GB2092831A - Ballasts for Gas Discharge Lamps, and a Lighting Unit with a Ballast and at Least One High Pressure Gas Discharge Lamp - Google Patents
Ballasts for Gas Discharge Lamps, and a Lighting Unit with a Ballast and at Least One High Pressure Gas Discharge Lamp Download PDFInfo
- Publication number
- GB2092831A GB2092831A GB8200048A GB8200048A GB2092831A GB 2092831 A GB2092831 A GB 2092831A GB 8200048 A GB8200048 A GB 8200048A GB 8200048 A GB8200048 A GB 8200048A GB 2092831 A GB2092831 A GB 2092831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- gas discharge
- unit
- impedance
- unit according
- 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- Withdrawn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
- 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
- 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
Abstract
A ballast or impedance unit 7 for gas discharge lamps, particularly high pressure gas discharge lamps containing a gas discharge vessel (4) arranged inside the hermetically sealed evacuated or gas-filled interior of a light-transmitting outer glass bulb (1) includes at least one current- limiting element. The impedance unit (7) is a rotationally symmetrical body, preferably annular or cup-shaped. It has an internal annular bore for embracing and closely fitting to the neck (6) of the bulb (1). The impedance unit (7) may be separate, or it may be an inseparable integral component of the gas discharge lamp and is therefore very advantageous for creating compact light sources, particularly high pressure sodium vapour lamps which can replace the general lighting service incandescent lamps of 40-100 W without changing the light fitting or lamp- holder in an easy and energy saving manner. <IMAGE>
Description
SPECIFICATION
Ballasts for Gas Discharge Lamps, and a
Lighting Unit with a Ballast and at least One
High Pressure Gas Discharge Lamp
The invention concerns a ballast or currentlimiting impedance arrangement for gas discharge lamps, particularly high pressure gas discharge lamps comprising a gas discharge vessel arranged in an evacuated or gas-filled light-transmitting glass bulb hermetically sealed from the environment, wherein the arrangement contains at least one element or circuit for limiting or setting the upper value of the operational current, and in certain cases for supplying ignition pulses while in certain other cases containing elements that are necessary or advantageous for the operation of the lamps, thus e.g. sensing and/or switching elements.The invention also concerns complex lighting units comprising such a ballast or impedance arrangement and at least one high pressure gas discharge lamp, particularly a mercury vapour, metal halide or sodium vapour lamp, but in certain cases an incandescent coil is additionally arranged in the hermetically sealed glass bulb containing the discharge tube of the high pressure gas discharge lamp.
It is known that particularly with the view to saving energy, increasing efforts are made to replace general lighting service (GLS) incandescent lamps by gas discharge lamps of increased luminous efficiency. The best known gas discharge lamps are the fluorescent tube (low pressure mercury vapour lamp), the high pressure mercury vapour lamp, the metal-halide lamp, the sodium vapour lamp etc., the luminous efficiency of which is a multiple of the efficiency of incandescent lamps.Efforts to replace the incandescent lamps by gas discharge lamps recently gained a new impetus by the recognition of the fact that we have found it possible to massproduce, i.e. solved the problems of massproducing, the high pressure sodium vapour lamps in households, and with dimensions, construction, colour rendition and other optical properties very similar to those of household lamps possible, while self-evidently having appreciably reduced power consumption. These solutions and the associated discoveries are described and claimed in Hungarian patent applications Nos. 75/81 and 76/81, respectively corresponding to British Patent Applications Nos.
8200045 and 8200046. These Patent
Specifications are regarded as direct antecedents of the present patent application, and since frequent references will be made to them, they ought to be considered as integral parts of the present patent application.
It is also known that the operation of gas discharge lamps always requires some kind of current-limiting device, the so-called ballast or "impedance unit" of which the most widely applied form is an alternative current reactance electrically connected in series to the gas discharge lamps. The most frequently used form of this impedance is a coil with iron core (choke coil), which behaves like an inductive impedance and is arranged separately from the lamp in the form of a lighting fixture, which may also comprise a lamp holder that can be mechanically and electrically connected to the lamp and other accessories, e.g. a glow-starter, mirror, shield, etc., necessary or advantageous for the expedient use of gas discharge lamps.
