Patent GB-104036-A (GB)
Title: Improvements in Warp Thread and like Selecting and Separating Mechanism.
Inventor: DOBSON WILLIAM
IPC: D03J1/14
Filed: 1916-02-26
Abstract: 104,036. Dobson, W. Feb. 26, 1916. Healds and reeds, threading.-Apparatus for selecting and separating warp threads &c. for drawing-in and other purposes, of the kind described in Specification 29477/13, is operated by a continuously-running prime-mover through a mechanical make-and-break appliance, and a sensitive feeler lever acted upon by the separated threads acts on the make-and-break appliance to stop and re-start the selector mechanism as required. As shown, a carrier bar a, Fig. 3, is slidably mounted in slots in brackets b, on, say, a drawing-in frame c, and is held in position by screws b' and hinged lugs. A rail d on the bar a is engaged by three wheels on a carriage plate f, Fig. 2, the single wheel at one side of the plate being mounted on a lever g acted upon by a spring h to cause the wheels to grip the rail. A slide i is mounted on the plate f, and on it are pivotally supported the separator comb j, the selector needle k, and a driving-pawl l, which co-operates with a ratchet-wheel m secured to one of the plate wheels. A pivoted feeler lever n controls the action of the pawl l as described in the abovementioned Specification. A further slide o is suitably mounted on the plate f, and one end is forked to engage a vibrator bar q, while the other end has an horizontal fork o<3>, in which a trip lever r is pivoted in an inclined manner so as to tend to move towards the slide i and engage a shoulder s<1> in a metal strip s secured thereto. A lug o<1> on the slide o normally engages a shoulder i<1> on the slide i, which is therefore normally moved positively in both directions when the slide o is reciprocated by the bar q. A feeler lever t is pivoted to the plate f, and its free end extends across the desired tooth of the separator, so that, when the desired number of threads have been separated, the foremost of these threads moves the lever t, which in turn acts on a projection r<1> on the lever r and frees this lever from the shoulder s<1> to break the driving connexion between the slides o, i. The connexion is automatically restored when the separated threads have been drawn in. The bar q is mounted on arms q<2> on a shaft u, to which is secured a suitably-shaped lever v having a roller v<2> at its lower end held by gravity and spring action against an eccentric or cam-disk x on a shaft w, which is driven by a pulley x<1> and belt x<2> from an over. head shaft or a motor. A disk x<2>, Fig. 6, with studs x<3> may be used to actuate the lever v, which is preferably shaped as shown, to ensure proper timing of the operative parts. Alternatively, an eccentric z', Fig. 8, may work in a slot in the slide o and be slidably mounted on a square shaft z to move across the frame with the carriage plate. The bar a may be freed and drawn back when a new warp is to be introduced into the frame. The warp threads are held by upper and lower pairs of clamping-bars, one bar of the lower pair being mounted to slide horizontally, and they are deflected by a presser-bar a<2>.. A single bar a<2>, Fig. 9, may serve both as the presser-bar and as the guide-bar for the wheels of the carriage plate, and for this purpose is made wider than the bar d and is arranged at an angle, with its front edge, which deflects the warps, lying as near as possible to the plate f. The front wheel e<3> is held yieldingly against the edge of the bar a<2> by a short lever z<5> and a spring z<6>. For the same purpose, the bar a<2> may be stepped or simply made wider than the bar d.