US2225090A - Mount construction for incandescent lamps - Google Patents

Description

Dec. 17, 1940.

C. WIENER MOUNT CONSTRUCTION FOR INCANDESCENT LAMPS Filed Dec. 30, 1938 INVENTOIR; c. zwzw /e 2 ATTORNEY E XII/70;

III/l Patented nee-(11,1940 f UNITED STATES PATENT OFFICE azzaoac 1 y lcoNs'l'hc ggTlng luglt lNANPES- Charles Wiener, Newark, N. 3.. anignor to Westinghouae Electric &-Manufacturing Company, -East Pittsburgh, Pa" a corporation of Pennsirlvania Application December 30,1938, Serial No. 243,419

5 Claims. (01. 136-38) My invention relates to incandescent lamps and especially to the mount construction for incandescent lamps. 1

An object "of the invention is to provide a 5 simpler andcheaper mount construction for incandescent lamps and'similar devices.

Another object of the invention is to eliminate the cumbersome press in incandescent lamps.

Other objects and advantages'of the invention will be apparent from the following description and drawing, in which: I Fig. 1 isa perspective view of a lamp embodying the invention.

Fig. 2 is a side elevation of a lead wire and beaded glass in the first stage of the assembly of the tube.

Fig. 3 is a front elevation of the two lead wires the tube, and associated apparatus, being illustrated mainly in cross-section. I

Fig. 5 is a view on lines V-V of Fig. 4.

i0 having a bulged out portion ll containing the filament l2 centrally therein. The glass container narrows down to a neck i3 sealed to the familiar screw-threaded base ll. As the first step in the formation of a tube according to my invention,I take lead-in wire I5 which has a copper clad portion ii of the familiar tube metal sold under the trade-name of Dume and an interior standard H. The interior end has a hook l3 formed thereon. A glass tube I9 is slipped over the Dumet" portion It on this leadin wire and also another tube 2i on asimilar wire 23. These two wires I5 and 23 are placed with the glass portions Hand 2| in contact and revolved in a flame 22which melts the glass of the two tubes and seals the-two wires II and 23 within the mass 23 formed from the two tubes l3 and 2|. The upper portion ll of the wire I! and also the upper portion 24 of wire 20 are put in a wardly.'

Various shapes are possible, but the one that I specially prefer is illustrated most' clearly in Figs. 1,4, and 5. The portion II at a short distance above the mass of glass 23 is bent outwardly at right angles for a short distance 25 and isthen shaped into an are 23 defining substantially the outer segment of a circle. The inner end 21 where it approaches the beginning of the segment is then bent upward for a por- In Fig. 1, the tube comprises a glass'container bending gig and bent outwardly and then uption 23- and then at an angle at 23 so that the upper hook I! is spaced at-the proper distance from the center line to secure the end of the filament i2 thereto.- Theupper portion 24 of lead-in wire 23 is bent in the opposite direction at 33 to forman are or segment of the circle 31 in the direction opposite to the axis of the arrangement to. that occupiedby the segment 26. From this segment 3|,a portion 32 extends directly upward and then is bent at 33 to suitably space the upper hook it at the other end of. the filament l2.

It will be noted that Fig. 5 discloses the two lead-in wires forming the periphery of substantially fifty per cent or more of a circle about the axis of the stem assembly.

A tube 34 preferably of brass is slipped around the exterior wires l5 and 20 up to the lower edge of the glass bead 23. This brass tube is substantially the diameter of the glass bead 23. A tubulation tubing 35 with an upper flare 33 extending outwardly to approximately the diameter formed by the segments 26 and 3| of the wires, is slipped over the brass tube with the flare 36 at the location of the bead 23. The stem, brass tube, and tubulation is then placed in the exhaust port 31 of a machine for sealing, exhausting, and filling with an inert gas. Specific details of this machine are described in the copending application of Lloyd D. Lockwood et al., filed February 26,.

1938, Serial No. 192,740, for Method and machine for exhausting and gas-filling hollow vessels.

The portion of this machine illustrated comprises a rubber tube connection 38 surrounding the glass tubulation 35 and adapted to be compressed there'on by a screw-threaded cap 33 acting through ball bearings ill and washer, 4|. A port 42 provides means for exhausting the tube when desired and another port 43 is provided for the insertion of any desired gaseous atmosphere, especially an inert gas such as argon or nitrogen. The tube 1 I is then placed over the stem with its neck I3 approximately engaging the arcs 26 and 3| of the conductors or standards for the filament. A sealing flame 44 is then applied to the neck of the glass tube to seal the neck onto the edge of 45 of the tubulation 36' and the excess 43 drops oft when the neck I3 is sealed to the flared portion 36 of the tubulation 35 as illussealed together.' The hot tipping torch is then removed and the presence 01' the metal tube di rectly underneath the glass tubulation causes a ring crack to develop around the end of the brass tube and the excess exhaust tubing and brass tube drops on as illustrated in Fig. 8 and leaves the formed tube with its two exterior wires l and 29. The base II can then be placed therein in the usual manner.

It will be noted that the lamp has been formed in a very simple manner and that the standards for the filament have a firm support against the neck or the bulb by means of the arcs 26 and 3| in contact therewith. The cumbersome press in said bulb portion, conductors for said filament extending through said next portion and being additionally supported in a transverse plane by the side wall of said neck.

2. A lamp comprising a container having a bulb portion and a neck portion, a filament in said bulb portion, two conductors having portions sealed through said bulb for said filament, said conductors having a portion intermediate the portion sealed through the bulb and the connection to the filament being curved into contact with the wall 01' said neck portion for additional support.

3. A lamp comprising a container having a base, a neck portion on said base, a bulb portion on said neck, conductors sealed through said base and having a portion contoured to the cross-sectional shape of the wall of the neck portion and adjacent thereto and an upper end portion in said bulb portion and a filament supported in said upper end portions of said conductors.

4. A lamp comprising a container 'having a' base, a circular neck portion and a bulb por-- tion, two conductors sealed through said base, each conductor being bent outwardly into an arc corresponding in curvature and plane with a transverse plane portion of the adjoining circular neck portion, said conductors then extending upwardly into said bulb portion and a filament between the ends of said conductors in said bulb portion.

5. A conductive support for a filament comprising two conductors having substantially parallel lower ends, an intermediate .portion having outwardly extending arcs substantially symmetrical, to each other, and transverse to the lower ends, said conductors having spaced upper ends.

CHARLES WIENER.

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