EP0122045A2 - Lampes à incandescence - Google Patents

Lampes à incandescence Download PDF

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Publication number
EP0122045A2
EP0122045A2 EP84301593A EP84301593A EP0122045A2 EP 0122045 A2 EP0122045 A2 EP 0122045A2 EP 84301593 A EP84301593 A EP 84301593A EP 84301593 A EP84301593 A EP 84301593A EP 0122045 A2 EP0122045 A2 EP 0122045A2
Authority
EP
European Patent Office
Prior art keywords
filament
lamp
support
wires
sections
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.)
Withdrawn
Application number
EP84301593A
Other languages
German (de)
English (en)
Other versions
EP0122045A3 (fr
Inventor
Sydney Alfred Richard Ridgen
Graham Warren Skeldon
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.)
Ledvance Ltd
Original Assignee
General Electric Company PLC
Osram GEC Ltd
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 Company PLC, Osram GEC Ltd filed Critical General Electric Company PLC
Publication of EP0122045A2 publication Critical patent/EP0122045A2/fr
Publication of EP0122045A3 publication Critical patent/EP0122045A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/16—Electric connection thereto
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body

Definitions

  • This invention relates to electric incandescent filament lamps, and particularly to halogen cycle studiolamps of the type comprising, within a sealed envelope, a filament having a plurality of closely adjacent filament sections lying substantially in the same plane supported within a framework consisting of a pair of longitudinally extending support wires fixed in position within the envelope at one end, and a pair of insulating bridge members extending between the support wires and carrying a number of anchor wires which engage and support different parts of the filament.
  • lamps When such lamps are in use vertically, meaning that the axis of the lamp, the support wires and the filament sections are all substantially vertical, they present no problem.
  • lamps of this construction having a high power output, for example 2 kW or more, are used in the horizontal position, it has been found that the lamps burn out after a very short period of time compared to their lifetime when in the vertical position.
  • the invention therefore provides an electric incandescent filament lamp of the type specified in which there is an odd number of filament sections such that the connection of one end of the filament to one support wire is remote from the connection of the other end of the filament to the other support wire. It has been found that this modification significantly prolongs the life of the lamps when used in the horizontal position.
  • the number of filament sections employed in a lamp in accordance with the invention will usually be at least five and not more than nine, although the most suitable number will depend upon the form of lamp and its required power output.
  • the lamp comprises a transparent quartz envelope 1 of generally tubular form with a bulbous central portion, the envelope being domed at one end, and closed by a pressing at its opposite end.
  • Current leads through the pinch 2 are provided by strips 13 of molybdenum foil, against which the quartz is pressed, the inner and outer ends of the strips being connected to filament support conductors 6, 7 and terminal pin conductors 3 adjacent ends of which are also embedded in the quartz of the pinch 2.
  • the terminal pin conductors 3 pass through a ceramic support member 4 which supports the pinch 2 and are brazed or arc welded at their outer ends into respective terminal pins 23.
  • a coiled tungsten filament 5 comprising an even plurality of substantially parallel and closely-spaced filament sections each lying perpendicular to the pinch 2, the filament sections lying either in a common plane or in a staggered relationship in two closely-adjacent parallel planes.
  • the filament 5 is mounted within a rectangular supporting framework consisting of the two support wires 6 and 7 which extend longitudinally along the envelope, and two short quartz rods 8 and 9 extending transversely between the support wires at a greater and a lesser distance respectively from the pinch.
  • the rods 8 and 9 are rigidly connected to the support wires 6 and 7 by means of connecting wires 10 passing through the ends of the rods and attached to the support wires.
  • Anchor wires 11 are fixed in the rods, two in rod 8 and three in rod 9, and are hooked at their ends facing each other and engage the hooked portions 12 connecting adjacent filament sections. Each end of the filament 5 is connected to a respective support wire.
  • the lamp envelope contains a filling of an inert gas at a cold pressure of at least 2, for example on the order of 2), atmospheres, together with a small quantity of a halogen, such as bromine, as is customary in halogen cycle studio lamps.
  • a halogen such as bromine

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP84301593A 1983-04-08 1984-03-09 Lampes à incandescence Withdrawn EP0122045A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838309560A GB8309560D0 (en) 1983-04-08 1983-04-08 Incandescent lamps
GB8309560 1983-04-08

Publications (2)

Publication Number Publication Date
EP0122045A2 true EP0122045A2 (fr) 1984-10-17
EP0122045A3 EP0122045A3 (fr) 1985-10-23

Family

ID=10540809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301593A Withdrawn EP0122045A3 (fr) 1983-04-08 1984-03-09 Lampes à incandescence

Country Status (2)

Country Link
EP (1) EP0122045A3 (fr)
GB (2) GB8309560D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160016A (en) * 1984-06-06 1985-12-11 Gen Electric Co Plc Incandescent lamps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597681A (en) * 1950-07-01 1952-05-20 Gen Electric Electric incandescent lamp
US3621111A (en) * 1970-07-01 1971-11-16 Gen Electric Lead-in conductor for electrical devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160016A (en) * 1984-06-06 1985-12-11 Gen Electric Co Plc Incandescent lamps

Also Published As

Publication number Publication date
GB8406273D0 (en) 1984-04-11
GB8309560D0 (en) 1983-05-11
EP0122045A3 (fr) 1985-10-23

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE NL

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE NL

17P Request for examination filed

Effective date: 19860120

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OSRAM- GEC LIMITED

17Q First examination report despatched

Effective date: 19870504

D17Q First examination report despatched (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19880217

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RIDGEN, SYDNEY ALFRED RICHARD

Inventor name: SKELDON, GRAHAM WARREN