Patent GB-191309637-A (GB)
Title: Improvements in or relating to Machines for Threading Beads upon a Wire or the like.
Inventor: MIRZA ARDESHIR TEMULJI
IPC: H01B13/18
Filed: 1913-04-24
Granted: 1914-04-24
Abstract: 9637. Mirza, A. T. April 24. Beads, threading.- Apparatus for making electric cables by threading beads of insulating- material on to a conductor comprises a series of hoppers discharging beads into a series of stationary troughs, and means to pass a wire through the beads in the troughs; or, in a modification, a hopper discharges beads into a trough which is reciprocated so as to feed the beads on to a stationary wire. As shown in Fig. 1, the hopper B is provided with lugs B<1>, B<2> sliding on a rod D carried by a bracket D<3>, a spring D<2> being positioned between the lug B' and a fixed collar D<1> on the rod D. The lug B2 is connected by rods E' to a treadle E, the rods E<1> being made in two parts connected by a lost-motion device. The bottom of the hopper is provided with a pivoted spring-held gate F provided with a striking-arm F<3>. On depressing the treadle, the hopper is lowered and the arm F<3> strikes against a projection D<4> on the bracket D<3>; at the same time, a rod H secured to the hopper strikes against a tailpiece G<2> of a pivoted spring-held comb G, which lies over the trough C, so raising the comb and allowing the hopper to discharge a line of beads into the trough. On releasing the treadle, the hopper is raised by the spring D<2>, the. gate F is closed by its spring, and the comb G returns under the action of its spring and retains the beads in the trough. The hopper is continuously agitated by means of levers connected to the rods E<1> and acted on by cams. A wire P is passed, by means of leather-faced rolls K, K<1> geared together, through a split conical guide J through the line of beads in the trough. When it emerges, it is passed through a split curved guide-tube L, through straightening-rolls M and rolls K, K<1> on to another trough filled with beads in a similar manner, the wire being passed through a series of troughs and guides. At the end of the operation, the upper rolls K<1> and upper halves of the guides J, L and the combs C are raised, and the beaded wire removed. In the modification shown in Fig. 3, the hopper B discharges a line of beads into a trough C, which is reciprocated along a pivoted bar Q by means of links T<3>, T<2> engaging a cam-slot T<1> in a drum T, which also has another cam-slot for operating the rods that discharge the hopper. The wire P is held by grippers U, U<1> adapted to be opened alternately by cams on a cam-shaft S<2> driven from the main shaft S, which also drives the drum T. To thread the beads, the trough C is filled and moved along the bar Q; at the same time, the grippers U open and the beads are threaded on the wire. A pin C<2> on the trough C engages with a slotted guide R and passes over a tumbler lever R' so that, at the end of the motion of the trough, the pin C<2> engages under the tumbler R<1> and lowers the trough C and bar Q; at the same time, the grippers U close and the grippers U<1> open, and a pair of wiper fingers S<4> on a disk S<3> on the shaft S push the beads along the wire P. The grippers U then close, the trough is returned under the hopper, and the operation repeated. A comb may be provided for the trough, which is provided with a conical entrance C<4> and shoulders C<5> to assist the threading. Each end of a length of wire is connected to a bead-threading machine, and the wire falls over an inclined table A<1> forming an elongated U, the beads meeting in the middle.