Patent GB-190307703-A (GB)
Title: Improvements in Rotary or Straight-bar Knitting Machines.
Inventor: ALDRIDGE CHARLES HENRY
Filed: 1903-04-02
Granted: 1904-02-25
Abstract: 7703. Aldridge, C. H. April 2. Straight-bar knitting-machines. -- In machines of Cotton's type for making plain or ribbed openwork fabrics, improved means are employed for controlling the end motion required for lace points "droppers," and the jacquard card cylinder, and also other parts such as the embroidery thread carrier. The rods which transmit the end motion are connected rigidly by collars and brackets to a screwed shaft C', Fig. 7, mounted at the end of the machine or are held up to one bracket by weights or springs. An arm, sliding between guides, is fixed to the shaft C<1> and keeps it from rotating. End motion is imparted by a compound nut C<8> C<9>, which is rotated by a pin-wheel C<10>. Any side play or back-lash between the nut and its bracket is removed by sliding a sleeve E fixed to the part C<9>, over the part C<8>, and securing the combination in the new position by nuts E<2>. In a modification, the boss C<8> C<9> is fixed to the bracket, and the pin-wheel C<10> rotates the screwed shaft C<1> ; in this case, the rods from the lace points &c. are rigidly connected to a loose bracket which is forced to take the end motion of the shaft C<1> by collars fixed to the latter. The pin-wheel C'‹ is given an intermittent motion by clawkers actuated by a cam on the main shaft and thrown into or out of action by a second cam situated between the clawkers and actuated as described in Specifications No. 7252, A.D. 1896, and No. 2651, A.D. 1897. The mechanism for controlling the clawkers described in Specification No. 3727, A.D. 1900, may be applied in a modified form to the above mechanism. A pattern chain G passes over a chain-wheel mounted with a ratchetwheel and pawl lever on a rocking arm G' and is moved on at each downward movement of the latter by a fixed stop, which strikes and rotates backwards the pawl lever. Studs of various height thus come in turn under the hanging rod G<11> and lift it, as the arm G' moves upwards, thereby rotating the wheel G<8>. The clawkers are pressed by the spring G" against pins on the levers K, K<1>, which have pins K<6>, K<5> bearing on the periphery of the disc G<8>. A short stud G<6> causes the disc G<8> to rotate sufficiently to allow a pin K<6> on the lever K<1> to slip into a notch G<16>, thereby allowing the clawker C<13> to move inward: and engage the pin-wheel C<10>. A long stud G<5> puts the clawker C<12> in action in a similar way. A hanging rod L<4> may also be lifted by studs and thereby rotate a bell crank L<5> moving a U pisce L<6> into one of the positions shown in dotted lines. On the descent of the clawkers, ono of the stops L, L', which close the top notches of the clawkers is thereby lifted out and the clawker racks the pin-wheel two teeth. The rods G", L<4> are separated by a lever M<1>, Fig. 12, in the position shown and both rods may be lifted by the row of studs B, Fig. 13, which may represent the repeating portion of the pattern on an openwork stocking. By pushing the lever M' forwards, the rods G<11>, L<4> are pushed apart, the latter rod being held out of range of the studs, whilst the former is acted on by the row of studs A, which may represent the pattern for the bracelet or heading of a stocking.