US2082616A - Tubular electric incandescent lamp - Google Patents

Tubular electric incandescent lamp Download PDF

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Publication number
US2082616A
US2082616A US19238A US1923835A US2082616A US 2082616 A US2082616 A US 2082616A US 19238 A US19238 A US 19238A US 1923835 A US1923835 A US 1923835A US 2082616 A US2082616 A US 2082616A
Authority
US
United States
Prior art keywords
filaments
bulb
stays
filament
adjacent
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
US19238A
Other languages
English (en)
Inventor
Paul O Cartun
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
Priority to NL45054D priority Critical patent/NL45054C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US19238A priority patent/US2082616A/en
Priority to GB1327/36D priority patent/GB455586A/en
Priority to FR805737D priority patent/FR805737A/fr
Application granted granted Critical
Publication of US2082616A publication Critical patent/US2082616A/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
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/16—Joining of caps to vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp

Definitions

  • Patent No. 2,032,791 discloses a lamp consisting of an elongated tubular glass bulb having a metal disc sealed to each end thereof as an end -wall and terminal and a filament extending longitudinally substantially the entire-length of said bulb and electrically connected at each end to one of said metal discs.
  • the lamp according to the present invention is preferably somewhat similar in design. However, there are some cases in which it is desirable to provide a plurality of filaments in multiple rather than a single long filament; for example, where the lamp is extremely long, or where the lamp is used on low voltages, such as 30 volts. The several filaments may then be made of coarser or heavier wire than a single long filament operating on the same voltage.
  • the present invention deals with such a multiple filament lamp having a simple but sturdy supporting structure for the filaments.
  • One of the features of my invention is the use of a channel-shaped stay to provide rigidity, lightness and strength in the supporting structure for the filament. This feature is applicable to single filament lamps as well as multiple filament lamps.
  • Fig. 1 is a side view of a twofilament lamp comprising my invention
  • Figs. 2 and 3 are side and top views respectively of a modified two-filament lamp
  • Fig. 4 is a side view of a single filament lamp in which is incorporated my improved filament supporting structure.
  • the lamp comprises a tubular bulb Ill having terminal members consisting of metal discs I I, ll sealed to the ends thereof as end walls and contacts.
  • the particular discs shown are of the type disclosed in pending application Serial No. 3,334, Harold D. Blake, filed January 24, 1935, and have central annular recesses or depressions l2 therein which are engaged by suitable holders for mounting the lamp and conducting current thereto.
  • One of the discs H has an opening 13 at the center thereof through which the bulb I0 is exhausted, the said opening being sealed after exhaustion by a glass mass I 4.
  • a pair of filaments l5, l6 are located in the bulb Ill and extend longitudinally thereof in end to end relation substantially the entire length of said bulb.
  • the supporting and current conducting structure for said filaments comprises a pair of stays l1, l8, in this instance consisting of metal channels, extending longitudinally of the bulb ill co-extensively with the filaments l5, l6 respectively and adjacent the wall of the bulb.
  • the said channels ll, l8, as well as the discs I I, a are preferably made of an iron alloy containing about twenty-nine per cent of chromium, such as an alloy marketed by the Allegheny Steel Company as Allegheny 55 and described specifically in my patent application hereinbefore referred to.
  • the adjacent ends of said channels are sealed in an insulating bead l9, such as glass, located substantially at the center, longitudinally, of the bulb ill.
  • the filaments are supported at intermediate points by wires 26 each of which has an end embedded in an insulating head 21 sealed to the stay H or l8.
  • the circuits are therefore from left hand disc ll through wires 20, 22, filament l5, wire 24, stay 18, wire 2i, to right hand disc II, and from left hand disc ll through wire 20, stay l1, wire 25, filament l6, wires 23, 2
  • the contact discs i i are of a type shown in my patent application referred to hereinbefore and having outward protuberances 28 forming external shoulders adapted to be engaged by suitable holders.
  • the stays l8 in this case each consist of a length of wire having a loop at its remote end engaging the internal shoulder at the inside of each disc it formed by the protuberance 28.
  • the said stays l1, l8 extend longitudinally of the bulb l adjacent the wall to the middle thereof where the adjacent ends 29, 30 are bent in toward the axis of the bulb.
  • the filament I5 is secured at its remote end to the wire 22 and at its adjacent end to the bent end of stay i8.
  • the filament i6 is secured at its remote end to the wire 23 and at the other end to the bent end of stay ll.
