US312790A - John f - Google Patents

Description

(No Model.)

J.P. APPLEBY.

KNOTTING MECHANISM FOR GRAIN BINDERS.

N0. 312,790. Patented Feb. 24, 1885.

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JOHN F. APPLEBY, OF MINNEAPOLIS,

MINNESOTA, ASSIGNOR TO THE MIN- NEAPOLIS HARVESTER VVOR-KS, OF SAME PLACE.

KNOTTING MECHANISM FOR GRAIN-BINDERS.

..;PECII-"ICATION forming part of Letters Patent No. 312,790, dated February Z, 1885.

(No model.)

To all whom it may concern:

Be it known that 1, JOHN F. APPLEBY, of Minneapolis, Minnesota, haveinvented an Improvement in Knotting Mechanism for Grain- Binder of which the following is aspecification.

It is the object of my invention to simplify the knot-tying mechanism employed in grainbinders, first, by so organizing the parts that a single cam serves to actuate the mechanism for gripping the binding-cord, and also the mechanism for cutting the cord and disengaging'it from the knotter after the knot is formed; secondly, by dispensing with the movable cutters 1 and knot-strippers heretofore used. I accomplish the latter object by'giving to the knotter shaft, in addition to its usual capacity of rotation upon its longitudinal axis, a to-andfro lateral motion. By this motion, after the knot is 29 formed, the knotter first draws the cord across a stationary knife, by whichthe cord is cut, and then disengages itself from the knot which has been formed and returns to its normal position. My knotter is thus a self-stripper.

The drawings, which represent knot-tying apparatus embodying my improvements, together with some of the adjacent partsof a grain-binder to which the knot-tying apparatus is applied, are as follows:

30 Figure 1 is a top view. Fig. 2 is an elevation, partly in vertical section, through the line 00 won Fig. 1. Fig. 3 is a vertical section through the line .2 2 on Fig. 2. Fig. 4 is a horizontal section through the line y 3/ on Fig. 2.

Fig. 5 is a vertical section of the binder'table immediately beneath the k notting mechanism, showing the cord-needle and its path of motion relatively to the parts shown in Fig. 3.

The knot-tying mechanism represented in 0 the drawings is composed of the usual knotter, A, which consists of the vertical shaft A, having a bevel-pinion, A, affixed to its upper end, and having at the bottom the usual laterally-projecting hook, a, to which is pivoted 5 the ordinary spring-jaw,B. The arm b, projecting backward and upward from the hub of the jaw B, is provided with an anti-friction roller, b, which by the action of the jaw-spring b is held up against the cam B, formed upon the lower end of the tube 0, in which the knot- 5c tor-shaft A is inserted and has its bearings. As 7 the knotter-shaft turns in its bearings within the tube 0, the jaw B is opened or closed accordingly as the roller 1) bears upon the projecting or recessed parts of the cam B. The rotation of the knotter upon its vertical axis is effected by means of the segmental rack D, formed upon the periphery of the canrwheel E, which rack at the proper time engages the pinion D, affixed to the horizontal shaft d, 63 carrying the bevel-wheel D which meshes into the bevel-pinion A and by such engagement turns the knotter once around upon its vertical or longitudinal axis. Prior to such engagement, the endpf the cord being held 65 in the gripper, and the cord passing thence over the hook B and around the gavel to the needle, the cord arm or needle F has completed its upward swing, carrying the new end of the cord across the top of the knotter- 'jaw B, and a vibrating claw, Gr, operated by a sector-plate, G, having an arm, 9, engaging a cam-groove, 9, formed upon the outer face of the cam-Wheel E, has caught the cord farther back and has carried it under the k notter-hook alongside the old end of the cord, thus forminga bight in which the hook and jaw lie,

so that when the knotter rotates the doubled cord is wound once around it. In making the turn the jaw B is raised by the bearing of the roller 1) upon the projecting part of the cam 13, and the doubled cord is caught between the hook a and the jaw B. At the conclusion of the revolution of the knotter the roller 1) rides into the recessed partof the cam B, and the jaw B is thus permitted to spring down and grip the doubled cord upon the top of the hook a.

