CA2033601A1 - Discharge tube and method of manufacturing same - Google Patents
Discharge tube and method of manufacturing sameInfo
- Publication number
- CA2033601A1 CA2033601A1 CA 2033601 CA2033601A CA2033601A1 CA 2033601 A1 CA2033601 A1 CA 2033601A1 CA 2033601 CA2033601 CA 2033601 CA 2033601 A CA2033601 A CA 2033601A CA 2033601 A1 CA2033601 A1 CA 2033601A1
- Authority
- CA
- Canada
- Prior art keywords
- discharge tube
- electrodes
- discharge
- cylindrical cover
- alkaline earth
- 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.)
- Abandoned
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A discharge tube has an activated layer, made of one of an alkali metal compound or an alkaline earth metal compound, formed on a surface other than a dis-charge surface of one of a pair of opposed electrodes in the tube. The electrodes are hermetically sealed to a cylindrical cover, and a gas, preferably an inert gas such as argon, fills the hermetically-sealed enclosure.
A discharge tube has an activated layer, made of one of an alkali metal compound or an alkaline earth metal compound, formed on a surface other than a dis-charge surface of one of a pair of opposed electrodes in the tube. The electrodes are hermetically sealed to a cylindrical cover, and a gas, preferably an inert gas such as argon, fills the hermetically-sealed enclosure.
Description
~ 20336~1 DISCHARGE TUBE AND METHOD OF MANUFACTURING SAME
BACRGR UND OP THE INVENTION
The present invention relates to a discharge tube for voltage control, and more particularly to a gas-filled discharge tube for the series gap of an igniter for the engine of a motor vehicle or the like.
In a conventional igniter for the engine of a motor vehicle or the like, a high voltage is applied to a spark plug to generate a spark. The igniter has a series gap, which is a discharge gap provided in series with the spark plug, to prevent the improper generation of the spark so that the time of the ignition of the engine is controlled precisely. The series gap is constituted by a discharge tube, which includes a cylin-der and discharge electrodes provided at the both ends of the cylinder, and is filled with inert gas.
To use the discharge tube so that the time of the ignition by the spark plug is controlled precisely, the starting voltagè of the discharge tube needs to be -; somewhat higher than that of the plug, or higher than about 10 kV. However, if the distance between the electrodes of the discharge tube is increased to ; heighten the discharge start voltage thereof, the discharge keeping voltage thereof also is heightened.
In that case, the loss in energy to be applied to the spark plug is increasèd to lower the sureness of the ignition by the spark plug, and therefore a more powerful high voltage supply unit is needed. This is a drawback.
To avoid heightening the maintaining voltage, a discharge tube shown in ~ig. 4 was proposed, in which an activated layer 6 coated with an oxide of an alkali .,' ~'., "; :~."
.::
metal or an oxide of an alkaline earth metal is formed on the discharge surface of the tip of an electrode 2.
When the discharge tube having the activated layer on the discharge surface of the electrode is used for an arrester or the like so that the frequency of occurrence of the discharge in the tube encounters no difficulty in operation. However, when the discharge tube is used to constitute the series gap of an igniter for the engine of a motor vehicle or the like, the activated layer becomes worn with time, so that the maintaining voltage thereof rises gradually, also presenting a problem.
SUMM~RY OF TIIE INVENTION
The present invention was made in order to solve the above-mentioned problem of durability. Accordingly, it is an object of the present invention to provide a discharge tube which has a low and stable maintaining voltage and which is high in reliability.
The discharge tube is gas-filled, and has a pair of electrodes provided in an electrically insulating cylinder and opposed to each other. The discharge tube is characterized in that an activated layer containing an oxide of an alkali metal or an oxide of an alkaline earth metal is provided on at least part of a surface, which is a portion of the tube other than the discharge surface of each of the electrodes, and is exposed to gas filled in the tube.
To manufacture the discharge tube, a layer contain-ing a compound of the alkali metal or a compound of the alkaline earth metal is ~ormed on at least part of the surface which is the inside surface of the cylinder or the surface of the electrode other than the discharge surface of the electrode and is exposed to the gas filled in the tube. The cylinder and the electrodes ~` ' ,'.
