EP0569208A1 - Lampe à décharge à basse pression - Google Patents

Lampe à décharge à basse pression Download PDF

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Publication number
EP0569208A1
EP0569208A1 EP93303444A EP93303444A EP0569208A1 EP 0569208 A1 EP0569208 A1 EP 0569208A1 EP 93303444 A EP93303444 A EP 93303444A EP 93303444 A EP93303444 A EP 93303444A EP 0569208 A1 EP0569208 A1 EP 0569208A1
Authority
EP
European Patent Office
Prior art keywords
control circuit
low pressure
lamp assembly
discharge lamp
housing
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.)
Granted
Application number
EP93303444A
Other languages
German (de)
English (en)
Other versions
EP0569208B1 (fr
Inventor
Dennis Goldman
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
Original Assignee
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
Publication of EP0569208A1 publication Critical patent/EP0569208A1/fr
Application granted granted Critical
Publication of EP0569208B1 publication Critical patent/EP0569208B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path

Definitions

  • This invention relate to a low pressure discharge lamp assembly, and in particular to a low pressure mercury vapour discharge lamp assembly.
  • a lamp of this type comprises an H-shaped discharge tube terminating at one end in a connector which can be plugged into a base.
  • the connector may contain starter circuitry, and the base usually houses a ballast.
  • the base in turn terminates in a bayonet or screw connector for coupling with a light fitting.
  • An entire discharge lamp assembly of the type described above is usually too long to fit into a conventional light fitting which has been designed to house an incandescent filament light bulb. As a result, many light fittings need to be changed to accommodate such a low pressure discharge lamp assembly.
  • a low pressure discharge lamp assembly comprising a base terminating in a fitting, an elongate control circuit housing being mountable to the base opposite the fitting, and at least a pair of discharge tubes flanking the control circuit housing, the discharge tubes extending away from the base and being splayed away from one another.
  • control circuit housing is provided with a reflective outer surface for reflecting light outwardly from the discharge tubes.
  • the discharge tubes extend away from the base in a vee-shaped configuration.
  • control circuit housing houses both ballast and electronic starter circuitry.
  • control circuit housing is detachably mountable to the base via an electromechanical connection, the electromechanical connection including a first set of connectors for connecting the fitting electrically to the control circuit for powering thereof and a second set of connectors for connecting outputs from the control circuit to input leads connected to the discharge tubes.
  • control circuit housing includes an electromagnetic and radio frequency interference shield for protecting the control circuit.
  • the discharge tubes may be rectilinear.
  • the control circuit housing is conveniently wedge-shaped, with the housing tapering outwardly from the base.
  • An acute included angle of between 20° and 40°, and preferably 30°, may be defined between the discharge tubes.
  • the maximum width of the assembly is advantageously defined by the outermost ends of the discharge tubes, and corresponds to or is less than the maximum width of a conventional incandescent filament light bulb.
  • the overall length of the assembly is conveniently reduced by virtue both of the control circuit housing being positioned alongside and between the discharge tubes rather than between the fixed ends of the discharge tubes and the fitting and by the discharge tubes being splayed away from one another.
  • a first embodiment of a low pressure mercury vapour discharge lamp assembly 10 comprises a base 12 terminating in a screw connector fitting 14.
  • a pair of 7 Watt H-shaped biaxial mercury discharge tubes 16 and 18 of the type manufactured by General Electric extend upwardly from the base in a V-configuration, and are angled from one another at an included angle of approximately 24°, as shown at 20.
  • the discharge tubes 16 and 18 flank a central housing 22 which is wedge-shaped in profile.
  • the central housing 22 houses electronic starter circuitry as a well as a choke or ballast.
  • the housing 22 has connection pins 24 which allow it to be plugged into a socket arrangement 26 which extends axially from the centre of the base 12.
  • the housing preferably has a reflective metallic coating, such as an aluminium coating, applied to its outer surface by vacuum deposition for enhancing its reflectivity.
  • the metallic coating doubles as an electromagnetic and radio frequency interference shield for effectively shielding the control circuitry.
  • the reflective outer surface may alternatively be constituted by a white plastics material having a gloss finish.
