US1651287A - Electric incandescent lamp made of glass tubing - Google Patents

Electric incandescent lamp made of glass tubing Download PDF

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Publication number
US1651287A
US1651287A US179684A US17968427A US1651287A US 1651287 A US1651287 A US 1651287A US 179684 A US179684 A US 179684A US 17968427 A US17968427 A US 17968427A US 1651287 A US1651287 A US 1651287A
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US
United States
Prior art keywords
filament
glass tubing
glass
incandescent lamp
lamp made
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
US179684A
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English (en)
Inventor
Mayer Hermann
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.)
Individual
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Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1651287A publication Critical patent/US1651287A/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
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp

Definitions

  • This invention relates to incandescent lamps made of straight or bent glass tubing and used for instance in the form of letters or any other signs.
  • the incandescent filament is either left entirely unsupported or is supported in a manner which is diflicult to carry out in practice. This has the drawback that the incandescent filament can easily come in. contact with the inner wall of the glass tube, whereby,
  • cooling points are roduced which more or less affect the per ect glowing of the filament.
  • the usual helically wound filament is surrounded along its entire length by a supporting wire which is similarly helically wound and to which 2 the filament is connected by means of filament supports.
  • the outer diameter of the helical supporting wire is such as to correspond to the inner diameter of the glass tube, so that when it is inserted therein, it
  • the filament supports are insulated from the supporting hehx in a known manner by means of glass
  • the invention is illustrated, b way of example, in the accompanying rawings, as applied to the letter P.
  • Fig. 1 shows a glass tube bent in a known manner into the form of the letter P. V
  • Fig. 2 shows, on an enlarged scale, the improved supporting helix together with the filament helix, filament supports and glass beads.
  • Fig. 3 is an elevation of the bent tube with the supporting helix and filament helix in position, whilst Fig. 4 illustrates certain details on an enlarged scale.
  • the supporting helix 2 surrounding the incandescent filament 1 abuts against the straight and bent parts of the inner wall of the glass tube and the incandescent helix '1 is supported by the filament supports 5 which are secured for this purpose to the supporting helix 2 by means of glass heads 3.
  • the supporting helix 2 is subdivided into parts insulated from one another by means of glass heads 4 in order thereby to provide a double insulation.
  • the filament helix supported in the manner above referred to is simply pulled through the straight or bent glass tube, for instance letter-shaped tubes, and the tube is then provided with electric leads, evacuated and sealed up.
  • An electric incandescent lamp made of glass tubing and comprising in combination with a helical incandescent filament, a helical support surrounding the helical incandescent filament and abutting with its outer surface against the inner wall of the glass tubing, filament supports for supporting the filament within the supporting helix centrally and means for insulating the said fila ment supports from the supporting helix.

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US179684A 1926-04-08 1927-03-30 Electric incandescent lamp made of glass tubing Expired - Lifetime US1651287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1651287X 1926-04-08

Publications (1)

Publication Number Publication Date
US1651287A true US1651287A (en) 1927-11-29

Family

ID=7738273

Family Applications (1)

Application Number Title Priority Date Filing Date
US179684A Expired - Lifetime US1651287A (en) 1926-04-08 1927-03-30 Electric incandescent lamp made of glass tubing

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US (1) US1651287A (xx)
BE (1) BE341268A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5021636A (en) * 1987-11-06 1991-06-04 U.S. Philips Corporation Electrical cooking unit and electrical cooking apparatus provided with this unit
US5105118A (en) * 1987-07-01 1992-04-14 Kabushiki Kaisha Toshiba Ring-shaped glass bulb and lamp assembly using the same
US20090015126A1 (en) * 2004-01-05 2009-01-15 Koninklijke Philips Electronic, N.V. Lamp with double filament

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5105118A (en) * 1987-07-01 1992-04-14 Kabushiki Kaisha Toshiba Ring-shaped glass bulb and lamp assembly using the same
US5021636A (en) * 1987-11-06 1991-06-04 U.S. Philips Corporation Electrical cooking unit and electrical cooking apparatus provided with this unit
US20090015126A1 (en) * 2004-01-05 2009-01-15 Koninklijke Philips Electronic, N.V. Lamp with double filament

Also Published As

Publication number Publication date
BE341268A (xx)

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