JPH1116465A - Thermal protector - Google Patents
Thermal protectorInfo
- Publication number
- JPH1116465A JPH1116465A JP9168248A JP16824897A JPH1116465A JP H1116465 A JPH1116465 A JP H1116465A JP 9168248 A JP9168248 A JP 9168248A JP 16824897 A JP16824897 A JP 16824897A JP H1116465 A JPH1116465 A JP H1116465A
- Authority
- JP
- Japan
- Prior art keywords
- movable
- fixed
- nickel
- support plate
- electrode
- 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.)
- Pending
Links
Landscapes
- Thermally Actuated Switches (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、常時閉接点形自己
復帰式サーマルプロテクタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a normally closed contact type self-resetting thermal protector.
【０００２】[0002]
【従来の技術】常時閉接点型自己復帰式サーマルプロテ
クタは、通常、電気機器の電源回路等に接続され、その
電気機器に過大な電流が流れたり、周囲温度が異常に高
くなったときに限り、熱応動素子による反転動作でスイ
ッチ接点を開き、給電を遮断してその電気回路を保護す
る。そして、給電が遮断されると熱応動素子は温度低下
するのでスイッチ接点は閉じて再び給電を再開させる働
きを持つ。したがって、危険防止に役立つだけでなく、
電気機器を常に所定の温度範囲で動作させることができ
る。また、電気機器の異常を報知させることもできる。2. Description of the Related Art A normally closed contact type self-recovering type thermal protector is usually connected to a power circuit of an electric device or the like, and only when an excessive current flows through the electric device or when an ambient temperature becomes abnormally high. The switch contact is opened by the reversal operation of the thermoresponsive element, and the power supply is cut off to protect the electric circuit. When the power supply is cut off, the temperature of the thermoresponsive element decreases, so that the switch contact is closed and the power supply is restarted. Therefore, it not only helps prevent danger,
The electric device can always be operated in a predetermined temperature range. In addition, it is possible to notify an abnormality of the electric device.
【０００３】近年、電気機器のなかでも特にモータ等に
使用される電流容量の比較的大きいサーマルプロテクタ
は、一層の小型化、低コスト化が要求されている。この
ようなサーマルプロテクタは熱応動素子に抵抗値の高い
材料が用いられており、この熱応動素子に大電流が流れ
ると、この熱応動素子は自己発熱によって温度が上昇し
所望の動作電流に達するまでに反転動作によって接点が
開いてしまう。[0003] In recent years, among electrical appliances, a thermal protector having a relatively large current capacity particularly used for a motor or the like has been required to be further reduced in size and cost. In such a thermal protector, a material having a high resistance value is used for the thermal responsive element, and when a large current flows through the thermal responsive element, the temperature of the thermal responsive element increases due to self-heating and reaches a desired operating current. By then, the contact is opened by the reversing operation.
【０００４】この対策として、このような電流容量の比
較的大きいサーマルプロテクタでは、熱応動素子に、で
きる限りの低抵抗な電極材料を使用することが考えられ
る。そして、このようなサーマルプロテクタとして、図
４に示すように、低抵抗な電極材料からなる熱応動素子
１４よりもさらに低抵抗な電極材料からなる可動アーム
１５とを組み合わせた可動電極１６を備えたものが知ら
れている（特開平４−９５３２４号公報）。すなわち大
電流が流れても、抵抗の低い方の可動アーム１５に電流
を分流させることにより、熱応動素子１４の発熱をでき
る限り抑制し、所望の動作電流で接点を開かせようとす
るものである。[0004] As a countermeasure, in such a thermal protector having a relatively large current capacity, it is conceivable to use as low a resistance electrode material as possible for the thermally responsive element. As shown in FIG. 4, the thermal protector includes a movable electrode 16 which is combined with a movable arm 15 made of an electrode material having a lower resistance than the thermally responsive element 14 made of an electrode material having a lower resistance. One is known (JP-A-4-95324). That is, even if a large current flows, the current is shunted to the movable arm 15 having the lower resistance, thereby suppressing the heat generation of the thermally responsive element 14 as much as possible and opening the contact with a desired operating current. is there.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、低抵抗
