Patent GB-190314355-A (GB)
Title: A New or Improved Machine for Tying Down Mattresses, Upholstery and similar Work
Inventor: HADDAN HERBERT JOHN
Filed: 1903-06-27
Granted: 1903-08-27
Abstract: 14,355. Haddan, H. J., [Burnett-Miller, A.]. June 27. Tying or knotting; needles; needle-threaders.- Relates to a machine for tying-down or looping and knotting thread, cord, tape, twine, ribbon, yarn, or the like through mattresses, upholstery, and similar work. The work W, Fig. 7, is placed on a work-plate A and engaged by a presser-foot B carried by a reciprocating slide B<1>, Fig. 28. Two needles C, Figs. 7, 27, and 28, carried by a reciprocating slide C<1>, are forced through the work and receive a thread length from a thread - feeding mechanism, Fig. 7, located below the work plate. The ends of the thread length are drawn through the work on the upward movement of the needles, and are delivered to a knotting-mechanism, Figs. 28 and 36, located within the presser-foot B and carried by the slide B'. The needles C comprise points c formed with open eyes c<9> and having reduced shanks c<1>on which are mounted tubes c<2> provided with lips c' for closing the eyes. The shanks c<1> are provided with nuts c<3> held m engagement with an arm c<4> of the slide C' by a leaf spring c<5>, and the tubes c<2> pass through sleeves c<6>, screwed into an arm c<7> of the slide C', and are secured in a block c<8> disposed between the parts c', c<6>. The work-plate A, Fig. 7, is curved to form a casing for the thread-feeding mechanism. A presserplate A', Figs. 7 and 12, is secured to the plate A and provided with needle holes A' and a curved slot A<3> forming a horn A' for holding the thread loop. The thread-feeding mechanism, Fig. 7, comprises two gripper jaws carried on a grooved revolving disc D' and adapted to draw the thread from a spool E and past a cutter F to guiding- fingers F<6>, F', which move the thread laterally into the open needle eyes. The disc D' is mounted on a shaft D<3>. One gripper jaw is fixed to the disc D', and the other jaw D<1> is pivoted to the disc and pressed towards the fixed jaw by a spring, and provided with an arm d' for contact with cams d<1>, d'. The thread passes from the spool E through a slot E<1> of a thread-holding block E<2> and under a tension finger E<3>, and is directed between the cutter blades by a yielding guide-finger F<1>, which is carried by a shaft F<2>, mounted in a block F<3>, and is held against a stop F<4> by a spring f on the shaft F'. The cutter blades are connected by links f<1> to a slide f, which is provided with a roll f<3> engaging an adjustable graduated cam f<2> mounted on the disc D<2>. The cam f<2> is provided with gear f and a corresponding pinion is movably carried on the disc D<2> by a bolt provided with a thumbnut f<7> The gear f and the pinion are formed with wedge-shaped teeth, so that the cam f<2> can be firmly clamped by drawing the pinion towards the disc D'. The guide-fingers F<6>, F<7> are pivoted on the work-plate A and pressed by springs F<9> against a block provided with guard-plates F<11>, and, as the gripper passes the fingers F<6>, F<7>, they yield and then spring forward and carry the thread laterally against the block and into the needle eyes. The cam d' is formed on an adjustable block d<5>, which is guided in a groove on the plate A and moves over a scale and is secured by a binding-screw d<6>. A fixed finger and a spring finger F<13> are provided on the disc D' behind the gripper, to retain the thread in the disc groove and ensure proper action cf the fingers F<6>, F<7> for short thread lengths. The thread is held against the horn A<4>, Fig. 12, by a clamp which is spring-supported and pivoted on a slide actuated by a cam on the shaft D<3>, Fig. 7, against the action of a leaf spring g<2>. The needles pass through thread-holders of the knotting- mechanism. The holders consist of tubes h, Fig. 36, provided with spring gripping-fingers h,' and formed in a block h<2> on a sleeve h<3> mounted in a plate B' and a bracket B<3> on the slide B'. The sleeve h<3> is rotated to wrap the thread ends about a knotter tube I projecting below the sleeve, and the threads are retained in place on the tube I by a spring finger. During the second revolution of the sleeve h<3>, it is moved downwards, so that the threads are laid across the end of the tube I and into a thread-drawing hook J, and, at the end of the second revolution, the thread-holder h at the right strikes the spring finger and moves it back so that the loop can be drawn off the tube I. The hook J is formed on a rod J<1>, which extends through the tube I, and is adapted to be drawn upwards to carry the thread-ends through the loop and into a slot I<2> in the tube I. The slot P is of such size that the threads are clamped to a certain extent between the sides of the hook and the sides of the slot, so that the hook pulls the threads and