  • the bent adjacent ends of the stays I'I, I8 are held in spaced relation by an insulating bead l9 sealed around portions thereof.
  • Fig. 4 shows a supporting structure for a single filament lamp incorporating a channel-shaped l5 stay 3
  • is secured to the wire 2
  • the opposite end of said stay is embedded in one end of a short glass rod or bead 32, an end of the wire 20 being embedded in the opposite end of said glass rod.
  • the rod or bead 32 is necessary to prevent a short-circuit between the discs ll. 25, extends substantially the entire length of the bulb I0 is supported at intermediate points by the support wires 26 which are in turn secured.
  • an incandescent lamp a tubular bulb, a pair of filaments extending longitudinally of said bulb in end to end relation, a metal terminal member secured to each end of said bulb, the
  • each of said filaments being electrically connected to the adjacent terminal member, a pair of conductive stays each longitudinally coextensive with one of said filaments, each of said stays being electrically connected at its remote end to the adjacent terminal member and each of 2.
  • a tubular bulb In an incandescent lamp, a tubular bulb, a
  • each of said filaments extending longitudinally of said bulb in end to end relation, a metal terminal member secured to each endvof said bulb, the remote end of each of said filaments being electri-
  • the filament 33 which cally connected to the adjacent terminal member, a pair of conductive stays each longitudinally coextensive with one of said filaments, insulating means for holding the adjacent ends of said stays in spaced relation, each of said stays being electrically connected at its remote end to the adjacent terminal member and each of the adjacent ends of said stays being electrically connected to the adjacent end of the filament which is coextensive with the other stay whereby said filaments are electrically connected in multiple between said terminals.
  • a tubular bulb a pair oi. filaments extending longitudinally of said bulb in end to end relation, a metal terminal member secured to each end of said bulb, the remote end of each of said filaments being electrically connected to the adjacent terminal member, a pair of conductive stays each longit 'dinally co-extensive with one of said filaments, ins ating means for holding the adjacent ends of said stays in spaced relation, each of said stays being electrically connected at its remote end to the adjacent terminal member and each of the adjacent ends of said stays being electrically connected to the adjacent end of the filament which is coextensive with the other stay whereby said filaments are electrically connected in multiple between said terminals and support wires engaging said filaments at intermediate points and secured to but insulated from said stays;
  • a tubular bulb a pair of filaments extending longitudinally of said bulb in end to end relation, a metal terminal member secured to each end of said bulb, the remote end of each of said filaments being electrically connected to the adjacent terminal member, a pair of channel-shaped metal stays each longitudinally co-extensive with one of said filaments.
  • insulating means for holding the adjacent ends of said stays in spaced relation, each of said stays being electrically connected at its remote end to the adjacent terminal member, and a conductor secured at one end to one of the adjacent ends of each of said stays and at the other end to the adjacent end of the filament which is co-extensive with the other stay whereby said filaments are electrically connected in multiple between said terminals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Resistance Heating (AREA)
US19238A 1935-05-01 1935-05-01 Tubular electric incandescent lamp Expired - Lifetime US2082616A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL45054D NL45054C (en(2012)) 1935-05-01
US19238A US2082616A (en) 1935-05-01 1935-05-01 Tubular electric incandescent lamp
GB1327/36D GB455586A (en) 1935-05-01 1936-04-30 Improvements in or relating to tubular electric incandescent lamps
FR805737D FR805737A (fr) 1935-05-01 1936-05-01 Lampe à incandescence tubulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19238A US2082616A (en) 1935-05-01 1935-05-01 Tubular electric incandescent lamp

Publications (1)

Publication Number Publication Date
US2082616A true US2082616A (en) 1937-06-01

Family

ID=21792164

Family Applications (1)

Application Number Title Priority Date Filing Date
US19238A Expired - Lifetime US2082616A (en) 1935-05-01 1935-05-01 Tubular electric incandescent lamp

Country Status (4)

Country Link
US (1) US2082616A (en(2012))
FR (1) FR805737A (en(2012))
GB (1) GB455586A (en(2012))
NL (1) NL45054C (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667594A (en) * 1951-01-02 1954-01-26 Gen Electric Electric incandescent lamp
US2712089A (en) * 1955-06-28 Electric incandescent lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712089A (en) * 1955-06-28 Electric incandescent lamp
US2667594A (en) * 1951-01-02 1954-01-26 Gen Electric Electric incandescent lamp

Also Published As

Publication number Publication date
GB455586A (en) 1936-10-23
NL45054C (en(2012))
FR805737A (fr) 1936-11-27

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