US3195001A - Tubular incandescent lamp - Google Patents

Tubular incandescent lamp Download PDF

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Publication number
US3195001A
US3195001A US96531A US9653161A US3195001A US 3195001 A US3195001 A US 3195001A US 96531 A US96531 A US 96531A US 9653161 A US9653161 A US 9653161A US 3195001 A US3195001 A US 3195001A
Authority
US
United States
Prior art keywords
envelope
filament
wall
coil
filament coil
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
US96531A
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English (en)
Inventor
William F Hodge
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 FR1317783D priority Critical patent/FR1317783A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US96531A priority patent/US3195001A/en
Priority to ES0274378A priority patent/ES274378A1/es
Application granted granted Critical
Publication of US3195001A publication Critical patent/US3195001A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

  • This invention relates generally to electric incandescent lamps, and more particularly to lamps comprising an elongated tubular envelope of vitreous material having a coiled filament wire extending axially thereof and supported in the envelope axis by a plurality of support members engageable with the inner envelope wall.
  • the support members are in the form of sheet metal wafers or discs disposed transversely of the filament coil and apertured at the center thereof to engage and support the filament coil between adjacent turns of the coil.
  • the construction is such that the wafers are securely fastened to the filament coil.
  • the construction is such that rotation of the wafer relative to the filament coil is not effectively prevented. It has been found that in the latter cases vibration of the lamps in shipment or in certain applications can cause rotation of the wafers and resultant advancement or screwing action of the water along the filament coil to an excessive degree such that the spacing between successive discs may become unduly enlarged. The unsupported span of filament coil then becomes so great that the coil, when heated to incandescence, may sag against the envelope wall.
  • means are provided for locking the wafers against rotation relative to the inner wall of the envelope. Since the filament coil is mounted so that it is not rotatable about its axis relative to the envelope, the wafers are thereby also looked against rotation relative to the filament coil.
  • FIG. 1 is an elevation of an electric incandescent lamp embodying the invention
  • FIG. 2 and FIG. 3 are fragmentary elevations showing portions of different filament coil forms and an associated supporting wafer or disc;
  • FIG. 4 is a transverse section of the lamp along the line 4-4 in FIG. 1 showing one form of structure for preventing rotation of the supporting wafers relative to the envelope wall;
  • FIG. 5 is a view similar to FIG. 4 of another species of structure for preventing rotation of the supporting wafer.
  • the lamp illustrated therein by way of example may be of the infrared or heat lamp type disclosed and claimed in Patent 2,864,025, Foote et al.
  • a lamp comprises a sealed gas-filled tubular envelope 1 of essentially circular cross-section and of vitreous material such as quartz.
  • a helically coiled tungsten wire filament 2 extends axially of the envelope 1 and is connected at its end to lead-in conductors 3 which extend outwardly through, and are hermetically sealed in, press or pinch seal portions 5 at the ends of the envelope.
  • the filament coil 2 is supported and maintained in the axis of the envelope 1 by a series of spaced support members 6.
  • a preferred form of support member 6 is a sheet metal wafer or disc of the type disclosed and claimed in Patent 2,813,993, Fridrich, and formed and attached to the filament coil by the method and apparatus disclosed and claimed in Patent 2,813,327, Fridrich.
  • Each said ice disc 6 is disposed between adjacent turns of the filament coil 2 (FIG. 2) and is provided with a central aperture 7 (FIG. 4) and a radial slit 8 extending therefrom to the periphery of the disc.
  • a portion of the wire in the ad jacent turns of the coil 2 extends through the portion of the slit 8 adjacent to the aperture 7, and a collar portion 9 (FIG.
  • the collar 9 is formed by a piercing tool inserted through the interior of the filament coil 2 so that it is of a furcated character comprising a plurality of tongues or tabe's 10 which are ordinarily caused to curl about andfirmly grip the inner side of the adjacent turn of the filament coil 2.
  • a piercing tool inserted through the interior of the filament coil 2 so that it is of a furcated character comprising a plurality of tongues or tabe's 10 which are ordinarily caused to curl about andfirmly grip the inner side of the adjacent turn of the filament coil 2.
  • the attachment of the .disc 6 to the coil is not sufficiently secure to avoid rotation of the disc relative to the coil when subjected to vibration.
  • the disc 6 moves along the coil 2 by a screw action; it may move a distance as great'as the original spacing between discs, or even greater if more than one disc moves. In such cases the unsupported span of the filament coil 2 is so great that it may sag against the wall of the envelope 1 when the coil is heated to incandescence during operation of the lamp.
  • one end of the envelope is sealed at the pinch portion 5, after which the filament 2 is stretched to place it in tension by pulling on the lead-in conductor 3 at the other end. It is during such stretching of the filament that the grip of the collar portion of one or more of the discs 6 on one of the coil turns 2:: or 2b may become loosened.
  • the inner wall of the envelope 1 is provided with a small rib-like key 11 extending longitudinally the full length of the envelope, and each of the discs 6 is provided with a matching notch 12 at its periphery engaging said key 11.
  • the locking or keying function is provided by a segmented flat surface 13 interrupting the circular contour of the inner wall of the envelope 1' and extending the full length of the envelope.
  • Each of the discs 6' is provided with a corresponding straight chord-shaped peripheral portion 14 which engages the fiat surface 13 of the envelope to prevent rotation of the disc relative to the envelope.
  • the locking ridge 11 or flat 13- is readily formed during the operation of drawing the quartz tubing 1, and in both cases the wafers .or discs 6 and 6' are effectively locked against rotation relative to the envelope and relative to the filament coil 2 or 2'.
  • the radial slit 8 terminates in a V-shaped notch 17 at the periphery of the disc.
  • the said notch 17 may be employed as the locking element on the disc en gageable with the key 11.
  • an electric incandescent lamp comprising a tubular envelope of essentially circular cross-section, a helically coiled wire filament extending axially of said envelope, and a plurality of supporting circular Wafer members disposed transversely of and at spaced intervals along said filament and engageable at their peripheries with the inner wall of said envelope, said wafer members being centrally apertured and engaging the filament coil between adjacent turns thereof to support it in the axis of said envelope but being rotatable with respect to said filament coil, said envelope having an integral portion of its inner wall deformed from the circular cross section in an angularly localized zone extending uniformly the length of the envelope, and said water members having at their peripheries angularly localized zones deformed from the circular in matching conformance to the said localized zone of the envelope inner wall whereby to hold said wafers against rotation relative to the inner envelope wall.
  • a lamp as set forth in claim 1 wherein the said means locking said wafer members against rotation relative to the inner Wall .of said envelope comprises a longitudinally extending rib-like key on the inner envelope wall and a notch in each said wafer fitting around said key.
  • a lamp as set forth in claim 1 wherein the said means locking said wafer members against rotation relative to the inner wall of said envelope comprises a segment-shaped flat surface interrupting the circular crossseetion of the inner envelope wall and extending longitudinally of the envelope, and a corresponding chordshaped peripheral portion of each said water engaging v said flat surface of the inner envelope wall.

