Patent GB-190407902-A (GB)
Title: Improvements in Sewing Machines.
Inventor: BAKER FREDERICK
Filed: 1904-04-05
Granted: 1904-05-05
Abstract: 7902. Baker, F. April 5. Lock-stitch shuttle sewing - machines ; spools and the like, winding ; thread - cutters thread-end holders governing under thread.-The invention consists in means for automatically winding a spool of cotton and inserting it into the shuttle when required by moving a lever, and is an improvement on the machine described in Specification No. 8494, A.D. 1903. A spindle A, capable of longitudinal movement, is carried in the bed C of the machine, its direction being such as to coincide with the axis of the shuttle N when the latter is fully retracted. The spindle is driven by a pulley all and a band a<a>, the pulley being engaged with the spindle by a clutch controlled by a fork on a link e', which is actuated by a hand-lever e<3>. The thread B passes through fixed guides b<1>, b<2>, and underneath a gripping spring a<6> on the spindle, and is laid evenly as the spindle rotates by a guide D. The latter consists of a lever pivoted at d<1> and moved to and fro by a cam d<2> and worm-gearing d<3>, which is driven by the band a. A tappet g<1> projecting from the cam d<2> drives a pin-wheel G, the number of pins on which correspond with the number of double layers of thread wound on the spindle A, and, when enough thread has been wound, a lug g<3> of a pivoted arm g<4> engages with a trip lever e<4>, e<5>, moving the latter out of engagement with a bracket e<8>, and allowing a spring s<1> to disengage the clutch, so that the spindle ceases to rotate. When the shuttle thread gives out, the operator places the shuttle so as to be in line with the spindle A and then actuates the lever e<3>. This acts on a sleeve E which moves the spindle up to the shuttle and strips the spool off it, pushing the spool on to a sleeve n<1> carried by a pin n inside the shuttle. While this operation is proceeding, a fork f forces the cotton past a retaining catch n' upon the shuttle, while the fork on the link e<2> causes the movement of a lever m which opens a shears K against the action of a spring k<1>. The shears are locked in their open position by a catch k<2>. The lever e<3> and fork f are now moved back to their normal positions and the machine set going, upon which the catch is released so that the shears sever the thread, the shuttle end of which is drawn up into the work for the first stitch. The return movement of the lever e<3> also causes the fork on the link e<2> to actuate a lever H, which engages with the portion of the thread stretched between the shuttle N and guide D, and draws it beneath the gripping spring a<6> on the spindle, the latter being previously turned so that the spring a<6> stands out horizontally from one side of the spindle by the engagement of a spring e<7> with a double-faced cam a<9> fixed to the spindle. At the end of the forward movement of the shuttle, the thread is drawn into a slot u<1>, Fig. 9, and as the shuttle commences to return, the thread is drawn along this slot and between projections u<2>, R, which are so disposed that, after having once passed them, the thread cannot return. Upon the next forward movement of the shuttle, the thread is drawn into a groove u<3> and then under the usual tension piece P and retaining catch p<1>. In a modified form, the end of the sleeve n' in the shuttle is split into two or more parts to allow a certain amount of give when the spool is pushed over it.