の電極材料からなる熱応動素子を使用すると、抵抗溶接
による可動アーム１５と熱応動素子１４との固着がきわ
めて難しい問題がある。そのため従来のこの種のサーマ
ルプロテクタは図４に示すように固定電極１７と熱応動
素子１４と可動アーム１５との一体化を図るため、絶縁
樹脂ブロック１８，１９を使用し、樹脂ケース７内でこ
れら固定電極１７、可動アーム１５、熱応動素子１４を
押しつけて固定している。また、その固定には樹脂溶着
による、かしめを行っていた。したがって、従来の構成
では、構成部品点数が多くなるとともに、生産性も悪く
なり低コスト化ができないという問題があった。However, when a thermoresponsive element made of a low-resistance electrode material is used, there is a problem that it is extremely difficult to fix the movable arm 15 and the thermoresponsive element 14 by resistance welding. Therefore, this type of conventional thermal protector uses insulating resin blocks 18 and 19 to integrate the fixed electrode 17, the thermally responsive element 14 and the movable arm 15 as shown in FIG. The fixed electrode 17, the movable arm 15, and the thermoresponsive element 14 are pressed and fixed. In addition, the fixing was performed by caulking by resin welding. Therefore, the conventional configuration has a problem that the number of components is increased, the productivity is deteriorated, and the cost cannot be reduced.
【０００６】本発明は、このような問題を解決するため
になされたもので、低抵抗な電極材料同士の抵抗溶接を
可能にでき、部品点数の削減および生産性の良好なサー
マルプロテクタを提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is intended to provide a thermal protector which can enable low-resistance electrode materials to be resistance-welded, reduce the number of parts, and have good productivity. It is assumed that.
【０００７】[0007]
【課題を解決するための手段】本発明のサーマルプロテ
クタは、一方の面に爪部を有し、かつ他方の面に可動接
点を有する可動アームと、熱によって動作し、かつ一端
部が前記爪部に裕度をもって係止された熱応動素子とか
らなる可動電極と、前記可動電極を支持した可動電極支
持板とを具備し、前記可動アームの一端部が、前記可動
電極支持板に、前記熱応動素子を挟んで抵抗溶接で固定
された構成を有している。SUMMARY OF THE INVENTION A thermal protector according to the present invention has a movable arm having a claw on one surface and a movable contact on the other surface; A movable electrode comprising a thermally responsive element locked with a margin to the portion, and a movable electrode support plate supporting the movable electrode, one end of the movable arm is attached to the movable electrode support plate, It has a configuration fixed by resistance welding with the thermal response element interposed therebetween.
【０００８】これにより、低抵抗な（導電性が大きい）
電極材料同士を抵抗溶接することができ、部品点数の削
減が可能で、生産性の良好な低コストのサーマルプロテ
クタを得ることができる。As a result, low resistance (high conductivity) is obtained.
Electrode materials can be resistance-welded, the number of parts can be reduced, and a low-cost thermal protector with good productivity can be obtained.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態につい
て図１から図３を用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１０】図１および図２に示す本発明の第１の実施
形態であるサーマルプロテクタは、幅６ｍｍ、厚み３ｍ
ｍ、長さ１８ｍｍのケース７内に、可動接点２と可動ア
ーム３と熱応動素子４とからなる可動電極１、およびこ
の可動電極１に対向して設けられた一端部に固定接点５
を有する固定電極６を備えている。The thermal protector according to the first embodiment of the present invention shown in FIGS. 1 and 2 has a width of 6 mm and a thickness of 3 m.
m, a movable electrode 1 comprising a movable contact 2, a movable arm 3, and a thermally responsive element 4 in a case 7 having a length of 18 mm, and a fixed contact 5 provided at one end provided opposite to the movable electrode 1.
Is provided.
【００１１】可動電極１は、一端部を一方の面側に折り
返して形成した爪部８を有する可動アーム３と、この爪
部８に、一端部をわずかの裕度（熱応動素子の厚さの約
２倍）をもって係止された熱によって動作する熱応動素
子４と、可動アーム３の爪部８とは逆の面に設けられた
可動接点２とからなる。The movable electrode 1 has a movable arm 3 having a claw portion 8 formed by folding one end portion to one surface side, and the claw portion 8 has one end provided with a slight margin (thickness of the thermally responsive element). (Approximately twice as large as that of the movable arm 3) and the movable contact 2 provided on the surface opposite to the claw portion 8 of the movable arm 3.
