US3323855A - Method of providing tubular lamps - Google Patents

Method of providing tubular lamps Download PDF

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Publication number
US3323855A
US3323855A US335867A US33586764A US3323855A US 3323855 A US3323855 A US 3323855A US 335867 A US335867 A US 335867A US 33586764 A US33586764 A US 33586764A US 3323855 A US3323855 A US 3323855A
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US
United States
Prior art keywords
lamp
filament
tongue
bulb
cap
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
US335867A
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English (en)
Inventor
Prijn Cornelis
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
North American Philips Co Inc
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 US3323855A publication Critical patent/US3323855A/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

Definitions

  • the apertures serving as reference means are already present in the tongue-shaped projections before the lamp cap is definitely fixed on the lamp vessel.
  • the method employed for fixing the lamp caps on the lamp vessel can correct in this known lamp only comparatively small manufacturing tolerances of the lamp vessel.
  • An object of the present invention is to provide an improved method of providing a tubular lamp with two relatively adjusted reference means, the advantage being obtained that the reference means are not only adjusted with respect to each other but also acquire a prescribed position relative to the filament in the lamp. Besides there is the advantage that, in contrast with the known lamp, the lamp caps are rigidly fixed on the ends of the lamp.
  • the method according to the present invention is characterized in that, after the lamp caps are rigidly fixed on the ends of the lamp, the reference means, while the filament present in the lamp has been given a prescribed position, are formed in the tongueshaped projections by a chipping operation at areas which have a prescribed position relative to the position of the filament. Proceeding in this way affords the advantage that inaccuracies in the manufacture of the lamp vessel, in the location of the filament inside the bulb and the like cannot affect the quality of the lamp ultimately obtained.
  • the present invention is applicable not only to tubular incandescent lamps but also to discharge tubes. In the latter case the discharge path fulfils the function of the filament.
  • the chipping operation usually consists in a drilling or milling operation.
  • the apertures may be obtained by a punching operation.
  • the invention is especially advantageous for lamps of the kind having a comparatively small bulb vessel, such as so-called iodine incandescent lamps.
  • said lamps are employed in combination with optical means such as a reflector and a lens. It is then very important that the filament in the lamp becomes situated in exactly the prescribed position relative to the optical means.
  • FIGURES 1 and 2 are an elevational view and a side view, respectively, of one embodiment ofthe lamp acice cording to the invention, the reference means, which in this example are in the form of circular apertures, being formed in the tongue-shaped projections forming part of the lamp caps.
  • the lamp shown in FIGURES 1 and 2 comprises a bulb 10 closed at its end by seals 11 and 12.
  • the bulb made of quartz glass contains a filament 13.
  • the lamp is a socalled iodine incandescent lamp and is filled through an exhaust tube, the sealing tip of which is indicated by 14, with the required gas filling and the ingredients giving off free iodine during operation of the lamp.
  • Each end of the filament 13 is connected through molybdenum foils 15 and 16, respectively, located in the seals 11 and 12, respectively, to external current supply wires 17 and 18 respectively.
  • Each seal is surrounded by a cap 19, 20 respectively, which is formed of a folded metal strip. As may be seen especially from FIGURE 2, each strip is folded at its end at 21 and 22 respectively. The surfaces thus obtained engage the seal on each side.
  • each cap is provided with strip-shaped parts located laterally of the seals, each two adjacent stripshaped parts being secured together by a welding or soldering operation. This can be seen from the upper part of FIGURE 2 where the strip-shaped parts facing each other and secured to each other are indicated by 19a and 1%. In this way the lamp cap fits through a sleeve-shaped portion on the seal of the lamp and may be fixed on it with the aid of cement.
  • each current supply wire emerging from a seal is led through an aperture (20a) in the cap to the exterior and secured through a bent portion to the material of the cap.
  • the lamp may be connected to an external currentsupply source through apertures 29 and 30, respectively, in tongue-shaped ends 19c and 200 respectively, extending in the longitudinal direction of the lamp, of the caps 19 and 20 respectively.
  • a structure of the cap is thus obtained which is extremely simple, sturdy and reliable.
  • the apertures 29 and 30 are not formed in the tongue-shaped ends until the lamp caps 19 and 20 are rigidly fixed on the seals 11 and 12 respectively.
  • the filament 13 is switched on and projected onto a screen by means of an optical system.
  • the lamp is displaced by means of a suitable holder until the image of the filament finds itself exactly at a prescribed position on the screen. In this position the holder of the lamp and hence the lamp together with the caps and its tongue-shaped projections 19c and 200 is fixed.
  • drills or mills arranged at a prescribed distance from each other and from the filament are moved towards the tongues 19c and 29a and the apertures 29 and 30 formed in said tongues.
  • a method of manufacturing an electric lamp comprising the steps of inserting a filament in the lamp bulb, operatively connecting external current supply wires to said filament, filling said lamp bulb with a gas through an exhaust tube, sealing off said exhaust tube, rigidly fixing a lamp 'cap havingtongue shapedprojections thereon to each end of the lamp bulb, said tongue-shaped projections extending along the longitudial axis of said lamp bulb, displacing the lamp until the filament is located in a predetermined position, and forming reference means in said tongue-shaped projections by cutting into areas thereof Which-have a prescribed location relative to the position of said filament.
  • a method of manufacturing an electric lamp as tongue-shaped projection thereon is formed by folding a metal strip and securing the folded-over parts of said tongue-shaped projection together.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US335867A 1963-01-24 1964-01-06 Method of providing tubular lamps Expired - Lifetime US3323855A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL288161 1963-01-24

