JPH027489B2 - - Google Patents
Info
- Publication number
- JPH027489B2 JPH027489B2 JP59043134A JP4313484A JPH027489B2 JP H027489 B2 JPH027489 B2 JP H027489B2 JP 59043134 A JP59043134 A JP 59043134A JP 4313484 A JP4313484 A JP 4313484A JP H027489 B2 JPH027489 B2 JP H027489B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed electrode
- end plate
- switch tube
- manufacturing
- vacuum switch
- 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.)
- Expired - Lifetime
Links
- 238000005219 brazing Methods 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Keying Circuit Devices (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は気密封じのために排気管を使用しない
真空スイツチ管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method of manufacturing a vacuum switch tube that does not use an exhaust pipe for hermetic sealing.
一般に真空スイツチは絶縁物からなる真空容器
内にベローズを介して接離自在な一対の電極を収
納し、これを真空密閉して構成している。
In general, a vacuum switch is constructed by housing a pair of electrodes that can be freely brought into contact and separated from each other through a bellows in a vacuum container made of an insulating material, which is vacuum-sealed.
従来は排気管から排気して気密封じを行つてい
たが、最近、排気管を用いずに真空中でろう付け
する方法が提案されている。その理由は、
(1) 真空スイツチ管の製造工程中に脆弱な排気管
のチツプ部を傷つける可能性がある。 Conventionally, the gas was evacuated through an exhaust pipe to achieve airtight sealing, but recently a method has been proposed in which brazing is performed in a vacuum without using an exhaust pipe. The reasons are: (1) The fragile tip of the exhaust pipe may be damaged during the manufacturing process of the vacuum switch pipe.
(2) 排気管があると、しや断器に組み込むに際し
て排気管が邪魔になつて組み方が制限される。(2) If there is an exhaust pipe, the exhaust pipe will get in the way when it is assembled into the shatter breaker, limiting the way it can be assembled.
(3) 真空中でろう付けすれば、ベーキングと気密
封じが同時にできるので、工程短縮になる。(3) By brazing in a vacuum, baking and airtight sealing can be done at the same time, which shortens the process.
等が主な理由である。etc. are the main reasons.
排気管を有さない真空スイツチ管の製造方法と
しては、真空ろう付炉を使用し、真空スイツチの
構成部品を炉内を10-4Torr以下の高真空中にて
400〜600℃の温度でベーキングし、真空スイツチ
管の構成部品の近傍に設置したろう材の隙間から
排気した後、ろう付温度に加熱してろう材を溶か
すことにより、ろう付接合をし、部品の気密封じ
を行う方法が用いられている。 The manufacturing method for vacuum switch tubes without exhaust pipes uses a vacuum brazing furnace, and the components of the vacuum switch are placed in a high vacuum of 10 -4 Torr or less inside the furnace.
After baking at a temperature of 400 to 600℃ and exhausting the air through the gap between the brazing metal installed near the components of the vacuum switch pipe, the product is heated to the brazing temperature to melt the brazing metal, thereby making a brazed joint. A method of hermetically sealing the parts is used.
ところで、その際に問題になるのは、排気部分
の構造である。排気経路としては各構成部品を仮
組立した際、ろう材を介してのろう付部分の隙間
から行われることになるが、その隙間部分の排気
抵抗が高いと真空スイツチ管内部を十分な高真空
にできないという問題を生ずる。従来、各種の試
みがなされているが、排気抵抗を十分に低くする
ことができず、実用性に欠けていた。 By the way, the problem in this case is the structure of the exhaust part. The exhaust route is performed through the gap between the brazed parts through the brazing material when the components are temporarily assembled, but if the exhaust resistance in the gap is high, the inside of the vacuum switch tube must be under a sufficiently high vacuum. The problem arises that it is not possible to Various attempts have been made in the past, but they have not been able to lower the exhaust resistance sufficiently and lacked practicality.
また、波形ろう材等により排気抵抗を低くする
試みがなされているが、その取扱い上、波形がつ
ぶれ、変形しやすい。 Attempts have also been made to lower the exhaust resistance by using corrugated brazing filler metals, but the corrugations tend to collapse and deform due to handling.
