GB2100404A - Discharge lamps-combined lamp and socket - Google Patents
Discharge lamps-combined lamp and socket Download PDFInfo
- Publication number
- GB2100404A GB2100404A GB8216374A GB8216374A GB2100404A GB 2100404 A GB2100404 A GB 2100404A GB 8216374 A GB8216374 A GB 8216374A GB 8216374 A GB8216374 A GB 8216374A GB 2100404 A GB2100404 A GB 2100404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- socket
- lamp
- terminals
- lamp cap
- discharge
- 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
Links
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- RMUKCGUDVKEQPL-UHFFFAOYSA-K triiodoindigane Chemical class I[In](I)I RMUKCGUDVKEQPL-UHFFFAOYSA-K 0.000 description 2
- -1 tungsten halogen Chemical class 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910001511 metal iodide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
- H01R33/05—Two-pole devices
- H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
- H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
- H01J5/56—Shape of the separate part
Landscapes
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
When discharged lamps are switched off after running for some time the voltage required to re-start them is very much higher than the voltage required when starting the lamp from cold. This can cause problems with arcing between lamp components. In a single ended discharge lamp and socket combination according to the invention this problem is catered for by the provision of a further insulating member placed between the lamp cap terminals. The further insulating member can be located within a slot formed in the lamp cap body or it can be formed as an extension of the lamp cap body fitting within a slot in the socket. <IMAGE>
Description
SPECIFICATION
Discharge lamps-combined lamp and socket
This invention relates to gas discharge lamps of the single ended type. More particularly the invention relates to compact source single ended discharge lamps. Such lamps have proved to be particularly suitable for use in a mirror or lens optical system. A particular type of compact source lamp known as CSl contain a gas mixture comprising metal iodides, mercury and an inert gas such as argon. A further particular type of compact source lamp known as CID lamps have a composition and pressure of the gas fill adjusted to yield an emission spectrum more closely resembling that of natural daylight and usually contains tin and indium iodides together with mercury or argon gas.Discharge takes place between a pair of spaced electrodes sealed within the lamp envelope and the discharge is started by applying a suitably high voltage pulse across the input leads. Problems can be experienced when trying to re-start these lamps after switching off since the voltage required for re-ignition is greatly increased while the lamp is still hot. For example a 200 watt lamp may easily start when cold, with a pulse around 7 kV, but this must be substantially increased if the lamp is to be started in a hot condition. A further problem is that it is often desirable to use such lamps on a retrofit basis to replace tungsten halogen lamps in existing optical systems.However, the sockets which take the tungsten halogen lamps cannot sustain the higher voltages required to achieve the hot re-strike of such discharge lamps, and hence arcing can occur between the pin terminals and other conductive members within the lamp and socket construction.
Increased insulation could be achieved by increasing the spacing of the respective terminals but this is undesirable since increases in physical dimensions tend to obstruct the optics.
An object of this invention is to provide a single ended discharge lamp with an increased resistance to arcing between conducting members without materially increasing the dimensions of the existing low voltage lamp caps and sockets.
According to the invention we provide a combination lamp and socket, said lamp comprising a single ended discharge lamp having two discharge electrodes mounted in an envelope and electrically connected by respective foils and leads to respective pin terminals, said lamp further comprising electrically conducting lamp cap terminals connected to the pin terminals and emergent from the lamp cap, said socket comprising an insulating socket housing member including socket terminals connectable to an electric supply in which the lamp cap terminals may be inserted to complete a circuit, the combination further including an additional member of insulating material between respective lamp cap terminals and socket connections thereby to increase insulation between the lamp terminals.
The invention also embraces the provision of a lamp for use in the lamp and socket combination of the invention.
Furthermore the invention embraces also the provision of a socket for use with the lamp and socket combination of the invention.
In a preferred embodiment the additional insulating member is formed as an integral part of the socket which fits within a slot formed in the lamp cap. If desired, however, the additional insulating member may be formed on the lamp cap member and arranged to fit within a depression formed within the socket.
In a further preferred embodiment the additional insulating member as well as extending upwardly above the socket also extends outwardly from the sides of the socket.
In a further preferred embodiment the lamp cap, socket and additional insulating member are each made of an insulating ceramic material such as Steatite, a commercially available material.
The invention will now be described by way of example with reference to the accompanying drawings wherein,
Figure 1 is an elevation of the lamp of the combination,
Figure 2 is an elevation of the socket of the combination,
Figure 3 is a sectional elevation of the lamp of the combination,
Figure 4 is a sectional end elevation of the lamp of the combination,
Figure 5 is a sectional end elevation of the socket of the combination,
Figure 6 shows a perspective view of the lamp and socket combination of the invention, and
Figure 7 is a perspective view of an alternate form of the invention,
Figure 1 shows a compact source discharge lamp 10, in this case, a 200 watt CID lamp. The lamp 10 comprises an outer quartz envelope 12 containing a fill of tin and indium iodide together with mercury and argon gas.Below the envelope 12 there is formed a pinch seal 13, and embedded in the pinch seal 1 3 are molybdenum foil members 14 and 1 5 having connected thereto respective electrode shank members 1 6 and 1 7 and electrically conducting pin members 18 and 19. The shank members 16 and 17 carry respectively overwound tungsten electrodes 26 and 27. Fitted around the base of the pinch seal 13 is a lamp cap member 11 of insulating material, such as, Steatite and lamp cap terminals 20 and 21 are respectively attached to the pin members 18 and 1 9. Lamp cap terminals 20 and 21 emerge from the lamp cap member 11 so that they can be inserted in a suitable socket member.