, : . . . . .
~ `~ 2~336~
then are assembled with a bonding agent. The cylinder/
electrode assembly thereafter is heat-treated so that the layer is converted into the activated layer contain-ing the oxide of the alkali metal or the oxide of the alkaline earth metal, and the bonding of the cylinder to the electrodes is completed.
As described above, the activated layer, containing the oxide of the alkali metal or the oxide of the alka-line earth metal and formed on at least part of the surface exposed to the gas filled in the discharge tube, is obtained by heat-treating the layer containing the compound of the alkali metal or the compound of the alkaline earth metal, which is the precursor of the oxide. For example, the compound of the alkali metal is a carbonate of an alkali metal such as lithium, sodium and potassium, an organic acid salt of the metal, or the like; the compound of the alkaline earth metal is a carbonate of an alkaline earth metal such as barium, strontium and calcium, an organic acid salt of the latter metal, or the like. The compound of the alkaline earth metal may be a compound which has been publicly known and used to form an activated layer containing an oxide of an alkaline earth metal. The compound of the ~' alkali metal and that of the alkaline earth metal may be other compounds if they can be easily pyrolyzed to produce oxides.
The activated layer provided on the surface which is not the discharge surface of the electrode and is exposed to the gas filled in the discharge tube provided in accordance with the present invention is bombarded with ions at every discharge in the tube so that partic-les are struck out of the layer and cling to the surface of the cathode of the tube. Even though the particles clinging to the discharge surface are consumed because of the energy of the discharge, other particles are - , .: . .:
~033601 supplied sequentially from the activated layer to the discharge surface. For that reason, even if the starting voltage of the tube is set to be high, the maintaining voltage thereof after the start of the discharge is low. Besides, even if the discharge sur-face of the electrode is damaged somewhat, the discharge voltage of the tube hardly changes. Thus, the dischar-ging properties of the tube are kept very stable.
- BRIEF DESCRIPTION OF THE DRAWINGS
Figs. 1, 2 and 3 are sectional views of discharge tubes which are different case of embodiments of the present invention. Fig. 4 is a sectional view of the discharge tube having an activated layer provided in accordance with conventional practice.
DETAILED DESCRIPTION OF THE PREFERRED EMBODINENTS
The present invention will now be described in more detail with reference to the accompanying drawings.
Fig. 1 shows a discharge tube in accordance with a first embodiment of the present invention. The dis-charge tube includes a cylinder cove~ 1 made of an elec-trically insulating material such as ceramic, and dis-charge electrodes 2 and 3 having nearly flat tip sur-faces, rounded at the peripheries of the surfaces and hermetically secured to the cover 1 by a vitreous or 2S metallic bonding agent 4 or the like. A gas filling hole 3a extends through the discharge electrode 3 and communicates with a gas filling pipe 5. After the discharge electrodes 2`and 3 are hermetically bonded to the cylindrical cover 1 and a gas is introduced into the assembly of the electrodes and the over through the gas filling pipe 5, the pipe is closed hermetically by pressing deformation and fuse-bonding at the same time, or a similar closing procedure. At that time, a solder or the like may be applied to the deformed portion of the gas filling pipe 5 if necessary. A paint manufac-.
. . . -; ~ - ~ . - - .
;, ' ~ , , ', :
, . . . .
. , - - .
`` 2033~Sl tured by suspending a fine powder of barium carbonate and a fine powder of calcium carbonate in water is applied to the side (a) of the inner portion of the discharge electrode 2, dried, and backed at a tempera-ture of about 900C for 30 minutes so that an activated layer 6 was formed on the side of the inner portion of the electrode.
The cylindrical cover 1 and the discharge elec-trodes 2 and 3 are assembled so that the electrodes are placed at a prescribed distance from each other. The bonding agent 4 then is applied to the mutually bonded surfaces of the cover and the electrodes and the paint was applied to the side (a) of the inner portion of the electrode 2. After that, the assembly of the cover 1 lS and the electrodes 2 and 3 was heated so that the acti-vated layer 6 was formed while the bonding agent 4 was fused and conjoined to the cover and the electrodes.
