JPH0439646Y2 - - Google Patents
Info
- Publication number
- JPH0439646Y2 JPH0439646Y2 JP3828485U JP3828485U JPH0439646Y2 JP H0439646 Y2 JPH0439646 Y2 JP H0439646Y2 JP 3828485 U JP3828485 U JP 3828485U JP 3828485 U JP3828485 U JP 3828485U JP H0439646 Y2 JPH0439646 Y2 JP H0439646Y2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- cathode
- impregnated
- cylindrical body
- embedding agent
- 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
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 7
- 238000005219 brazing Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 229910000929 Ru alloy Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- OUFGXIPMNQFUES-UHFFFAOYSA-N molybdenum ruthenium Chemical compound [Mo].[Ru] OUFGXIPMNQFUES-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Solid Thermionic Cathode (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
この考案は、特に高信頼性が要求される進行波
管やクライストロンなどの電子管に好適な含浸型
陰極構体に関する。[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an impregnated cathode structure suitable for electron tubes such as traveling wave tubes and klystrons that particularly require high reliability.
人工衛星などに搭載される高出力進行波管など
には高電流密度が要求され、それに適する陰極と
して含浸型陰極構体がある。特にこの陰極に要求
される特性は、長寿命であること、また衛星に搭
載される場合には太陽電池が電源となるので、低
消費電力型であることが必要である。さらに高信
頼性であることが要求され、打上げ時の衝撃に対
して変形しないこと、ヒータの埋込剤が脱落する
と、陰極基体への熱伝達が低下して陰極の温度が
下がり、特性劣化をおこし、また脱落物が管内異
物となつて、電子管の動作を妨げたり、管内放電
を発生したりするので、衝撃に対して十分な強度
をもつことなどが必要である。
High current density is required for high-power traveling wave tubes mounted on artificial satellites, etc., and an impregnated cathode structure is suitable for this purpose. In particular, the characteristics required of this cathode are that it has a long lifespan, and that it has low power consumption since solar cells will be the power source when it is mounted on a satellite. Furthermore, high reliability is required, and it must not be deformed by impact during launch.If the heater embedding agent falls off, heat transfer to the cathode substrate will decrease, causing the cathode temperature to drop and causing property deterioration. It is necessary to have sufficient strength to withstand shocks, as the falling objects may become foreign objects in the tube, which may interfere with the operation of the electron tube or cause discharge within the tube.
ところで、従来の含浸型陰極構体は、第４図に
示すように、タングステン粉末を焼結して得られ
た多孔質の金属基体の空孔部に、BaO，CaO，
Al2O3などからなる電子放射物質を含浸させ、凹
球面状に形成された一端面を電子放射面１とする
陰極基体２の他端面側にヒータ部３が取り付けら
れた構造になつており、ヒータ部３は、モリブデ
ン・ルテニウム合金からなるろう材４により、上
記陰極基体２の他端面側に接合されたモリブデン
などの高融点金属からなる筒状のヒータ容器５
と、このヒータ容器５内に挿入されたヒータ６
と、アルミナ粉末を有機バインダで泥状化し、こ
れを上記ヒータ容器５内に充填したのち、水素あ
るいは真空中で高温加熱して焼結させたヒータ埋
込剤７とからなる。 By the way, in the conventional impregnated cathode structure, as shown in FIG. 4, BaO, CaO,
It has a structure in which a cathode substrate 2 is impregnated with an electron emitting substance such as Al 2 O 3 and formed into a concave spherical shape, with one end surface serving as an electron emitting surface 1 and a heater section 3 attached to the other end surface side. The heater section 3 includes a cylindrical heater container 5 made of a high-melting point metal such as molybdenum, which is bonded to the other end surface of the cathode substrate 2 by a brazing filler metal 4 made of a molybdenum-ruthenium alloy.
and a heater 6 inserted into this heater container 5.
and a heater embedding agent 7, which is made by turning alumina powder into a slurry with an organic binder, filling it into the heater container 5, and then sintering it by heating it at high temperature in hydrogen or vacuum.
このようにヒータ６を埋込むと、陰極基体２を
通常の酸化物陰極より高い980〜1050℃に加熱す
るヒータ６の温度を下げることができ、ヒータ６
の断線を防止することができる。 By embedding the heater 6 in this way, the temperature of the heater 6 that heats the cathode substrate 2 to 980 to 1050°C, which is higher than that of a normal oxide cathode, can be lowered.
