US1722176A - Incandescent lamp - Google Patents

Incandescent lamp Download PDF

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Publication number
US1722176A
US1722176A US108635A US10863526A US1722176A US 1722176 A US1722176 A US 1722176A US 108635 A US108635 A US 108635A US 10863526 A US10863526 A US 10863526A US 1722176 A US1722176 A US 1722176A
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US
United States
Prior art keywords
filament
lamp
plane
incandescent lamp
stem
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
US108635A
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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US108635A priority Critical patent/US1722176A/en
Priority to FR634102D priority patent/FR634102A/en
Application granted granted Critical
Publication of US1722176A publication Critical patent/US1722176A/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

Definitions

  • My invention relates to incandescent electric lamps, and more particularly to lamps for projection or signal purposes. Still more particularly my invention relates to incandescent lamps suitable for railway signaling.
  • the object of my invention is to produce a lamp having a greater concentration than heretofore of the filament, and consequently easier focusing of the lamp.
  • a further object of my invention is to reduce the number of filament supports and thus to reduce the heat losses.
  • a still further object of my invention is to provide a constructiony which may be readily assembled and thus to reduce the cost of production. Further features and advantages of my invention will appear from the following description of a species thereof.
  • FIG. 1 is an elevation of a lamp comprising my invention
  • Fig. 2 is an elevation at rightangles to that of Fig. 1
  • Fig. 3 is a perspective view of the filament mount
  • Fig. 4 is a diagrammatic view in elevation showing the combination of the lamp filament with a lens usedl in signal lamps;
  • Fig. 5 is a similar view in plan. In Figs. 4
  • the filament 10 is of the concentrated coiled type and is ordinarily composed of tungsten.
  • the fila ment extends from the end of the leading-in conductor 17, which is sealed in the glass stem 12 in the usual manner,- to a loop 13 of a support wire 14 which is embedded in the stem.
  • the filament then passes over to the loop 15 vof a similar support wire 16 and then back to the end of the other leading-in conductor 11.
  • the embedded ends of the supports 14 and 16 are practically in line with those .of the leading-in conductors-11 and 17 but these supports extend obliquely in opposite directions from the plane of the clamped or sealed portion of the stem so that at their looped ends they are separated sufficiently to carry the desired length of filament.
  • these supports extend obliquely in opposite directions from the plane of the clamped or sealed portion of the stem so that at their looped ends they are separated sufficiently to carry the desired length of filament.
  • a stem having a flat sealed portion, a pair ofleading-in conductors em- 80 bedded in said portion and extending upwardly therefrom, a pair of support wires having their lower ends embedded in said sealed portion and extendingupwardly and in opposite directions from the plane thereof, the line connecting their upperv ends being in a plane substantially perpendicular to the said .sealed portion and located substantially Vhalf-way between the embedded-ends of said support wire,

Description

Patented July 23,l 192.9.
UN1TED STATES PATENT oFrlcE.`
y PAUL O. CART'UN, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW INCAN DESCENT LAMP.
Application filed May 12,
My invention relates to incandescent electric lamps, and more particularly to lamps for projection or signal purposes. Still more particularly my invention relates to incandescent lamps suitable for railway signaling. The object of my invention is to produce a lamp having a greater concentration than heretofore of the filament, and consequently easier focusing of the lamp. A further object of my invention is to reduce the number of filament supports and thus to reduce the heat losses. A still further object of my invention is to provide a constructiony which may be readily assembled and thus to reduce the cost of production. Further features and advantages of my invention will appear from the following description of a species thereof.
' In the drawing Fig. 1 is an elevation of a lamp comprising my invention; Fig. 2 is an elevation at rightangles to that of Fig. 1; Fig. 3 is a perspective view of the filament mount; Fig. 4 is a diagrammatic view in elevation showing the combination of the lamp filament with a lens usedl in signal lamps; and
Fig. 5 is a similar view in plan. In Figs. 4
and 5 the filament is shown enlarged.
As shownin Figs. 1, 2, and 3,'the filament 10 is of the concentrated coiled type and is ordinarily composed of tungsten. The fila ment extends from the end of the leading-in conductor 17, which is sealed in the glass stem 12 in the usual manner,- to a loop 13 of a support wire 14 which is embedded in the stem. The filament then passes over to the loop 15 vof a similar support wire 16 and then back to the end of the other leading-in conductor 11. The embedded ends of the supports 14 and 16 are practically in line with those .of the leading-in conductors-11 and 17 but these supports extend obliquely in opposite directions from the plane of the clamped or sealed portion of the stem so that at their looped ends they are separated sufficiently to carry the desired length of filament. On the other hand,
these supports A14 and 16 converge toward a pla-ne at right angles to that of the clamped or sealed portion of the stem and disposed 192s. serial no. 108,635.
half-way between their embedded ends. The result is that the looped ends of said supports are in the said plane, and the portion of the filament whichextends therebetween is in the direction of a line in said plane and substantially perpendicular to the plane of the clamped orsealed stem portion.' In Fig. 4 the filament andaI portion of the leading-in wires are shown on an enlarged scale in combination with aA Fresnel lens used in signal lamps. This view of the filament and supports corresponds to that of Fig. 1.- In Fig. 5 is shown the same combination irl-plan.' lIt will be apparent from an inspection of these figures that the filament isdisposed symmetrically with reference to the center plane of the clamped or sealed portion and also symmetrically with reference to the plane which is perpendicular to and bisects the clamped or sealed portion. The result is that no matter how the lamp is turned,'substantially the same amount of filament is exposed and the same amount of candle-power obtained. It will be apparent also that such a lamp should be comparatively easy to focus. These results are obtained with only two extra support wires and without additional glass elements. f
What I claim as new and desire to secure by Letters Patent of the United States, is
In an electric incandescent lamp, the combination of a stem having a flat sealed portion, a pair ofleading-in conductors em- 80 bedded in said portion and extending upwardly therefrom, a pair of support wires having their lower ends embedded in said sealed portion and extendingupwardly and in opposite directions from the plane thereof, the line connecting their upperv ends being in a plane substantially perpendicular to the said .sealed portion and located substantially Vhalf-way between the embedded-ends of said support wire,
and a single filamentsupported at' the ends of 00 said leading-in conductors and support wires.
In witness whereof, I have hereunto set my hand this 10th day of May i926.
- PAUL O. CARTUN.
US108635A 1926-05-12 1926-05-12 Incandescent lamp Expired - Lifetime US1722176A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US108635A US1722176A (en) 1926-05-12 1926-05-12 Incandescent lamp
FR634102D FR634102A (en) 1926-05-12 1927-05-10 Incandescent lamp improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US108635A US1722176A (en) 1926-05-12 1926-05-12 Incandescent lamp

Publications (1)

Publication Number Publication Date
US1722176A true US1722176A (en) 1929-07-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US108635A Expired - Lifetime US1722176A (en) 1926-05-12 1926-05-12 Incandescent lamp

Country Status (2)

Country Link
US (1) US1722176A (en)
FR (1) FR634102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924736A (en) * 1956-06-27 1960-02-09 Gen Electric Electric lamp and method of manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924736A (en) * 1956-06-27 1960-02-09 Gen Electric Electric lamp and method of manufacture

Also Published As

Publication number Publication date
FR634102A (en) 1928-02-09

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