The assembly then had the gas evacuated from it. Argon of about 99.99~ purity thereafter was provided, under pressure, into the assembly, so that the argon was set at prescribed pressure in the assembly. The discharge tube A thus was manufactured.
Fig. 2 shows a discharge tube in accordance with a second embodiment of the present invention. The differ-ence between the discharge tubes represented Figs. 1 and
BACRGR UND OP THE INVENTION
The present invention relates to a discharge tube for voltage control, and more particularly to a gas-filled discharge tube for the series gap of an igniter for the engine of a motor vehicle or the like.
In a conventional igniter for the engine of a motor vehicle or the like, a high voltage is applied to a spark plug to generate a spark. The igniter has a series gap, which is a discharge gap provided in series with the spark plug, to prevent the improper generation of the spark so that the time of the ignition of the engine is controlled precisely. The series gap is constituted by a discharge tube, which includes a cylin-der and discharge electrodes provided at the both ends of the cylinder, and is filled with inert gas.
To use the discharge tube so that the time of the ignition by the spark plug is controlled precisely, the starting voltagè of the discharge tube needs to be -; somewhat higher than that of the plug, or higher than about 10 kV. However, if the distance between the electrodes of the discharge tube is increased to ; heighten the discharge start voltage thereof, the discharge keeping voltage thereof also is heightened.
In that case, the loss in energy to be applied to the spark plug is increasèd to lower the sureness of the ignition by the spark plug, and therefore a more powerful high voltage supply unit is needed. This is a drawback.
To avoid heightening the maintaining voltage, a discharge tube shown in ~ig. 4 was proposed, in which an activated layer 6 coated with an oxide of an alkali .,' ~'., "; :~."
.::
metal or an oxide of an alkaline earth metal is formed on the discharge surface of the tip of an electrode 2.
When the discharge tube having the activated layer on the discharge surface of the electrode is used for an arrester or the like so that the frequency of occurrence of the discharge in the tube encounters no difficulty in operation. However, when the discharge tube is used to constitute the series gap of an igniter for the engine of a motor vehicle or the like, the activated layer becomes worn with time, so that the maintaining voltage thereof rises gradually, also presenting a problem.
SUMM~RY OF TIIE INVENTION
The present invention was made in order to solve the above-mentioned problem of durability. Accordingly, it is an object of the present invention to provide a discharge tube which has a low and stable maintaining voltage and which is high in reliability.
The discharge tube is gas-filled, and has a pair of electrodes provided in an electrically insulating cylinder and opposed to each other. The discharge tube is characterized in that an activated layer containing an oxide of an alkali metal or an oxide of an alkaline earth metal is provided on at least part of a surface, which is a portion of the tube other than the discharge surface of each of the electrodes, and is exposed to gas filled in the tube.
To manufacture the discharge tube, a layer contain-ing a compound of the alkali metal or a compound of the alkaline earth metal is ~ormed on at least part of the surface which is the inside surface of the cylinder or the surface of the electrode other than the discharge surface of the electrode and is exposed to the gas filled in the tube. The cylinder and the electrodes ~` ' ,'.
, : . . . . .
~ `~ 2~336~
then are assembled with a bonding agent. The cylinder/
electrode assembly thereafter is heat-treated so that the layer is converted into the activated layer contain-ing the oxide of the alkali metal or the oxide of the alkaline earth metal, and the bonding of the cylinder to the electrodes is completed.
As described above, the activated layer, containing the oxide of the alkali metal or the oxide of the alka-line earth metal and formed on at least part of the surface exposed to the gas filled in the discharge tube, is obtained by heat-treating the layer containing the compound of the alkali metal or the compound of the alkaline earth metal, which is the precursor of the oxide. For example, the compound of the alkali metal is a carbonate of an alkali metal such as lithium, sodium and potassium, an organic acid salt of the metal, or the like; the compound of the alkaline earth metal is a carbonate of an alkaline earth metal such as barium, strontium and calcium, an organic acid salt of the latter metal, or the like. The compound of the alkaline earth metal may be a compound which has been publicly known and used to form an activated layer containing an oxide of an alkaline earth metal. The compound of the ~' alkali metal and that of the alkaline earth metal may be other compounds if they can be easily pyrolyzed to produce oxides.