この発明は上記のような従来のものの欠点を除
去するためになされたもので、排気部分の構造を
改良することにより、経済的で信頼性の高い真空
スイツチ管を提供することを目的としている。
This invention was made to eliminate the above-mentioned drawbacks of the conventional vacuum switch tube, and aims to provide an economical and highly reliable vacuum switch tube by improving the structure of the exhaust section.
以下、この発明の一実施例を図について説明す
る。第１図は真空スイツチ管を示し、１は絶縁物
で形成された真空容器、２は固定端板、３は可動
端板、４はベローズ、５は固定電極棒、６は可動
電極棒、７は固定電極、８は可動電極であり、そ
れぞれ固定電極棒５，可動電極棒６に固着されて
いる。９はシールドであり、電流開閉時に電極
７，８から発生する金属蒸気で真空容器１の内面
が汚損されるのを防止している。ベローズ４は可
動端板と可動電極棒との間に設けられていて、容
器内部の真空気密を保持しながら電極７，８の接
離を可能にしている。
An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows a vacuum switch tube, in which 1 is a vacuum container made of an insulator, 2 is a fixed end plate, 3 is a movable end plate, 4 is a bellows, 5 is a fixed electrode rod, 6 is a movable electrode rod, 7 is a fixed electrode, and 8 is a movable electrode, which are fixed to the fixed electrode rod 5 and the movable electrode rod 6, respectively. A shield 9 prevents the inner surface of the vacuum vessel 1 from being contaminated by metal vapor generated from the electrodes 7 and 8 when current is switched on and off. The bellows 4 is provided between the movable end plate and the movable electrode rod, and allows the electrodes 7 and 8 to be brought into contact with and separated from each other while maintaining vacuum tightness inside the container.
このように構成された真空スイツチ管を真空中
で充分に排気させるため、前記固定電極棒５の径
大部に凹部からなる係止部を設け、前記端板の真
空容器外に設けた支持部材１０との間に配置した
平板なろう材１１により、固定電極棒５と端板２
の間に空間が形成されるようにし、排気口となる
ように構成している。 In order to sufficiently evacuate the vacuum switch tube configured in this manner in a vacuum, a locking portion consisting of a recess is provided in the large diameter portion of the fixed electrode rod 5, and a support member is provided outside the vacuum container on the end plate. A flat brazing material 11 placed between the fixed electrode rod 5 and the end plate 2
A space is formed between them to serve as an exhaust port.
なお、ろう材１１は第１図の平面図である第２
図のように排気口をふさいでしまわないように円
周方向の一部に用いられている。 Note that the brazing material 11 is shown in FIG.
As shown in the figure, it is used in a part of the circumference so as not to block the exhaust port.
第２図は第１図を矢印方向から見た平面図であ
る。固定電極棒５と固定側端板２との空間W1と
固定電極棒５と支持部材１０との間でろう材１１
のない空間W2が排気口となる。 FIG. 2 is a plan view of FIG. 1 viewed from the direction of the arrow. A brazing material 11 is formed between the space W 1 between the fixed electrode rod 5 and the fixed end plate 2 and between the fixed electrode rod 5 and the support member 10.
The empty space W 2 becomes the exhaust port.
上記のように構成すれば、真空ろう付炉中に真
空スイツチ管を設置し周囲を真空に排気した時真
空スイツチ管内部の気体は上記の排気口を通して
充分に排気できる。さらに、炉温を上げ前記ろう
材１１が溶融すると、固定電極棒５の自重によ
り、下方へ移動するとともに、とけたろう材１１
により固定電極棒５の径大部と固定端板２間を接
合することができる。 With the above structure, when the vacuum switch tube is installed in a vacuum brazing furnace and the surrounding area is evacuated, the gas inside the vacuum switch tube can be sufficiently exhausted through the exhaust port. Further, when the furnace temperature is increased and the brazing filler metal 11 melts, the fixed electrode rod 5 moves downward due to its own weight, and the melted brazing filler metal 11
By this, the large diameter portion of the fixed electrode rod 5 and the fixed end plate 2 can be joined.