In order to replace the generally used incandescent lamps in a simple and economic way it has proved necessary to develop impedance arrangements, or combinations of such arrangements with gas discharge lamps that can be fitted without extra measures into most existing lamp holders or fittings of incandescent lamps.
According to one such solution, fluorescent tubes of low wattage are "folded up" into a compact form and assembled together with an iron core inductive impedance and this combination is provided with the standard screwcap of incandescent lamps, or with caps that are readily interchangeable with such standard lamp caps, whereby this combined unit is in principle suitable for fitting into the lamp sockets of incandescent lamps and intermediate operation.
However, the weight and dimensions of these known light sources are a multiple of the weight and dimensions of the incandescent lamps, their price is high, often they cannot be accommodated in the lighting fittings of incandescent lamps and their light, light distribution and optical behaviour are also different. A further disadvantage is that due to their low power factor they increase the reactive idle current consumption of the national grid.
An aim of the invention is to provide an impedance arrangement or ballast, and a complex lighting unit incorporating it, which unit comprises a high pressure gas discharge lamp, the overall dimensions and weight of which are scarcely different from the corresponding parameters of an incandescent lamp it is desired to replace and, at the same time, structurally as well as optically the unit is extremely closed to the traditional general lighting service lamps, maintaining and preserving the above-mentioned considerable advantages of the gas discharge lamps, particularly their substantially lower energy consumption and higher light output. An additional aim of the invention is to develop lighting units which at least do not increase, but in some cases may reduce, the reactive, idle current consumption of the national grid.
According to the invention this objective is sought to be achieved by the development and application of a lighting unit, wherein the impedance or ballast arrangement is essentially annular or cup-shaped body, or is shaped as any body of rotation, the body having cylindrical internal through-going aperture and fittingly encompassing at least the neck part of the outer envelope of the gas discharge lamp, the envelope being essentially identically shaped with the glass bulb of incandescent lamps.This basic idea of the invention was inspired on the one hand by the analogy with the arrangement of deflector coils specially for television picture tubes and generally for cathode-ray-tubes, and on the other hand by the recognition of the fact that an axially symmetrically internal throughgoing bore, in this case accommodating the neck of the bulb, of any body of rotation causes only minimum loss in the volume of the bulb available to receive parts of the lighting unit and at the same time is very suitable for reducing the overall dimensions of the complex lighting unit by virtue of its incorporation in the neck of the lamp, with negligible effect on the total light emission.In addition, the structural elements of the impedance or ballast arrangement can be placed in regions of the available space, where they cause no interference and which space could not, in any case, be utilised for other purposes. If therefore the impedance arrangement is integrated with the gas discharge lamp so as to form an indivisible single lighting unit, replaceable as a unit, then advantageously the impedance or ballast arrangement may be rigidly and inseparably fixed to the neck part of the gas discharge lamp and/or the lamp cap by cementing or any other way and the necessary electrical connections are also arranged inside the lighting unit. It is, however, also possible to develop lighting units wherein the gas discharge lamp and the impedance arrangement are separable and independently replaceable.In such cases it is expedient and safer from the point of view of usage of laymen, if the mains-side terminals of the rotationally symmetrical impedance unit to be connected to standard lamp-holders, fittings or to standard (expediently, screw-threaded) lamp caps interchangeably fitted into the lamp sockets or lighting fittings while the terminals connecting the impedance unit to the gas discharge lamps are fitted with special separable mechanical and electrical coupling elements which are interchangeable and reliably ensure good mechanical and electrical connections but which can be connected only with each other.
