US732355A - Breastplate stripping device for grain-binders. - Google Patents

Description

v PATENTED JUNE 30, 1903. E. A-. JOHNSTON. v BREASTPLATE STRIPPING DEVICE FOR GRAIN BINDERS.

APPLICATION FILED SEPT. 26, 1902. no'uonnL.

2 SHEETS-SHEET 1.

MTEEEEE I PATBNTED JUNE 30, 1903.

' E. A. JOHNSTON; BREASTPLATE STRIPPING DEVICE FOR GRAIN BINDERS.

' APPLICATION FILED SEPT. 25, 19.02.

2 SHEETS-SHEET 2.

H0 MODEL.

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- knotter-jaws.

U ITED STATES Patented June 30, 1903.

PATENT OFFICE.

EDWARD A. JOHNSTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNA- TIONAL HARVESTER COMPANY, OF CHICAGO, ILLINOIS, A CORPORA- TION- OF NEW JERSEY.

BREASTPLATE STRIPPING DEVICE FOR GRAIN-BINDERS.

;;PECIFICATION forming part of Letters Patent No. 7 32,355, dated June 30, 1903.

Application filed September 25, 1902. Serial No. 124,828. (No model.)

To all whom it may concern:

Be it known that I, EDWARD A. JOHNSTON,

a citizen of the United States, residing at Chi-j vices for Grain-Binders and I do hereby de-,

clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to the knotting mechanisms of self-binding harvesters, and has for its object to provide a device that will facilitate stripping the loop from the jaws of the knotter when the knot has been completed.

As herein illustrated, the invention is employed in connection with that class of knotters which make but a single revolution to complete the knot and come to rest with their jaws pointing outward in the general direction of the discharge of the bundle and which have the outer portion of the breastplateslot deflected from the plane in which the cord was laid into the general direction of the In this type of knotters a finger projects across the breastplate-slot just inside the knotter and supports the cords un til the knotter in the early stage of the formation of the loop sweeps them over and around the end of the finger into the deflected portion of the slot in the breast-plate, and when the loop is stripped from the knotter-jaws the cords drag against the edge of the slot and being under considerable tension the friction against the breastplate interferes with the easy stripping of the loop.

The present invention contemplates the provision of a moving surface, against which the cords rest while the knot is being stripped, thereby obviating the frictional resistance to the stripping operation above referred to, and, as herein illustrated, this surface is composed of a scalloped disk, which is seated in a depression in the upper surface of the breastplat-e just under the knotter and outside of the cord-supporting finger and which is freely pivoted orjournaled with one edge overhanging the breastplate-slot, so that the slot.

cords contact with the periphery of the disk instead of with the edge of the slot, and the disk being free to turn the outward passage of the cords is greatly facilitated and the stripping of the knot made more easy and certain. The disk also serves to hold the two strands of the band which extend between the knotter and the bundle and prevent the holder-strand from stretching so far outward away from the needle-strand as to endanger its being seized and broken by the knotter. It sometimes happens that this holder-strand slips downinto thelower portion of the breastplate-slot before the completion of the knot, and in this position it is liable to be seized and broken by the knotter. It is therefore desirable to keep the two strands together until the completion of the knot, and this result is effectually secured by the notches of the disk catching the strands and compelling both to move together.

' The invention is illustrated in the accompanying drawings, Wherein Figure 1 shows a fragment of the breastplate of a binder and illustrates in plan the disk and cord-supporting finger and their relation to each other and to the breastplate- Fig. 2 is a sectional elevation on line 2 2 of Fig. 1. Fig. 3 is a plan view similar to Fig. 1, illustrating the function of the disk in holding the holder-strand'of the band from prematurely slipping down into the slot; and Fig. 4 is a view similar to Fig. 2,showing the same action of the disk.

Referring to the views, a, denotes the knotter-frame; b, the breastplate; c, the needleslot, and d the cord-supporting finger. All these parts are constructed, positioned, and related in a manner which is now well understood in the art and need no further description. 1

The knotter-e is of the type heretofore described-namely, having but a single revolution to complete the knot and standing when at rest with its jaws pointing diagonally downward and outward. It is positioned in the usual manner with respect to the cord-supporting finger and the breast.- plate-slot, which latter has its outer portion 0 deflected from the line of the main portion into the general direction of the knotter-jaws when at rest.

The stripper, as herein illustrated, consists of a disk f, having a scalloped, notched, or serrated periphery and seated in a circular depression h in the upper surface of the breastplate at one side of the slot and just outside of the cord-supporting finger.

The diskfis loosely journaled on a pin or stud g, secured to the breast-plate centrally of the depression h, so that the edge of the disk will overhang the breast-plate slot and come just in rear of the outer edge of the cord-supporting finger.

The construction being as just described, when the revolution of the knotter sweeps the cords over and around the end of the finger d they contact with the periphery of the diskf, and this disk being freely rotatable the further rotation of the knotter and the stripping of theloop from its jaws cause the disk to turn with the cords instead of sweeping them along the slot in contact with the edge of the breastplate. The frictional resistance of the breastplate-slot is therefore eliminated, and as the disk is free to turn on its axis and rotates easily the stripping of the knot from the'jaws of the knotter is greatly facilitated.

As will be understood from Figs. 3 and 4c, the two strands of the band which extend from the knotter through the breastplate-slot around the bundle will lie in the notches of the disk, the two strands lying in different notches, as indicated in Fig. 4, or in the same notch. This compels both strands to move together in their further travel through the slot of the breastplate and prevents the holder-strand from beingstretched outwardly away from the strand that goes around the top of the bundle, which premature outward movement, as heretofore explained, endangers the safety of the cord by rendering it liable to be seized by the knotter-jaws, so that the band will be broken in an attempt to strip the knot from the knotter when the bundle is discharged.

Although I have herein illustrated this stripper as composed of a scalloped disk, I do not desire to be limited to such particular construction, as any sort of a freely-rotatable device that will present a moving surface for the supportof the cords during the stripping operation instead of allowing them to scrape along the edge of the breastplateslot would be within the spirit and scope of the invention so far as its function as a stripper is concerned. In so far as to its action in holding the holder-strand up in the slot until the knot is completed, however, it is of course necessary that the edge of the disk be formed with some equivalent of the scallops, so as to take hold of the two strands and hold them together.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is

1. In a knotter mechanism for self-binders, the combination with a-slotted breastplate, and a knotter, of a freely-rotating disk journaled on the breastplate under the knotter with one edge overhanging the slot, whereby the cord will engage the disk instead of the edge of the slot and the stripping of the knot be facilitated.

2. In a knotter mechanism for self-binders, the combination with a breastplate having a deflected slot, and a knotter which stops with the jaws trending outward, of a freely-rotating disk journaled on the breastplate under the knotter ,with one edge overhanging the slot, whereby the rotation of the disk facilitates the stripping of the knot from the jaws.

3. In a knotter mechanism for self-binders, the combination with a breastplate having a cord-supporting finger and a deflected slot, of a knotter which stops with its jaws trending outward, and a freely-rotating scalloped disk journaled on the breastplate under the knotter with its edge in proximity to the outer edge of the finger and overhanging the deflected portion of the slot, so that after the cord has been carried around the finger by the knotter, the rotation of the disk facilitates the passage of the cords outwardly along the slot and the stripping of the knot from the jaws, and the premature outward passage of EDWARD A. JOHNSTON.

Witnesses:

CHAS. N. CHAMBERS, W. M. TWOMBLY.

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