The activated layer provided on the surface which is not the discharge surface of the electrode and is exposed to the gas filled in the discharge tube provided in accordance with the present invention is bombarded with ions at every discharge in the tube so that partic-les are struck out of the layer and cling to the surface of the cathode of the tube. Even though the particles clinging to the discharge surface are consumed because of the energy of the discharge, other particles are - , .: . .:
~033601 supplied sequentially from the activated layer to the discharge surface. For that reason, even if the starting voltage of the tube is set to be high, the maintaining voltage thereof after the start of the discharge is low. Besides, even if the discharge sur-face of the electrode is damaged somewhat, the discharge voltage of the tube hardly changes. Thus, the dischar-ging properties of the tube are kept very stable.
- BRIEF DESCRIPTION OF THE DRAWINGS
Figs. 1, 2 and 3 are sectional views of discharge tubes which are different case of embodiments of the present invention. Fig. 4 is a sectional view of the discharge tube having an activated layer provided in accordance with conventional practice.
DETAILED DESCRIPTION OF THE PREFERRED EMBODINENTS
The present invention will now be described in more detail with reference to the accompanying drawings.
Fig. 1 shows a discharge tube in accordance with a first embodiment of the present invention. The dis-charge tube includes a cylinder cove~ 1 made of an elec-trically insulating material such as ceramic, and dis-charge electrodes 2 and 3 having nearly flat tip sur-faces, rounded at the peripheries of the surfaces and hermetically secured to the cover 1 by a vitreous or 2S metallic bonding agent 4 or the like. A gas filling hole 3a extends through the discharge electrode 3 and communicates with a gas filling pipe 5. After the discharge electrodes 2`and 3 are hermetically bonded to the cylindrical cover 1 and a gas is introduced into the assembly of the electrodes and the over through the gas filling pipe 5, the pipe is closed hermetically by pressing deformation and fuse-bonding at the same time, or a similar closing procedure. At that time, a solder or the like may be applied to the deformed portion of the gas filling pipe 5 if necessary. A paint manufac-.
. . . -; ~ - ~ . - - .
;, ' ~ , , ', :
, . . . .
. , - - .
`` 2033~Sl tured by suspending a fine powder of barium carbonate and a fine powder of calcium carbonate in water is applied to the side (a) of the inner portion of the discharge electrode 2, dried, and backed at a tempera-ture of about 900C for 30 minutes so that an activated layer 6 was formed on the side of the inner portion of the electrode.
The cylindrical cover 1 and the discharge elec-trodes 2 and 3 are assembled so that the electrodes are placed at a prescribed distance from each other. The bonding agent 4 then is applied to the mutually bonded surfaces of the cover and the electrodes and the paint was applied to the side (a) of the inner portion of the electrode 2. After that, the assembly of the cover 1 lS and the electrodes 2 and 3 was heated so that the acti-vated layer 6 was formed while the bonding agent 4 was fused and conjoined to the cover and the electrodes.
The assembly then had the gas evacuated from it. Argon of about 99.99~ purity thereafter was provided, under pressure, into the assembly, so that the argon was set at prescribed pressure in the assembly. The discharge tube A thus was manufactured.
Fig. 2 shows a discharge tube in accordance with a second embodiment of the present invention. The differ-ence between the discharge tubes represented Figs. 1 and
2 is that, in Fig. 2, an activated layer 6 is formed not on the side of the inner portion of a discharge electrode 2 but on tXe inside surface of the outer portion of the electrode 2.
Fig. 3 shows a discharge tube in accordance with a third embodiment of the present invention. The differ-ence between the discharge tubes of Figs. 1 and 3 is that, in Fig. 3, an activated layer 6 is formed not on the side of the inner portion of a discharge electrode S '.