When first equipping new buildings or plants with lighting or in the case of a complete lighting refit, it may be advantageous to use an impedance or ballast arrangement according to the invention wherein the impedance unit is a rotationally symmetrical, annular or cup-shaped appendage or extension of the lighting fixture snugly fitting to the neck of and accommodating the gas discharge lamp and its lamp-side terminals are expediently connected to a standard lamp holder.
The impedance arrangement according to the invention may contain a capacitor and/or inductor as a current limiter wherein the capacitor is expendiently a coil capacitor while the inductor is a toroidal coil or a polygonal iron core. It may, however, be readily understood that the arrangement may favourably comprise a semiconductor current-limiting element, and in given cases, a unit for supplying ignition (starting) impulses, preferably a high frequency converter.
The impedance arrangement is advantageously applicable for high pressure mercury vapour lamps of relatively low wattage, metal halide lamps or particularly for high pressure sodium vapour lamps described in the above-mentioned co-pending patent applications, which are very similar to general lighting service incandescent lamps in terms of their shape and components. In every case, it has proved useful to provide a structural element for reducing the heat transfer from the neck-part of the gas discharge lamp to the surrounding impedance arrangement. This may be achieved most simply by providing at least the neck part of the outer bulb with a selective radiation-transmissive coating, e.g. a heat-reflecting coating, most expediently a heat and light-reflecting mirror coating.
The impedance arrangement according t6 the invention may also be favourably applied in cases where so-called "mixed light" type light sources are used, wherein the outer bulb of the gas discharge lamp also contains an incandescent filament arranged in the evacuated or gas-filled interior of the bulb. In such cases the impedance arrangement may also comprise a control circuit, for instance including sensing and/or switching elements for the co-ordination of the complementary operation of the gas discharge lamp and the incandescent filament.
The invention is further described, purely by way of example, with reference to preferred embodiments illustrated in the accompanying schematic drawings, wherein:
Figure 1 is a greatly simplified diagrammatic line section (partly in elevation) of a lighting unit formed by a high pressure sodium vapour lamp with an impedance or ballast arrangement according to a first preferred embodiment of the invention;
Figure 2 is a view similar to Figure 1 but showing a second preferred embodiment;
Figure 3 is a diagrammatic outline drawing of a third preferred embodiment according to the invention, wherein the impedance or ballast and the only partially shown light fitting form an integral, undivided unit; and
Figure 4 is a diagrammatic view of another embodiment according to the invention, comprising an impedance unit with a standard incandescent lamp cap into which is readily exchangeably fitted a gas discharge lamp provided with a special pin-type cap adaptor.
Figure 1 illustrates a lighting unit with an impedance or ballast arrangement according to the invention, wherein a gas discharge lamp, in the narrow sense of that term, essentially consists of a glass bulb 1, a lamp stem 2, a screw-type (Edison) standard lamp cap 3 and a discharge vessel 4 which latter, in this embodiment, is the discharge vessel of a high pressure sodium vapour lamp. These components are known per se and their combination is described in
Hungarian patent application No. 75/81, corresponding to British patent application No.
8200045. The bulb 1 is mushroom-shaped and corresponds to the shape of the bulb of a krypton gas-filled general lighting service incandescent lamp marketed under the trade name "TUNGSRAM". The neck 6 of the glass bulb 1 is in this case regarded as the region which extends upwardly from the hermetic seal 5 to the flare of the stem 3, i.e. where the bulb 1 widens out. In this embodiment the neck 6 of the bulb 1 is essentially cylindrical.
According to the invention, the rotationally symmetrically shaped ballast or impedance unit 7 provided with an internal throughgoing aperture is secursd to the neck 6 by a layer 8 of adhesive or cement. In this embodiment the unit 7 contains a coiled capacitor. The current lead-in wires of the electrodes of the gas discharge vessel 4 are welded to supports 9 and 10 hermetically sealed into the lamp stem 2. A plate-like widened flange of a slightly modified, but essentially standard screw-cap 3 is connected and secured to the lower part of the unit 7. The support 9 is connected to one of the contacts of the lamp cap 3, while the support 10 is electrically connected to one of the electrodes of the coiled capacitor.