The mechanism thus far described, both in itself and in its mode of operation, is very 0 similar to the knotting mechanism heretofore employed in grain-binders, and it is in the mechanism for the performance of the coneluding steps of the knotting operation that the novelty and usefulness'of my invention 5 are chiefly manifested. These steps are, first, the cutting of the double cord a short distance from the part which is held by the knotter,

and next the stripping off of the loop which I pawl Kis pivoted to one arm of the bell-crank has been wound around the knotter, while the cut ends of the cord are gripped between the jaw B and the hook a, whereby the cut ends are made to pass through the loop, and the knot is thus formed. By my invention these two steps are accomplished by anovel combination of devices for imparting to the knottershaft at the conclusion of its revolution upon its longitudinal axis a laterally-outward motion in the vertical plane of its said axis, as the first result of which the doubled cord is cut between the knotter and the gripping disk H by being drawn across the edge of the stationary knife I, aflixed to the standard J. As the second result the k notter draws itself out of the loop, and in so doing draws the cut ends'of the doubled cord through the loop, thus completing the knot.

The drawings illustrate the method of giving the required lateral motion to the knotter.

The tube or bearing G is provided near the top upon opposite sides with the horizontally-projecting trunnions C and C". which have their bearings, respectively, in the standard J and the elbow j, projecting horizontally from the standard J. Au arm, 0, extending from the upper part of the tube or bearing 0 toward the cam-wheel E, is provided with an anti-friction roller, C, which is engaged by the cam-groove 6, formed in the inner face of the canrwheel B. So long as the roller 0 is engaged by the con centric part of the canrgroove e the k nottershai't remains vertical; but when the rotation of the cam E has so far progressed that the rack D has performed its function of rotating the knotter the inwardly-curved part c of the cam-groove e engages the roller G and rocks the arm 0 downward upon the horizontal axis afforded by the trunnions O and Ci thus rocking the lower end of the tube 0 outward, and thereby giving to the knotter the lateral motion which has been described. The range of this motion is suiiicient to effect the disengagement of the knotter from the knot, after which the knotter is swung back to its normal position as the roller 6 rides outwardly to the concentric part of the cam-groove c. It will be seen that the angle'of the bevel of the pinion A is substantially perpendicular to a radial line extending from the horizontal axis aiforded by the trunnions G and C to the middle of the bevel, and it follows that the swinging of the tube 0 does not fully withdraw the teeth of the pinion A from engagementwith the teeth of the bevel-wheel D", and causes no rotation of the pinion.

It is a feature of the organization shown that the same cam which actuates the cutting and knot-stripping mechanism is also employed to reciprocate the pawl K, which impels the ratchet-wheel h of the gripping-disk'H. The

lever K, the other arm of which carries the anti-frietion-roller K which by engagement with the cam-groove 6 causes the bell-crank lever to be rocked back and forth once during each revolution of the cam-wheel E, andthereby at the proper time turns the gripping disk H, as usual, one step in order to present a new notch for the reception of the cord next brought forward by the cord-needle. The cord is clamped against the disk H by the usual clamping-plate, H, which is pivoted to the side ofthe standard J. I adjust the clamping force of this plate by means of the adjustable expanding spiral spring H surrounding the bolt H, the head of which bears against the clampingplate, while its shank is loosely inserted in the tubular screw-bolt H inserted in a hole tapped through the flange J of the standard J. By screwing in the bolt H the spiral spring H which bears against the inner end of the bolt H and the head of bolt H, is additionally compressed, and, by screwing out the bolt H the tension of the spring H is correspondingly diminished.

I claim as my invention-- l. The combination, substantially as before set forth, of the knotter-shaft, the pivoted bearing therefor constructed with a projecting arm, and the canrwheel provided with a eam-groove which engages the arm of the said pivoted bearing.

2. The combination, substantially as before set forth, of the cam-wheel provided with a cam-groove, the k notter-shaft and its pivoted bearing constructed with a projecting arm which is engaged by the said cam-groove, the

cord-holder, and mechanism, substantially such as described, actuated by the same camgroove for independently operating the cord holder.

3. The combination, substantially as before set forth, of the intermittingly-rotating bevelwheel D the knotter-shalt provided with the bevel-pinion A", the knotter-shaft bearing pivoted to theknotter-fraine on an axis transverse to the axis of the bevel-wheel D, and a cam for swinging said pivoted bearing, whereby the swinging of the knotter effects practically no disengagement and no rotation of the said bevel-gearing.

4. In a grain-binder, the combination,with the knotter and the cutter, of mechanism for disengaging the k hotter from the loop and severing the binding-cord, the gripping-disk H, the impelling-pawl K, and a single cam for actuating both said pawl and said disengaging and cord severing mechanism, as described.

JOHN F. APPLEBY.

itnesses:

E. B. GUMPERT, O. M. CASTLE.

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