【００１２】可動アーム３は、その他端部を、可動電極
支持板９と固定電極支持板１０とが一体に固定された樹
脂ビード１１の可動電極支持板９に、熱応動素子４を挟
んで抵抗溶接によって固定されている。The other end of the movable arm 3 is connected to the movable electrode support plate 9 of the resin bead 11 in which the movable electrode support plate 9 and the fixed electrode support plate 10 are integrally fixed with the thermally responsive element 4 interposed therebetween. Fixed by welding.
【００１３】可動アーム３の一端部に設けられた可動接
点２は、固定電極６の固定接点５と対向して設けられて
いる。すなわち、熱により熱応動素子４が反転動作する
と、熱応動素子４は可動アーム３に係止されているの
で、可動アーム３も同時に反転動作を行い、可動接点２
は熱応動素子４の動作によって固定接点５と接離する。The movable contact 2 provided at one end of the movable arm 3 is provided to face the fixed contact 5 of the fixed electrode 6. That is, when the heat responsive element 4 reverses operation due to heat, the heat responsive element 4 is locked to the movable arm 3, so the movable arm 3 also performs reverse operation at the same time,
Is brought into contact with and separated from the fixed contact 5 by the operation of the thermoresponsive element 4.
【００１４】固定電極６の他端部は固定電極支持板１０
に溶接により固定されている。樹脂ビード１１の反対側
には可動電極支持板９および固定電極支持板１０の一部
が延出しており、この延出した可動電極支持板９および
固定電極支持板１０には外部リード線１２が接続されて
いる。The other end of the fixed electrode 6 is connected to a fixed electrode support plate 10.
Fixed by welding. A part of the movable electrode support plate 9 and a portion of the fixed electrode support plate 10 extend on the opposite side of the resin bead 11, and the extended movable electrode support plate 9 and the fixed electrode support plate 10 have an external lead wire 12 attached thereto. It is connected.
【００１５】可動電極支持板９には１８〜３５％ＩＡＣ
Ｓ（国際標準軟銅：Ｉｎｔｅｒｎａｔｉｏｎａｌ Ａｎ
ｎｅａｌｅｄ Ｃｏｐｐｅｒ Ｓｔａｎｄａｒｄ）の黄
銅、可動アーム３には４５〜６５％ＩＡＣＳのニッケル
−ベリリウム−銅系、ニッケル−珪素−銅系、ニッケル
−珪素−亜鉛−銅系、鉄−錫−亜鉛−銅系のいずれか一
つからなり、熱応動素子４には、２〜１２％ＩＡＣＳの
ニッケル−モリブデンもしくはクロム−鉄／ニッケル−
鉄系からなるバイメタル、またはニッケル−マンガン−
鉄／ニッケル／ニッケル−鉄系、銅−ニッケル−マンガ
ン／銅もしくは銅−ニッケル／ニッケル−鉄系からなる
トリメタルを用いるのが好ましい。The movable electrode support plate 9 has an 18-35% IAC
S (International standard annealed copper: International An)
The movable arm 3 is made of 45-65% IACS nickel-beryllium-copper, nickel-silicon-copper, nickel-silicon-zinc-copper, iron-tin-zinc-copper. The thermo-responsive element 4 includes nickel-molybdenum or chromium-iron / nickel of 2 to 12% IACS.
Bimetallic iron or nickel-manganese
It is preferable to use a trimetal composed of iron / nickel / nickel-iron, copper-nickel-manganese / copper or copper-nickel / nickel-iron.
【００１６】次に、本発明の第２の実施形態であるサー
マルプロテクタについて説明する。図３に示す本実施形
態のサーマルプロテクタは、図１および図２に示す上記
実施形態において、固定電極６と固定電極支持板１０と
を同一体とした固定電極体１３を用いたものである。す
なわち、上記実施形態では、一端部に固定接点５が配設
された固定電極６を固定電極支持板１０に固定した構成
であったが、本実施形態では、電極間の低抵抗化をさら
に図るため、図３に示すように、固定電極６と固定電極
支持板１０とを同一体とした固定電極体１３が用いられ
ている。この場合、上記実施形態に示す固定電極６と固
定電極支持板１０との接続部の抵抗を除去することがで
き、さらに大電流化を図ることができる。Next, a description will be given of a thermal protector according to a second embodiment of the present invention. The thermal protector of the present embodiment shown in FIG. 3 uses the fixed electrode body 13 in which the fixed electrode 6 and the fixed electrode support plate 10 are the same as the above embodiment shown in FIGS. That is, in the above embodiment, the fixed electrode 6 having the fixed contact 5 provided at one end is fixed to the fixed electrode support plate 10, but in the present embodiment, the resistance between the electrodes is further reduced. Therefore, as shown in FIG. 3, a fixed electrode body 13 in which the fixed electrode 6 and the fixed electrode support plate 10 are the same body is used. In this case, the resistance of the connection between the fixed electrode 6 and the fixed electrode support plate 10 described in the above embodiment can be eliminated, and the current can be further increased.
【００１７】なお、上記各本実施形態では爪部８を、可
動アーム３の一端部を折り返して形成したが、可動アー
ム３の先端中央部に切り起こしたものを用いてもよい。In each of the above embodiments, the claw portion 8 is formed by folding one end of the movable arm 3, but may be formed by cutting and raising the center of the distal end of the movable arm 3.
【００１８】通常、抵抗溶接するには対象となる材料同
士の導電性が大きい（抵抗値が低い）と溶接することが
できない。前述の可動電極支持板９と可動アーム３との
両者を溶接しようとしても、両者は抵抗値が低すぎるた
め溶接抵抗法での固着は困難である。Generally, resistance welding cannot be performed if the materials to be processed have high conductivity (low resistance). When attempting to weld both the movable electrode support plate 9 and the movable arm 3 described above, it is difficult to fix the movable arm support plate 9 and the movable arm 3 by the welding resistance method because both have too low resistance values.
【００１９】しかしながら、両者の間に上述の適度な導
電性を有するバイメタルあるいはトリメタルの熱応動素
子を挟むことにより、抵抗溶接が可能となり、さらに、
サーマルプロテクタとして、十分な溶接強度を保持する
ことができることを確認した。However, by sandwiching the bimetallic or trimetallic thermally responsive element having the appropriate conductivity described above between the two, resistance welding becomes possible.
It was confirmed that sufficient welding strength could be maintained as a thermal protector.
【００２０】上述した電極材料の導電性よりも、さらに
導電性の高いバイメタルもしくはトリメタルを使用して
も、まったく溶接ができないかあるいは、溶接強度が極
端に低下し実用のレベルに達しないことも確認できた。It was also confirmed that even if a bimetal or trimetal having higher conductivity than the electrode material described above was used, welding could not be performed at all or the welding strength was extremely reduced and did not reach a practical level. did it.
【００２１】すなわち、本発明は電極材料の選定と組合
せにより、従来では困難とされていた溶接方式でも、可
動アーム３と熱応動素子４とを可動電極支持板９に固定
できることから、図４に示す従来のサーマルプロテクタ
に用いたこれら可動アーム、熱応動素子、可動電極支持
板を一体化するための樹脂ブロックからなる構成部品を
必要とせず、また樹脂の溶融によるかしめの工程も省く
ことができ、生産性の向上を図ることができ、低コスト
でかつ大電流にも適用可能なサーマルプロテクタを得る
ことができるものである。That is, according to the present invention, the movable arm 3 and the thermally responsive element 4 can be fixed to the movable electrode support plate 9 by the selection and combination of the electrode materials, even in a welding method which has been difficult in the past, as shown in FIG. This eliminates the need for a component consisting of a resin block for integrating the movable arm, the thermally responsive element, and the movable electrode support plate used in the conventional thermal protector shown, and eliminates the caulking process due to melting of the resin. Further, it is possible to obtain a thermal protector which can improve productivity, is low in cost, and can be applied to a large current.