draws the loop off the tube 1. As the knot is tightened, the tube I is moved downwards, to carry the knot down close to the surface of the work. The knot may be tightened against the end of the tube I. In order to avoid entrance of the knot into the slot P when using thin thread, it is preferred to provide a tightening-pin K on the end of the tube I. The knotting-devices are mounted on the slides B', C<1>, Fig. 28, and are so arranged that they are operated by relative movement between the slides. A rack h<4> on the slide B<1> engages a pinion connected through bevel gear b<6>, h<7> with the sleeve h<3>. The pinion and the gear h<6> are mounted on a stud on the slide B', and the gear h<7> is mounted in the bracket B<3> and feathered on the sleeve h<3>. Locking-ribs h
, h<9>, above and below the rack h<4>, are adapted to engage and move through a recess in one side of the pinion. The sleeve k<3> and the tube I are moved downwards by means of a cam-slot in a plate h<12> on the slide C<1>. A bell-crank lever h<4> on the slide B<1> is provided at one end with a pin h<13>, engaging in the cam-slot, and at the other end with a pin engaging in an annular groove in a collar h<16> on the sleeve h<3>. The tube I is, similarly, operated by a bell-crank lever i<1>, and is held from rotation by an arm i<3> provided with a pin for engagement in a hole in a bracket i<6>. The rod J', Fig. 36, is connected by an arm j<3> to a slide rod j<1> engaged by a lug j on the slide C<1>. The lug j is in the form of an adjustable screw provided with a conical button j<4> for engagement between spring jaws j<5> on the end of the rod j<1>. The various parts of the machine are driven as follows :-The slide C' is operated by a cam C', Fig. 1<a>, secured on a shaft C<3> and actuating a bellcrank lever C' connected to the slide, and the slide B' is similarly operated by a cam B<4> on a shaft B<5> and a bell-crank lever B<6>. The shafts C<3>, B<5> are connected by gear L', L, L', and the gear L<2> engages a pinion L<6> on a shaft L<5>, which is also provided with gear L<4> engaging a pinion L<3> loose on the shaft B<5>. The pinion L<3> is provided with a clutch member L' for engagement with a clutch member on a driving-pulley L<8> also loose on the shaft B<5>. The pulley L<8> is held normally outwards by a spring L<9> on a treadle-rod L<1> connected to one arm of a bell-crank lever L", the other arm of which has a pin-and-slot connection with an arm L" of a second bell-crank lever, the other arm L<13> of which is provided with a yoke L<14> connected by pins L<15> with an annular groove in the hub of the pulley L<8>. The shaft B<5> is normally locked by engagement of the pins L<15> with shoulders L<17> of a cam L<18> on the shaft. When the pins L<15> are moved forward, the cam L<18> rides over them and holds the pulley L<8> forward for one revolution. Adjustable connections are provided between the lever B<8> and the slide B' and cam B<4>. The cam B<4> acts upon a roll B<7>, Fig. 3, mounted on a stud B<8> carried by a lever B<9> connected to the lever B<6> by links B' and adjustable eccentrics B" mounted on the stud, which is locked by a nut B<15> and provided with a handle B<12> having a pin B<16> for engagement in holes in a segment B". The slide B<1> is mounted so that it is always raised to the same central position, the connection between the lever B<6> and the slide B<1> allowing of continued movement of the lever after the slide has reached its upper position, if necessary. The side B' is connected with the lever B<6> through a block pivoted on the slide and working in a slot in the lever. The lower side of the slot is formed by a jaw b<1>, Fig. 6, which is pivoted to the lever and held normally parallel to a fixed upper jaw by means of a spring-pressed locking-pin b<4>, which is mounted on the fixed jaw and normally engages in a slot in a plate b<6> carried by an arm b<7> of the jaw b<1>. A ledge b<8> on one side of the slot in the plate b<6> is arranged to engage a pin b<9> on the slide B'. As the slide B' reaches its upper position, the pin b<4> rides over the inclined end of a pin b<1> on an arm b<11> on the slide and is forced out of the slot in the plate b<6>, unlocking the jaw b<1>. When the slide is in the upper position, the pin b<9> is sustained behind the pin b<1> by the ledge b<8>, and the pin b<1> rides in the slot in the plate b<6> and controls the swinging movement of the jaw b<1>. The thread-feeding mechanism is operated from an intermittentlyrotated shaft D<4>, Fig. 1<a>, which is geared so that each half-revolution gives a complete revolution of the shaft D3, Fig. 7. The shaft D' is given two quarter-revolutions during each revolution of the shaft B<5>, by means of a disc D<9> provided with pins D<1>, Fig. 4, for engagement in slots D" in a disc D<12>, locking-segments D<13>, D<14> on the shaft B<9> co-operating with locking-segments D<15> on the disc D".