US357140A - William e - Google Patents

Description

(No Model.)

W. R. BAKER.

GRAIN BINDER.

No. 357,140. Patented Feb. 1, 1887.

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WVILLIAM R. BAKER, CHICAGO, ILLINOIS, ASSIGNOR TO THE MCCORMICK HARVESTING MACHINE COMPANY, OF SAME PLACE.

GRAlN-BINDER.

SPECIFICATION forming part of Letters Patent No. 357,140, dated February 1, 1887.

Application filed August 7, 1884. Serial No. 139,895. (No model.) Patented in England July 19, 1884, No. 10,330 in Victoria October 2, 1884, No. 3,854; in New Zealand November 510, 1884, No. 1,800; in South Australia February 2, 1885, No. 531, and

in New South Wales Februury3,1885, No; 1,008.

To all whom it may concern:

Be it known that 1, WILLIAM R. BAKER, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Grain-Binders, of which the following is a specification.

My invention relates to the mechanism by which the end of the binding-cord is grasped and held when delivered by the binding-arm,

and, more particularly, the means for operating the now common rotary-disk holder. This is generally mounted in a swinging frame and so controlled that it is made to yield toward the knotter as slack is demanded inthe tying :5 operation, but is forced away therefrom immediately after theknot is finished. This construction I have chosen as the preferable form for the embodiment of my invention, and to that end have introduced into it certain novel features.

In the class of holders referred to the rotary disk by which the cord is grasped and forced against the clamping-shoe is intermittently impelled at suitable intervals by means of a 2 5 ratchet on said disk and a pawl engaging with said ratchet, which pawlis sometimes mounted on a bell-crank lever and in nearly all modern machines driven by 'means of a cam-track or ledge in or upon the face of a gear and cam wheel mounted on the binder-shaft. Aside from the obj ectionably cumbrous nature of such apparatus and the relatively large amount of friction involved, it has been foundthat the rough usage to which they are subjected 3 5 in practice, the gritty dust from the field, and other causes, result in a rapid wearing away of the cam-track, the ratchet-teeth, the

.pawl, and the joints of the intermediate mechanism, so that after a little while the holder 4o fails to work properly, and the parts have to be replaced, or else an adjustable section has to be introduced into the cam-track at the point where the effective stroke of the pawl is to be given, which may be so adjusted as to carry the point of the latter to the extreme limit of the proper stroke. Such a device, however, imparted to the pawl a longer reciprocation, and as the parts became worn or bent this reciprocation might be carried so far in the reverse stroke as to cause it to pass more than the proper number of ratchet-teeth.

In the present device the point or nose of the pawl itself is made adjustable as to its distance from the immediate actuating mechanism, either by constructing said pawl in sec- 5 tions, one movable longitudinally of the other, or by suitably connecting it with its carrying arm or block, so that while the stroke remains always the same said point may be set nearer to or farther from the'ratchet-tooth with which it is to engage, as demandediby circumstances; and for the purpose of adapting such adjustable pawl to the above-mentioned swinging holder-frame, said-frame is pivoted upon a revolving shaft intermittently turned by a gearsection on a wheel on the binder-shaft and held at rest in the intervals between its movements by a delay-surface on said wheel matching with a shoe upon the pivot-shaft pinion; and upon a wrist-pin from a short crank at the outer end of this shaft is arranged a sleeve having a. lateral arm or log, to which arm the pawl is hinged with its free and properly guided near to the ratchet beneath the holderdisk, whereby the revolution of the wrist-pin as the pivot shaft turns reciprocates the pawl back and forth and brings it into engagement .with the ratchetteeth of the holder-disk, or

causes it to ride over their backs to take a fresh grasp. The cam which controls the times of rise and fall of the holder-frame is also, for convenience and compactness,placed or formed upon the side of the delay-wheel which drives the pinion of the pivot-shaft. Such features,

combinations, and details of construction in the foregoing structure as appertain to my invention will appear from the ensuing description and claims. I e

In the drawings, Figure 1 is a bottom plan view of acord-holder and accessory mechanism 0 embodying my improvements. Fig. 2 is a side elevation thereof with the bracket-support and holder-frame partly in section and the knotter removed to more clearly expose the mechanism; Fig. 3, a like side elevation, with the knotter in position and the holder-frame intact in a differentposition; Fig, 4, a transverse section through the holder-frame and supporting-braclcet on the line indicated in Fig. l by like numerals; Fig. 5, a transverse section through the holder-frame on the correspondingly-numberedline in Fig. 1. Fig. 5 is a similar section on a lower plane, as shown by line 5 in Fig. 1; Fig. 6, a detail of the delay-gearing for imparting motion to the holder-shaft and ultimately to the holder-disk; Fig. 7, a sectional detail of the pawl-pitman employed to move said holder-disk.

A is the binder-shaft which, in the modern McCormick cord-binder, overhangs the grainreceptacle and is driven by a gear and cam wheel at the front thereof. 13 is a portion of thesuppciting-bracket or brack et-casting and rear bearing of this shaft, and C is one of the ejector or discharge fingers commonly mountcd upon and turned by said shaft. These parts will not necessarily differ from those now in use; neither is it essential to my invention that they should identically correspond therewith.

