combination with endless chaincarrier and means forimparting motion thereto, a rake provided with cylindrical bearings rotatably secured to said chain-carrier, the link E, provided with journal-bearings, a pin in said bearings, a camgroove in the rakehead engaging said pin, and cam-guides for the ends of the rake for actuating the rakehead independently of the carrier-chains, to hold the teeth of the rake in a vertical position while passing around the inner and outer end of the platform and over the top of the same and in horizontal position while passing below the same, substantially as described. 6. The combination, with the rake and guide-rails, of the rock-shaft j, guards i thereon, and the rock-arm K on said rockshaft and projecting in the path of said rake, substantially as and for the purpose specified. 7. The combination, with the platform, of the rake, rear extension, 70, on the teeth of said rake, and stops m below the p1atf0rrn,near the inner end thereof, substantially as shown and described, and for the purpose specified.

MARTIN DEW.

' Witnesses:

L. A. DE WITT, S. O. ARMSTRONG.

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