Patent GB-190325838-A (GB)
Title: Improvements in Looms for Weaving Wire Cloth.
Inventor: LINDSAY HAMILTON
Filed: 1903-11-26
Granted: 1904-04-14
Abstract: 25,838. Lindsay, H. Nov. 26, A.D. 1902, [date applied for under Patents Act, A.D. 1901]. Looms for weaving wire cloth. Beat-up motions.-The lay is actuated through links and arms from a shaft which is rocked by a lever and cam. Lays; shuttle-races.-The lay has a recess, in which is a bottom plate d<7>, mounted on pins d<10>, passing through the lay bottom and normally pulled down by coiled springs. When the lay is drawn back, the plate d<7> is raised to form a continuous shuttle-race by arms d<18>, fixed to a rockshaft d<13> carried by the lay, acting on the pins d<10>. The shaft d<13> is rocked by a roller on an attached arm d<14> coming against a stop. Picking-motions.-The picking-sticks d<2>, d<3> are forced inwards by leaf-springs acting on their cranked upper ends. To each cranked arm is attached a cord e<10> connected to a reciprocating bar sliding in guides and connected by a cord to a pivoted lever acted upon by a cam on the cam shaft. When this lever is depressed, the reciprocating bar is pulled down until it is held by a gravity catch, so that the corresponding picking- stick is set in an operative position. As the lay moves back, it acts on the gravity catch and releases the reciprocating bar, thus allowing the leaf-spring to operate the picking-stick. Weft tension, regulating apart from shuttles.- Hooks c<17>, carried by arms c<14> on a rock-shaft c<13>, lie alternately under the path of the shuttle in grooves in the plate d<7>, catch the weft wire, pull a sufficient length from the bobbin for the next shoot, and tighten the weft last laid. The shaft c<13> is rocked by linkwork actuated by a cam on the cam shaft, so that the hooks are raised and lowered. Prongs F, mounted on rock-shafts f<1>, are normally held outwards by coiled springs f<3>, but when the lay moves back, trip-pawls d<0> upon it act upon lugs f<5> on the shafts f<1>, so that the prongs F swing inwards and knock the weft wire off the hooks c<17>. Shedding-motions.-The heald frames H, H<1> have fixed to their top and bottom shafts tongues h which slide between friction rollers mounted on frames h<2>. The healds are actuated through suitable mechanism by cams on the cam shaft. Take-up motions.-The cloth beam is rotated through spur gearing from a ratchet-wheel actuated by a pawl on a pivoted lever, which is vibrated by a cam or by a handle. If too much cloth is being taken up, a leaf-spring projecting from an arm fixed to the lay bottom passes beyond the upper end of a pivoted trip when the lay beats up, and forces the trip back when the lay returns, so that its lower end acts through a pivoted lever to disengage the pawl from the take-up ratchet-wheel. The pawl is held inoperative until its lever has been vibrated, by means of a latch which engages a pin on the trip, until released by the leaf-spring as the lay moves back. Let-off motions.-The shaft of the warp beam A' is mounted in slidable bearings, and is provided with a worm-wheel engaging a worm on a vertical shaft, which slides in brackets and is supported by an arm of a weighted lever. As the woven cloth is taken up the warp beam rotates, and the vertical shaft is forced downwards by the worm-wheel acting on the worm, thus raising the weighted lever. One arm of a pivoted double lever is forced by a spring against a pin on the weighted lever, and rises with it, so that other arm of the double lever is lowered into the path of a friction roller on the pawl-carrying lever of the take-up motion. The double lever is thereby vibrated, and a pawl upon it actuates a ratchet-wheel and rotates the vertical shaft and worm in the direction to allow the shaft to rise again.