It is possible to prevent wire breakage.
しかしながら上記のようなアルミナ粉末を有機
バインダで泥状化してヒータ容器５に充填する
と、埋込剤７は、バインダが乾燥するときに収縮
して、ヒータ容器５の開口縁からの深さが一定し
ない。そのためバインダ乾燥後、上記開口から先
のとがつた金属棒やガラス棒などで余剰の埋込剤
を除去するが、直径３〜５mm程度であつて、かつ
ヒータ６の脚部が露出しているヒータ容器５内か
ら余剰の埋込剤を除去することはきわめて困難で
ある。またその表面を平坦化することも困難であ
る。またバインダが乾燥して収縮するとき、表面
容器５の内面にアルミナ微粒子が大量のバインダ
により結着されるが、このアルミナ微粒子はほと
んど除去することができず、そのまま焼結され
る。そのためこれが打上げ時の衝撃で脱落しやす
く、管内異物となつて電子管動作に悪影響を与え
る。さらにまた、埋込剤の余剰部分の除去が正確
におこなわれないと、熱伝達にばらつきを生じ、
ヒータ６オン後陰極基体２が所定の動作温度にな
るまでの時間が異なるようになり、電子管の動作
開始時間が変化する。また充填量の不均一により
ヒータの消費電力が変化するなどの問題点があ
る。 However, when the above alumina powder is made into a slurry with an organic binder and filled into the heater container 5, the embedding agent 7 contracts when the binder dries, and the depth from the opening edge of the heater container 5 remains constant. do not. Therefore, after the binder dries, excess embedding material is removed from the opening using a pointed metal rod or glass rod, but the diameter is approximately 3 to 5 mm, and the legs of the heater 6 are exposed. It is extremely difficult to remove excess embedding material from inside the heater container 5. It is also difficult to flatten the surface. Further, when the binder dries and shrinks, a large amount of alumina particles are bound to the inner surface of the surface container 5 by the binder, but these alumina particles can hardly be removed and are sintered as they are. Therefore, this material tends to fall off due to impact during launch, becoming a foreign object inside the tube and adversely affecting the operation of the electron tube. Furthermore, if excess mounting material is not removed accurately, heat transfer may vary.
The time it takes for the cathode substrate 2 to reach a predetermined operating temperature after the heater 6 is turned on becomes different, and the operation start time of the electron tube changes. Further, there are problems such as variations in power consumption of the heater due to non-uniform filling amount.
この考案は、ヒータ埋込剤の量を一定にするこ
とができ、しかも脱落を生ぜず、高信頼性かつ高
品位にして製作容易な含浸型陰極構体を構成する
ことにある。
The purpose of this invention is to construct an impregnated cathode structure that can keep the amount of heater embedding agent constant, does not fall off, is highly reliable, has high quality, and is easy to manufacture.
高融点多孔質金属基体の空孔部に電子放射物質
が含浸され、一端面を電子放射面とする陰極基体
の他端側面に、ヒータ容器内に耐熱絶縁性の埋込
剤によりヒータが埋込まれたヒータ部が取り付け
られた含浸型陰極構体において、上記ヒータ容器
を同軸に接合される一対の筒体で構成し、かつ上
記陰極基体側に位置する第１筒体に上記埋込剤を
ほぼ完全に充填し、上記陰極基体から離れて位置
する第２筒体に埋込剤が存在しないように構成す
ることにより、ヒータ容器に埋込剤を一定量かつ
脱落を生じないように充填できるようにした。
The pores of the high melting point porous metal substrate are impregnated with an electron emitting substance, and one end surface is the electron emitting surface, and the other end surface of the cathode substrate is embedded with a heater in a heater container using a heat-resistant insulating embedding material. In the impregnated cathode assembly to which the heater section is attached, the heater container is composed of a pair of cylinders coaxially joined, and the embedding agent is substantially filled in the first cylinder located on the cathode base side. By completely filling the heater container and configuring the second cylindrical body located away from the cathode substrate so that no embedding agent is present, the heater container can be filled with a constant amount of embedding agent without falling out. I made it.
以下、図面を参照してこの考案を実施例に基づ
いて説明する。
Hereinafter, this invention will be explained based on examples with reference to the drawings.
