Patent GB-190407480-A (GB)
Title: Improvements in Machines for Reproducing Designs in Cut Pile on Velvet.
Inventor: RIFFARD JEAN FRANCOIS MARIEN
Filed: 1904-03-29
Granted: 1905-02-09
Abstract: 7480. Riffard, J. F. M. March 30, A.D. 1903, [date applied for under Patents Act, A.D. 1901]. Pile-cutting; designs on face, producing.- Designs in cut pile on plain or figured velvet are reproduced from an engraved covering on a cylinder, through which covering an electric circuit is completed, to operate the cutting-devices. Silk, wool, cotton, or shoddy pile fabrics may be treated in this manner. The fabric passes from a casing 1, Fig. 3, round a pin-roller 5, over a glass roller 49, under a regulating-plate 50, and over a pin-roller 4, and the pile is cut, as required, by revolving discs 90, 91, 92, 83, Fig. 4, mounted in ball bearings capable of sliding in grooves in a bracket 83. The bracket is mounted on an eccentric axis 82 supported in arms bolted to a sliding frame 52, and the axis can be rotated to raise the cutters into position for sharpening. The frame 52 is fitted with ball bearings, and is reciprocated on rods 55, 56 by a reciprocating bar 20, to which it is adjustably connected by a hinged arm and set-screw. Brackets 68 fixed to the frame 52 support pairs of electromagnets 69, 70, 71, 72, below which armatures 128 are arranged. The electromagnets are excited from a sliding frame 8 constructed and similarly operated to the frame 52, and carrying contacts 108 moving over an engraved covering on a cylinder 7. The contacts may be formed of copper wire partially embedded in non-conducting material. and so arranged that when the wires make contact with the engraved covering, circuits are completed through rods 111, 112, 113, 114, bars 115, 116, 117, 118, and rods 78, 79, 80, 81, to the several pairs of electromagnets. Each pair of magnets on becoming excited attracts the corresponding armature 128, Fig. 7, which acts through a pivoted forked lever 132 to depress vertical sliding rods 136 carrying shoes 148 fitted with sliding needle blades 143. In addition to depressing the shoes 148, the attraction of the armatures causes a cone 140 to act through pivoted levers 141, 142 to project the needle blades from their slides, the needle blades burying themselves under the pile threads and raising them so as to be cut by the discs. Springs return the needle blades, rods 136, and cone 140, when the circuit is broken at the engraved covering. The bearings of the cutting-discs, which are movable in slots in the brackets 83. are mounted in a pivoted frame 105 adjustable by a set-screw 107 so that the discs may be moved out of line to produce four lines cut at the required distance apart. The rods 21, 20 for operating the disc-slide and the contact-slide respectively are reciprocated by pivoted bell-crank levers adjustably and independently oscillated from crank discs on the main shaft. A cam-shaft from the main shaft carries a belt pulley for driving the cutting-discs, and a cam for oscillating a pivoted bell-crank lever, which is adjustably linked to pawl levers 34, 35, Fig. 3, driving ratchet-wheels 39, 38. The wheel 39 is fixed to a shaft 40 carrying worms for driving the roller 4, 5 at an equal speed, and the wheel 38 is fixed to a sleeve mounted in ball bearings on the shaft 40 and carrying a worm for driving the cylinder 7 on which the engraved covering is secured. By this arrangement, a reproduction, which may be enlarged or reduced, of the relief portions of the engraved covering is made in cut pile, but a reproduction of the engraved portions can be effected by inverting the cone 140 carried by the armature 128 and pivoting the forked lever 132 so that the attraction of the armature raises the rods 136. A modification of the machine for reproducing designs on Amiens velvet, in which the pile comes from the weft, consists in mounting the cutter-disc slide 6, Fig. 13, on transverse arms, which are supported on shafts 56, 56<a>and carry nuts engaging screws 154, 155. A shaft 10 drives, through reversing-gearing 167 and a cross shaft and bevel gearing, the worm shaft for driving the rollers 4, 5 and cylinder 7, and rods are fixed at each end of the piece of fabric under treatment, which rods, when the fabric has passed through the machine, come against pawls 164, 165 so as to act through a rod 166 to reverse the gear 167 and actuate ratchet-wheels 156,157 on the end of the screws 154, 155. By this arrangement, the piece is traversed backwards and forwards through the machine, and at the end of each traverse, the slide 6 is traversed a short distance along the screws 154, 155 so that the cutter discs act on a fresh portion of the piece. In this method, the discs act in succession, and consequently the contacts for completing the electric circuit must be set at angular intervals in accordance with the distance between the discs.