Patent GB-767404-A (GB)
Title: Improvements relating to warping machines
Inventor: PORTER ALLAN WILLIAM HENRY
IPC: D02H3/00
Filed: 1953-10-05
Abstract: 767,404. Warping and beaming machines. F. N. F. MACHINERY MANUFACTURING CO., Ltd. [formerly F. N. F., Ltd.]. Jan. 4, 1955 [Oct. 5, 1953 ; Jan. 4, 1954], Nos. 27337/53 and 178/54. Class 142 (1). The braking force available to stop a beam 18, Fig. 10, is continually adjusted during winding by a feeler 89 resting on the warp sheet 53, the feeler being pivoted in the head 92 of an arm 88 mounted on a shaft 80. As the beam fills the warp sheet 53 deflects the feeler, which operates a microswitch in the head 92 ; a solenoid - operated clutch (not shown) is thereby closed to drive a reduction gear 104A which, through a chain 110, turns a cam 79 to rock a lever 76 ; the other end of the lever constitutes the anchorage for a spring 62 whose tension is thereby altered in accordance with the mass of the beam 18. As the cam 79 rotates, it pushes on a pin 114 on the arm 88 to raise the arm until the feeler 89 regains its original position in the head 92, whereupon the microswitch opens and the movement ceases. The upper end of the spring 62 is attached to an arm 63, Fig. 5, on a shaft 64, the pull of the spring acting through an arm 65 and a link 66 to turn a lever 67 clockwise; the lower end of the lever 67 surrounds a stud 61 and presses on a collar 70 to cause brake shoes (not shown) to expand against a brake drum formed in the pulley 10. A cable 74 coupled to the lever 67 operates a similar brake at the other end of the machine. Tensioning warp. Three guide rollers 57, 58, 60, Fig. 8, round which the warp passes in succession, are braked by shoes 169, 170, 171 operated by push rods 176, 177, 178, the forces being proportioned by balance levers so that the roller 57 is braked least and the roller 60 most; thus, the rods 176, 177 are attached to the ends of a lever 181 pivoted at 180 on a lever 179, to the opposite end of which the push rod 178 is attached, loading being applied to an intermediate point by a plunger 175. At the right-hand end of the machine, the load is supplied by a weight 184, Fig. 4, on a lever 185 having a short arm 187 (see also Fig. 8) acting on the plunger. At the lefthand end of the machine, the rollers are braked in a similar manner, but the load is supplied by a spring 265, Fig. 4, acting upwardly on the plunger. Starting and stopping. A hand rail 133, Fig. 4, extending over the machine so as to be accessible from the front, is pivoted at the back on a shaft 132 having arms 131, 134 abutting rods 128, 135 loaded by springs 129, 136 which bias the rail to its uppermost position. In the condition shown, the main clutch (not shown) is open, the beam is braked by a force depending on its weight as described above, and the braking forces on the left-hand ends of the guide rollers are augmented (beyond the amount provided by the spring 265) by springs 197, 198, 199 acting directly on the push rods of the brake shoes. On pulling the rail 133 downwards to start the machine, a ramp 141 on the rod 128 rocks the arm 65, Figs. 4 and 5, whereby the beam brakes are released by the mechanism 66, 67, 61 and the cable 74, Fig. 5. At the same time, a link 206, from the lever 67 to an arm 205, rocks a shaft 204, causing forks 201, 202, 203, Fig. 4, to compress the springs 197, 198, 199, thereby relieving the guide rollers of the extra braking load. Continued depression of the rail 133 causes a ramp 140 to rock an arm 143 whereby the driving clutch of the machine is engaged. This final movement of the rod 128 operates a microswitch 153 which energizes a solenoid to engage a latch (not shown) behind a collar 130 on the rod to keep the parts in the running position. The machine can be stopped by deenergizing the latch solenoid by means of manually-operated pushbuttons or automatic stop motion droppers 55, Fig. 8, whereupon the spring 129 returns the rod 128 to the position shown in Fig. 4. Headstocks. The beam 18, Fig. 5, is supported in the machine by a slidable spigot 23 in each headstock, operated by a hand lever 29, entering a bush 24 in the ruffle 17 ; the drive from the combined pulley and brake drum 10 is effected by a spring-loaded dog 19 engaging a notch in the flange 16 of the ruffle. An identical arrangement in the other headstock couples the beam to a brake drum. Lifting beam into machine. The beam is lifted from floor height into alignment with the headstocks by a pair of arms 38, Fig. 13, actuated by hydraulic jacks 41 fed by an electrically-driven pump 46 manually controlled by a rod 47 extending to the front of the machine. Rollers 51 on the arms are adjustable in height by screws 52. Reference has been directed by the Comptroller to Specification 720,310.