  • a further option is to spray a conductive nickel coating onto the outer surface of the housing.
  • the housing has a pair of opposed reflective faces 28 and 30, which are arranged to reflect light emitted from the discharge tubes 16 and 18.
  • Each face comprises a raised pair of triangular facets 32 and 34 flanked by a flat pair of triangular facets 36 and 38.
  • Rectangular side faces 40 and 42 extend between the opposed faces 28 and 30.
  • the facets 32 and 34 are angled at approximately 110° from one another in order to provide an even distribution of reflected light from the respective discharge tubes 16 and 18.
  • the overall length 44 of the discharge lamp assembly from the top of the screw connector 14 to the end of the discharge tubes 16 and 18 is approximately 102mm.
  • the maximum width 46 of the discharge lamp assembly is approximately 55 mm.
  • the housing 22 is unplugged from the base and the discharge tubes 16 and 18 and the base 12 to which they are mounted are disposed of The housing 22 is then plugged into a replacement base 12, from which fresh discharge tubes 16 and 18 extend.
  • FIG. 6 a second embodiment of a fluorescent lamp assembly 48 is shown which is similar to the embodiment of Figures 1 to 4, with a pair of FW U-shaped tubes 16A and 18A being angled further apart from one another at an included angle of 30°, as is shown at 50.
  • the central housing 22A is of substantially the same shape as the central housing 22, save that it has rectangular side faces 40A and 42A which are substantially narrower than the rectangular side faces 40 and 42.
  • a printed circuit board, which is indicated in broken outline at 52, is populated with various circuit components 54, including starter circuitry and at last one ballast or choke.
  • a ten pin socket 56 is embedded within the base 12A.
  • a first pair of leads 57 extends from the lower ends of the first two sockets 58. The leads 57 extend into a cathode terminal 60 of the fluorescent U-tube 16A.
  • a similar pair of leads extend from second and third sockets 62 into an anode terminal of the U-tube 16A.
  • a positive lead 64 extends from a base contact 66 of the fitting to the lower end of a fifth socket 68, and an earth or negative lead 70 extends from a sixth socket 72 to an outer earth or negative shell 74 of the screw fitting 14.
  • the sixth to tenth sockets 76 are provided with corresponding lead which extend into the respective cathode and anode terminals of the U-tube 18A.
  • One pair of cathode leads is shown at 78.
  • the housing 22A terminates in a corresponding ten pin plug 80 which is arranged to plug into the socket 56.
  • FIG. 9 an alternative embodiment of a discharge lamp assembly is shown having a pair of U-tubes 82 and 84 withcorresponding base portions 86 and 88 which extend upwardly from the base 12A in a splayed vee-shaped configuration
  • the base portions 86 and 88 terminate in respective upright portions 90 and 92 which are parallel both to one another and to a central axis of symmetry 94.
  • a suitably shaped control circuit housing 96 extends between the U-tubes 82 and 84.
  • the housing has an upper portion 98 which is square-cylindrical in form, thereby allowing increased space for the various circuitry components such as the starter circuitry and the ballast.
  • a conventional incandescent bulb is superimposed in broken outline at 100 onto the embodiment illustrated in Figure 9.
  • FIG. 11A a downlight sample test was performed in which a conventional CAS-PROLUX ® 11W-PLE-230V-S lamp assembly 102 was fitted within a cascade downlighter 104. At an average light intensity was measured over a luminous area of 300 cm2 located beneath the downlighter 104. A accompanying polar graph 106 is shown in which average intensity in candelas per kilolumen was measured against degrees. Measurements were taken in the horizontal (0-180°) as well as the vertical (90-270°) planes. The same test was then performed with a fluorescent lamp assembly 48 of the type illustrated in Figure 5, so as to yield a polar graph 108.
  • the fluorescent lamp assembly of the invention enjoys a number of advantages over conventional lamp assemblies. Its compact dimensions allow it to be fitted to conventional incandescent light sockets without having to change any light housings. For the same or an even greater light output, it has a power consumption considerably less than that of a conventional incandescent bulb. The bulbs can be replaced without disposing of the starter circuitry, and vice versa.
  • the discharge light assembly of the invention makes use of rectilinear fluorescent tubes, which are relatively easy to manufacture in comparison with tubes having more unconventional curved shapes.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
EP93303444A 1992-05-04 1993-05-04 Lampe à décharge à basse pression Expired - Lifetime EP0569208B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA923212 1992-05-04
ZA923212 1992-05-04

