Patent GB-335839-A (GB)
Title: Improvements in the manufacture of electric incandescent lamps
IPC: F15B13/04
Filed: 1929-12-18
Abstract: 335,839. General Electric Co., Ltd., (Assignees of Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen). Dec. 29, 1928, [Convention date]. Addition to 283,890. Filaments, supports for; attaching.-The supportinserting and filamentmounting machine described in the parent Specification is modified by the provision of automatic means for conveying the spiral filaments to the leading-in wires carried by the pedestals mounted on an intermittently rotated table. The filaments are carried upon a sliding carrier 132, Fig. 4, provided with a series of transverse grooves 133 each containing a filament, a rack 140 being formed on the underside of the carrier to engage a pinion 138 which imparts to it an intermittent forward motion. Co-operating with the filament carrier is a suction head at the end of an arm 144, Fig. 1, which is pivoted on a spindle 143 and secured to a gear-wheel 156 engaged by a toothed sector 153, whereby the downward and upward movements of the latter member respectivly cause the arm 144 to swing into position to pick up a filament from a groove in the carrier 132 and carry it over to a pedestal which has been advanced into a position to receive it. The arm 144 of the suction head is provided at its free end with two lateral arms 146, Fig. 2, pivoted on short spindles 145 and attached by pins 148 to levers 149, which are provided with internal passages 151, Fig. 4, and at their free ends terminate in nozzles 150. A suction device (not shown) with positively controlled valves, is connected to the device to effect the lifting and releasing of a filament. The arms 146, 149, together with the pins 148 are adapted to be swung alternately towards and away from one another by means of intermeshing gear wheels on the spindles 145, one of the gear wheels being coupled by an intermediate wheel to a rack 164 at the end of a reciprocating rack bar 162 mounted on the underside of the arm 144, the arrangement being such that, at the instant of picking up a filament from the carrier, the arms 146 are side by side and the suction nozzles are above the ends of the filament, the swinging over of the arm 144 being accompanied by an inward swinging of the nozzles into the position shown in Fig. 2, the suction meanwhile being sustained so that the filament is bent into loop form. The reciprocating movement of the rack bar 162 is effected by a cam 167 on the spindle 143, in conjunction with a spring 165 connected between the rack bar and a rearward extension of the arm 144. At the end of the swinging movement of the arm 144 to the left, the ends 45', Fig. 7, of the looped filament 45, which protrude from the nozzles 150, enter into the open hooks 9<1> of the leading-in wires 9 of the pedestal which at that instant is in the clamping position of the support-inserting machine. The pedestal is depressed downwardly after entering the clamping position, and its central support 8 enters into the bore 195 of a guide 196 provided with conical outer surfaces 197 which support the leading-in wires 9 and simultaneously bend them to their correct angle. Subsequently two clamping-jaws 198 move inwardly to close the hooks 45<1> against the faces of the block 196, whereupon the suction of the nozzles is interrupted to enable the clamped filament to be removed therefrom.