US3870920A - Electric incandescent lamp - Google Patents

Electric incandescent lamp Download PDF

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Publication number
US3870920A
US3870920A US390169A US39016973A US3870920A US 3870920 A US3870920 A US 3870920A US 390169 A US390169 A US 390169A US 39016973 A US39016973 A US 39016973A US 3870920 A US3870920 A US 3870920A
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US
United States
Prior art keywords
transverse support
longitudinal
support
incandescent lamp
coil spring
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
US390169A
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English (en)
Inventor
Fraeye Dirk Jules Remi De
Jan Alfons Catharina Mewissen
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3870920A publication Critical patent/US3870920A/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

Definitions

  • Trifuri The invention relates to an electric incandescent lamp comprising a planar filament which is stretched in a frame construction of which a transverse support forms part which is resiliently movable relative to the longitudinal supports of the frame construction by means of two helical springs.
  • the filament is stretched between the two transverse supports or, when .only one transverse support is present, between said transverse support and an oppositely located part of the wall of the envelope of the incandescent lamp.
  • the connection of the transverse support or transverse supports to the longitudinal supports is a rigid connection.
  • the electric incandescent lamp according to the invention is characterized in that the piece of wire is formed as a helical spring which is locked with its one end in the aperture present in the transverse support and is secured with its other end to the longitudinal support.
  • each longitudinal support is threaded through the helical spring and the aperture in the transverse support after which the abovementioned other end of the helical spring is secured to the longitudinal support, for example, by a spot welding operation.
  • connection of the helical spring to the transverse support is preferably carried out by embedding the helical spring in the material of the transverse support. This is particularly advantageous because due to the presence of the helical spring during the manufacture of the transverse support an aperture is formed in the material having the dimension required for receiving the longitudinal support.
  • a favourable embodiment of the electric incandescent lamp according to the invention is characterized in that a cylindrical body is embedded in each of the apertures in the transverse support, the diameter of said body being larger than the diameter of the helical spring secured in said body by means of a screwing operation.
  • the walls of the aperture in the transverse support are formed by the cylindrical body.
  • the transverse support is preferably formed from two beams of quartz glass which are softened and are then pressed against each other with their largest longitudinal dimension which clamping inbetween them the cylindrical bodies.
  • FIG. 1 shows an embodiment of an electric incandescent lamp according to the invention
  • FIG. 2 is a cross-sectional view on an enlarged scale of the connections of the transverse support to the longitudinalsupport of the incandescent lamp taken on the linelI-II of FIG. 1 and
  • FIG. 3 shows another embodiment of the connection of a transverse support to a longitudinal support.
  • the electric incandescent lamp which is shown in FIG. 1 and is destined for projection purposes comprises a lamp envelope 1 of a transparent material, for example quartz glass, from which two leadthrough conductors 2 and 3 project.
  • a frame construction which is formed by two longitudinal supports 4 and 5 and two transverse supports 6 and 7 is arranged inside the lamp envelope 1.
  • the longitudinal supports 4 and 5 which are formed from a refractory metal such as tungsten are connected to the lead-through conductors 2 and 3, respectively.
  • the transverse supports 6 and 7 which are formed from quartz glass each comprise a number of hooks 8 which support the filament 9.
  • the filament which is constructed from six parallel extending segments is welded to the longitudinal supports 4 and 5, respectively, with its ends 10 and 11, respectively.
  • the transverse support 7 in this embodiment comprises two recesses in which the longitudinal supports 4 and 5 are rigidly clamped.
  • connection of said transverse supports to the longitudinal supports may also be carried out differently, for example, while using a piece of wire.
  • the helical springs 12 and 13, respectively are used for the connection of the transverse supports 6 to the longitudinal supports 4 and 5, the helical springs 12 and 13, respectively.
  • the ends 14 and 15, respectively, of said helical springs 12 and 13, respectively, are connected to the longitudinal supports 4 and 5, respectively, by a spot-welding operation.
  • the oppositely located ends 16 and'l7, respectively, of the helical springs are locked in the transverse support 6 in a manner which will be explained in greater detail with reference to FIG. 2;
  • the transverse support 6 is formed from two beams 18 and 19 of quartz glass which, after softening the quartz glass by heating, are pressed against each other with their largest longitudinal dimension while clamping inbetween them both the hooks 8 and two cylindrical members 20.
  • the members 20 each consist of a helically wound piece of wire in which the ends 16 and 17 of the helical springs are screwed.
  • the pieces of wire are embedded as it were in the quartzglass while a cylindrical aperture is formed.
  • the pieces of wire 20 have such a length that the transverse support 6 cannot tilt.
  • one end 23 of the spring is directly embedded in the material of the transverse support 22.
  • the inner diameter of the helical spring should be chosen to be so wide that the longitudinal support can move axially relative to the transverse support and that in such manner that the transverse support 6 is moved in the direction away from the transverse support 7 when the filament 9 expands.
  • the helical springs 12 and 13 are formed as compression springs. It will be obvious, that the helical springs, when arranged on the side of the transverse support remote from the filament, should be constructed as expansion springs. In that case, the longitudinal conductors should of course extend over a certain distance beyond the relevant transverse support.
  • one side of the frame construction is formed by the transverse support 7. Of 5 and a coil spring fixed to said longitudinal support and disposed in coaxial relationship with at least an axial portion thereof engaging at least an axial portion of said coil spring in interspersed relation to prevent axial movement therebetween.
  • each of said coil springs extends axially between a first point fixed to said longitudinal support and said axial portion of said coil spring which engages said helix.
  • transverse support comprises a glass member extending transverse to the axis of said helix and fused circumferentially to at least one axial section of said helix.

