Patent GB-478550-A (GB)
Title: Improvements in and relating to cop changing motions for looms
IPC: D03D45/20
Filed: 1937-03-18
Abstract: 478,550. Looms with automatic weft replenishment. SOC. ANON. A. SAURER. March 18, 1937. No. 8023. Convention date. March 21, 1936. [Class 142 (iii)] The rotary cop magazine 44 containing cops of different character corresponding to those in the shuttles in the multi-chambered shuttle box remains stationary until a feeler 3 pivoted on the lay indicates substantial weft exhaustion of the cop 2, whereupon, when the shuttle with this " spent " cop 2 again becomes active, and is about to be picked into the shuttle box beneath the magazine, the magazine is oscillated to bring into position beneath the transferrer 65 a cop corresponding to the spent cop. The cops may be arranged in the magazine in the order white, blue, red ; black, white, blue, and so on and after transfer, the magazine is given a normal forward rotation equal to the distance between successive cops of the same colour. The movements of the multichambered shuttle box according to the pattern, are merely transmitted from a shaft 47 to the cam lever 49 of a preparatory device, the magazine remaining stationary, so that refilling thereof is facilitated. The cam lever 49 carries a bevel wheel 48 gearing with teeth 42<1> on a lever 42, which is oscillated by lever mechanism from the shaft 47, and with teeth 50<1> on a lever 50 carrying a pin 51. A sleeve 75 on this pin carries a pawl 52 which can be set to engage any one, say 54, of several ratchet discs 53, 54, 55 fixed to the magazine. The parts 42<1>, 48, 50<1> form a differential gear, whereby the oscillating lever 42 moves the cam lever 49 to a position I, II, III oi IV according to the shuttle in action, the lever 50 remaining stationary. Just before transfer, a lever 19 which is normally rocked about a pivot 19<11> by a cam-controlled lever 21, is compelled to rock about a pivot 28<1>. A pin 14<11> on a link 18 connected to the lever 19 thereupon engages and rocks the cam lever 49, and the lever 42 being held stationary at this time, the lever 50 is rocked and the pawl 52 moves the magazine to place a cop of the correct colour in transfer position. The three ratchet discs 53, 54, 55 are used respectively according to whether cops of two, three or four different colours &c. respectively are being employed. These discs and also a ratchet disc 69 whereby the magazine is rotated after transfer are exchangeably bolted on a hub secured to the magazine shaft. Initiating oscillation of the magazine and cop transfer. The feeler 3 is rocked by a link 7 and a cam and spring controlled lever 9 and when the cop is substantially exhausted, an arm 4 raises a lever 6, which thereupon raises one of several hooked levers 32 into the path of a spring-controlled pawl 31 on a lever 29, which is normally rocked by a link 28 connected to the lever 19. The hooked levers 32 are carried by a frame 34, which is moved laterally on guide pins 35, in accordance with the multichambered shuttle box movements by a roller 40 engaging a cam groove on the lever 42. The raised lever 32 is moved into a notch 37<1> in a corresponding spring-controlled lever 37 and is thus held raised. When the substantially exhausted shuttle again becomes active, the raised lever being aligned with the pawl 31 stops the movement of the lever 29 and link 28. Consequently the lever 19 is compelled to rock about its lower pivot and the magazine is oscillated as described above. Moreover bv lever mechanism 14, 13 and a pin-and-slot con - nection to the lever 9, the feeler is withdrawn from the shuttle box to provide clearance for the ejected cop. The lever 14 also moves to the left a slidably guided adjusting member 56 and allows a spring-controlled protector lever 58 to move from a nib 62<1> on a spring controlled part 62 carried by the transferrer arm 65<1>. The part 62 thereupon moves into the path of a lay frog 67 whereby the transferrer is actuated. An adjustable screw 66 on the transferrer then engages and rocks the locking lever 37 and disengages this from the raised hook 32, which is provided with an auxiliary lever 36 for preventing the recess 37<1> of the lever 37 reengaging with the hook 32 when the transferrer returns to normal position. During the transfer, a pin 65<11> on the transferrer engages in one of several guide slots 88 on the magazine. A spring loaded pin lever 83, Fig. 7, on a lever 84', 84 attached to an adjusting rod 85 slidable in a stationary guide normally engages in one of the slots 88, a cam surface 56<1> on the member 56 having moved out of the path of the lever 841, 84, but if the magazine is incorrectly positioned, the pin 83 cannot enter a guide slot and the adjusting rod 85 which coacts with an arm 87, Fig. 8, connected with the part 62 prevents this from rising and consequently prevents operation of the transferrer. Rotating the magazine after transfer. The transferrer is connected by a link 80 and a pin- and-slot to a cam disc 72 turnable in one direction by a spring 78, and carrying a spring pressed two-armed pawl 70 engaging the ratchet wheel 69. The engagement of the pawl with the ratchet wheel is controlled by a roller 74 on an arm 7411 on the sleeve 75. The spring 78 is first stressed and subsequently, on the return movement of the transferrer, turns the cam discs, the pawl 70 turning the magazine until the pawl 52 which is also fixed to the sleeve 75 engages a notch of the ratchet disc 54, whereupon the roller 74 engages the pawl 70 and disengages it from the ratchet wheel. By means of a hand lever 76 fixed on the sleeve 75, the pawl 52 can be disengaged to enable the magazine to be fed forward by hand. A modification is described wherein the differential gear 42<1>, 48, 50<1> is replaced by an arrangement of rocking levers. Weft, cutting.-The protector lever carries shears 59.