The other electrode ('plate') of the coiled capacitor is electrically connected by an outgoing wire 11 to the flange of the lamp cap 3, thus producing a series connection between the discharge vessel 4 and the coiled capacitor of the unit 7. It may clearly be seen from Figure 1 that this impedance unit 7 according to the invention does not increase the overall length of the lamp.
The impedance unit 7 is fixed to the neck 6, which is expediently mirror-coated, and is thus practically concealed beneath the dome-shaped bulge of the glass bulb 1. In many cases it may be achieved that the outer diameter of the impedance unit 7 including the capacitor does not exceed that the maximum diameter of the bulb.
Advantages of the unit 7 including the capacitor include its small weight and that lamps with such capacitative impedance improve the power factor of the national grid. Despite this, the impedance unit 7 according to the invention may comprise an inductor, e.g. an annular coil with an iron core or its combination with a capacitor. The impedance unit 7 may also include an electronic one, expecially one including a high frequency converter with semiconductor elements.It may also be favourable in certain cases of application
if the lighting unit according to the invention is developed in the form of a so-called "mixed light" light source wherein either in a separate or in a common space is arranged an incandescent coil used together with the gas discharge vessel of a gas discharge lamp, the coil being arranged either in a common space (bulb interior) with or in a different one from the gas discharge vessel. In such cases it may be necessary to harmonize the operation of these two light sources in some suitable manner for which purpose the impedance unit according to the invention may also include a suitable circuitry containing e.g. sensing and/or switching elements.
The description given above are all valid for the embodiments of the invention about to be described, wherein structural elements of identical function are always designated by the same reference numbers in the accompanying drawings. The embodiments illustrated in Figures 2 to 4 differ from one another essentially in respect of the arrangement and construction of the impedance unit as well as in the various methods of connection of the gas discharge lampimpedance unit combination to one another and to the lamp holder or fitting receiving them.
Figure 2 illustrates a lighting unit wherein a discharge vessel 4 of a sodium vapour lamp is mounted within a dome like glass bulb 1 with a so-called axial mounting i.e. coaxially with the longitudinal axis of the bulb 1, the discharge vessel 4 being fixed to supports 9, 10; in other respects the lighting unit is very similar to the embodiment shown in Figure 1. In the embodiment according to Figure 2 the internally apertured impedance 7 fits only partially to the cylindrical neck 6 of the glass bulb 1 because the neck is shorter and therefore the overall length of this lighting unit is longer than in the embodiment according to Figure 1.
In the embodiment of the impedance unit 7 according to the invention shown in Figure 3, the unit surrounds the neck 6 of the glass bulb 1 which is a cup-shaped solid of rotational symmetry. There is no rigidly fixed connection between the unit and the bulb, here the impedance unit 7 is only a structural element fixed to the partially and highly diagrammatically illustrated lamp fitting 1 6 or to an indivisible, integral part of it.
Figure 4 shows an embodiment of the invention wherein the cup-shaped rotationally symmetrically shaped impedance unit 7 is provided with a screw-type lamp cap that can be screwed into the standard lamp socket of the traditional incandescent lamps in which a special bipin-type cap 12, 13 is housed to accommodate and connect to the gas discharge lamps and is provided with bores 14, 1 5 for the lamp-side electrical connections.
impedances of higher rating, or more complicated and in certain cases multi-functional connection arrangements containing impedance units 7 are particularly economically and favourably applied with the aid of this embodiment, which also ensures a safer, simpler ("fool-proof") connection for a layman, and operation of the combination of lamp-impedance unit lamp-holder, while fully preserving all advantages of the arrangement of the impedance unit according to the invention.
The field of protection defined in the claims is naturally not restricted to the embodiments described purely by way of example and illustrated in the accompanying drawings. Many other expedient and favourable embodiments of the impedance unit according to the invention may be realised in respect of form and design.
