EP1247290A2 - Luminous element for a lamp - Google Patents
Luminous element for a lampInfo
- Publication number
- EP1247290A2 EP1247290A2 EP00989817A EP00989817A EP1247290A2 EP 1247290 A2 EP1247290 A2 EP 1247290A2 EP 00989817 A EP00989817 A EP 00989817A EP 00989817 A EP00989817 A EP 00989817A EP 1247290 A2 EP1247290 A2 EP 1247290A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- luminous element
- winding
- winding spindle
- wire
- double helix
- 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- Withdrawn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
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
- H01K3/02—Manufacture of incandescent bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/14—Incandescent bodies characterised by the shape
Definitions
- the present invention relates to a filament for an incandescent lamp, in particular a filament having the shape of a double helix, with two connections arranged at one end of the double helix. It further relates to an incandescent lamp with such a luminous element, a method for producing such a luminous element and a device for carrying out the production method.
- a luminous element according to the preamble of claim 1 is known from DE 4420 607, see there FIG. 3 and the associated description.
- a filament has the disadvantage that it is very susceptible to flashover in the area of the lowest pair of turns. Due to tolerances in the manufacture of the filament, there are squeezing of the filament, i.e. its installation in a base, deformations that lead to an exacerbation of the problem mentioned.
- This object is achieved in a luminous element with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.
- the measure according to the invention increases the distance between adjacent turns from one another in space. This results in a significantly lower sensitivity to positional tolerances when pinching.
- the embodiment according to the invention still offers the advantages known from the prior art: for example, the currents flowing in the adjacent turns are always opposite. The individual turns therefore repel each other due to the spiral current.
- the electrical inductance of a double helix is significantly smaller, i.e. the lamp becomes more efficient in terms of its useful radiation generation and emits less electromagnetic interference.
- the formation of a luminous body according to a double helix enables the stepless adjustment of the active helix length, since the orientation of the cross connection of the two halves of the double helix can be chosen as desired with respect to the connections. This results in a complete freedom of design for the sizes diameter, height, wire size and power.
- the second measure ie the increase in the pitch of the turns alone, does not solve the problem mentioned above, since the double helix has the least mechanical stability at the end. de, on which the connections are located. Accordingly, if only the pitch of the turns is increased, this results in an even lower mechanical stability. Movements within the lamp body, especially when switched on due to inductive processes, therefore lead to an even greater short-circuit tolerance.
- the sensitivity to positional tolerances in the case of pinching is not reduced if the second measure is used alone, since these positional tolerances mainly occur transversely to the longitudinal axis of the luminous element.
- the purpose of the steady increase is to bring about a continuous increase in the spacing of the turns in space, since if only the last two turns are further apart, the problem is shifted to the penultimate turns.
- a steady increase is therefore to be understood in particular as a linear, quadratic, cubic or exponential increase.
- the invention also relates to a method for producing a luminous element according to the invention and to a device for carrying out the production method according to claim 10.
- the wire forming the filament is simply placed in a notch at the narrow end of the winding spindle before the double helix is formed by winding the wire on the spindle.
- each free wire end is bent over at a bending section of the winding spindle, so that after the bending, the wire ends are oriented essentially in the direction of the longitudinal axis of the winding spindle. This makes it possible that no subsequent processing step, which would have the purpose of bending the connections, must connect.
- the winding of the wire on the winding spindle can be achieved by rotating the wire around a fixed winding spindle or rotating the winding spindle around its longitudinal axis between non-rotating wire feeds.
- this relative movement can take place in such a way that the pitch of the windings on the winding spindle increases steadily from the narrow end of the winding spindle to the winding end section.
- Figure 1 is a side view of a filament according to the invention.
- FIG. 2 shows a sequence to illustrate the manufacturing method according to the invention.
- Figure 3 is a detailed view of a winding spindle, as used in the manufacturing process according to the invention or in the device for carrying out the manufacturing process.
- the luminous element 10 has the shape of a double helix.
- the turns of the double helix have a diameter D1, on the side of the connections 18, 20 a diameter D2.
- the windings have a winding pitch S1, on the side on which the connections 18, 20 of the luminous element 10 lie, a winding pitch S2. While the diameter increases steadily from Dl to D2 from the cross-connection side to the connection side, the winding pitch increases from S1 to S2 from the cross-connection side to the connection side.
- the steady increase is exponential.
- the continuity of the increase is essential, so that in particular a quadratic, cubic or exponential increase can also be considered.
- FIG. 2 shows a sequence of steps which illustrate a method for producing the luminous element according to the invention.
- FIG. 2a shows two wire feeds 22a, 22b, between which the wire 24 forming the luminous element 10, to which a winding spindle 26 is located, is tensioned.
- the winding spindle 26 has a bending section 28, to which we will come back later.
