US1722640A - Electric lamp - Google Patents

Description

July 30, 1929.. z. RID'DLE 1,722,640

ELECTRIC LAMP Filed oct. 27, 1924 2 sheets-sheet 1 4 Fifa? -5 gwuwnhw ZEL/E /P/DDL E.

lum mm1 Z. RIDDLE ELECTRIC LAMP 'July 3o, 1929.

2 Sheets-Sheet 2 Filed 001'.. 27, 192,4

31s uch i01- Patented July 30,- l92 9.

' UNITED sTATEs l 1,722,640 PATENT OFFICE.

zELIE NIDDLE, 'or sAN DIEGO, CALIFORNIA. AssIGNon or SIXTY PER. CENT 'ro DEAN.:

v xinx, or BELL, CALIFORNIA, AND 'rw OF SAN DIEGO, CALIFORNIA.

ELECTRIC LAMP.

ENTY- PER CENT T WAYNE IR. HANCOCK,

Application filed October 27, 1924. Serial o. 746,077.

My invention relates to a multi-filament electric lamp, and the objects of my invention are: First, to provide an electric lamp of this class which, when one of its illuminating filaments is burned out or otherwise broken, may be readily manipulated so as to bring another metallic illuminating filament into action; second, to provide an electric lamp 'having a plurality 0f independent filamentsenclosed in .an envelope and adapted to be independently connected to a. source of electrical energy, as desired; third, to provide a novel combined multifilament electric lamp and socket therefor;

fourth, to provide amulti-filament electric lamp for' lighting purposes having a plurality of circularly arranged contacts adapted to independently engage a contact means in the socket means therefor; fifth, to provide a lamp of this class having the life of two or more lamps, one which may be manufactured at a. cost of considerably less than a number of separate lamps aggregatingl an equal life, and one whereby all the illuminating filaments maybe removed, repaired or replaced, when repairing the lamp, during one opening of the enclosing bulb, thereby greatly reducing the expense in repairing electric illuminating lamps; sixth, to provide an electric lamp ofthis class which has substantially greater repairing value thanl the lamps now on )the market; seventh, to provide a novelly constructed multi-filament electric lamp; eighth, to rovide a novelly constructed socket means or a lamp of this class, and one which is ,adaptable for the conventional electric screw outlet, and ninth, to provide a lamp of this class .which is very simple pf construction, durable,eliicient and which will not readily deteriorate or get out vof order.

With these other objects inl view, as will appear hereinafter, myinvention consists of certain novel lfeatures of construction` combina'tion and arrangement of parts and portions, as will be hereinafter described in detail'a'nd particularly set forth inthe appended claim, reference being had to thel accompanying drawings and to the characters of reference thereon, which form a part of this application, in which: -v

Figure 1- is a side'elevational v'iew of my electric lamp, with a portion of the bulb broken away and in section to facilitate the illustration; Figs.'2, 3`,'4 and 5 are transverse sectional views thereof, taken respectively through 2 2, 3 3, 4 4 and 5 5 of Fig. 1; Fig. 6 is aview of the end of the filament supporting rod and the end filamentsupported thereon; Fig. 7 Ais a transverse sectional view of the lamp, taken through 7 7 of Fig. 1; Fig. 8 is a side elevational view of my socket means adapting my lamp to a conventional electric screw socket, showing a fragmentary portion of the lamp .secured in the socket portion thereof; Fig. 9 is a longitudinal sectional view of the socket means, with the section taken through the middle thereof,'showing certain parts and portions in elevation to facilitate the illustration; Fig. 10 is an end y,

view thereof; Figs. 11 and 12 are transverse sectional views thereof, taken respectively through 11 11 and 12 l2 of Fig. 9, and

Fig. 13- is a sectional view thereof, taken through 13 13 of Fig. 12. l

` Like characters of reference refer to similar parts and portions throughout the several views of the drawings. The bulb 1, filament supporting tube 2, lament'supporting rod 3, lead wires 4 and 5, illuminating filaments 6, filament supporting wires 7, lampsecuring base member 8, cement 9, insulating terminal sleeve supportingdisc 10, terminal sleeves 11 and' 12, solder beads 13, lead wire separating plug 14, socket casing member 15, thumbscrews 16, socket insulating member 17, annular screw plug member 18, screws 19, nut 20, spring contact member 21, contact plunger retaining member 22, screw l2,3, contact plunger 24, and the spring 25, constitute the principal parts and portions of my electric lamp structure.

The bulb 1 of my incandescent electric lamp is constructed similarly to the bulbsof ,p

glass. This rod 3 is provided at its end and intermediate its ends with a plurality of enlarged concentric portions or rosettes 3 around which and on which are supported the annularly arranged, coiled, illuminating metallic filaments 6. Although I have shown five separate and independent filaments positioned within the bulb 1, this number may be more or less, as long as no departure is made from the spirit of the invention. These filaments are supported on the enlarged portions or rosettes 3fL of the rod 3 by means of filament supporting wires 7, as inthe conventional construction.

In the tube 2 are positioned six lead wires, the one'indicated by 4 being connected to and adapted to supply energy to all of the filaments 6, and the other five lead wires, indicated by 5, being each connected with one of the filaments 6 at the ends opposite to those connected with the lead Wire 4. It will be here noted that the lead wires are preferably made of relatively small diameter or light Wire sections 4a and 5a within the tube 2 and relatively heavy and stiff' wire sections 4b and 5b of tungsten or'otlier suitable material outside of the tube 2 and directly connected to the filaments, the sections 4b and 51 being welded or otherwise secured to the sections 4SL and 5, respectively, within the glass portion at the end of the tube 2, substantially as shown. The outer ends of the stiff wire sections 4b and 5b of the lead wires 4 and 5, respectively, are `preferably anchored in the enlarged portions or rosettes 3a to which they extend. I

The neck portion 1a of the bulb 1 is provided at its end with a reduced portion 1b which is in turn provided at its end with a slightly enlarged annular portion 1.. Around the reduced portion 1b at the base end of the bulb 1 is positioned an annular metallic bulb supporting base member 8, which is secured relatively to the bulb 1 by means of an insulating cement or other suitable plastic material 9. At the outer end of the base member 8 is secured the lead wire sleeve supporting disc 10, preferably by crimping the outer edge of the member 8 inwardly, as shown best in Fig. 9. This disc 10 is made of fiber or other similar material. At the middle portion of this disc is secured a metallic sleeve 11 through which extends the common lead wire 4, which wire is secured relatively thereto by solder 13 at the outer end thereof, which solder forms a rounded or beadlike contact member. Arranged in circular order around the sleeve 11 and extending through the disc 10 are five other sleeves 12 through which the other fiveseparate lead wires extend, said last mentioned lead wires being also secured to the sleeves 12 by means of solder, as previously described. Thus a central common contact for all the filaments in the bulb and a plurality of annularly arranged'contacts for each of the filaments within the bulb are formed at the end of the lamp structure. At the normally outer end of the tube 2 is provided a plug 14 which spaces the lead wires 4 and 5 therein and from each other, and is also adapted to prevent the cement or other plastic material 9 from flowing into the tube 2. This plug may be made of asbestos wool or other similar material.

The socket means of my lamp structure consists of-a plug portion adapted to be secured in a conventional electrical outlet and a socket portion into which the plug portion of the lamp, formed by the base member 8, is secured. ,The socket portion of the socket means is formed from an annular metallic band or socket member 15 which is secured .at its one end, by means of inwardly depressed portions 15, to the one endet the insulating member 17 nade of porcelain or other suitable material. At the opposite end of the member 15 are provided a pair of oppositely disposed thumbscrews 16, which extend therethrough and are adapted 4to engage at their inner ends an annular groove portion 8a near the end of the base member 8 of the lamp nearest the bulb portion thereof, substantially as shown in Fig. 9. The `.pposite or outer end-of the insulating member 17 is slightly reduced` and around said reduced portion thereof is positioned the annular screw plug member 18 which is secured to the insulating member 17 by means of two screws 19 which extend inwardly from the outer end thereof to the inner end. At the inner end of the one screw 19 is provided a nut 20 and at the inner end of the other' screw 19 is'provided a spring contact member 21 having a nut portion 21l and a spring contact portion 211. At the inner end of the insulating member 17 and contiguous to the inner ends of the screws 19 are provided recesses 17a and 17'b in which respectively the nut 20 and the nut portion 21CL of the member 21, are positioned. The contact member 21 is accurately shaped and is positioned substantially concentrically with the aXis of the insulating member and extends outwardly from the inner face thereof, substantially as shown in Fig. 13, so as to permit the annularly arranged contacts of the lampstructure to engage the same.

Extending through the central portion of the insulating member 17 is a contact plunger retaining member 22 in the form ofu tube, which is secured in position relatively thereto by means of the contact screw 23 which is adapted to serve as one of the contacts for connecting the lamp toa source of electrical energy. At the inner end of the member 22 is reciprocally mounted a plunger 24, between which and the inner end of the screw 23 is positioned a compression spring 25, the one end of the plunger'24 extending from the inner end of the tube member 22 and adapted to engage the centrally positioned Contact at the end of the lamp structure.

lVhen one of the filaments in the bulb is burnt out or broken, the bulb is merely rotated a fifth of a revolution or any multiple thereof so as to connect any of the other annularly arranged contact members on the lamp with the spring Contact member 21 of this socket means.

It is obvious from this construction, as illustrated in the drawings and disclosed in the foregoing specification, that there is provided a multi-filament electric lamp structure and socket therefor, as aimed at and set forth in the objects of the invention, and though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular construction, combi'nation and arrangement, but desire to include in the scope of my invention the construction, combination and arrangement substantially as set forth in the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

In an incandescent electric lamp structure, a bulb, a filament support extending therein from one end thereof, a plurality of independent illuminating metallic filaments arranged around and supported by said support Within said bulb, a single lead Wire extending into said bulb from said one end and connected with each of said filaments, a

4plurality of separate lead Wires extending into said bulb from said one end, each one of said lead Wires being connected to a single filament, a plurality of circularly 'arranged contacts connected with said plurality of lead Wires only, another contact positioned at the central portion of said circularly ar ranged contacts and connected with said single lead Wire, an annular bulb supporting base' member secured around-said one end of said bulb and provided `With an annular groove in its periphery, and a plug socket means adapted to tit over the base member of said bulb and revolubly support the same, said socket means being provided with a pair of yieldable contacts, one adapted to engage said circularly arranged contacts of said bulb, one at a time, and the other of said yieldable contacts adapted, upon rotation, to engage the contact positioned at the central portion of said circularly arranged contacts, said yieldable contacts being adapted to make contact with said bulb.

In testimony whereof, I have hereunto set my hand at San Diego, California, this 20th day of October, 1924. l

ZELIE RIDDLE.A

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