第１図にこの考案の一実施例である含浸型陰極
構体を示す。この陰極構体は、一端面を電子放射
面１とする陰極基体２と、この陰極基体２の他端
面側に取り付けられたヒータ部１０とを有する。 FIG. 1 shows an impregnated cathode structure which is an embodiment of this invention. This cathode assembly includes a cathode base 2 having one end surface as an electron emitting surface 1, and a heater section 10 attached to the other end surface of the cathode base 2.
上記陰極基体２は、タングステンからなる高融
点多孔質金属基体の空孔部に、BaO，CaO，Al2
O3からなる電子放射物質を含浸させたものであ
つて、電子放射面１は、その一端面に凹球面状に
形成され、また他端面側には、ヒータ部１０が取
り付けられる径小部が形成されている。 The cathode substrate 2 has BaO, CaO, Al 2 in the pores of a high melting point porous metal substrate made of tungsten.
The electron emitting surface 1 is impregnated with an electron emitting material made of O 3 , and the electron emitting surface 1 has a concave spherical shape on one end surface, and a small diameter portion on the other end surface to which the heater section 10 is attached. It is formed.
ヒータ部１０は、上記陰極基体２の径小部に嵌
合するモリブデンからなる筒状のヒータ容器１１
と、このヒータ容器１１内に挿入されたヒータ６
と、このヒータ６を埋込む如く上記ヒータ容器１
１に充填されたアルミナ粉末からなる耐熱絶縁性
の埋込剤１２とからなる。上記ヒータ容器１１
は、上記陰極基体２の径小部に嵌合し、陰極基体
２の他端面を被覆するモリブデン・ルテニウム合
金からなる高融点ろう材４により陰極基体２に同
軸に接合され、内側に埋込剤１２がその開口端ま
でほぼ完全に充填された第１筒体１４と、この第
１筒体１４の開口端側に形成された径小部の外側
に嵌合されて、たとえばレーザ溶接により第１筒
体１４と同軸一体に取り付けられ、内側に埋込剤
１２が存在しない第２筒体１５とから構成されて
いる。 The heater section 10 includes a cylindrical heater container 11 made of molybdenum that fits into the small diameter portion of the cathode substrate 2.
and the heater 6 inserted into this heater container 11
Then, the heater container 1 is inserted so as to embed the heater 6 therein.
1 and a heat-resistant insulating embedding agent 12 made of alumina powder. The heater container 11
is coaxially joined to the cathode substrate 2 by a high melting point brazing material 4 made of a molybdenum-ruthenium alloy that fits into the small diameter portion of the cathode substrate 2 and covers the other end surface of the cathode substrate 2, and has an embedding agent inside. 12 is almost completely filled up to its open end, and the first cylinder 12 is fitted onto the outside of a small-diameter portion formed on the open end side of the first cylinder body 14, and the first The second cylinder 15 is attached coaxially with the cylinder 14 and has no implant 12 inside.
なお、第１図において、１７は支持体、１８は
支持筒である。 In addition, in FIG. 1, 17 is a support body, and 18 is a support cylinder.
この含浸型陰極構体はつぎにように製作され
る。 This impregnated cathode structure is manufactured as follows.
まず所定粒径のタングステン粉末を棒状に圧縮
成形し、これを還元性雰囲気中で焼結する。そし
てこの焼結により得られた多孔質焼結体の空孔部
に銅を含浸し、これ銅含浸焼結体を切削加工によ
り所定形状に加工する。しかるのち含浸した銅を
硝酸および水素炉などによる高温加熱で除去し、
あらたにその空孔部にBaO，CaO，Al2O3などか
らなる電子放射物質を高温の還元性雰囲気中で溶
融含浸させて陰極基体２を製作する。 First, tungsten powder with a predetermined particle size is compression-molded into a rod shape, and this is sintered in a reducing atmosphere. Then, the pores of the porous sintered body obtained by this sintering are impregnated with copper, and the copper-impregnated sintered body is processed into a predetermined shape by cutting. The impregnated copper is then removed by high-temperature heating using nitric acid and a hydrogen furnace.
The cathode substrate 2 is then fabricated by melting and impregnating the hole with an electron-emitting substance made of BaO, CaO, Al 2 O 3 or the like in a high-temperature reducing atmosphere.