平板なろう材は簡単に製作することが可能であ
り、また、このような構成により排気抵抗を充分
に低くすることができるので、効率的な高真空気
密封じが可能になる。 A flat brazing filler metal can be easily manufactured, and such a configuration can sufficiently reduce exhaust resistance, thereby enabling efficient high vacuum sealing.
また、支持部材１０をセラミツク，カーボンと
すれば、これらはろう材と接合しない性質がある
ため、真空気密封じ後、簡単に支持部材を取り外
すことができ、治具として再使用することが可能
である。 Furthermore, if the supporting member 10 is made of ceramic or carbon, since these materials have the property of not bonding with the brazing material, the supporting member can be easily removed after vacuum sealing and can be reused as a jig. be.
第３図は支持部材１０内の径方向に排気口を設
けた実施例であり、ａは断面図、ｂは平面図であ
る。排気口１０ａを設けることにより、第２図の
実施例に比し排気口１０ａを設けた分だけ、さら
に排気抵抗を下げることが可能である。この場
合、使用されるろう材１１は第２図で示されるも
ので良い。更に、この際、固定電極棒５と端板２
の位置決めを容易にするため、第４図に示すよう
にすることができる。即ち、端板２と支持部材１
０とのかん合部１２を設け、支持部材１０と固定
電極棒５の径大部をかん合することにより、位置
決めが第１図、第２図に示す実施例に比し容易に
なる。この場合の排気は支持部材１０の排気口１
０ａを通つて充分行うことができる。 FIG. 3 shows an embodiment in which exhaust ports are provided in the radial direction within the support member 10, in which a is a sectional view and b is a plan view. By providing the exhaust port 10a, it is possible to further reduce the exhaust resistance compared to the embodiment shown in FIG. 2 by the amount of the exhaust port 10a. In this case, the brazing material 11 used may be that shown in FIG. Furthermore, at this time, the fixed electrode rod 5 and the end plate 2
In order to facilitate positioning, the arrangement shown in FIG. 4 can be adopted. That is, the end plate 2 and the support member 1
0 and the large diameter portion of the fixed electrode rod 5 is provided, positioning becomes easier than in the embodiments shown in FIGS. 1 and 2. In this case, the exhaust is from the exhaust port 1 of the support member 10.
It is possible to do this by passing through 0a.
第５図は支持部材１０の内径部分を多角形と
し、固定電極棒５の径大部との間に生じる空間１
０ｂと固定電極棒５と端板２との間隙W1とが排
気口となるようにし、固定電極棒５の径小部と支
持部材１０が接触する接触部１０ｃにより位置決
めを行うものである。 In FIG. 5, the inner diameter part of the support member 10 is polygonal, and the space 1 created between it and the large diameter part of the fixed electrode rod 5.
0b and the gap W1 between the fixed electrode rod 5 and the end plate 2 serve as an exhaust port, and positioning is performed by the contact portion 10c where the small diameter portion of the fixed electrode rod 5 and the support member 10 come into contact.
第６図は固定電極径大部の端を係止部５ｂと
し、支持部材１０との間に配置した平板なろう材
１１により、固定電極棒５と端板２との間に空間
が形成されるようにした他の実施例である。この
場合、固定電極棒５の径大部に凹部を設けずに構
成することができるので加工費が安くなる。 In FIG. 6, the end of the large diameter part of the fixed electrode is used as a locking part 5b, and a space is formed between the fixed electrode rod 5 and the end plate 2 by a flat brazing material 11 placed between it and the support member 10. This is another embodiment in which the In this case, the large diameter portion of the fixed electrode rod 5 can be configured without providing a recess, which reduces processing costs.
第７図は固定電極棒５の径大部と固定電極７の
間の部分を四角形に形成した実施例であり、ａは
側面図、ｂは平面図である。２ａは端板２の穴で
ある。排気は端板と四角形部分とのすき間１０ｃ
を通して行われ、端板と四角形部分との接触部分
１０ｄにより位置決めを行うことができる。勿論
四角形以外の多角形であつても良いし、突起部を
設けるようにしても良い。 FIG. 7 shows an embodiment in which the portion between the large-diameter portion of the fixed electrode rod 5 and the fixed electrode 7 is formed into a rectangular shape, where a is a side view and b is a plan view. 2a is a hole in the end plate 2. For exhaust, the gap between the end plate and the square part is 10c.
The positioning can be performed by the contact portion 10d between the end plate and the rectangular portion. Of course, it may be a polygon other than a quadrangle, or may be provided with a protrusion.
以上の実施例はいずれもろう材１１を支持する
支持部材１０を設けているが、この発明は支持部
材１０を設けなくとも実施できる。 Although the above embodiments all include the support member 10 that supports the brazing filler metal 11, the present invention can be practiced without providing the support member 10.
第８図は支持部材を設けない実施例であり、第
９図はその平面図である。固定電極棒５はその係
止部５ｂをろう材１１により支持されて端板２と
間隙を保つて配置されている。排気は固定電極棒
５と端板２の段部１２の外径とのすき間W3を通
して行われる。排気した後に加熱してろう材を溶
かすと固定電極棒５の径大部が下降して、その端
にある係止部５ｂが端板の段部１２とろう付けさ
れる。ろう材１１は第９図に示すように全周にわ
たつては設けられないが、溶かされると全周に拡
がるので固定電極棒５と端板２はすき間なくろう
付けされる。 FIG. 8 shows an embodiment in which no support member is provided, and FIG. 9 is a plan view thereof. The fixed electrode rod 5 is supported at its locking portion 5b by a brazing material 11, and is arranged with a gap maintained between it and the end plate 2. Exhaust is performed through a gap W 3 between the fixed electrode rod 5 and the outer diameter of the stepped portion 12 of the end plate 2 . When the brazing material is melted by heating after exhausting the air, the large-diameter portion of the fixed electrode rod 5 descends, and the locking portion 5b at the end thereof is brazed to the stepped portion 12 of the end plate. As shown in FIG. 9, the brazing material 11 is not provided over the entire circumference, but when melted, it spreads over the entire circumference, so that the fixed electrode rod 5 and the end plate 2 are brazed without any gaps.
本発明は、上記した実施例に限定されることな
く要旨を変えずにさまざまな応用が可能である。 The present invention is not limited to the embodiments described above and can be applied in various ways without changing the gist.
以上のように、この発明によれば、排気部分の
構造を改良して排気抵抗を少なくすることによ
り、経済的で信頼性の高い高真空気密符じを可能
にした真空スイツチ管を製造することができる。
As described above, according to the present invention, by improving the structure of the exhaust part and reducing the exhaust resistance, it is possible to manufacture a vacuum switch tube that enables an economical and highly reliable high-vacuum airtight system. Can be done.
第１図は本発明の製造方法の一実施例を示す真
空スイツチ管の断面図、第２図は本発明に使用さ
れるろう材の設置状況を示す平面図、第３図は支
持部材の一例を示す構造図、第４図，第５図，第
６図，第７図，第８図，第９図は本発明の他の実
施例を示す平面図及び断面図である。
図において、１は絶縁容器、２，３は端板、４
はベローズ、５は固定電極棒、５ｂは係止部、６
は固定電極棒、７，８は電極、１０は支持部材、
１１はろう材、１２はかん合部である。なお、各
図中の同一符号は同一又は相当部分を示す。
Fig. 1 is a cross-sectional view of a vacuum switch tube showing an embodiment of the manufacturing method of the present invention, Fig. 2 is a plan view showing how the brazing material used in the invention is installed, and Fig. 3 is an example of a support member. FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9 are plan views and sectional views showing other embodiments of the present invention. In the figure, 1 is an insulating container, 2 and 3 are end plates, and 4
is a bellows, 5 is a fixed electrode rod, 5b is a locking part, 6
is a fixed electrode rod, 7 and 8 are electrodes, 10 is a support member,
11 is a brazing material, and 12 is a mating part. Note that the same reference numerals in each figure indicate the same or equivalent parts.
Claims (1)
けられた固定電極と、この固定電極に対向して設
けられた可動電極との接離によつて電路の開閉を
行う真空スイツチ管を製造する方法において、前
記固定電極から導出した固定電極棒の端板に近接
する部位に径大部を設け、前記固定電極棒が隙間
を有して貫通する前記端板の穴のまわりに前記径
大部が受け入れられる段部を形成し、この段部の
内径は前記径大部の外径よりも実質的に大きくな
されており、この径大部の係止部と前記端板との
間にわたした平板なろう材により前記固定電極棒
の径大部を前記端板の段部に対して浮かすように
配置し、真空炉中にて温度を上昇させ、固定電極
棒と端板をその間に設けたろう材の溶融により接
合させるようにした真空スイツチ管の製造方法。 ２ 径大部の端を係止部としたことを特徴とする
特許請求の範囲第１項記載の真空スイツチ管の製
造方法。 ３ 端板には固定電極棒と接合する段部が設けら
れていることを特徴とする特許請求の範囲第１項
記載の真空スイツチ管の製造方法。 ４ 真空容器の端を端板で閉塞し、その内部に設
けられた固定電極と、この固定電極に対向して設
けられた可動電極との接離によつて電路の開閉を
行う真空スイツチ管を製造する方法において、前
記固定電極から導出した固定電極棒の端板に近接
する部位に径大部を設け、前記固定電極棒が隙間
を有して貫通する前記端板の穴のまわりに段部を
形成するため、前記径大部より大きな内径の穴を
有した支持部材を前記端板の上に載置し、この径
大部の係止部と前記端板の上に載置した支持部材
との間にわたした平板なろう材により前記固定電
極棒の径大部を前記段部に対して浮かすように配
置し、真空炉中にて温度を上昇させ、固定電極棒
と端板を前記ろう材の溶融により接合させるよう
にした真空スイツチ管の製造方法。 ５ 固定電極棒の径大部に凹部を設けて係止部と
したことを特徴とする特許請求の範囲第４項記載
の真空スイツチ管の製造方法。 ６ 固定電極棒の径大部の端を係止部としたこと
を特徴とする特許請求の範囲第４項記載の真空ス
イツチ管の製造方法。 ７ 支持部材を端板にかん合させたことを特徴と
する特許請求の範囲第４項に記載の真空スイツチ
管の製造方法。 ８ 支持部材に多角形の穴が形成され、固定電極
棒の断面が円形であることを特徴とする特許請求
の範囲第４項記載の真空スイツチ管の製造方法。 ９ 支持部材に円形の穴が形成され、固定電極棒
の断面が多角形であることを特徴とする特許請求
の範囲第４項記載の真空スイツチ管の製造方法。 １０ 支持部材に内径から外径に至る排気口を設
けたことを特徴とする特許請求の範囲第４項記載
の真空スイツチ管の製造方法。 １１ 支持部材がろう材が付着しない材質で構成
されるものであることを特徴をする特許請求の範
囲第４項記載の真空スイツチ管の製造方法。 １２ 支持部材がセラミツク、カーボンの中の一
つから選択されることを特徴とする特許請求の範
囲第１１項記載の真空スイツチ管の製造方法。[Claims] 1. The end of the vacuum container is closed with an end plate, and an electric circuit is opened and closed by connecting and separating a fixed electrode provided inside the container and a movable electrode provided opposite to the fixed electrode. In the method for manufacturing a vacuum switch tube, a large-diameter portion is provided in a portion close to the end plate of the fixed electrode rod led out from the fixed electrode, and the end plate is penetrated by the fixed electrode rod with a gap. A stepped portion is formed around the hole in which the large diameter portion is received, and the inner diameter of the stepped portion is substantially larger than the outer diameter of the large diameter portion, and the locking portion of the large diameter portion and the aforementioned stepped portion are formed. The large-diameter portion of the fixed electrode rod is placed so as to float relative to the stepped portion of the end plate by a flat brazing material passed between the end plate, and the temperature is raised in a vacuum furnace to separate the fixed electrode rod. A method for manufacturing a vacuum switch tube in which the end plate and the end plate are joined by melting a brazing filler metal provided between them. 2. The method for manufacturing a vacuum switch tube according to claim 1, wherein the end of the large diameter portion is a locking portion. 3. The method of manufacturing a vacuum switch tube according to claim 1, wherein the end plate is provided with a stepped portion that connects with the fixed electrode rod. 4. A vacuum switch tube that closes the end of a vacuum container with an end plate and opens and closes an electric circuit by connecting and separating a fixed electrode provided inside the container and a movable electrode provided opposite to this fixed electrode. In the manufacturing method, a large diameter portion is provided in a portion close to an end plate of a fixed electrode rod led out from the fixed electrode, and a stepped portion is provided around a hole in the end plate through which the fixed electrode rod passes through with a gap. , a support member