Claims (16)
1. An impedance or ballast unit for gas discharge lamps, particularly high pressure gas discharge lamps comprising a gas discharge vessel arranged inside a hermetically sealed, evacuated or gas-filled light-transmitting envelope, said unit comprising at least one current-limiting element or unit, but in certain cases also including ignition-impulse supplying or other structural elements necessary or favourable for the operating of the lamp or otherwise advantageous elements such as sensing and/or switching elements, wherein the said unit is internally apertured, rotationally symmetrical annular or cup-shaped body at least partially surrounding and fitting to the neck of the said envelope.
2. A unit according to claim 1 wherein the unit is rigidly fixed to the neck of the said envelope of a gas discharge lamp and/or to the lamp cap.
3. A unit according to claim 1 or 2, wherein the unit is fixed to the neck of the said evelope of a gas discharge lamp and/or to the lamp cap by electrically and mechanically releasable connection.
4. A unit according to claim 3 wherein the mains input terminals of said unit are connected to a lamp cap which is connectible to standard lamp sockets, or to fittings interchangeably connectible to the standard lamp sockets.
5. A unit according to any preceding claim wherein the unit is developed as a rotationally symmetrical, annular or cup-like extension of the lamp fitting or lamp holder surrounding the neck of-a gas discharge lamp.
6. A unit according to claim 5, wherein the lamp-side output terminals of the impedance unit are connected to the contacts of a standard lamp holder.
7. A unit according to any preceding claim, wherein the unit contains a capacitor and/or an inductor.
8. A unit according to claim 7, wherein the capacitor is a coiled condenser.
9. A unit according to claim 7 or 8, wherein the inductor is a toroidal or a polygonal coil with an iron core.
1 0. A unit according to any preceding claim wherein the unit includes a current limiter, expediently suitable semi-conductor current limiting element(s) and optionally also a supply unit for supplying ignition inpulse(s), particularly a high frequency converter.
1 A gas discharge lighting unit including impedance unit according to any preceding claim, wherein the gas discharge lamp is a high pressure mercury vapour lamp, a metal halide lamp or a sodium vapour lamp.
12. A lighting unit according to claim 11, wherein at least the neck of the gas discharge lamp that is fittingly encompassed by the impedance unit is provided with a structural element reducing heat transfer towards the impedance unit positioned between the cylindrical inner aperture of the impedance unit and the neck of the envelope of the gas discharge lamp.
13. A lighting unit according to claim 12, wherein the heat transfer-reducing structural element consists of a selective radiation transmitting layer, particularly a heat and light reflector mirror-coating provided on at least the neck of the gas discharge lamp.
1 4. A lighting unit according to any of claims 11 to 13, wherein the unit also includes an incandescent lamp or a so-called "mixed light" light source provided with an incandescent coil arranged in the evacuated or gas-filled interior of the outer envelope of the gas discharge lamp.
1 5. A lighting unit according to claim 14, wherein the impedance unit contains control circuitry to co-ordinate and mutually supplement the operational states of the gas discharge lamp and the incandescent coil or filament of the incandescent lamp.