.: , 2 but on the inside surface (c) of a cylindrical cover 1.
ComParative Example_l Fig. 4 shows a conventional discharge tube. The difference between the discharge tubes in Figs. 1 and 4 is that, in Fig. 4, an activated layer 6 is formed not on the side of the inner portion of a discharge elec-trode 2 but on the tip surface of the electrode 2.
Comparative ExamPle 2 In another conventional discharge tube E, an activated layer was not provided.
Testina The starting voltage and maintaining voltage of the discharge tubes were measured. Table 1 shows the results of the measurement.
Table 1 Discharge Discharge Discharge tube startina voltaqe maintainin~ voltaqe A (Fig. 1) 17+1 kV lOO+S V
B (Fig. 2) 17+1 kV 100+5 V
C (Fig- 3) 17+1 kV 100+5 V
D* (Fig- 4) 17+1 kV lOO+S V
E* 17+1 kV 200+9 V
Sign ~'*~ denotes the comparative example.
- 25 A discharge test was conducted on each of the discharge tubes A, B, ~, D and E two million times to . check whether the discharging properties of the tube deteriorated. .The discharging properties of the dis-` charge tubes A, B, C and E did not deteriorate, but the discharge keeping voltage of the discharge tube D rose to 180+10 V.
In a discharge tube provided in accordance with the - present invention, an activated layer containing an '`' ,.:
:
:' :, ,. : .
.. . .
"" .,.. ..... ,. ~ - ' ' ~ ' "
: . . , . - .
-2033~1 oxide of an alkali metal or an oxide of an alkaline earth metal is formed on at least part of a surface which is a portion of the tube but not the discharge surface of the electrode of the tube and is exposed to a gas filled in the tube. For that re2son, the dis-charge tube has a high starting voltage, and a low and stable maintaining voltage. The inventive discharge tube is very reliable, and does not deteriorate as quickly, and therefore is appropriate to constitute the series gap of an igniter for the engine of a motor vehicle or the like.
While the invention has been described in detail above with reference to a preferred embodiment, various modifications within the scope and spirit of the inven-tion will be apparent to people of working skill in thistechnological field. Thus, the invention should be considered as limited only by the scope of the appended claims.
Fig. 3 shows a discharge tube in accordance with a third embodiment of the present invention. The differ-ence between the discharge tubes of Figs. 1 and 3 is that, in Fig. 3, an activated layer 6 is formed not on the side of the inner portion of a discharge electrode S '.
.: , 2 but on the inside surface (c) of a cylindrical cover 1.
ComParative Example_l Fig. 4 shows a conventional discharge tube. The difference between the discharge tubes in Figs. 1 and 4 is that, in Fig. 4, an activated layer 6 is formed not on the side of the inner portion of a discharge elec-trode 2 but on the tip surface of the electrode 2.
Comparative ExamPle 2 In another conventional discharge tube E, an activated layer was not provided.
Testina The starting voltage and maintaining voltage of the discharge tubes were measured. Table 1 shows the results of the measurement.
Table 1 Discharge Discharge Discharge tube startina voltaqe maintainin~ voltaqe A (Fig. 1) 17+1 kV lOO+S V
B (Fig. 2) 17+1 kV 100+5 V
C (Fig- 3) 17+1 kV 100+5 V
D* (Fig- 4) 17+1 kV lOO+S V
E* 17+1 kV 200+9 V
Sign ~'*~ denotes the comparative example.
- 25 A discharge test was conducted on each of the discharge tubes A, B, ~, D and E two million times to . check whether the discharging properties of the tube deteriorated. .The discharging properties of the dis-` charge tubes A, B, C and E did not deteriorate, but the discharge keeping voltage of the discharge tube D rose to 180+10 V.
In a discharge tube provided in accordance with the - present invention, an activated layer containing an '`' ,.:
:
:' :, ,. : .
.. . .
"" .,.. ..... ,. ~ - ' ' ~ ' "
: . . , . - .