【００２２】[0022]
【発明の効果】以上のように、本発明は、可動アーム、
熱応動素子、可動電極支持板の適切な材料選定により、
従来では困難とされていた溶接方式でも、可動アーム、
熱応動素子、可動電極支持板を一体化することができ、
従来品に比較して構成部品の削減、生産性の向上を図る
ことができ、低コストでかつ大電流にも適応可能なサー
マルプロテクタを得ることができるものである。As described above, the present invention provides a movable arm,
By selecting appropriate materials for the thermally responsive element and the movable electrode support plate,
Even with the welding method that was conventionally difficult, the movable arm,
Thermal response element, movable electrode support plate can be integrated,
Compared with the conventional product, the number of components can be reduced and the productivity can be improved, and a thermal protector which can be adapted to a large current at a low cost can be obtained.
【図１】本発明の第１の実施形態であるサーマルプロテ
クタの一部切欠正面図FIG. 1 is a partially cutaway front view of a thermal protector according to a first embodiment of the present invention.
【図２】同じくサーマルプロテクタの一部切欠側面図FIG. 2 is a partially cutaway side view of the thermal protector.
【図３】本発明の第２の実施形態であるサーマルプロテ
クタの一部切欠正面図FIG. 3 is a partially cutaway front view of a thermal protector according to a second embodiment of the present invention.
【図４】従来のサーマルプロテクタの一部切欠正面図FIG. 4 is a partially cutaway front view of a conventional thermal protector.
１ 可動電極 ２ 可動接点 ３ 可動アーム ４ 熱応動素子 ５ 固定接点 ６ 固定電極 ７ ケース ８ 爪部 ９ 可動電極支持板 １０ 固定電極支持板 １１ 樹脂ビード DESCRIPTION OF SYMBOLS 1 Movable electrode 2 Movable contact 3 Movable arm 4 Thermal response element 5 Fixed contact 6 Fixed electrode 7 Case 8 Claw 9 Movable electrode support plate 10 Fixed electrode support plate 11 Resin bead
Claims (3)
可動接点を有する可動アームと、熱によって動作し、か
つ一端部が前記爪部に裕度をもって係止された熱応動素
子とからなる可動電極と、前記可動電極を支持した可動
電極支持板とを具備し、前記可動アームの一端部が、前
記可動電極支持板に、前記熱応動素子を挟んで抵抗溶接
で固定されていることを特徴とするサーマルプロテク
タ。A movable arm having a claw on one surface and a movable contact on the other surface; and a thermally responsive arm which is operated by heat and one end of which is locked with a margin to the claw. A movable electrode comprising an element, and a movable electrode support plate supporting the movable electrode, one end of the movable arm is fixed to the movable electrode support plate by resistance welding with the thermally responsive element interposed therebetween. A thermal protector characterized by:
つ他方の面に可動接点を有する可動アームと、熱によっ
て動作し、かつ一端部が前記爪部に裕度をもって係止さ
れた熱応動素子とからなる可動電極と、前記可動電極に
対向して設けられ、かつ前記熱応動素子の動作によって
前記可動接点と接離する固定接点が一端部に設けられた
固定電極と、可動電極支持板と固定電極支持板とが固定
された樹脂ビードとを具備し、前記固定電極の他端部
が、前記固定電極支持板に固定されているとともに、前
記可動アームの一端部が、前記樹脂ビードの前記可動電
極支持板に、前記熱応動素子を挟んで抵抗溶接で固定さ
れていることを特徴とするサーマルプロテクタ。2. A movable arm having a claw on one surface and a movable contact on the other surface in a case, and is actuated by heat and has one end locked to the claw with a margin. A movable electrode composed of a thermally responsive element, and a fixed electrode provided at one end with a fixed contact provided opposite to the movable electrode and separated from and separated from the movable contact by the operation of the thermally responsive element, A movable electrode support plate and a resin bead to which the fixed electrode support plate is fixed are provided, and the other end of the fixed electrode is fixed to the fixed electrode support plate, and one end of the movable arm is A thermal protector fixed to the movable electrode support plate of the resin bead by resistance welding with the thermally responsive element interposed therebetween.
