Patent GB-189715243-A (GB)
Title: Improvements in Grain Bagging Machines.
Inventor: HENRY JAMES WILLIAM
Filed: 1897-06-25
Granted: 1898-01-22
Abstract: 15,243. Henry, J. W., Gunn, A., and Ward, H. P. June 25. Sack-holders.-Relates to a machine for holding sacks open, passing them on to be filled with grain, passing them to a sewing-machine to have the mouths sewn up, and then discharging the filled and closed sacks from the machine. The machine consists of a framework in which a central shaft B is secured, and of a revolving carrier mounted freely on the said shaft. The carrier consists of an upper frame and a lower table mounted on collars on the shaft B and secured together by adjustable standards so that the distance between them can be regulated according to the size of the sacks to be filled. The said upper frame carries four sack-holders, each consisting of a fixed segmental jaw F<1> and two hinged segmental jaws F<2> and F<3>. The jaws F<2> and F<3> have fixed spikes or teeth F<4>, while the jaws F<1> are provided with retractable teeth which can be withdrawn by hand-operated mechanism. The jaws F<2> and F<3> are pivoted to operating-rods G fitted with springs which tend to keep the said jaws closed as shown at the right and left of the Figure. The rods G have chains attached to them leading to treadles mounted on the revolving carrier so that the jaws can be opened at will. In addition to this, the jaws are opened automatically during a portion of their travel, by means of a fixed cam G<10> engaging rollers G<9> on the bars G. The revolving carrier is driven intermittently from the main shaft D by the following mechanism :-A ring of teeth is provided on the said carrier, and a tooth on one arm of a bell-crank lever mounted in a sliding block E<2> engages with the said ring of teeth. The other arm of the bell-crank lever is connected by a rod E<1> with an eccentric E on the shaft D' driven by bevel gearing from the shaft D. The bell-crank lever is mounted in the block E<2> in such a way that the action of the eccentric tends to operate the tooth and also reciprocate the block. When in the position shown at the bottom of Fig. 1, the jaws F<2> and F<3> are opened by the treadle above referred to, and the sack is placed on the hooks F'. The treadle is then released, and the jaws F<2>, F<3> are closed, forcing the sack over the points F<5>. The revolving carrier then moves forward, and the cam G<10> opens the jaws F', F<3> again as shown at the top of Fig. 1, in which position the sack is filled. The revolving carrier then carries the sack forward, the cam G<10> ceases to act, and the jaws F<2> and F<3> are again closed, and the mouth of the sack is carried through a sewing-apparatus K. The sack is then returned to the original position at the bottom of Fig. 1, when the teeth F<5> are first withdrawn and then the treadle is depressed to open the jaws, and at the same time a board 0 is tilted and throws the filled sack out of the machine. The sewing- apparatus K comprises a fixed disc having an annular race for a semicircular needle and a cam-groove for controlling the action of the needle-drivers. The said disc is also formed with a recess which extends across the needle race and through which the mouth of the sack is moved by the revolving carrier. The needle is driven by means of two drivers which engage holes in the needle and which are withdrawn temporarily from the needle as each driver crosses the recess by the action of the camgroove in the fixed disc. A rotary disc on the end of the main driving-shaft D is formed with radial grooves in which the needle-drivers lie, so that they are carried round to drive the needle. The needle is formed with a cavity in which a coil of thread wound in a special manner and a tension device are placed. An arrangement is described by means of which the first stitch is locked. The needle then continues to sew overedge stitching.