At the rear end of the binder-shaft, inside of the ejector-finger, is a wheel, I), having a peripheral section of gear-teetlnd, and a delaytrack, d, and also upon its face a cam-ledge, d of practically the outline and relative position shown, for the purpose hereinafterstated. Supported in a bearing or hearings in the bracket-casting opposite the lowerinner quadrant of the wheel is a short shaft, E, prbvided with a pinion, c, and a delay-shoe, c, which pinion meshes with and is olsuch size as to be given one revolution by the gearsection, while its delay-shoe looks with the delay-track on said wheel in the intervals between the revolutions and prevents motion. The end of the shaft away from the pinion, and about the center of the holder-frame, is cranked and has a wrist-pin, 0*, whereby motion is to be intermediately communicated to the holder-disk. This short shaft, which I will hereinafter call the holder-shaft, in distinction to the bindershaft, affords one of the journals, f, for the holder-frame f, the other journal, f being located upon the bracket-casting in axial alignment with the axis of the shaft.

A heel projection, f", rises from the holderframe alongside of the wheel on the bindershaft, and a roller, 1", from this projection bears against the above-mentioned cam track or ledge 11 on the face of said wheel, whereby the frame will be pressed down and held down for the proper interval, and then allowed to rise to yield slack in the binding operation, pivoting in this movement upon the axis of the holder-shaft, which can therefore actuate its mechanism irrespective of the displace-- ment.

In the usual position on the holder-frame is journaled the notched holder-disk G, held against retrogression by the click and saddled at one side by the spring-pressed clamping-shoe g,such as has heretofore been known. A ratchet-wheel, g, is secured beneath the holder-disk, as usual, whereby it is to be driven.

Upon the wrist-pin is loosely mounted a block or sleeve, H, having a lateral arm or lug, h, to the end of which the heel of the pawl or dog H is pivoted. A spring, h, is riveted or otherwise secured to the lateral arm or to the sleeve in position to press at its free end against the back of the dog and force it toward the ratchet beneath the holder-disk, and said dog is guided and prevented from circling about the wristpin on one side by means of a smooth or planed way, h upon the framearm, which extends beneath and supports the disk and ratchet, and on the other either by the over-crowning disk or by the click, which is so arranged as to bridge or saddle it. Undue pivotal delay is also guarded against in one direction by the lug h rising from the frame-arm behind the dog, and in the other, of course, by the ratchet. The point of the dog is preferably hooked, so as to catch into and pull upon the ratchet as it is drawn back by the revolution of the wrist-pin; but the ordinary push-dog may be employed, provided it is arranged to act upon thereverse side of the ratchet-disk and a corresponding change of time made in the movement of the crank.

In order to take up or compensate for wear, either the arm to which the dog is pivoted will be made in two sections, one adjustable lengthwise of the other, or else the dog itself will be bimembral and extensible. The latter is hhG'HIOSh convenient resort, and accordingly is chosen for illustration, i being the heelsection, pivoted to the arm, and at its other end ribbed or serrated on one face, and z" the nose-section, correspondingly ribbed or scrrated on the surface intended to come in contact with the roughened end of the heel-section, the connection between the two being made by a slot, 7s, and clamping bolt or screw 7.", the former of which is shown as formed through the heel-section, but may be in either section. This construction is sufficient to permit any reasonable range of adj ustment. Other adjusting devices may be employed; but for the present construction the one described is the simplest and most durable.

For practical use the gear-section and delay-surface on the periphery of the wheel upon the binder-shaft and the cam upon its face will be relatively so arranged and timed with reference to each other, and to the parts which they immediately actuate, that inthe operation of the device the ho1der-disk will move to clamp or grasp the second end of the band, having previously grasped the first before the knotter commences its revolution, and consequently before any slack is demanded and while the holder-frame is stationary; but this clamping of the second end, or, in other words, the stopping of the disk, may not be entirely complete until the knotter has nearly or quite finished its movement. The holderframe, which until the proper'moment is held down by the circular or concentric peripheral reach of the cam acting upon its heel-exten- .HIS

sion, will be released by the attaining of the cut-away portion atthe time the knotter beginsits revolution, and allowed to rise either by the stress of the cord in opposition to its own gravity as slack is required, or else at a rate determined by the outline of the cam at this point; butin the instance shown its gravity alone will, within suitable limits, be opposed to the cord.

I claim as my invention 1. The combination, substantially as hereinbefore' set 'forth, of a swinging holder-frame, a revolving shaft with the axis of which its pivot coincides, apinion and delay-shoe upon said shaft, an arm carried back and forth by a crank on the shaft as it revolves, a holder-disk having ratchet-teeth, a dog pivoted upon the arm and taking into the ratchet to move the disk as the bar reciprocates, a wheel having a gear-section engaging with the pinion on the holder-shaft, and a delay track or surfaeeto engage with its delay-shoe, so proportioned as to give the shaft a single revolution and lock it at rest, and means whereby the holder-frame is controlled in position and permitted to yield toward the knotter as slack is demanded.

2. The combination, substantially as hereinbefore set forth, of the swinging holder-frame, the revolving holder-shaft upon which it is pivoted, a pinion, delay-shoe, and wrist-pin upon said shaft, the binder-shaft'and wheel thereupon having a gear-section to turn the pinion upon the holder-shaft, a delay-track to lock with its delay-shoe, and a cam engaging with a roller upon the rear end of the holderframe to control the movements of the latter toward and from the knotter, the reciprocating arm or pitmanvconnected with the wristpin to be moved by the revolution of theholdershaft, an adjustable dog carried by said arm, guides on the holder-frame whereby said arm and dog are directed, a holder-disk, and a ratchet thereon with which the dog engages.

3. The combination, substantially as hereinbefore set forth, of the holder-frame, the intermittently revolving holder shafthaving crank and wrist-pin, the sleeve and arm borne and actuated by said wrist-pin, the pawl made in two sections, one of which is adjustable lengthwise of the other, the holder-disk and its shoe, and the ratchet attached to said disk.

4. The combination, substantially as hereinbefore set forth, of the holder-frame, the intermittently-revolving holder shaft having crank and wrist-pin, the sleeve and arm borne

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