Patent GB-210570-A (GB)
Title: Improvements in machines for exchanging the bobbins in and threading lace machine carriages
IPC: D04C1/00
Filed: 1922-11-25
Abstract: 210,570. Jardine, Sir E., and Dalby, F. Nov. 25, 1922. Bobbins, removing from and inserting into carriages.-Relates to improvements in machines of the kind in which the carriages are delivered from a magazine into revolving carriers which transfer the carriages first to a mechanism for extracting the emptv bobbins and then to a mechanism for inserting full bobbins into the carriages and threading them. The carriers A each consist of a skeleton framing attached to or formed integrally with a central disc B which rotates in a recess in a table C. To obviate risk of the carriages slipping under the carriers A, the table is grooved concentrically at C<1> and extensions A<1> on the undersides of the carriers slide. therein. The disc B is supported and driven by a shaft D mounted on a pedestal and carrying a frictional stop device E, E<1>. The wheel E<1> is loose on the shaft D and is driven by bevel gears K, F<1> from the shaft J, and frictionally engages the wheel E which is fixed on the shaft D and is provided with a flange F on the outer edge of which are mounted stops F', Fig. 5, equal in number to the carriers A. A cam-actuated stop lever G is moved clear of one stop F' after holding it for the requisite period of time and is moved into the path of the next stop just in time to engage with it. the inner end of the stop lever G being drawn on the step F<2> of the stop by a spring. If a carrier is held back by any obstruction, the wheel E is checked and the lever G misses the step F<2> and consequently is moved a distance greater than normal by its spring. This additional movement, is utilized to disconnect the main shaft J from the source of power, such as by depressing one end of a catch lever carried by the clutch-control lever L, the other end being thus lifted out of a notch in a fixed slot N<1> to release the lever L. The carriage magazine 0 is formed with a lower part 0<1> limited in height and out of register with the upper part 0, the lowermost carriage in which rests clear of the table C on the top of the lower part 0<1> and in an opening in a reciprocating plate P. This plate transfers the carriage to the lower part 0', whence it drops into a carrier A. The middle of the base of the lowermost carriage may be supported by a member Q, pivoted to a lever Q<1> and connected by a link Q<2> to the. plate P. The bobbin ejecting mechanism consists of a cam-operated arm R, Fig. 8, with a swell R<1> which depresses the bobbin at the same time that a finger R<2> engages the bobbin hole and begins to move the bobbin out of the carriage. The bobbin inserting and threading mechanism comprises a slide S', Fig. 12, working below a magazine S the outlet opening of which has a yielding abutment T permitting the passage of a bobbin which has been opened out to more than the normal extent. The thread arm U, Fig. 10, is provided with a fixed part U' and a pivoted finger U<2> forming a. fork in which the thread is held during the threading process by a spring V coming into contact with the finger U<2>.