Patent GB-190314899-A (GB)
Title: Improvements in Looms.
Inventor: BURROWS WILLIAM RUSSELL
Filed: 1903-07-04
Granted: 1903-08-06
Abstract: 14,899. Burrows, W. R. July 4. Looms are controlled electromagnetically by means of an electromagnet which must be energized before the loom can start, the electric circuit, broken by the movement of the healds, being reestablished by the shuttle on its reaching the end of its line of travels, prior to each successive action of the operative parts of the loom. The invention is illustrated as embodied in a loom for weaving wire cloths for paper-making. Driving-mechanism.-Motion is communicated from the normally-loose band wheel 33, Fig. 4, by ordinary clutch mechanism 34 to the power shaft 31, which carries the fast spur-wheels 36, 39 and a clutch wheel 46. When an electromagnet 41 is energized, the longer end of the arm 42 pivoted at 43 is raised and operates an ordinary pin clutch, by which a loose hub on the shaft 31 is connected to and made to rotate with the clutch wheel 46, and a projection on the hub raises the arm 49, which operates a similar pin clutch on the main driving - shaft 35, so that the normally - loose spur - wheel 37 is made fast, and, receiving motion from the wheel 36, drives the shaft 35. On the shaft 35 is an arm 53, which raises the arm 52 and operates another pin clutch, so that the fast bevel-wheel 55 on the shaft 38 is connected to the loose spur-wheel 40 gearing with the wheel 39, and is thereby driven. Beat-up motions.-The crank 59 on the shaft 35 acts through the link 60, Fig 3, on the togglelevers 61, 62 to give a double beat forward to the lay-beam frame 29 and reed 30. Shedding-motions.-The heald frames 27, 28 are connected at top and bottom by bands passing over pulleys, and chains over sprocket-wheels, respectively, and receive motion between the two beats of the reed through a connecting-rod and crank from a rocking shaft, actuated through a depending crankarm by the grooved cam 73, Fig. 4. Take-up motions.-The arm 53 on the shaft 35 acts on a star-wheel, and, through worm and spurwheel gearing, gives an intermittent motion to the cloth beam 25. Picking-motions; shuttles; shuttle carriers.-One revolution of the bevel-wheel 55 on the shaft 38 gives a half-revolution to the bevel-wheel 81 and crank shaft 82, and the crank-pin 83 gives motion through a link, bell crank, and segment gear to a pinion on the shaft of the sprocket-wheel 90, Fig. 1, which, through the chain 91, pulls the carriage 56 from one side of the loom to the other. Small wheels 93 on the carriage 56 electrically engage and travel upon track rails 94 on the track 92 The rails are connected with an electric generator, and the current passes through the wheels 93 and electromagnets 57, which act on armature rollers 103, Fig. 15, to propel the shuttle 58. The rollers 103 are provided with bands 107 of rubber, felt, or like material, which prevent the warp wires 24 from being moved. In the shuttle frame is the weft bobbin 202. Shuttle-races.-The race 98 is a plain metallic plate carried by the lay-beam frame 29, and, when the frame 29 is in its rear position, the race lies close against the lower side of the warp wires, but, when the lay moves forward, it is tilted downward from the cloth by the rods 101, Fig. 3. Checking shuttles; stop-motions.-The shuttle 58, on arriving at one end of its line of motion, drives the rod 109, Fig. 15, against the action of the spring 111, and pushes the spring contact 110 between the plates 112, the shuttle moving on the support 108 at the side of the loom. As the lay moves forward and gathers up all slack in the weft, the rod 120, Fig. 1, allows a spring to act on the presser block 114, which descends and holds the bobbin firmly. As the lay moves back, the block 114 is raised, and then the carriage 56 is actuated and draws out the shuttle, and the spring 111 withdraws the contact-springs from the plates 112. The electric circuits are shown diagrammatically in Fig. 6. The switch-arm 146 is moved between the contacts 147, 148 by the heald frame 28. The current passes from one rail 94 through the electromagnet 41 and the switch 146 to one plate 112, the other being connected to the other rail. When the spring contact 110 is pushed between the plates 112, the circuit is completed and the magnet 41 energized to permit another revolution of the shafts 135, 138, but, if the shuttle is stopped in the shed, the circuit is not completed and the loom stops. Let-off motions.-A sprocket-wheel on the shaft of the warp beam 23 is connected by a chain 122 with a sprocket-wheel on the shaft 124, which has, at its other end, a sprocket-wheel 125, on which is looped the endless chain 126. This chain passes round a pulley wheel 127 and small sprocket-wheel 128 connected with a band wheel 129. The brake band passing round the pulley 129 is controlled through the lever 132 and rod 135 by weights 140 suspended from the axle of the pulley 127. These weights 140 serve to regulate the warp tension, and may be raised by suitable mechanism at every revolution of the shaft 135, thus permitting warp to be regularly let off.