Patent GB-190302311-A (GB)
Title: Improvements in Knot-tying Implements.
Inventor: COLMAN HOWARD DARLING
Filed: 1903-01-30
Granted: 1903-06-18
Abstract: 2311. Colman, H. D. Feb. 28, A.D. 1902, [date applied for under Patents Act, A.D. 1901]. Tying or knotting.-Relates to an implement for tying knots, and is shown in perspective in Fig. 1. The apparatus is carried by an adjustable support strapped or otherwise secured to the left hand, and is actuated by a fork B<5> which fits over the thumb. The shaft of the fork carries a toothed segment which rotates the knotter shaft C<3> by a pinion, and it also carries a camplate B<3> which moves a lever D<3> for actuating the parts which tighten the knot and draw it off the knotter. The knotter shaft rotates in a fixed barrel C, the inside of which forms a cam-surface for opening and closing one of the jaws C<14>, Fig. 9, the rear end of which is flattened out so as to bear against the inside of the barrel C. This jaw therefore opens and closes as the shaft rotates, and clamps the thread against a beak on the shaft, and also cuts its end off. It is held in place on a pivot by a spring C<7>, which has a point C<8> forming part of the cutting-device. The spring is suitably twisted so as to enable it to perform this double function, and is also provided with a boss C<11> which permits a long pivot pin to be used, and enables the knot to be readily stripped off when tied. The rear end of the spring enters a sleeve C<9> on the knotter shaft, and, when it is required to remove the spring for sharpening the cutting-edges or for renewal, it is only necessary to lift it off its pivot and pull its end out of the sleeve. The barrel C also carries a thread-guiding book C<19>, Fig. 13, fitting on pins C", and having a resilient bent part C<20> which embraces the barrel so as to be readily detachable. The threads to be tied are laid in the hook C<19>, and in a hook on an arm E' so as to engage with the angle of the beak of the knotter. The thumb-fork B<5> is then actuated, and three-quarters of a turn of the knotter shaft makes a bight in the threads, and opens the jaw C<14>. A further quarter turn closes the jaw C<14>, and cuts off the loose end of the threads ; and a further third of a turn draws the knot tight and strips it from the knotter. The final position is shown in Fig. 1. While these operations are in progress, the clamping and tightening mechanism operated by the cam B<3> is also at work. This mechanism consists of an arm E pivoted to a support D and carrying at an angle the extension E<2>, which is hooked, the hook lying between two spring leaves on a bar D<6>. The bar D<6> is pivoted on an arm D<4> connected with the lever D<3>, and is thus moved by the cam B<3>. The arm D' and the bar D<6> are pressed apart by a spring E<3> but can be connected by a spring latch E<5> so as to move together. At the commencement of the tying operations, the hook is protruded beyond the leaves D<7>, and remains so until the knotter has taken up sufficient string to form the knot. The leaves D<7> then close upon the hook, and the arms D<6>, E are then latched together. The cam B<3> then swings the two arms round so as to tighten the knot and strip it from the knotter, after which the latch is automatically released. The latch spring E<8> clips round the end of the arm E, but has no other support.