Publications (2)

Publication Number Publication Date
EP0569208A1 true EP0569208A1 (fr) 1993-11-10
EP0569208B1 EP0569208B1 (fr) 1997-01-08

Family

ID=25581638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93303444A Expired - Lifetime EP0569208B1 (fr) 1992-05-04 1993-05-04 Lampe à décharge à basse pression

Country Status (6)

Country Link
EP (1) EP0569208B1 (fr)
JP (1) JPH06132016A (fr)
AT (1) ATE147541T1 (fr)
CA (1) CA2095468A1 (fr)
DE (1) DE69307181D1 (fr)
ZA (1) ZA933158B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29518894U1 (de) * 1995-11-30 1996-01-25 Holzer, Walter, Prof. Dr.h.c. Ing., 88709 Meersburg Kompaktleuchtstofflampe mit Reflektor
DE29518752U1 (de) * 1995-11-29 1996-01-25 Holzer, Walter, Prof. Dr.h.c. Ing., 88709 Meersburg Gasentladungsgefäß für einseitig gesockelte Leuchtstofflampen
DE4439727A1 (de) * 1994-11-09 1996-05-15 Walter Holzer Sockel für Kompaktlampen
DE19607208A1 (de) * 1996-02-26 1997-08-28 Holzer Walter Prof Dr H C Ing Leuchtstofflampe mit auswechselbarem Leuchtteil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210877A1 (fr) * 1985-06-27 1987-02-04 Elene S.A. Lampe à tube fluorescent
EP0447957A2 (fr) * 1990-03-19 1991-09-25 Walter Holzer Lampe fluorescente compacte

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210877A1 (fr) * 1985-06-27 1987-02-04 Elene S.A. Lampe à tube fluorescent
EP0447957A2 (fr) * 1990-03-19 1991-09-25 Walter Holzer Lampe fluorescente compacte

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439727A1 (de) * 1994-11-09 1996-05-15 Walter Holzer Sockel für Kompaktlampen
DE29518752U1 (de) * 1995-11-29 1996-01-25 Holzer, Walter, Prof. Dr.h.c. Ing., 88709 Meersburg Gasentladungsgefäß für einseitig gesockelte Leuchtstofflampen
DE29518894U1 (de) * 1995-11-30 1996-01-25 Holzer, Walter, Prof. Dr.h.c. Ing., 88709 Meersburg Kompaktleuchtstofflampe mit Reflektor
DE19607208A1 (de) * 1996-02-26 1997-08-28 Holzer Walter Prof Dr H C Ing Leuchtstofflampe mit auswechselbarem Leuchtteil
DE19607208C2 (de) * 1996-02-26 2002-02-21 Walter Holzer Leuchtstofflampe mit auswechselbarem Leuchtteil

Also Published As

Publication number Publication date
DE69307181D1 (de) 1997-02-20
ATE147541T1 (de) 1997-01-15
EP0569208B1 (fr) 1997-01-08
CA2095468A1 (fr) 1993-11-05
JPH06132016A (ja) 1994-05-13
ZA933158B (en) 1993-12-07

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