Publications (1)

Publication Number Publication Date
US3323855A true US3323855A (en) 1967-06-06

Family

ID=19754372

Family Applications (1)

Application Number Title Priority Date Filing Date
US335867A Expired - Lifetime US3323855A (en) 1963-01-24 1964-01-06 Method of providing tubular lamps

Country Status (8)

Country Link
US (1) US3323855A (ro)
AT (1) AT242236B (ro)
BE (1) BE642856A (ro)
DK (1) DK109048C (ro)
ES (1) ES295599A1 (ro)
GB (1) GB997850A (ro)
IT (1) IT713604A (ro)
NL (1) NL288161A (ro)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8456088B2 (en) 2009-10-22 2013-06-04 Osram Sylvania Inc. PAR lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3609937C1 (en) * 1986-03-24 1987-06-11 Klimsch & Co Burner for an exposure device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792374A (en) * 1927-01-26 1931-02-10 Jacopozzi Fernand Tubular incandescent lamp and support therefor
US2048491A (en) * 1935-01-18 1936-07-21 Gen Electric Electric lamp
US2864025A (en) * 1953-08-24 1958-12-09 Gen Electric Infrared ray generating device
US2886629A (en) * 1955-07-19 1959-05-12 Philips Corp Electric lamp with flat terminal member
US3093768A (en) * 1961-02-01 1963-06-11 Gen Electric Electric lamp base end structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792374A (en) * 1927-01-26 1931-02-10 Jacopozzi Fernand Tubular incandescent lamp and support therefor
US2048491A (en) * 1935-01-18 1936-07-21 Gen Electric Electric lamp
US2864025A (en) * 1953-08-24 1958-12-09 Gen Electric Infrared ray generating device
US2886629A (en) * 1955-07-19 1959-05-12 Philips Corp Electric lamp with flat terminal member
US3093768A (en) * 1961-02-01 1963-06-11 Gen Electric Electric lamp base end structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8456088B2 (en) 2009-10-22 2013-06-04 Osram Sylvania Inc. PAR lamp

Also Published As

Publication number Publication date
ES295599A1 (es) 1964-07-16
NL288161A (ro)
IT713604A (ro)
GB997850A (en) 1965-07-07
BE642856A (ro) 1964-07-22
DK109048C (da) 1968-03-11
AT242236B (de) 1965-09-10

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