Patent GB-191312452-A (GB)
Title: Improvements in Warp Drawing Machines.
IPC: D03J1/14
Filed: 1913-05-28
Granted: 1914-04-09
Abstract: 12,452. Marks, E. C. R., [Miller, L. A.], May 28. Healds, warp - stop detectors, and reeds, threading.-In a warpdrawing machine, the actions of the heald or detector feeding and positioning mechanism and of the reed-feeding mechanism are suspended if the thread selector fails to engage a warp thread, thus enabling the thread selector to make successive attempts to engage a thread. The healds or detectors are fed singly from the sloping bottom of a hopper 18, Fig. 1, and through a guideshoot by chain - driven friction rollers, the discharge from the hopper being controlled by an oscillating escapement device. When a heald &c. a is in position for threading, it engages a slot in a mandrel 69. Fig. 8, which subsequently turns so as to withdraw the heald &c. from the path of the drawing-in needle 177. The reed spaces are opened and the reed is fed across the machine intermittently by a rotating scroll 168 having an adjusting - screw 168<a>, which enables the feed to be varied. The warp threads are held in clamps 88, 89, the clamp 89 being moved by means of a handle 94 so as to tension the warps. The warp carriage is supported on rails 85, and is sensitively fed across the machine by ratchet gearing controlled by a finger 135, Fig. 21, adapted to engage the edge of the sheet of warps. A barbed hook 112 lifts the outermost warp thread, and the selected thread then springs laterally away from the rest of the warps, which are held deflected between the clamps 88, 89, Fig. 8, by a notched bar 107. The selected thread is then engaged by a separating-device 139, 143, Fig. 21, carrying a shear blade 147, which coacts with a fixed blade 148 to sever the thread. Prior to severing, the thread is clamped by a rocking arm 149, Fig. 8, which presses the thread against one of a number of fingers 150. If no thread has been selected, the fingers 153 of an oscillating fork enter freely between the fingers 150 and bring into action mechanism which throws out of gear the auxiliary shaft from which the heald or detector feeding and positioning mechanism and the reed - feeding scroll 168 are operated. When a thread has been correctly positioned, it is seized by the needle 177, Fig. 8, and is drawn through the heald &c. a and reed c and also through a device 186, which coils the end of the thread so as to produce an enlargement for preventing the thread from being accidentally withdrawn through the reed. If the heald or detector to be threaded is not correctly positioned, the machine is stopped by a device comprising a feeler adapted to enter the eye of the heald &c. The threaded healds are strung on bars corresponding to the different heald shafts, the bars being moved by a cam to receive the healds in correct sequence. The clamp 88, Fig. 8, is formed in sections, which are opened successively as the warp carriage moves across the machine. Supplies of healds or detectors for re-charging the hopper 18, Fig. 1, are placed on the arms 26 of a rotatable spider 21, which is so arranged that as each arm is brought over the hopper it swings downwards and allows the healds &c. to slide into the hopper. The invention may be applied in connexion with cotton harnesses, a suitable device being employed for handling the heald-eyes.