EP0122045A2 - Lampes à incandescence - Google Patents
Lampes à incandescence Download PDFInfo
- 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- Withdrawn
Links
Images
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8309560 | 1983-04-08 | ||
| GB838309560A GB8309560D0 (en) | 1983-04-08 | 1983-04-08 | Incandescent lamps |
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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2160016A (en) * | 1984-06-06 | 1985-12-11 | Gen Electric Co Plc | Incandescent lamps |
| US8459525B2 (en) | 2008-02-14 | 2013-06-11 | Ethicon Endo-Sugery, Inc. | Motorized surgical cutting and fastening instrument having a magnetic drive train torque limiting device |
Citations (2)
| 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 |
-
1983
- 1983-04-08 GB GB838309560A patent/GB8309560D0/en active Pending
-
1984
- 1984-03-09 EP EP84301593A patent/EP0122045A3/fr not_active Withdrawn
- 1984-03-09 GB GB848406273A patent/GB8406273D0/en active Pending
Patent Citations (2)
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2160016A (en) * | 1984-06-06 | 1985-12-11 | Gen Electric Co Plc | Incandescent lamps |
| US8459525B2 (en) | 2008-02-14 | 2013-06-11 | Ethicon Endo-Sugery, Inc. | Motorized surgical cutting and fastening instrument having a magnetic drive train torque limiting device |
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 |
Free format text: ORIGINAL CODE: 0009013 |
|
| 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 |