USRE1963E - Improvement in raking attachments to harvesters - Google Patents

Description

Y www R. D. BROWN.

Raking Attachment to Harvesters.

Reissued May 23, 1865.

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UNITED STATES PATENT "()Frici-z..

ROBERT D. BROWN, OF COVINGTON, INDIANA.

IMPROVEMENT IN RAKING ATTACHMENTS TO HARVESTERS.

Specilication formingpart of Letters Patent No. 38,094, dated April 7, 1863; Reissue No. 1,876, dated February 2l, 1865; Reissue No. 1,963, dated May Q3, 1865.

To all whom 'it may concern.-

Be it known that I, ROBERT D. BRoWN, of Covington, in the county of Fountain and State vof Indiana, have invented a new and Improved Automatic Rake for Harvesting-Machines; and I do hereby declare the following to be a full, clear, and exact description ot' the same, relerence being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a plan of the apparatus. Fig. 2 is a vertical section at a' w. Fig. 3 isa vertical section at y y. Fig. 4 is a vertical section at z z.

Similar letters of reference indicate corresponding parts in the several views.

The prominent feature of novelty in my said invention consists in a rake carried over and beneath the platform by endless chains or beltsl revolving in vertical planes, the said rake being journaled in its carrying-belts and guided by a slot in the frame, as will be hereinafter explained.

The invention further consistsin the use, in combination with the aforesaid rake, of an intermittent device, hereinafter described, deposi ting the gavels com pactly upon the ground.

In order to enable those skilled in the art to which my invention appertains to fully understand and use the same, I will proceed to describe its construction and operation.

A represents the platform on which the grain falls as it is cut. The said platform is provided with a series of grooved ribs, a a, the purpose of which will be presently understood.

B represents arake pivoted to endless chains or belts C O, which are carried over and beneath the platform A by means of pulleys P P. The head of the said rake is by preference, but not necessarily, formed with a series of curves to t the ribs a a, as represented in red lines iu Fig. 4, in the summit of which curves its teeth b b are fixed. The teeth project to a sufficient height above the head to catch and convey all the grain upon the platform and project downward into the groove, as shown.

D is a crank-arm projecting rigidly from the rake-head at right angles, or nearly so, with the teeth b, and traversing an eccentric groove, d, in the main frame, which groove is so formed as to turn the rake alternately to its working and its retracted position, as will be hereinafter explained.` This groove may be of any -motion to deposit the grain in compact gavels upon the ground by means of the following mechanism:

G G are bevelpinions, each provided with one, two, three, or more cogs, g g, occupying a suitable portion of its periphery.

H is a driving-shaft, carrying two bevel- Wheels, I I, each provided with a limited num-4 ber of cogs t t', and with a cam-surface, i', formed of an elongation of the last cog of the series.

J J are spiral springs employed to restore the cradle Fj'to its normal position when released by the cams t', as hereinafter explain ed.l

Motioumay be transmitted from the drivingsh aft H to the propelling-pulleys P of the rake through the medium of the gearing K L M, or in any other suitable way. The shalt ot' the' pulleysPQby which therake-belts arestretched, runs in adjustable boxes N N, which may be moved in orout by set-screws O Oto regulate the tension of the belts as required.

Operation: The parts beingset in motion in the directions indicated by the arrows, the rake, passing under and between the stationary teeth E,is drawn over the platform, sweeping off all the grain which has accumulated thereon since its last stroke and depositing it in the cradle Ff, and'is then by the continuous mo-` tion ofthe belts O carried beneath the platform. The upper part of the eccentric groove d, being nearly ona level with the upper part of the belts C, elevates the teeth of the rake to a vertical position as they pass over the pulleysl P', and so retains them while-traversing the upper side ofthe platform; but as therake passes beneath the platform the groove, being here higher than the chain, retracts the teeth to aphorizontal position, so that theymay occupy lthe smallest possible space in their return motion.

By a suitable arrangement on the end ofthe rake-head of the' crank-arm or its equivalent adapted to catch Within the groove the required motion of the rake-headmay be attained-that is to say, the necessary Vibration may be eifected-which will lay the teeth in f a position to pass unobstructed or lie in the vof modification to suit thedevice which is made to traverse in it, which is such as will give the required vibration to the rake-head to change the position of the teeth relatively to the belt, by which the rake-head is carried and operated;

At the instant that the cradle Ffis supplied with grain the cogs t' on the wheels I engage with the cogs g ou the piuions G and impart a simultaneous rotation to the shafts F F, which turns the cradle to the position in the red lines in Fig. 3, so as to irst compress the grain and then deposit it in a compact gavel upon the ground. The cams i i', bearing against the last teeth of the pinions G, hold the shafts stationary for a sufficient period to permit the grain to fall and the machine to advance entirely clear ofthe gavel, and the pinions being then released by the continued motion of the Wheels I, the springs J J restore the cradle Ff toits former position, and the work proceeds as before.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. The continuouslyrevolvng rake B, carried forward over the platform and back beneath the same by means of driving chains, belts, or their equivalents, and elevated to its Working position during its forward motion Vand'retracted in passing beneath the platform by means of a crank-arm, D, or its equivalent working in a slot, for the purposes specied.

2. Governing the position of the rake-teeth by the partial rotation ofthe rake-head, which travels parallel with the cutter-bar, by means of an endless belt or chain W-hen the said rotation is effected by the traversing of a wrist attached to the rake-head in a slot of the required configuration.

l3. The intermittent cradle F f, operated as described, in combination with the continuously-revolving rake B, for the purposes set forth.

ROBERT D. BRO WN.

Witnesses v DAVID RAWLEs, 1. HISTINE.

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