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  • Resistance Heating (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US96531A 1961-03-17 1961-03-17 Tubular incandescent lamp Expired - Lifetime US3195001A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1317783D FR1317783A (ko) 1961-03-17
US96531A US3195001A (en) 1961-03-17 1961-03-17 Tubular incandescent lamp
ES0274378A ES274378A1 (es) 1961-03-17 1962-02-07 Mejoras introducidas en las lamparas electricas incandescentes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96531A US3195001A (en) 1961-03-17 1961-03-17 Tubular incandescent lamp

Publications (1)

Publication Number Publication Date
US3195001A true US3195001A (en) 1965-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US96531A Expired - Lifetime US3195001A (en) 1961-03-17 1961-03-17 Tubular incandescent lamp

Country Status (3)

Country Link
US (1) US3195001A (ko)
ES (1) ES274378A1 (ko)
FR (1) FR1317783A (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930178A (en) * 1973-07-10 1975-12-30 Thorn Electrical Ind Ltd Electrical incandescent filament devices
US5146134A (en) * 1990-03-15 1992-09-08 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture
US11462396B2 (en) * 2013-09-05 2022-10-04 Applied Materials, Inc. Lamp cross-section for reduced coil heating

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813993A (en) * 1954-09-17 1957-11-19 Gen Electric Electric lamp or similar device
US2910605A (en) * 1958-06-23 1959-10-27 Gen Electric Radiant energy device
US2943227A (en) * 1956-07-06 1960-06-28 Itt Electron gun support
US2980820A (en) * 1959-12-24 1961-04-18 Westinghouse Electric Corp Filament support for an electric lamp or similar device
US3039015A (en) * 1958-09-04 1962-06-12 Gen Electric Co Ltd Devices for producing light or infra-red radiation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813993A (en) * 1954-09-17 1957-11-19 Gen Electric Electric lamp or similar device
US2943227A (en) * 1956-07-06 1960-06-28 Itt Electron gun support
US2910605A (en) * 1958-06-23 1959-10-27 Gen Electric Radiant energy device
US3039015A (en) * 1958-09-04 1962-06-12 Gen Electric Co Ltd Devices for producing light or infra-red radiation
US2980820A (en) * 1959-12-24 1961-04-18 Westinghouse Electric Corp Filament support for an electric lamp or similar device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930178A (en) * 1973-07-10 1975-12-30 Thorn Electrical Ind Ltd Electrical incandescent filament devices
US5146134A (en) * 1990-03-15 1992-09-08 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture
US11462396B2 (en) * 2013-09-05 2022-10-04 Applied Materials, Inc. Lamp cross-section for reduced coil heating

Also Published As

Publication number Publication date
ES274378A1 (es) 1962-06-16
FR1317783A (ko) 1963-05-08

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