Patent GB-381031-A (GB)
Title: Improvements in and relating to machines for making incandescent electric lamps and the like
IPC: H01J5/62
Filed: 1931-12-23
Abstract: 381,031. Soldering leading-in wires to electric lamps &c. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Rippl, F. J. ; 16002, Neladale Avenue, East Cleveland, U.S.A.) Dec. 23, 1931, No. 35595. Convention date, Dec. 27, 1930. [Classes 83 (ii) and 83 (iv).] In soldering leading-in wires to the bases of electric incandescent lamps or the like, a piece of solder is firmly held at the junction of the end of the wire and the base during soldering. In soldering the lead to the shell 12, solder wire 10 is fed from a spool by pivoted grippers 22, 23 on a slotted member 19, through a collar 25 engaging a lever 36, which is retracted by a spring 41, and moved forwards by a slotted rod 43 engaged by a pin 42 on a lever 44. Pivoted spring-pressed fingers prevent backward motion of the wire. The wire is fed through a die 21 into an aperture 48 in a slide 46 reciprocated by a lever 55 and rod 54. Lowering of the slide 46 severs a pellet from the wire and brings it opposite a pointed rod 51, the pellet being retained by a spring-pressed rod 59. The pointed end of the rod 51 spears the pellet, withdraws it from the aperture, and forces it against the shell 12 after the slide 46 has moved up, where it is held during soldering by the burner 13. The rod 51 is spring-pressed in a sleeve on a member 63 operated through flanges 62 by the pin 42, the slot in the rod 43 allowing a short stroke of the rod 51 in withdrawing it from the aperture 48. The member 63 carries a flame deflector 67 through a slot 69 in which the flame projects during soldering. A scraper 71 is provided to remove unused solder from the rod 51. The apparatus may be adjusted about the axis 45 by a screw 70. In soldering the lead in an aperture in the top of the base, the solder wire 10<1> is fed in the manner above described by a lever 78, link 82, and slotted levers 81, 85 adjustable by a link 84, through felt oiled from a cup 75 into an aperture in a die 88 situated above a perforated disc 90 containing inserts 89. The disc is rotated step by step in stages of 90‹ by a ratchet and pawl from a bar 93 connected by a link 94 to the lever 85. During the first movement a pellet is cut off and brought between a plunger 102 and a die 101, which are operated by levers 103, 106, links 110, 111, and lever 107 from a rod 108 to form a solder rivet. The rivet is stripped from the die 101 by a plunger 113 engaging a fixed pin 114. After feeding two further steps the solder rivet is brought opposite a nozzle 118 mounted on a lever 116, which is pivoted on a slide 146 connected by freelymovable rods 149, 150 and springs 151, 152 to a slide 137 operated through a link 138 from a lever 132. Stop-nuts 154, 155 on the rod 149 alternately engage a fixed projection 156. When stop 154 is engaged to stop the slide 146, further movement of the lever 132 to the right causes a cam 135 carried by the slide 137 to actuate the lever 116 so as to lower the nozzle on to the rivet. The nozzle, which is slidable in the lever 116 and is normally held down therein by a spring-pressed lever 119, is connected by passages 127, 124 and flexible hose with the port 125 of an automatic valve, which at this stage connects the nozzle to a suction apparatus through port 130. On moving the lever 132 to the left the slide 137 is moved by spring 152 until a recess in the cam engages a roller 136 on the lever 116, whereupon the nozzle is raised by a spring 139. At this stage the rivet is held by suction in the nozzle, being assisted therein by a plunger 141 operated by a lever 143 connected to lever 103. The slides 137, 146 then move to place the nozzle over the lamp. When the stop 155 engages projection 156, the nozzle is lowered by the cam 135 and a pin in the slide 137 operates the piston of the valve to close the vacuum and open the nozzle to compressed air from port 160. The solder rivet is thus blown into the aperture in the base and soldering effected by burners without materially changing the shape of the rivet. The nozzle end of the lever 116 is provided with an opening for the circulation of air for cooling purposes.