The lamp cap 11 has pockets 22 and 23 formed within it which form a housing respectively for quartz shrouds 24 and 25 which are fused to the bottom of the pinch seal. These shrouds assist in insulating the pin members 18 and 19 but, in accordance, with the invention it has been found necessary to adopt further measures to increase the insulation thereby to reduce the arcing which occurs during the high voltages generated in a hot re-strike starting procedure. It will be noted that the lamp cap 11, as best seen in Figure 6 has a central slot 28 for a purpose to be described.
Figure 2 shows a socket 30 which is used in combination with the lamp 10. The socket 30 comprises a socket housing member 31 which as best seen in Figure 6 in the form of an elongate rectangular body of insulating material which can be similar to the insulating material of the lamp cap 11, i.e. Steatite. The socket housing member has socket terminals 32 and 33 shown dotted in
Figure 2 which take the lamp cap terminals 21 and 20. Electrical connection from a suitable mains supply is made through leads 34 and 35 in any acceptable manner. In accordance with the invention and to reduce the tendency for arcing between the respective lamp cap and socket terminal connection, an additional insulating member is provided between the said lamp cap and socket terminal connections.In Figure 2 this is seen to comprise an upstanding member 36 which is formed as an integral part of the main body member 31 of the socket. From Figure 2 it is seen that the member 36 projects upwardly above the top surface 37 of the socket 31 and, in fact, is arranged to fit snugly within the slot 28 in the lamp cap 11. It will be clear from a consideration of Figure 1 and Figure 2 that the insertion of the lamp cap terminals within their respective sockets will result in the member 36 fitting snugly within the slot 28. This will increase the path that an arc has to traverse and tends to eliminate arcing in the circuit. From Figure 5 it will be clear that the member 36 also extends sidewise of the socket body member 31 , that is, in a direction across the centre line of the socket terminals which is perhaps made clearer in the perspective view of Figure 6.
Figure 7 shows an alternate form of the invention wherein a lamp 1 0a is combined with a socket 30a. The lamp has lamp cap terminals 20a and 21 a which can be inserted within their respective socket terminals 32a and 33a in the socket body 31 a. In this form of the invention the additional insulating member 36a is formed as part of the lamp cap member 11 a and fits within a depression 40 in the socket body 31 a. As in the previous embodiment a base member 38a is provided which allows the socket to be attached to a device with which the lamp is to be used.
Claims (13)
1. A combination lamp and socket, said lamp comprising a single ended discharge lamp having two discharge electrodes mounted in an envelope and electrically connected by respective foils and leads to respective pin terminals, said lamp further comprising electrically conducting lamp cap terminals connected to the pin terminals and emergent from the lamp cap, said socket comprising an insulating socket housing member including socket terminals connectable to an electric supply in which the lamp cap terminals may be inserted to complete a circuit, the combination further including an additional member of insulating material between respective lamp cap terminals and socket connections thereby to increase insulation between the lamp terminals.
2. A combination lamp and socket according to
Claim 1 wherein the additional insulating member is formed as an integral part of the socket which fits within a slot formed in the lamp cap.
3. A combination lamp and socket according to
Claim 1 wherein the additional insulating member is formed on the lamp cap member and arranged to fit within a depression formed within the socket
4. A combination lamp cap and socket according to Claim 2 wherein that part of the socket forming the additional member is greater in width than the body of the socket member of which it forms a part.
5. A combination lamp and socket according to
Claim 2 wherein the slot divides the lamp cap substantially into two leg members, each leg member containing conducting members shrouded in a quartz sleeve.
6. A combination lamp and socket according to
Claim 5 wherein the quartz sleeve is formed as part of a pinch seal connected to the envelope.
7. A single ended discharge lamp having two discharge electrodes mounted in a discharge envelope of light transmitting material, the lamp being connected by respective foils and leads to respective pin terminals, the discharge lamp further comprising a lamp cap body having lamp cap terminals emergent from said body and electrically connected to said leads said lamp further comprising an additional insulating member located between the lamp cap terminals.
8. A discharge lamp according to Claim 7 wherein the additional insulating member comprises a portion of the lamp cap body projecting between the lamp cap terminals.
9. A discharge lamp according to Claim 7 wherein the lamp cap body has a slotted portion extending between the lamp cap terminals and the additional insulating member is arranged to fit within this slot.
10. A socket for a discharge lamp, said socket including a socket housing member having a socket terminal in which the lamp cap terminals of a discharge lamp can be fitted, said socket housing member including means allowing the insertion of an additional insulating member between the socket terminals or an axial extension thereof.