- 2b, 2c and 2d show how the wire 24 is inserted into a notch 30 at the narrow end 25 of the winding spindle 26 and then by rotation and appropriate forward movement of the winding spindle 26 the wire 24 in a desired manner, cf. Fig. 1, is wound on the winding spindle 26.
- the feeds 22a, 22b release wire in this case.
- the diameter of the winding spindle 26 increases continuously from its narrow end 25 to the winding end section 32.
- a bending section 28 is provided for each of the two connections, the two bending sections 28a, 28b being symmetrically opposed with respect to the winding spindle.
- 3 shows an enlarged representation of the winding spindle 26 with the wire 24 wound on it and the two bending sections 28a, 28b.
- the bending sections 28a, 28b can be adjusted along the region of the winding spindle 26, which is characterized by a steady increase in its diameter.
- the winding end section 32 can thus be varied.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10001007A DE10001007A1 (en) | 2000-01-12 | 2000-01-12 | Lighting body for incandescent lamp is double helix with two connections at one end; diameter of double helix and pitch of its windings increase steadily towards the connections |
DE10001007 | 2000-01-12 | ||
PCT/DE2000/004272 WO2001052305A2 (en) | 2000-01-12 | 2000-11-30 | Luminous element for a lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1247290A2 true EP1247290A2 (en) | 2002-10-09 |
Family
ID=7627295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00989817A Withdrawn EP1247290A2 (en) | 2000-01-12 | 2000-11-30 | Luminous element for a lamp |
Country Status (8)
Country | Link |
---|---|
US (1) | US6777860B2 (en) |
EP (1) | EP1247290A2 (en) |
JP (1) | JP2003521088A (en) |
CN (1) | CN1235266C (en) |
CA (1) | CA2396929A1 (en) |
DE (1) | DE10001007A1 (en) |
TW (1) | TW487947B (en) |
WO (1) | WO2001052305A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10040253A1 (en) * | 2000-08-14 | 2002-02-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Compact high-voltage light bulb |
DE102004040415A1 (en) * | 2004-08-19 | 2006-02-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electric light bulb for vehicle headlights |
DE102004040417A1 (en) * | 2004-08-19 | 2006-02-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electric light bulb for vehicle headlights |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE482360C (en) * | 1929-09-16 | Patra Patent Treuhand | Helical lamp for electric light bulbs | |
US1143909A (en) * | 1913-03-14 | 1915-06-22 | Herman J Jaeger | Metallic-filament lamp. |
GB191308568A (en) | 1913-04-11 | 1914-02-19 | Tito Giusti | Improvement of the Incandescent Electric Lamp. |
US1279789A (en) * | 1917-01-31 | 1918-09-24 | Chas F Rott | Incandescent lamp. |
US1600563A (en) * | 1924-07-30 | 1926-09-21 | Charles A Proctor | Incandescent electric lamp |
US1858676A (en) * | 1928-06-04 | 1932-05-17 | Frederick S Mccullough | Cathode |
BE441086A (en) | 1940-04-06 | |||
DE4420607A1 (en) * | 1994-06-13 | 1995-12-14 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric incandescent lamp and filament for incandescent lamps |
JP3852242B2 (en) * | 1999-05-24 | 2006-11-29 | ウシオ電機株式会社 | Incandescent lamp for heat source |
-
2000
- 2000-01-12 DE DE10001007A patent/DE10001007A1/en not_active Withdrawn
- 2000-11-30 WO PCT/DE2000/004272 patent/WO2001052305A2/en active Application Filing
- 2000-11-30 CA CA002396929A patent/CA2396929A1/en not_active Abandoned
- 2000-11-30 EP EP00989817A patent/EP1247290A2/en not_active Withdrawn
- 2000-11-30 US US10/169,878 patent/US6777860B2/en not_active Expired - Fee Related
- 2000-11-30 CN CNB008183406A patent/CN1235266C/en not_active Expired - Fee Related
- 2000-11-30 JP JP2001552428A patent/JP2003521088A/en active Pending
- 2000-12-27 TW TW089127955A patent/TW487947B/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0152305A2 * |
Also Published As
Publication number | Publication date |
---|---|
CA2396929A1 (en) | 2001-07-19 |
US6777860B2 (en) | 2004-08-17 |
TW487947B (en) | 2002-05-21 |
DE10001007A1 (en) | 2001-07-19 |
WO2001052305A3 (en) | 2002-02-07 |
CN1423829A (en) | 2003-06-11 |
US20030001480A1 (en) | 2003-01-02 |
WO2001052305A2 (en) | 2001-07-19 |
CN1235266C (en) | 2006-01-04 |
JP2003521088A (en) | 2003-07-08 |
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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 |
|
17P | Request for examination filed |
Effective date: 20020515 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7H 01K 1/14 A, 7H 01K 3/02 B |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH CY DE DK FR GB IT LI NL |
|
17Q | First examination report despatched |
Effective date: 20050119 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20080603 |