Patent GB-191218909-A (GB)
Title: Improvements in or relating to Twist Lace Machines.
Inventor: JARDINE ERNEST
IPC: D04C5/04
Filed: 1912-08-19
Granted: 1913-07-10
Abstract: 18,909. Jardine, E., and Montgomery, H. Aug. 19. Lace machines.-A practically continuous carriage thread supply is provided in twist-lace machines by automatically removing each carriage in turn and substituting another with a full yarn supply while the machine is running, the whole set of carriages being thus replenished during the period of working off the ordinary supply of thread. In the case of a machine with two tiers of carriages, the substitution takes place when a carriage which has reached the end of the back tier is about to be turned into the front tier, each carriage passing round the machine a suitable number of times before removal. The replacement carriages A' are placed in a magazine A at one end of the machine and are fed at intervals by a slide A' on to a hinged plate A<3> which when brought to the full-line position, Fig. 8, drops the carriage into the space B<1> of an exchanging section B. The space B<2> is for the end carriage of the back tier situated in the comb space C. The exchanging section B is mounted on a shaft B<3>, and after receiving a carriage A' is turned into the dotted-line position, Fig. 4, until it rests against and forms a continuation of the end combs C. The carriage is then in position for delivery to the machine, but is held by a stop B<6> while the end carriage which it replaces is removed from the machine. To effect this, the usual sector F for operating the turnagain pinion D is given an extra movement, so that the carriage may be carried up into the space B<2> of the exchanging section B on the pinions D, D', D<2>. The section B is then moved longitudinally until the full carriage A' is opposite the comb space from which the empty one was removed ; this brings the latter into the path of a lever G. The full carriage is taken into the machine by a reverse movement of the sector F, and the empty carriage is removed by the lever G into a shoot and is deposited in a suitable receptacle. The movements necessary to effect the substitution of carriages are mainly obtained from cams on an independent controlling-shaft which is caused to make one revolution at intervals determined by a cam which disengages a clutch and engages a brake, or vice versa. The threads of the carriages in the magazine A are held by a clip, and as the carriages pass into the machine the threads are cut out by a knife on the underside of the facing bar; the threads of the exhausted carriages are cut out in a similar manner by a knife on the point bar. In the case of a machine with one tier of carriages actuated by catch-bars the carriages are fed from the magazine on to a bed-plate a, Fig. 18, and are taken by a saddle a', the end of which fits the carriage, on to a plate c, pivoted to a slide b<1> which carries a stop b<2>, also fitting the carriage. The slide b<1> then feeds the carriage towards the combs d', d<3>, and it is tilted up by the engagement of a fixed stop with a tappet on the plate c. The carriage is thus presented in a vertical position and is caught on the front catch bar e, Fig. 24, which is made longer than the back bar e<1> for this purpose. The front combs d<2> are then shogged to the left and on the next motion, the carriage is drawn into the back combs d<3> and away from the plate c, which retires. The front catch and front comb bar are connected and are shogged together. The slide b<1> is given a quick in-and-out motion at the end of its traverse by operating it through a crank-pin g<2>, an intermittently moving wheel g<1>, a slotted lever f in which the pin g<2> slides and a link f<4>. The pin g' is not connected directly to the wheel g<1> but is mounted on a radial slide g<3> in the face of the wheel, and is moved radially when the slide b<1> is completing its inward movement by a roller g<4> running into a depression g<6> of a disk g<5>, thus imparting an extra movement to the slide b<1>. The exhausted carriages are removed from the other end of the machine by mechanism of the same general character as is described above. As each carriage is withdrawn, its thread is cut out by a knife on the comb bar.