Patent GB-190817521-A (GB)
Title: Machine for Leasing Warps.
Inventor: HILLER GUSTAV
Filed: 1908-08-20
Granted: 1909-08-19
Abstract: 17,521. Hiller, G. Aug. 20. Yarns, leasing.-The lease is formed by two loops of thread 33, 34, Fig. 9, drawn from a stationary bobbin and guided through eyelets in slides 39, 40, the ends of the threads being secured to a clasp. The foremost unleased warp thread is separated from the other warp threads and passed between the slides, the guides for which are interrupted to allow for the passage. The slide that is above the plane of the warp threads is then moved downwards below this plane, and the slide that is below is moved above this plane, whereupon another warp thread is separated and passed between the slides, and so on. The slides are moved up or down to the warp plane by pushing- rods 44, 45, 46, &c., Fig. 3, driven by lever mechanism from a crank-disk on a shaft 71, which is actuated from a ratchet-wheel 76 loose on a shaft 75. The motion of the slide is completed beyond the warp plane by oscillating driving-hooks 84, 85, 86, 87, which have wedge-shaped parts to engage the eyelets on the slides. The hooks are driven by lever mechanism from an eccentric on the shaft 75, which is driven by a gear 82 feathered on a shaft 12. The warp threads to be leased pass from a warp beam 5, Fig. 1, fixed in its bearings by a screw 9, over a breast beam or roller 7, and between the clutch-jaws of a clamp 8, which is closed by a rack-and-pinion device. The leasing-device A is traversed across the machine by a driving-chain passing round a wheel 23 on a shaft 21, which is driven by worm-wheel mechanism 20, 18, a ratchetwheel 19, a disengageable driving-pawl 16, and adjustable crank-mechanism 29, 26, 28. The foremost unleased warp thread, which comes into contact with an abutment 153, Figs. 3 and 10, on an arm 154 on an oscillating shaft 155, is separated from the remainder by an oscillating knife or sickle 156 on an arm 157 secured to a spur-wheel 158, which is rocked by a toothed segment 160 on an oscillating lever 140. This knife passes down the opposite side of the foremost warp. The abutment 153 is then removed, and, as the arm 156 continues its movement, the separated warp thread is fed forwards by means of a wedge 172 secured to the knife. A fork-shaped member 176 on an arm 177 then engages the warp thread, the arm 177 being rocked in a direction opposite to that shown by the arrow, Fig. 10, by lever mechanism and an eccentric on the shaft 75 ; the member 176 is at the same time gradually raised by a guide-pin 188, which is carried by the framework of the device A and fits through a slot 187 in the arm 177. The separated warp thread is then fed forwards over wings or ribs 173, 174 and between the slides 39, 40. A fork is arranged above the warp thread to prevent it from being accidentally jerked upwards. The separated warp thread is brought behind hook - shaped notches 189 on the ribs 173, 174. The relative position of the slides is then changed so as to form the lease. The distance apart of the abutment 153 and knife 156 is regulated by adjusting the abutment, by means of a micrometer screw, so as to suit threads of different thicknesses. The threads immediately in front of the knife 156 are smoothed and tensioned by means of a curved receiving-surface 129, Figs. 3, 9, and 10, on the framework of the leasing-device, the warps gradually rising up this surface. The warp threads are also acted upon by smoothing-members 131. on a rotating carrier 132, driven by spur gearing 134, 135, and pawl-and-ratchet mechanism 139, 136, the pawl being carried by the lever 140, which is oscillated hy lever mechanism and an eccentric on the shaft 75. The smoothing-members may be yieldingly mounted ; or there may be under them a yielding bearing surface or plate 151 for the warp threads, this plate being connected by a flat spring with the framework of the leasing-device. A pressure plate 130 carried by a lever 148 oscillated by cams or pegs 150 on the carrier 132 is moved intermittently against the receiving-plate 129 so as to tension the warps. The plates 129, 130 are provided with notches for the separating-knife to enter. The osrillation shaft 155 is driven by a toothed segment 162, which has an arm provided with a pin engaging a curved slot in a plate 166 connected to the oscillating lever 140. The warp thread, which is separated by the knife 156, while being transported by the member 176 engages a feeler 119 of a bell-crank 120 mounted on a lever 117, so that the hooked part 120 of the bell-crank is rocked upwards out of the path of an oscillating lever 127 driven by lever mechanism from a eccentric on the shaft 75. The rocking movement upwards of the bell-crank is limited by a pin 122 on the lever 117. If no thread is separated by the knife 156, the feeler is not actuated, and the hooked part 120 of the bellcrank is engaged by the lever 127. The lever 117 is thereby rocked upwards and an abutment 108 is moved by lever mechanism against spring action iuto position to engage an arm 80 and throw out of action a spring pawl 78, which normally drives the ratchet-wheel 76 and is carried by an arm 79 oscillated by an eccentric on the shaft 75. The ratchetwheel 76 and the pushing-rods are therefore not actuated, and the position of the slides is not changed until a thread has been engaged by the separating- knife. The worm-wheel 20, Fig. 1, is loosely mounted on the shaft 21, but a coupling-disk on the shaft 21 is provided with holes for a spring-controlled engaging pin on the worm-wheel, whereby the shaft 21 and worm-wheel may be coupled together. This pin may be provided with means for retaining it in its disengaged position. When commencing the leasing operation, the driving-pawl 16 is disengaged from its wheel by a lever 30, the worm-wheel 20 is uncoupled, and the shaft 21 is rotated by the crank 22 so as to move the leasing-device to its starting position. The warp is then smoothed and tensioned by a brush roller 192, and is afterwards secured to the clamp 8, Fig. 3. The lease threads are threaded through the eyelets of the slides 39, 40, and the machine is started by engaging the driving-pawl 16, Fig. 1, and coupling the wormwheel to its shaft. The clasp may be secured to the lower parts of the driving-chain. Loom warp threads, uniting.-It is stated that the means used for separating the warp threads may be applied to warp-uniting machines.