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  • Resistance Heating (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US390169A 1972-09-13 1973-08-20 Electric incandescent lamp Expired - Lifetime US3870920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7212381A NL7212381A (fr) 1972-09-13 1972-09-13

Publications (1)

Publication Number Publication Date
US3870920A true US3870920A (en) 1975-03-11

Family

ID=19816924

Family Applications (1)

Application Number Title Priority Date Filing Date
US390169A Expired - Lifetime US3870920A (en) 1972-09-13 1973-08-20 Electric incandescent lamp

Country Status (8)

Country Link
US (1) US3870920A (fr)
JP (1) JPS4965081A (fr)
BE (1) BE804737A (fr)
CA (1) CA997822A (fr)
DE (1) DE2342740A1 (fr)
FR (1) FR2199195B3 (fr)
GB (1) GB1370088A (fr)
NL (1) NL7212381A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4622487A (en) * 1985-01-09 1986-11-11 Gte Products Corporation Electric lamp with stress relieving means
US4658180A (en) * 1984-02-14 1987-04-14 U.S. Philips Corporation Flament support for a projection lamp
US5680009A (en) * 1995-06-29 1997-10-21 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Method of making an electric incandescent lamp, and electric lamp made in accordance with the method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1583463A (en) * 1920-07-13 1926-05-04 Western Electric Co Electron-discharge device
US1613630A (en) * 1919-11-25 1927-01-11 Western Electric Co Vacuum tube
US3440473A (en) * 1966-12-14 1969-04-22 Sylvania Electric Prod Lamp filament joint for incandescent lamps
US3530329A (en) * 1968-06-25 1970-09-22 Gen Electric Filament support and heat shield construction for electric lamps
US3543962A (en) * 1968-12-13 1970-12-01 Sylvania Electric Prod High wattage quartz halogen lamp
US3567988A (en) * 1967-09-01 1971-03-02 Machlett Lab Inc Filament support structure having vibration suppressing means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1613630A (en) * 1919-11-25 1927-01-11 Western Electric Co Vacuum tube
US1583463A (en) * 1920-07-13 1926-05-04 Western Electric Co Electron-discharge device
US3440473A (en) * 1966-12-14 1969-04-22 Sylvania Electric Prod Lamp filament joint for incandescent lamps
US3567988A (en) * 1967-09-01 1971-03-02 Machlett Lab Inc Filament support structure having vibration suppressing means
US3530329A (en) * 1968-06-25 1970-09-22 Gen Electric Filament support and heat shield construction for electric lamps
US3543962A (en) * 1968-12-13 1970-12-01 Sylvania Electric Prod High wattage quartz halogen lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658180A (en) * 1984-02-14 1987-04-14 U.S. Philips Corporation Flament support for a projection lamp
US4622487A (en) * 1985-01-09 1986-11-11 Gte Products Corporation Electric lamp with stress relieving means
US5680009A (en) * 1995-06-29 1997-10-21 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Method of making an electric incandescent lamp, and electric lamp made in accordance with the method

Also Published As

Publication number Publication date
FR2199195A1 (fr) 1974-04-05
NL7212381A (fr) 1974-03-15
CA997822A (en) 1976-09-28
JPS4965081A (fr) 1974-06-24
GB1370088A (en) 1974-10-09
BE804737A (fr) 1974-03-11
DE2342740A1 (de) 1974-03-21
FR2199195B3 (fr) 1976-08-13

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