Patent GB-190308758-A (GB)
Title: Improvements in Knotters for Grain Binders.
Inventor: NEWMAN WILLIAM
Filed: 1903-04-17
Granted: 1903-07-02
Abstract: 8758. Newman, W. April 17. Sheafing or binding apparatus.-Relates to the knotting-mechanism of grain-binding harvesting- machines, and affects principally the knotter-bill and the cord clamp. In Fig. 1, A represents the needle shaft, B the binder table, and C the breast plate, which is formed with upstanding flanges c on the upper side instead of the usual strengthening-ribs on the underside, to enable the knotter to be placed nearer to the sheaf and thus tie the knot more tightly. The knotter frame G is provided with an additional leg or support G' secured to the breast plate on the opposite side of the needle slot. A circular recess or race-way for the point of the knotter-bill is formed in the lower part of the leg G', and forms a guard to prevent the cord from slipping off the knotter-bill. The fixed jaw J of the knotter-bill is secured to a hollow shaft S having at its upper end a mutilated pinion s with specially-shaped delay shoe adapted to be operated by the teeth u and cam surface on the periphery of the knotter-driving wheel W. A recess is made in the jaw J near the point of the pivoted jaw J' to give room for the doubling of the cord in the tying of the knot and to facilitate the stripping of the knot from the knotting-bill. The movable jaw J<1> is pivoted at b and is provided with a pivoted extension b' carrying a friction roller adapted to engage the fixed cam K to operate the jaw J<1>, as required. A spring S<2> is mounted within the hollow shaft S and acts through a sliding stem S' upon the pivoted jaw J<1>. The spring is adjusted by means of a screwed plug S<3> in the upper end of the shaft S. The plug S<3>, when adjusted, is secured by a set-screw s<1>, which also secures the pinion s on the shaft. The knotting-bill is operated by the driving-wheel W in such a way that it stands at right-angles to the needle slot when the cord is laid across it, it then moves through a complete revolution to tie the knot, and, after the cord has been cut, falls back again into a more convenient position for the stripping of the knot, owing to the shape of the cams K, W. The cord clamp and cutters are shown in section in Fig. 4. The shaft T is driven by a pinion t gearing with teeth t' on the wheel W. The cord cutters H<1>, H<2> are made longer than usual to cut off a longer end of cord, which will be held more securely by the cord clamp. The lengthening of the cord cutters is rendered possible by the method of actuating the knotter-bill described above. The cord clamp consists of the usual notched ring H driven by the shaft T and a stationary shoe I pivoted at I<3> to the frame. A clamping-finger I', to engage the inner surface of the ring H, is also pivoted at I<3>, and is connected to the shoe I by the arm i<1> and spring i<4>, arranged as shown, so as to regulate the pressure both of the shoe I and finger I<1>. The shoe I is provided with a lateral arm, which bears against the ring H to ensure the proper balancing of the spring action on the clamp. The cord is held between the ring H and the shoe I and between the ring H and the finger I', with the object of preventing the cord from slipping, and thus avoiding the "missing" of the sheaves.