11. A socket according to Claim 10 wherein said means comprises a slot formed in the socket housing member.
1 2. A socket according to Claim 10 wherein the additional insulating member comprises an extension of the socket housing member extending upwardly between the axial extension of the socket terminals.
13. A socket according to Claim 12 wherein the additional insulating member also extends laterally at the socket terminals.
1 4. A combination lamp and socket substantially as herein described and as illustrated in Figures 1 to 6 or 7 of the accompanying drawings.
1 5. A discharge lamp substantially as herein described and as illustrated in Figures 1, 3, 4 and 6 or Figure 7 of the accompanying drawings.
1 6. A socket for a discharge lamp substantially as herein described and as illustrated in Figures 2, 5 and 6 or Figure 7 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8216374A GB2100404B (en) | 1981-06-12 | 1982-06-04 | Discharge lamps-combined lamp and socket |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8118167 | 1981-06-12 | ||
| GB8216374A GB2100404B (en) | 1981-06-12 | 1982-06-04 | Discharge lamps-combined lamp and socket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2100404A true GB2100404A (en) | 1982-12-22 |
| GB2100404B GB2100404B (en) | 1985-02-13 |
Family
ID=26279775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8216374A Expired GB2100404B (en) | 1981-06-12 | 1982-06-04 | Discharge lamps-combined lamp and socket |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2100404B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110054A1 (en) * | 1982-10-01 | 1984-06-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp with a socket and fitting holder |
| WO1986004458A1 (en) * | 1985-01-15 | 1986-07-31 | Ingo Maurer | Lamp socket |
| EP0272600A3 (en) * | 1986-12-23 | 1989-10-11 | Abb Ceag Licht- Und Stromversorgungstechnik Gmbh | Explosion-proof light fixture |
| EP0455295A1 (en) * | 1990-05-01 | 1991-11-06 | Koninklijke Philips Electronics N.V. | High-pressure discharge lamp |
| FR2665023A1 (en) * | 1990-07-20 | 1992-01-24 | Koito Mfg Co Ltd | Discharge lamp and its method of assembly |
| EP0469408A3 (en) * | 1990-08-02 | 1992-03-11 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
| EP0478077A1 (en) * | 1990-09-28 | 1992-04-01 | Koninklijke Philips Electronics N.V. | Lampholder for a high-pressure gas discharge lamp |
| US5422535A (en) * | 1992-10-12 | 1995-06-06 | U.S. Philips Corporation | Capped electric lamp |
| US5541472A (en) * | 1992-04-23 | 1996-07-30 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-power, single-ended, high-pressure discharge lamp with hot-starting capability |
| GB2362516A (en) * | 2000-05-17 | 2001-11-21 | Yazaki Corp | Leak preventing coupling |
| CN106449353A (en) * | 2016-11-09 | 2017-02-22 | 宁波亚茂光电股份有限公司 | Single-ended ceramic metal halide lamp arc tube |
-
1982
- 1982-06-04 GB GB8216374A patent/GB2100404B/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110054A1 (en) * | 1982-10-01 | 1984-06-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp with a socket and fitting holder |
| WO1986004458A1 (en) * | 1985-01-15 | 1986-07-31 | Ingo Maurer | Lamp socket |
| EP0272600A3 (en) * | 1986-12-23 | 1989-10-11 | Abb Ceag Licht- Und Stromversorgungstechnik Gmbh | Explosion-proof light fixture |
| EP0455295A1 (en) * | 1990-05-01 | 1991-11-06 | Koninklijke Philips Electronics N.V. | High-pressure discharge lamp |
| FR2665023A1 (en) * | 1990-07-20 | 1992-01-24 | Koito Mfg Co Ltd | Discharge lamp and its method of assembly |
| US5144192A (en) * | 1990-08-02 | 1992-09-01 | Patent Treuhand Gesellschaft Fur Elektrische Glunlampen M.B.H. | High-pressure discharge lamp |
| EP0469408A3 (en) * | 1990-08-02 | 1992-03-11 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-pressure discharge lamp |
| EP0478077A1 (en) * | 1990-09-28 | 1992-04-01 | Koninklijke Philips Electronics N.V. | Lampholder for a high-pressure gas discharge lamp |
| US5207600A (en) * | 1990-09-28 | 1993-05-04 | U.S. Philips Corporation | Lampholder for a high-pressure gas discharge lamp |
| US5541472A (en) * | 1992-04-23 | 1996-07-30 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | High-power, single-ended, high-pressure discharge lamp with hot-starting capability |
| US5422535A (en) * | 1992-10-12 | 1995-06-06 | U.S. Philips Corporation | Capped electric lamp |
| GB2362516A (en) * | 2000-05-17 | 2001-11-21 | Yazaki Corp | Leak preventing coupling |
| GB2362516B (en) * | 2000-05-17 | 2002-08-21 | Yazaki Corp | Connector connection structure |
| US6511352B2 (en) | 2000-05-17 | 2003-01-28 | Yazaki Corporation | Connector connection structure |
| CN106449353A (en) * | 2016-11-09 | 2017-02-22 | 宁波亚茂光电股份有限公司 | Single-ended ceramic metal halide lamp arc tube |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2100404B (en) | 1985-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 20020603 |