ＣＳの黄銅、前記可動アームが４５〜６５％ＩＡＣＳの
ニッケル−ベリリウム−銅系、ニッケル−珪素−銅系、
ニッケル−珪素−亜鉛−銅系、鉄−錫−亜鉛−銅系のい
ずれか一つからなり、前記熱応動素子が２〜１２％ＩＡ
ＣＳのニッケル−モリブデンもしくはクロム−鉄／ニッ
ケル−鉄系からなるバイメタル、またはニッケル−マン
ガン−鉄／ニッケル／ニッケル−鉄系、銅−ニッケル−
マンガン／銅もしくは銅−ニッケル／ニッケル−鉄系か
らなるトリメタルであることを特徴とする請求項１から
請求項２のいずれかに記載のサーマルプロテクタ。3. The method according to claim 1, wherein the movable electrode support plate has an IA of 18 to 35%.
CS brass, nickel-beryllium-copper system, nickel-silicon-copper system with a movable arm of 45-65% IACS,
Nickel-silicon-zinc-copper or iron-tin-zinc-copper, wherein the thermally responsive element is 2 to 12% IA
Bimetal composed of nickel-molybdenum or chromium-iron / nickel-iron system of CS, or nickel-manganese-iron / nickel / nickel-iron system, copper-nickel-
3. The thermal protector according to claim 1, wherein the thermal protector is a trimetal made of manganese / copper or copper-nickel / nickel-iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168248A JPH1116465A (en) | 1997-06-25 | 1997-06-25 | Thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168248A JPH1116465A (en) | 1997-06-25 | 1997-06-25 | Thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1116465A true JPH1116465A (en) | 1999-01-22 |
Family
ID=15864508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9168248A Pending JPH1116465A (en) | 1997-06-25 | 1997-06-25 | Thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1116465A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56114227A (en) * | 1980-02-12 | 1981-09-08 | Idec Izumi Corp | Method of manufacturing contact member |
| JPS60185325A (en) * | 1984-03-02 | 1985-09-20 | 松下電器産業株式会社 | Thermal protector |
| JPS61159289A (en) * | 1984-12-28 | 1986-07-18 | Kobe Steel Ltd | Electric resistance welding method |
| JPH01204324A (en) * | 1988-02-09 | 1989-08-16 | Matsushita Electric Ind Co Ltd | Thermal protector |
| JPH01302628A (en) * | 1988-05-30 | 1989-12-06 | Texas Instr Japan Ltd | Switch device |
| JPH0344844U (en) * | 1989-09-07 | 1991-04-25 | ||
| JPH03179622A (en) * | 1986-09-08 | 1991-08-05 | Res Inst Electric Magnetic Alloys | Lead switch |
| JPH0495324A (en) * | 1990-07-31 | 1992-03-27 | Matsushita Electric Ind Co Ltd | Thermal protector |
| JPH08325681A (en) * | 1985-04-26 | 1996-12-10 | Olin Corp | Production of copper-based alloy having improved combinationof ultimate tensile strength, electrical conductivity and stress relaxation resistance |
-
1997
- 1997-06-25 JP JP9168248A patent/JPH1116465A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56114227A (en) * | 1980-02-12 | 1981-09-08 | Idec Izumi Corp | Method of manufacturing contact member |
| JPS60185325A (en) * | 1984-03-02 | 1985-09-20 | 松下電器産業株式会社 | Thermal protector |
| JPS61159289A (en) * | 1984-12-28 | 1986-07-18 | Kobe Steel Ltd | Electric resistance welding method |
| JPH08325681A (en) * | 1985-04-26 | 1996-12-10 | Olin Corp | Production of copper-based alloy having improved combinationof ultimate tensile strength, electrical conductivity and stress relaxation resistance |
| JPH03179622A (en) * | 1986-09-08 | 1991-08-05 | Res Inst Electric Magnetic Alloys | Lead switch |
| JPH01204324A (en) * | 1988-02-09 | 1989-08-16 | Matsushita Electric Ind Co Ltd | Thermal protector |
| JPH01302628A (en) * | 1988-05-30 | 1989-12-06 | Texas Instr Japan Ltd | Switch device |
| JPH0344844U (en) * | 1989-09-07 | 1991-04-25 | ||
| JPH0495324A (en) * | 1990-07-31 | 1992-03-27 | Matsushita Electric Ind Co Ltd | Thermal protector |
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