16. An impedance unit, or a lighting unit incorporating it, substantially as herein described with reference to and as shown in any of the
Figures of the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU81287A HU183312B (en) | 1981-02-06 | 1981-02-06 | Additional series arrangement for gas-discharge lamps, furthermore lighting unit with additional series arrangement and at least one high-pressure gas-discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2092831A true GB2092831A (en) | 1982-08-18 |
Family
ID=10948918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8200048A Withdrawn GB2092831A (en) | 1981-02-06 | 1982-01-04 | Ballasts for Gas Discharge Lamps, and a Lighting Unit with a Ballast and at Least One High Pressure Gas Discharge Lamp |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS57147805A (en) |
| AU (1) | AU7948882A (en) |
| BE (1) | BE891994A (en) |
| DD (1) | DD202480A5 (en) |
| DE (1) | DE3204282A1 (en) |
| ES (1) | ES8303818A1 (en) |
| FR (1) | FR2499765A1 (en) |
| GB (1) | GB2092831A (en) |
| HU (1) | HU183312B (en) |
| IT (1) | IT8247666A0 (en) |
| NL (1) | NL8200429A (en) |
| RO (1) | RO84269B (en) |
| SE (1) | SE8200076L (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0187493A2 (en) * | 1984-12-13 | 1986-07-16 | East Rock Technology Inc. | Toroidal ballast lighting fixture |
| EP0191742A2 (en) * | 1985-02-12 | 1986-08-20 | Lumalampan Aktiebolag | An arrangement in electric discharge lamps |
| US4751435A (en) * | 1984-12-13 | 1988-06-14 | Gte Laboratories Incorporated | Dual cathode beam mode fluorescent lamp with capacitive ballast |
| EP0694952A2 (en) * | 1994-07-30 | 1996-01-31 | Schiller, Christa | Compact fluorescent lamp with incandescent lamp socket, in particular with socket thread of the E27 or E14 type |
| WO2008113409A1 (en) * | 2007-03-19 | 2008-09-25 | Osram Gesellschaft mit beschränkter Haftung | Electric lamp comprising a light bulb that can be displaced in relation to the lower part |
| CN104235656A (en) * | 2014-10-11 | 2014-12-24 | 康栖诚 | Multifunctional ball-shaped bulb |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3312993C2 (en) * | 1983-04-12 | 1985-05-09 | Schwabe GmbH & Co KG Elektrotechnische Fabrik, 7067 Urbach | Ballast choke or transformer, in particular ballast for gas discharge lamps |
| CA1267188A (en) * | 1984-08-24 | 1990-03-27 | John A. Scholz | Metal vapor lamp having low starting voltage |
| DE29505319U1 (en) * | 1995-03-29 | 1996-01-18 | Lichttechnik Reichardt | Instant re-ignition lamp |
| CN106090660A (en) * | 2016-06-20 | 2016-11-09 | 许昌虹榕节能电器设备有限公司 | A kind of filament of electricity-saving lamp |
-
1981
- 1981-02-06 HU HU81287A patent/HU183312B/en unknown
-
1982
- 1982-01-04 GB GB8200048A patent/GB2092831A/en not_active Withdrawn
- 1982-01-08 SE SE8200076A patent/SE8200076L/en not_active Application Discontinuation
- 1982-01-13 AU AU79488/82A patent/AU7948882A/en not_active Abandoned
- 1982-01-25 DD DD82236946A patent/DD202480A5/en unknown
- 1982-01-28 IT IT8247666A patent/IT8247666A0/en unknown
- 1982-01-30 JP JP57012577A patent/JPS57147805A/en active Pending
- 1982-02-02 ES ES509256A patent/ES8303818A1/en not_active Expired
- 1982-02-02 BE BE0/207209A patent/BE891994A/en not_active IP Right Cessation
- 1982-02-04 RO RO106529A patent/RO84269B/en unknown
- 1982-02-04 NL NL8200429A patent/NL8200429A/en not_active Application Discontinuation
- 1982-02-05 FR FR8201923A patent/FR2499765A1/en not_active Withdrawn
- 1982-02-05 DE DE19823204282 patent/DE3204282A1/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0187493A2 (en) * | 1984-12-13 | 1986-07-16 | East Rock Technology Inc. | Toroidal ballast lighting fixture |
| US4751435A (en) * | 1984-12-13 | 1988-06-14 | Gte Laboratories Incorporated | Dual cathode beam mode fluorescent lamp with capacitive ballast |
