Patent GB-715857-A (GB)
Title: Lamp basing machine
IPC: H01J9/30
Filed: 1952-06-04
Abstract: 715,857. Capping tubular electric lamps. SYLVANIA ELECTRIC PRODUCTS, Inc. June 4, 1952 [June 16, 1951], No. 14137/52. Class 39 (2) Bases or caps are secured simultaneously to both ends of an elongated tubular electric lamp by apparatus comprising a conveyer which is mounted upon a frame 28 and carries a series of spaced transverse bars 12 at intervals throughout its length, each bar having a basereceiving head 30 at each end and means whereby the head at one end can be displaced in the longitudinal direction of the bar to permit the insertion of a tubular lamp with its longitudinal axis arranged horizontally and with a base mounted loosely at each end, whereupon the lamps are moved with the bars to a succession of stations at least one of which is provided with heating means for curing or setting basing cement inserted within the bases prior to their being placed upon the ends of the tube. A pair of spaced endless chains 10 carry between them a plurality of head carrying bars 12, the chains being carried around sprocket wheels 14, 16, 18 and over tracks 24 supported by transverse angle-bars 26. A motor 20 drives the shaft of sprocket 14 continuously. The tubular lamps 32 each with a cap 84 loosely mounted on each end thereof, with the leading-in wires threaded through base pins 82, are fed to the apparatus from a horizontal conveyer 34 on which they are seated loosely in V-shaped heads 36, and drop in succession into basing heads 30 carried at the ends of head-carrying bars 12. Each basing-head 30 comprises a fixed jaw 46 mounted on a bracket 50 at one end of a head-carrying bar 12 and co-operating with a movable jaw 48 at one end of a lever 52 secured on a shaft 54 which is supported between the bracket 50 and a bearing 62. A tensioned spring 64 around the shaft 54 tends to close the pivoted jaw on the fixed jaw. The left-hand bracket 50 and bearing 62, Fig. 3, are secured upon that end of the bar 12, whereas the right-hand bracket 50 and bearing 62 are mounted on a slide 56 at their end of the bar 12 and normally drawn towards the opposite end by a tensioned spring 76. Outward movement of the slide 56 is, however, controlled by a bar cam 74 carried on a fixed support 75 and extending longitudinally in the direction of the chain 10 and adjacent to the loading station. At this station a roller 68 at the end of the lever 52 carrying the movable jaw 48 runs upon a fixed bar cam 66, causing the jaw to be opened, and at the same time a roller 72 at the end of a stud 70 extending downwardly from the slide 56 rides along the bar cam 74 and displaces the slide laterally, whereupon a lamp 32 is dropped into the heads 30 from the feeding conveyer 34. As the lamp 32 is carried upwardly the contours of the bar cams 74 and 66 are such that the slide 56 returns to the left and at the same time the movable jaw 48 snaps into the closed position. The lamp 32 with the bases 84 now held within the heads 30 is carried upwardly through or succession of heating stations where heat from burners 38 cures the basing cement disposed' within the bases 84. Subsequently the lamp is carried over the sprocket wheel 18 and down the other side of the machine frame to a discharge station where cam bars similar to those at the loading station effect the release of the lamp on to a track 42 and table 44.