-2033~1 oxide of an alkali metal or an oxide of an alkaline earth metal is formed on at least part of a surface which is a portion of the tube but not the discharge surface of the electrode of the tube and is exposed to a gas filled in the tube. For that re2son, the dis-charge tube has a high starting voltage, and a low and stable maintaining voltage. The inventive discharge tube is very reliable, and does not deteriorate as quickly, and therefore is appropriate to constitute the series gap of an igniter for the engine of a motor vehicle or the like.
While the invention has been described in detail above with reference to a preferred embodiment, various modifications within the scope and spirit of the inven-tion will be apparent to people of working skill in thistechnological field. Thus, the invention should be considered as limited only by the scope of the appended claims.
Claims (13)
1. A discharge tube comprising:
an electrically insulating cylindrical cover;
a pair of discharge electrodes, disposed opposite each other a predetermined distance apart, said electrodes having first and second surfaces, said first surfaces being substantially flat, and rounded at the peripheries thereof, respective first surfaces of said first electrodes being disposed so as to face each other, said electrodes being hermetically secured to said cylinder cover; and an activated layer, provided on one of said second surfaces of one of said pair of electrodes and an inner surface of said cylindrical cover, said activated layer being is exposed to a gas which fills said discharge tube.
an electrically insulating cylindrical cover;
a pair of discharge electrodes, disposed opposite each other a predetermined distance apart, said electrodes having first and second surfaces, said first surfaces being substantially flat, and rounded at the peripheries thereof, respective first surfaces of said first electrodes being disposed so as to face each other, said electrodes being hermetically secured to said cylinder cover; and an activated layer, provided on one of said second surfaces of one of said pair of electrodes and an inner surface of said cylindrical cover, said activated layer being is exposed to a gas which fills said discharge tube.
2. A discharge tube as claimed in claim 1, wherein said activated layer is made from at least one of a compound of an alkali metal and a compound of alkaline earth metal.
3. A discharge tube as claimed in claim 2, wherein said compound of said alkali metal is made from at least a carbonate of said alkali metal and an organic acid salt of said alkali metal.
4. A discharge tube as claimed in claim 2, wherein said compound of alkaline earth metal is made from at least a carbonate of said alkaline earth metal and an organic acid salt of alkaline earth metal.
5. A discharge tube as claimed in claim 1, wherein said gas is argon.
6. A discharge tube as claimed in claim 1, wherein said electrically insulating cylindrical cover comprises a ceramic material.
7. A discharge tube as claimed in claim 1, wherein said activated layer is disposed on said second surface of one of said electrodes.
8. A discharge tube as claimed in claim 7, wherein said second surface is adjacent and perpendicular to said first surface.
9. A discharge tube as claimed in claim 7, wherein said second surface is parallel to said first surface.
10. A discharge tube as claimed in claim 1, wherein said activated layer is disposed on an inner surface of said cylindrical cover.
11. A discharge tube as claimed in claim 1, further comprising:
a bonding agent for fastening said electrically insulating cylinder cover on said electrodes; and a gas filling pipe communicated with a gas filling hole extended through said one of said electrodes.
a bonding agent for fastening said electrically insulating cylinder cover on said electrodes; and a gas filling pipe communicated with a gas filling hole extended through said one of said electrodes.
12. A discharge tube as claimed in claim 11, wherein said bonding agent is one of at least a vitreous and metallic bonding agent.
13. A method of manufacturing a gas-filled discharge tube, said discharge tube comprising a cylindrical cover, and a pair of opposed electrodes having respective first surfaces disposed so as to face each other, and respective second surfaces adjacent said respective first surfaces, said method comprising:
forming a layer containing one of a compound of an alkali metal or a compound of an alkaline earth metal on one of an inside surface of said cylindrical cover on one of said respective second surfaces of said electrode;
filling said tube with a gas;
assembling said cylindrical cover and the electrodes with a bonding agent; and heat-treating the assembly of said cylindrical cover and said electrode so that said layer is converted into an activated layer containing an oxide of said alkali metal or an oxide of said alkaline earth metal, and the bonding of said cylindrical cover to said electrodes is completed.
forming a layer containing one of a compound of an alkali metal or a compound of an alkaline earth metal on one of an inside surface of said cylindrical cover on one of said respective second surfaces of said electrode;
filling said tube with a gas;
assembling said cylindrical cover and the electrodes with a bonding agent; and heat-treating the assembly of said cylindrical cover and said electrode so that said layer is converted into an activated layer containing an oxide of said alkali metal or an oxide of said alkaline earth metal, and the bonding of said cylindrical cover to said electrodes is completed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-1495 | 1990-01-10 | ||
| JP2001495A JP2847105B2 (en) | 1990-01-10 | 1990-01-10 | Discharge tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2033601A1 true CA2033601A1 (en) | 1991-07-11 |
Family
ID=11503039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2033601 Abandoned CA2033601A1 (en) | 1990-01-10 | 1991-01-04 | Discharge tube and method of manufacturing same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2847105B2 (en) |
| CA (1) | CA2033601A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2439677A1 (en) * | 1974-08-19 | 1976-03-04 | Siemens Ag | PROCEDURE FOR THE INTRODUCTION OF FINISHINGS IN SURGE ARRESTER |
| JPS5878380A (en) * | 1981-11-04 | 1983-05-11 | 株式会社 水戸テツク | Arresting tube |
| CH651621A5 (en) * | 1985-01-04 | 1985-09-30 | Bauex Ag | Vertically adjustable post and railing with vertically adjustable posts |
| DE3760233D1 (en) * | 1986-04-22 | 1989-07-13 | Siemens Ag | Gas-discharge surge arrester |
| DE3621254A1 (en) * | 1986-06-25 | 1988-01-07 | Siemens Ag | GAS DISCHARGE SURGE ARRESTER |
-
1990
- 1990-01-10 JP JP2001495A patent/JP2847105B2/en not_active Expired - Fee Related
-
1991
- 1991-01-04 CA CA 2033601 patent/CA2033601A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JP2847105B2 (en) | 1999-01-13 |
| JPH03208282A (en) | 1991-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1063150A (en) | Fluorescent lamp with an integral fail-safe and auxiliary-amalgam component | |
| US5962977A (en) | Low pressure discharge lamp having electrodes with a lithium-containing electrode emission material | |
| KR930000380B1 (en) | Manufacturing method of discharge indicating system | |
| JPS6084761A (en) | Direct seal between niobium and ceramic | |
| JPH04174951A (en) | Discharge tube | |
| EP0482132A4 (en) | Glass plate illumination device sign with integral electrodes | |
| CA2033601A1 (en) | Discharge tube and method of manufacturing same | |
| JP2860335B2 (en) | Discharge tube | |
| GB1591150A (en) | Gas discharge surge arresters | |
| US4162151A (en) | Method of forming arc tube end seal | |
| EP0466106B1 (en) | A discharge tube | |
| EP1150334B1 (en) | Electrode for discharge tube and discharge tube using it | |
| US4541811A (en) | Method of manufacturing a low-pressure mercury vapor discharge lamp and low-pressure mercury vapor discharge lamp manufactured by this method | |
| CN1293599C (en) | Glowswitch starter | |
| EP0319256A2 (en) | High pressure sodium lamp with sodium amalgam of controlled amount sealed therein | |
| JPS58216353A (en) | Starter lamp | |
| JP3114203U (en) | Discharge tube | |
| JPH0711429Y2 (en) | Constant voltage discharge tube for ignition device | |
| CA1079342A (en) | Low noise sodium vapor lamp for sonic pulse operation | |
| JPH0294280A (en) | Constant-voltage discharge tube for ignition device of internal combustion engine | |
| JPH0222520B2 (en) | ||
| JPH0536460A (en) | Discharge type surge absorbing element | |
| JPH0294279A (en) | Constant-voltage discharge tube for ignition device of internal combustion engine | |
| JPH0258760B2 (en) | ||
| JPH11120957A (en) | Discharge tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |