Patent GB-191227872-A (GB)
Title: Pile Cutting Machines.
Inventor: LAKE WILLIAM EDWARD
IPC: D06C13/08
Filed: 1912-12-03
Granted: 1913-12-03
Abstract: 27,872. Lake, W. E., [Crompton Co.]. Dec. 3. Pile, cutting stop-motions.-Relates to velvetcutting machines, and consists in constituting the knife as part of the machine and mounting it to yield upwardly or swing laterally as required, and providing an electric stop motion actuated by the movement of the knife, and a mechanical stopmotion actuated by a bunch or seam of fabric. The endless web of fabric travels from the apron 4 at the rear of the machine over a feed-roll 5, down an incline 6, up over rails 7, down an incline 8, under a roll 9, over a rubber-covered roll 10, under rolls 11, 12, over a steel drag-roll 13, around rolls 13a, 13<b>, under the knife 2, over a feed-roll 14. a tension roll 15, and between feed-rolls 16, 17. The main shaft 19 drives a pulley 22 through clutch 47 to drive the feed-roll 14 by a belt 23. A pulley 25 on the shaft 19 is also connected to a loose pulley 27 on shaft 14 by a cross-belt 26, a small step of which carries a belt 28 for driving the drag-roll as a reverse feed-roll. Rolls 10, 16 are driven from, the drag-roll, and from the roll 10 are driven the roll 5 and the pulley 45 of the travelling apron 4. When the clutch lever 48 is moved to stop the machine, a bar 54 is moved to release a notch 53 on a rod 51 to allow a spring 50 to bring a brake-shoe 49 into contact with the flange of a pulley 30. In re-starting, a treadle 56 moves a bell-crank lever 62 to raise the rod 51 to take off the brake, the treadle-connexion being detachably connected to the clutch lever 47 by an arm 65. A latch 69 holds the clutch-rod 48 in the operative position. To reverse the feed if the knife flies out, a clutch 71 connects the pulley 25 to the shaft 19, the clutch 71 being also treadleoperated from a rock-shaft 66, which carries a sliding-collar 73 to which is attached a rod 75. A hand-lever 78, when pulled forward as shown in Fig. 2, raises the rod 75 into engagement with a latch connected to the clutch-lever 47, and when pushed back, lowers the rod 75 into engagement with the lever 84 of the clutch 71, thereby allowing the treadle to operate either clutch as desired. To reduce the speed of the roll 16 during reverse feed, the pulley 33, through which the roll is normally driven at a higher speed than the roll 13, is connected to the roll by a pawl and ratchet-wheel. During reverse feed, the roll is driven by pull of the fabric and is braked by a brake 90 on a lever 89 acting as a latch for the lever 78, which, when reversed allows a spring 92 to pull the lever 89 down, a pin 93 on the lever 78 entering a recess 94. To stop the machine by a bunch or seam, a leafspring 98 rests on the fabric and when raised, moves a rod 114 to release a stop 101 from a lever 102. The stop 101 is carried on a lever 100, the other end of which then rises to turn a connected rock-shaft 105 to move a stop 106 from its position supporting a tappet 107, the toe of which then rises into the path of one of a pair of levers 109 reciprocated by an eccentric 110. The lever 109 moves the tappet 107 together with the rod 54, to apply the brake, and through a bell-crank lever 112, to raise the latch 69 to allow a spring 96 to throw out the clutch 47. A sleeve 117, Figs. 8 and 9, on a bar 116 carries a U-shaped bracket 118 in which the knife-holder is pivotally mounted. The holder consists of two parts, the lower one 120 mounted between screws 122, and the upper one 121 having a shank with projections covered by collars attached to a spring 124. The part 120 is bored to receive the shank, and the shank is firmly attached to the lower collar and loosely to the upper collar, whereby the spring can turn the part 121 slightly relatively to the part 120. To limit the swinging movement of the holder, a pin projects into a slot on a bracket arm, while an adjustably-tensioned spring 133 acts on a plunger 132 to swing the holder back on its horizontal pivot when permitted. The part 121 is doubly slotted to receive the knife and its trunnions. When the knife leaves a race, the spring 124 turns the knife to the side already cut, and to bring it back to normal a bent pin 140 is provided on the part 121, which pin is engaged by a pin 142 on a sleeve 141 having a pin-and-slot connexion with the sleeve 117, when the sleeve is turned by hand. To prevent the knife-holder from turning on its horizontal axis during the cutting of the first race, the sleeve 141 carries a pin 147, which, when the sleeve is turned to reset the knife-holder rises to the apex of a slot 146 and prevents the holder from swinging as long as the sleeve is held in this position. When the knife leaves the race or projects through the fabric, the limiting-pin moves against the side of its slot to close a circuit from battery B through wire 149, pin contact, a spring contact on the holder, bar 148, wire 150, electro-magnet E, wire 157, contacts 155, 156, wire 154 back to battery. The armature 158 then moves a rod 160 to turn the shaft 105 and stop the machine. Movement of the latch lever 68 to release the clutch breaks the circuit at contacts 155, 156. The connexions of both stopmotions to the shaft 105 are slotted to allow of either being operated without affecting the other.