having a hole with an inner diameter larger than the large diameter portion is placed on the end plate, and a supporting member placed on the locking portion of the large diameter portion and the end plate. The large-diameter part of the fixed electrode rod is placed so as to float above the stepped part by a flat brazing material passed between the electrodes, and the temperature is raised in a vacuum furnace, and the fixed electrode rod and end plate are placed in the same position as above. A method for manufacturing a vacuum switch tube that is joined by melting brazing metal. 5. The method of manufacturing a vacuum switch tube according to claim 4, wherein a recess is provided in the large diameter portion of the fixed electrode rod to serve as a locking portion. 6. The method of manufacturing a vacuum switch tube according to claim 4, wherein the end of the large diameter portion of the fixed electrode rod is used as a locking portion. 7. The method of manufacturing a vacuum switch tube according to claim 4, characterized in that the support member is engaged with the end plate. 8. The method of manufacturing a vacuum switch tube according to claim 4, wherein a polygonal hole is formed in the support member, and the fixed electrode rod has a circular cross section. 9. The method of manufacturing a vacuum switch tube according to claim 4, wherein a circular hole is formed in the support member, and the fixed electrode rod has a polygonal cross section. 10. The method of manufacturing a vacuum switch tube according to claim 4, wherein the support member is provided with an exhaust port extending from the inner diameter to the outer diameter. 11. The method of manufacturing a vacuum switch tube according to claim 4, wherein the supporting member is made of a material to which a brazing material does not adhere. 12. The method of manufacturing a vacuum switch tube according to claim 11, wherein the supporting member is selected from one of ceramic and carbon.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4313484A JPS60189127A (en) | 1984-03-06 | 1984-03-06 | Method of producing vacuum switch |
| GB08425615A GB2148601B (en) | 1983-10-24 | 1984-10-10 | Process for preparing a vacuum switch tube |
| DE19843437380 DE3437380A1 (en) | 1983-10-24 | 1984-10-11 | METHOD FOR PRODUCING A VACUUM SWITCH TUBE |
| US06/662,152 US4630361A (en) | 1983-10-24 | 1984-10-18 | Process for preparing a vacuum switch tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4313484A JPS60189127A (en) | 1984-03-06 | 1984-03-06 | Method of producing vacuum switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60189127A JPS60189127A (en) | 1985-09-26 |
| JPH027489B2 true JPH027489B2 (en) | 1990-02-19 |
Family
ID=12655372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4313484A Granted JPS60189127A (en) | 1983-10-24 | 1984-03-06 | Method of producing vacuum switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60189127A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5255416B2 (en) * | 2008-12-02 | 2013-08-07 | 三菱電機株式会社 | Vacuum valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493164A (en) * | 1972-04-27 | 1974-01-11 |
-
1984
- 1984-03-06 JP JP4313484A patent/JPS60189127A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493164A (en) * | 1972-04-27 | 1974-01-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60189127A (en) | 1985-09-26 |
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