| EP0187493A3 (en) * | 1984-12-13 | 1988-11-09 | East Rock Technology Inc. | Toroidal ballast lighting fixture |
| EP0191742A2 (en) * | 1985-02-12 | 1986-08-20 | Lumalampan Aktiebolag | An arrangement in electric discharge lamps |
| EP0191742A3 (en) * | 1985-02-12 | 1988-11-30 | Lumalampan Aktiebolag | An arrangement in electric discharge lamps |
| EP0694952A2 (en) * | 1994-07-30 | 1996-01-31 | Schiller, Christa | Compact fluorescent lamp with incandescent lamp socket, in particular with socket thread of the E27 or E14 type |
| EP0694952A3 (en) * | 1994-07-30 | 1998-03-18 | Schiller, Christa | Compact fluorescent lamp with incandescent lamp socket, in particular with socket thread of the E27 or E14 type |
| WO2008113409A1 (en) * | 2007-03-19 | 2008-09-25 | Osram Gesellschaft mit beschränkter Haftung | Electric lamp comprising a light bulb that can be displaced in relation to the lower part |
| CN104235656A (en) * | 2014-10-11 | 2014-12-24 | 康栖诚 | Multifunctional ball-shaped bulb |
Also Published As
| Publication number | Publication date |
|---|---|
| RO84269B (en) | 1984-07-30 |
| BE891994A (en) | 1982-05-27 |
| ES509256A0 (en) | 1983-02-01 |
| IT8247666A0 (en) | 1982-01-28 |
| JPS57147805A (en) | 1982-09-11 |
| NL8200429A (en) | 1982-09-01 |
| DE3204282A1 (en) | 1982-10-14 |
| HU183312B (en) | 1984-04-28 |
| FR2499765A1 (en) | 1982-08-13 |
| ES8303818A1 (en) | 1983-02-01 |
| DD202480A5 (en) | 1983-09-14 |
| AU7948882A (en) | 1982-09-23 |
| SE8200076L (en) | 1982-08-07 |
| RO84269A (en) | 1984-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4298822A (en) | Folded fluorescent lamp and socket | |
| US6064155A (en) | Compact fluorescent lamp as a retrofit for an incandescent lamp | |
| US4300073A (en) | Screw-in type lighting unit having a convoluted tridimensional fluorescent lamp | |
| EP1107285B1 (en) | High-intensity discharge lamp, system for lighting the lamp and lighting appliance using the lamp | |
| US4717852A (en) | Low-power, high-pressure discharge lamp | |
| US4173730A (en) | Compact fluorescent lamp unit having integral circuit means for DC operation | |
| US4871944A (en) | Compact lighting unit having a convoluted fluorescent lamp with integral mercury-vapor pressure-regulating means, and method of phosphor-coating the convoluted envelope for such a lamp | |
| US6296375B1 (en) | Compact fluorescent lamp having a detachable translucent cover | |
| GB2092831A (en) | Ballasts for Gas Discharge Lamps, and a Lighting Unit with a Ballast and at Least One High Pressure Gas Discharge Lamp | |
| US20050275351A1 (en) | Gas discharge fluorescent device with lamp support | |
| US4475064A (en) | Means for controlling lumen output in power consumption of phosphor excitable lamps | |
| US4348612A (en) | Compact fluorescent lamp unit for three-way fluorescent lamp fixture | |
| US2457503A (en) | Reflecting vapor lamp | |
| US4288725A (en) | Lightweight fluorescent lamp ballast | |
| US4833574A (en) | Annular fluorescent lamp | |
| CA2096073C (en) | Low-pressure discharge lamp, particularly compact fluorescent lamp, especially for outdoor and indoor use | |
| US4740873A (en) | Energy saving "U" shaped fluorescent lamp | |
| US4636691A (en) | Arrangement including a metal vapor discharge tube provided with at least two internal electrodes | |
| US4317069A (en) | Means and method for controlling lumen output and power consumption of phosphor excitable lamps | |
| US4032814A (en) | Fluorescent lamp with reduced wattage consumption | |
| EP0601893B1 (en) | Fluorescent lamp | |
| GB2115977A (en) | High efficacy fluorescent/arc discharge light source | |
| US4935664A (en) | Diffuse discharge lamp | |
| Preston et al. | Metal halide lamps | |
| KR200230709Y1 (en) | Cold cathod type fluorescent lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |