GB2039141A - Gas discharge lamp - Google Patents
Gas discharge lamp Download PDFInfo
- Publication number
- GB2039141A GB2039141A GB7942722A GB7942722A GB2039141A GB 2039141 A GB2039141 A GB 2039141A GB 7942722 A GB7942722 A GB 7942722A GB 7942722 A GB7942722 A GB 7942722A GB 2039141 A GB2039141 A GB 2039141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- resistor
- glow
- foil
- lamps
- 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
- 239000011888 foil Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000011521 glass Substances 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 2
- 229910052753 mercury Inorganic materials 0.000 claims description 2
- 229910052754 neon Inorganic materials 0.000 claims description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 230000003019 stabilising effect Effects 0.000 claims description 2
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
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
In place of a usual carbon film resistor in the tube base, used as a limiting resistor, a gas discharge lamp (particularly a glow lamp) is provided with a foil resistor 4 in series with the lamp and which partially surrounds the outer surface of the lamp body 1. The foil resistor preferably has a reflective surface which faces the lamp body and which may be coated with luminescent material. <IMAGE>
Description
SPECIFICATION
Gas discharge lamp
The invention relates to gas discharge lamps, and in particular to glow lamps.
Glow lamps are gas discharge lamps which have a cold cathode and a small spacing between the electrodes. Only the negative glow discharge which covers the cathode as a luminous layer when an appropriate gas pressure is used, is made use of in the production of light.
Glow lamps of small capacity, so-called miniature glow lamps, are used for emergency lighting and also as voltage indicators in equipment and control panels. They are also used as pilot lights, indicators for different types of current and current directions, for tuning radios, in facsimile telegraphy, in television, and so on. A high resistance is usually mounted in the lamp base for stabilising the discharge and for limiting the current.
In view of the increasing miniaturization of components, great efforts have also been made to produce glow lamps which are as small as possible. Hitherto, however, development in this direction has been hindered by the limiting resistor which is usually a film resistor which is welded to a connecting wire of the glow lamp for example, and thus increases the overall height of the lamp considerably.
It is an object of the present invention to provide a glow lamp having a series resistor, which, when installed, increases the overall height and volume of the lamp to only a small extent and which is simple to instal.
According to the invention, there is provided a gas discharge lamp, having a limiting resistor connected in series therewith, said resistor being in the form of a foil resistor partially surrounding the outer surface of the lamp body. With such an arrangement, the overall height of the glow lamp with the resistor installed is practically the same as the height of the lamp itself.
As opposed to a film resistor, a foil resistor consists of a resistive film made, for example, of carbon, platinum or a nickel-chromium alloy, which is vapour-deposited, sprayed or sublimed onto the surface of a foil made of electrically insulating material. The film can alternatively consist of a semiconductor or a semiconductor alloy.
When the film has a reflective surface, the foil resistor carrying the film is preferably in contact with the body of the lamp. In this way the foil of the resistor simultaneously serves as a reflector for the light produced, so that the light intensity is thereby increased.
The surface of the foil resistor which faces towards the interior of the body of the lamp may be provided with luminescent material. In this way, the ultra-violet resonance radiation of the neon or mercury used as the lowpressure gas in the lamp, can be made use of, so that the luminous efficiency can be increased and the colour of the light can be changed.
The invention will now be further described with reference to the drawing, in which:
Figure 1 is a schematic side view of a glow lamp according to the invention; and
Figure 2 is a schematic plan view of the glow lamp of Fig. 1.
Referring to the drawing, a glow lamp according to the invention has a glass body 1 with two terminals 2 and 3 between which a voltage source U is connected. A foil resistor 4 partially surrounds the body of the glow lamp. The resistor 4 has a reflective surface 6 which is arranged to face towards the glass body 2 of the lamp.
A lateral light outlet (through the surface of the casing) is often used in glow lamps, and the arrangement in accordance with the invention is particularly advantageous in such cases. However, the invention is not limited to any specific formation of electrode surfaces, but can be used for gas discharge lamps in general, and in particular glow lamps.
1. A has discharge lamp having a limiting resistor connected in series therewith, said resistor being in the form of a foil resistor partially surrounding the outer surface of the lamp body.
2. A gas discharge lamp as claimed in
Claim 1, wherein said foil resistor has a reflective surface in contact with the lamp body.
3. A gas discharge lamp as claimed in
Claim 1 or Claim 2, wherein the surface of the foil resistor which faces towards the surface of the lamp body is provided with luminescent material.
4. A glow lamp as claimed in any one of
Claims 1 to 3.
5. A glow lamp substantially as hereinbefore described with reference to and as shown in the drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. A has discharge lamp having a limiting resistor connected in series therewith, said resistor being in the form of a foil resistor partially surrounding the outer surface of the lamp body.
2. A gas discharge lamp as claimed in
Claim 1, wherein said foil resistor has a reflective surface in contact with the lamp body.
3. A gas discharge lamp as claimed in
Claim 1 or Claim 2, wherein the surface of the foil resistor which faces towards the surface of the lamp body is provided with luminescent material.
4. A glow lamp as claimed in any one of
Claims 1 to 3.
5. A glow lamp substantially as hereinbefore described with reference to and as shown in the drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782853567 DE2853567A1 (en) | 1978-12-12 | 1978-12-12 | GAS DISCHARGE LAMP, IN PARTICULAR GLOW LAMP, WITH FILM RESISTANCE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2039141A true GB2039141A (en) | 1980-07-30 |
| GB2039141B GB2039141B (en) | 1982-09-22 |
Family
ID=6056913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7942722A Expired GB2039141B (en) | 1978-12-12 | 1979-12-11 | Gas discharge lamp |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2853567A1 (en) |
| FR (1) | FR2444337A1 (en) |
| GB (1) | GB2039141B (en) |
| IT (1) | IT1127659B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1755144A3 (en) * | 2005-04-19 | 2008-12-03 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Compact reflector lamp and manufacturing method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9411753U1 (en) * | 1994-07-20 | 1994-09-22 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München | Lamp circuit unit |
| DE4425682A1 (en) | 1994-07-20 | 1996-01-25 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Lamp-reflector unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH278968A (en) * | 1949-06-20 | 1951-11-15 | Issaiewitch Rebikoff Dimitri | Watertight housing for flash discharge lamp. |
| FR1204037A (en) * | 1958-04-12 | 1960-01-22 | Improvements to small neon lamps and other rare gases in order to increase their brightness | |
| GB989241A (en) * | 1960-03-04 | 1965-04-14 | Ass Elect Ind | Electric discharge lamps |
-
1978
- 1978-12-12 DE DE19782853567 patent/DE2853567A1/en not_active Withdrawn
-
1979
- 1979-11-29 IT IT27676/79A patent/IT1127659B/en active
- 1979-12-11 FR FR7930325A patent/FR2444337A1/en active Pending
- 1979-12-11 GB GB7942722A patent/GB2039141B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1755144A3 (en) * | 2005-04-19 | 2008-12-03 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Compact reflector lamp and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| IT7927676A0 (en) | 1979-11-29 |
| GB2039141B (en) | 1982-09-22 |
| IT1127659B (en) | 1986-05-21 |
| FR2444337A1 (en) | 1980-07-11 |
| DE2853567A1 (en) | 1980-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |