US1906819A - Incandescent lamp and similar device - Google Patents

Incandescent lamp and similar device Download PDF

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Publication number
US1906819A
US1906819A US301583A US30158328A US1906819A US 1906819 A US1906819 A US 1906819A US 301583 A US301583 A US 301583A US 30158328 A US30158328 A US 30158328A US 1906819 A US1906819 A US 1906819A
Authority
US
United States
Prior art keywords
filament
lamp
stem
conductor
filaments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US301583A
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English (en)
Inventor
Severin Carl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US301583A priority Critical patent/US1906819A/en
Priority to FR680315D priority patent/FR680315A/fr
Priority to GB25715/29A priority patent/GB317833A/en
Application granted granted Critical
Publication of US1906819A publication Critical patent/US1906819A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated

Definitions

  • My invention relates to incandescent electric lamps and similar devices and more particularly to arrangements of filaments in multiple filament lamps and to the so-called mounts which comprise not only the filaments and their wire supports, but also the glass stem with which is usually incorporated an exhaust tube.
  • the current is supplied to the filament by leading-in wires, portions of which are sealed in the glass stem, the inner portion of the so-called leads being stiff enough to serve as supports as well as conductors.
  • the leads, especially at the sealed-in portlon are effectively insulated from each other which avoids short circuiting, and the arrangement is such that bending of the inner leads is avoided and, as a result, the press or sealed portion of the glass stem which is clamped around the leading-in conductors is practically not subjected to strain.
  • the filaments are supported in a very effective way from an illumination standpoint and also from the standpoint of ruggedness of construction. Further features and advantages of my invention will appear from the following description of a species thereof and from the accompanying drawings.
  • Fig. 1 is a fragmentary elevation on an enlarged scale of a lamp stem made according to my invention
  • Fig. 2 is a horizontal section along the line 2-2 of Fig. 1
  • Fig. 3 is a fragmentary elevation of a pair of stem clamping jaws
  • Fig. 4 is an enlarged plan view of'the clamping jaws
  • Fig. 5 is an elevation of a completed lamp comprising my invention
  • Fig. 6 is an elevation at right angles thereto
  • Fig. 7 is an elevation of a modification of the lamp shown in Fig. 5
  • Fig. 8 is a fragmentary perspective on an enlarged scale of the mount forming part of the lamp shown in Fig. 5;
  • Fig. 9 is a similar view of the mount forming art of the lamp shown in Fig. 7; Fig. 10 1s a bottom plan view of the lamp base; Fig. 11 is a wiring diagram of the lamp shown in Fig. 5; and Fig. 12 is an elevation of the lam its socket and associated reflector.
  • the lamp stem may be of the tipless type such as disclosed in the Mitchell and White Patent 1,423,956 issued July 25, 1922, and comprises a flare tube 10 and an exhaust tube 11.
  • the assembly is then carried by a series of fires which fuse the lower end of the stem thereby forming a solid mass of glass uniting the exhaust tube to the flare tube.
  • a pair of clamping jaws (Fig. 3) located in the path of travel of the stem assembly are adapted to then press the fused glass so as to seal the leadingin conductors at this portion.
  • the leading-in conductors are arranged in the flare tube so that in a horizontal section they appear as the four corners of a quadrilateral preferably approaching a square and are all substantially equally spaced from and parallel with the axis of the lamp stem as shown in Fig. 2.
  • the clamping jaws 13 and 14 By recessing the clamping jaws 13 and 14, as shown in Fig. 4, the fused glass may be ressed around the said leading-in conductors without disturbing their relative arrangement.
  • the aperture 15 which communicates with the exhaust tube 11 is definitely positioned by the method disclosed in the Phelps and Raus Patent 1,659,613, February 21, 1928, by means of a lug 16 extending from the jaw 14.
  • Figs. 5 to 9 inclusive two forms of multiple filament lamps made according to my invention, each of which comprise three separate filaments.
  • the lamp comprises the usual bulb 17, base 18 and my improved stem 19.
  • Filaments 20 and 21 are of high candle power and preferably of coiled tungsten wire.
  • the filament 20 is carried by two of the conductor supports 12 and 12 extending from the stem 19 while the filament 21 is carried by another of the said supports 12 and an auxiliary su port 21' which is electrically and mechanics y connected to the conductor support 12'.
  • These filaments are located on opposite sides of the ax1s of the lamp and equally spaced therefrom and lie in planes substantially parallel with each other.
  • the filament 22 is a low candle powered filament which gives a reduced lilght, such as used for parking purposes as istinguished from the driving li hts which are furnished by either of the ot er filaments.
  • the filament 22 is located in the rear of the filament but lies in substantially the same plane therewith. This novel mounting of the filament 22 is an important feature from a manufacturing as well as a quality standpoint. It is comparatively simple to mount and should it buckle or become detached from either of its supports during operation of the lamp, no serious damage wil result, due to its isolated position with reference to the other conductor supports.
  • the filament 22 is connected in series with the filament 20 making it inoperative upon the failure of the filament 20.
  • the form shown in Figs. 7 and 9 the filament 22 is mounted so as not to be dependent upon the condition of the filament 20 for its operation.
  • Three of the conductors 12 supply current to the various filaments and these are connected to the base contacts 23, 24, and 25 (Fig. 10), while the conductor indicated as 12' being the common return wire, is connected to the shell of the base 18. These conductors are substantially unidirectional and are substantially equally spaced throughout their extent.
  • Fi 11 the electrical connections for the form 0 lamp shown in Fi s. 5, 6 and 8 are shown diagrammatically. Iieading from the terminal of the battery 27 is conductor 28 connected to switch 29 around which are disposed the switch contacts 30, 31, 32, 33 and 34. A conductor 35 extends from contact 31 to one of the high candle power filaments 20 and from thence to ground 36 through the common conductor 12'. The conductor 37 extends from the contact 32 to the other high candle power filament 21 and back to ground 36 through the common conductor 12'. Conj ductor 38 extends from the contact 30 to the low candle power filament 22, which, as shown, is connected in series with the filament 20, the current being directed throu h the filament 20 back to ground by way of t e common conductor 12'.
  • Conductor 39 connects the contact 33 to the conductor 37 and the conductor 40 connects the contact 34 to the conductor 35.
  • the switch 29 enges contact 31, as shown, the filament 20 is i luminated; when it engages contact 32 the filament 21 is illuminated; when it engages contact 30 the parking filament 22 is illuminated; and when it is rotated so as to engage the contacts 33 and 34, both high candle power filaments 20 and 21 are illuminated in paral-
  • the driving filaments 20 an 21 have been placed as shown on op osite sides of the axis AA of the lamp ut in use with a parabolic reflector 41, such as shown in Fig.
  • the filament 21 be located along the principal axis and at the focus of the said reflector and the filaments 20 and 22 above it. This is accomplished by slightly oifsettin the lamp socket 42 from the axis B-B of t e reflector so that when the lamp is inserted therein the result is secured.
  • this arrangement of filaments with relation to the reflector may be automatically secured I rovide on the lamp base 18 three pins 43 (Fig. 10) unequally s aced from each other. These pins are cause to register with three slots (not shown) formed in the lamp socket. This arrangement prevents improper insertion of the lamp in its socket.
  • an electric incandescent lamp comprising a glass stem, a bulb and a base, the combination of a plurality of filaments mounted within said bulb and at least three leading-in conductors sealed in said stem and electrically connected to said filaments, said stem comprising a seal portion having lobes each surrounding a leading-in conductor, and an exhaust tube extending within said stem and integrally connected with said seal ortion, the latter having an aperture exten ing therefrom between a pair of said lobes and communicating with said exhaust tube.
  • an electric incandescent lamp or similar device comprising a glass stem, a bulb and a base, the combination of a pluralit of elements mounted within said bulb an at least three leading-in conductors sealed in said stem and electrically connected to said elements, said stem comprising a seal portion having lobes each surrounding a leadin -in conductor and an exhaust tube extend in within said stem and inte rally connecte with said seal portion, the latter having an aperture extending therefrom between a pair 0 said lobes and communicating with said exhaust tube.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US301583A 1928-08-23 1928-08-23 Incandescent lamp and similar device Expired - Lifetime US1906819A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US301583A US1906819A (en) 1928-08-23 1928-08-23 Incandescent lamp and similar device
FR680315D FR680315A (fr) 1928-08-23 1929-08-14 Perfectionnements aux lampes électriques à incandescence comportant des filaments multiples
GB25715/29A GB317833A (en) 1928-08-23 1929-08-23 Improvements in and relating to multiple filament incandescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US301583A US1906819A (en) 1928-08-23 1928-08-23 Incandescent lamp and similar device

Publications (1)

Publication Number Publication Date
US1906819A true US1906819A (en) 1933-05-02

Family

ID=23164005

Family Applications (1)

Application Number Title Priority Date Filing Date
US301583A Expired - Lifetime US1906819A (en) 1928-08-23 1928-08-23 Incandescent lamp and similar device

Country Status (3)

Country Link
US (1) US1906819A (fr)
FR (1) FR680315A (fr)
GB (1) GB317833A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283197A (en) * 1961-11-01 1966-11-01 Sylvania Electric Prod Electric lamp stem
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283197A (en) * 1961-11-01 1966-11-01 Sylvania Electric Prod Electric lamp stem
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb

Also Published As

Publication number Publication date
GB317833A (en) 1930-10-16
FR680315A (fr) 1930-04-28

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