つぎにこの陰極基体２の径小部側の端面にモリ
ブデン・ルテニウム合金からなるろう材を塗布し
たのち、あらかじめ切削などの機械加工により形
成したモリブデンからなる第１筒体１４を上記径
小部に嵌合し、これらを水素雰囲気中で加熱して
上記ろう材を溶融する。溶融したろう材４は、上
記陰極基体２の径小部側の端面を被覆するととも
に、陰極基体２と第１筒体１４との嵌合部に浸入
してこれらをろう接する。 Next, after applying a brazing material made of a molybdenum-ruthenium alloy to the end face of the small diameter portion of the cathode substrate 2, a first cylindrical body 14 made of molybdenum, which has been previously formed by machining such as cutting, is attached to the small diameter portion. They are fitted together and heated in a hydrogen atmosphere to melt the brazing material. The molten brazing filler metal 4 covers the end face of the cathode base 2 on the small-diameter side, and also enters the fitting portion between the cathode base 2 and the first cylindrical body 14 to braze them together.
つぎに、この陰極基体２に一体に接合された第
１筒体１４内にヒータ６を挿入し、さらに平均粒
径が10μmと30μmのアルミナ粉末を３：７の割合
で混合し、これにニトロセルローズをバインダと
して有機溶剤を加えて混練したものを、第１筒体
１４の開口面上に盛り上がるように充填して乾燥
する。しかるのちこの埋込剤１２を金属板または
ガラス板などからなる工具を用いて、第１筒体１
４の開口端縁と同一平面になるように余剰の埋込
剤を削り取る。その後真空中で加熱して、この第
１筒体１４内の埋込剤１２を焼結する。 Next, a heater 6 is inserted into the first cylindrical body 14 that is integrally joined to the cathode base 2, and alumina powders having an average particle size of 10 μm and 30 μm are mixed in a ratio of 3:7, and nitro A mixture of cellulose as a binder and an organic solvent is added and kneaded, and then filled so as to bulge on the opening surface of the first cylindrical body 14 and dried. Thereafter, this embedding agent 12 is inserted into the first cylindrical body 1 using a tool made of a metal plate, a glass plate, or the like.
Scrape off the excess embedding material so that it is flush with the opening edge of step 4. Thereafter, it is heated in a vacuum to sinter the embedding agent 12 within this first cylindrical body 14.
しかるのちこの第１筒体１４の開口部に形成さ
れている径小部に、あらかじめ切削などの機械加
工により形成された第２筒体１５を嵌合し、レー
ザ溶接によりこの第２筒体１５を第１筒体１４に
接合する。 Thereafter, a second cylinder 15 previously formed by machining such as cutting is fitted into the small diameter portion formed in the opening of the first cylinder 14, and the second cylinder 15 is assembled by laser welding. is joined to the first cylindrical body 14.
上記のように含浸型陰極構体を構成すると、第
２筒体１５を接合する前に、第１筒体１４の開口
端縁を基準にして余剰の埋込剤を除去できるの
で、埋込剤１２の充填量を一定にすることができ
る。したがつてヒータ部１０の熱容量が一定とな
り、ヒータ６オン後陰極基体２が動作温度に到達
するまでの時間のばらつきを少くすることがで
き、またヒータの消費電力を一定にすることがで
きる。また第１筒体１４に埋込剤１２を充填した
のちに第２筒体１５を接合することができ、この
第２筒体１５には全然充填剤１２が付着しないの
で、従来の含浸型陰極構体と異なり、衝撃が加わ
つてもアルミナが脱落することがない。また第２
筒体１５にアルミナが全然付着していないので、
支持筒１７を容易に溶接することができる。また
第１筒体１４に充填された埋込剤１２をその開口
端縁を基準にして、第２筒体１５を接合する前に
削り取ることができるので、その作業を容易にお
こなうことができ、かつその面をアルミナの脱落
のない平坦面に仕上げることができる。 When the impregnated cathode structure is configured as described above, excess embedding agent can be removed with reference to the opening edge of the first cylindrical body 14 before joining the second cylindrical body 15. The filling amount can be kept constant. Therefore, the heat capacity of the heater section 10 becomes constant, and variations in the time it takes for the cathode substrate 2 to reach the operating temperature after the heater 6 is turned on can be reduced, and the power consumption of the heater can be made constant. Furthermore, the second cylinder 15 can be joined after filling the first cylinder 14 with the embedding agent 12, and since the filler 12 does not adhere to the second cylinder 15 at all, the conventional impregnated cathode Unlike the structure, the alumina does not fall off even if an impact is applied. Also the second
Since there is no alumina attached to the cylinder 15,
The support tube 17 can be easily welded. Furthermore, since the embedding agent 12 filled in the first cylindrical body 14 can be scraped off before joining the second cylindrical body 15 based on the opening edge of the first cylindrical body 14, this work can be easily performed. Moreover, the surface can be finished as a flat surface without any alumina falling off.
