Patent GB-225980-A (GB)
Title: Improvements in apparatus for the manufacture of brushes
IPC: A46D3/04
Filed: 1923-10-13
Abstract: 225,980. Neuhafer &. Levi, Ltd., M., (Marogg, R). Oct. 13, 1923. Brush-making machines of the type employing a needle for securing the tufts in the stock by continuous wiring. The needle is formed with barbs, and is adapted to be pushed through each of the tapering holes in the stock from the side where the holes are wider, the needle being moved forward until it engages a wire-catcher into which a wire-drawing lever, coacting with a wire-bending lever, has previously clamped a wire loop. As shown in Fig. 1, the brush stock 106 is held between jaws 1 of a member secured to a frame 108 which is slidably mounted on a guide 109 pivotally mounted on a vertical pin 110. A hook 7 is provided on one of the jaws 1, to which hook the free end of the wire a from the bobbin 96 is fastened when the machine is being started. The bobbin 96 is fixed on a pivotally-mounted wire-drawing lever 15, Fig. 2, carrying an eye 116 for guiding the wire, rollers 97, 98 and a brake pulley 92 with an adjustable brake band 93. The lever 15 is adapted to be moved towards or away from the brush stock by means comprising a rod 16, a lever 13, a spring 14 and a. roller 79 engaging a cam 12 on a driving shaft 115. The wire-bending lever comprising two arms 17, 119 is pivoted at 118 and the lower arm 119 is connected by a spring 18 to a fixed bar 37. On the movement of the lever 15 towards the brush stock 106 the lever 17 is moved by the spring 18 in the same direction, and the wire a is bent downwards into a loop by means of a cranked lever 20 and a spring 21 and pressed between two spring members forming a wirecatcher 22, Figs. 2 and 5. The needle 38, Figs. 1 and 7, subsequently enters the wire-catcher and draws the wire therefrom through the brush stock to form a loop on the opposite side of the stock. The needle is mounted in a lever 42 on a shaft 41 supported by a slide 10 which is adapted to be reciprocated by a connecting-rod 11 and a crank 9 from the driving shaft 115. A stop member 40 is provided on the shaft 41 to coact with an inclined guiding stirrup 39, whereby the needle, when it has passed through a hole in the brush stock, is given a lateral movement which is communicated to the stock and corresponds to the distance between two adjacent holes. On the shaft 41 of the needle lever is loosely mounted a handle 82 connected bv a spring 83 to a pin 81 fixed on the shaft 41. The handle is locked in one of three positions by means of a rotatably-mounted quadrant 84 spring-pressed towards the handle and provided with three notches 85, 86, 87. When the handle is on either of the outer positions the needle lever 41 is moved into a corresponding position by the spring 83 whereby the stop member 40 is positioned to coact with one or other. of the guiding stirrup 39. The bristles are held in a magazine from which the tufts are picked by a bundle-feeder 62, Fig. 1. The feeder is secured to a lever 59 loosely mounted on a vertical shaft 56 and intermittently coupled to a lever 55 fixed on the shaft 56. Means are provided for disconnecting the lever 59 from the lever 55, whereby the feeder, under the action of a spring 75, moves through the wire loop formed by the needle, bringing with it as far as half-way a tuft of bristles. The slide 10 with the reedle then moves forward whereby the wire loop is disengaged and falls with the tuft on a support 78. The wire-drawing lever 15 is at the same time being gradually moved away from the brush stock and the tuft of bristles is thereby drawn into the stock.