つぎに他の実施例について述べる。 Next, other embodiments will be described.
上記実施例では、第１筒体と第２筒体とを嵌合
形状に構成したが、第２図に示すように、第１筒
体１４および第２筒体１５の端部にそれぞれフラ
ンジ部２０，２１を設け、これらフランジ部２
０，２１で溶接するように構成してもよい。 In the above embodiment, the first cylindrical body and the second cylindrical body are configured to fit together, but as shown in FIG. 20 and 21 are provided, and these flange portions 2
It may be configured to weld at 0.21.
含浸型陰極構体の陰極基体を加熱するヒータ部
を同軸に接合される一対の筒体で構成し、陰極基
体側に位置する第１筒体に埋込剤がほぼ完全に充
填され、陰極基体から離れて位置する第２筒体に
埋込剤が存在しないように構成したので、埋込剤
の量が一定でかつ脱落を生じない高信頼性かつ高
品位の所要の含浸型陰極構体を容易に製作するこ
とができる。
The heater part that heats the cathode base of the impregnated cathode assembly is composed of a pair of coaxially joined cylinders, and the first cylinder located on the cathode base side is almost completely filled with the embedding agent, and the embedding agent is completely filled with the embedding agent. Since the structure is such that no embedding agent is present in the second cylindrical body located apart, it is possible to easily create a highly reliable and high-quality impregnated cathode structure in which the amount of embedding agent is constant and does not fall off. It can be manufactured.
第１図はこの考案の一実施例である含浸型陰極
構体の断面図、第２図は他の実施例の要部を示す
断面図、第３図は従来の含浸型陰極構体の断面図
である。
１……電子放射面、２……陰極基体、６……ヒ
ータ、１０……ヒータ部、１１……ヒータ容器、
１２……埋込剤、１４……第１筒体、１５……第
２筒体。
Fig. 1 is a sectional view of an impregnated cathode assembly which is an embodiment of this invention, Fig. 2 is a sectional view showing the main parts of another embodiment, and Fig. 3 is a sectional view of a conventional impregnated cathode assembly. be. DESCRIPTION OF SYMBOLS 1... Electron emission surface, 2... Cathode base, 6... Heater, 10... Heater part, 11... Heater container,
12... Implanting agent, 14... First cylindrical body, 15... Second cylindrical body.
Claims (1)
が含浸され一端面を電子放射面とする陰極基体を
備え、この陰極基体の他端側にヒータ容器内に耐
熱絶縁性の埋込剤によりヒータが埋込まれたヒー
タ部が取り付けられた含浸型陰極構体において、 上記ヒータ容器は同軸に接合された一対の筒体
で構成され、上記陰極基体側に位置する第１筒体
に上記埋込剤がほぼ完全に充填され、上記陰極基
体から離れて位置する第２筒体に上記埋込剤が存
在しないように構成されていることを特徴とする
含浸型陰極構体。[Claims for Utility Model Registration] A cathode substrate is provided in which the pores of a high melting point porous metal substrate are impregnated with an electron emitting substance and one end surface serves as an electron emission surface, and the other end of the cathode substrate is provided with a heater container. In an impregnated cathode assembly equipped with a heater part in which a heater is embedded with a heat-resistant insulating embedding material, the heater container is composed of a pair of coaxially joined cylinders, and is located on the cathode base side. An impregnated cathode characterized in that the first cylindrical body is almost completely filled with the embedding agent, and the second cylindrical body located away from the cathode substrate is free of the embedding agent. Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3828485U JPH0439646Y2 (en) | 1985-03-19 | 1985-03-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3828485U JPH0439646Y2 (en) | 1985-03-19 | 1985-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61156149U JPS61156149U (en) | 1986-09-27 |
| JPH0439646Y2 true JPH0439646Y2 (en) | 1992-09-17 |
Family
ID=30545142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3828485U Expired JPH0439646Y2 (en) | 1985-03-19 | 1985-03-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439646Y2 (en) |
-
1985
- 1985-03-19 JP JP3828485U patent/JPH0439646Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61156149U (en) | 1986-09-27 |
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