JPH0799655B2 - Composite electrical contact - Google Patents
Composite electrical contactInfo
- Publication number
- JPH0799655B2 JPH0799655B2 JP62001418A JP141887A JPH0799655B2 JP H0799655 B2 JPH0799655 B2 JP H0799655B2 JP 62001418 A JP62001418 A JP 62001418A JP 141887 A JP141887 A JP 141887A JP H0799655 B2 JPH0799655 B2 JP H0799655B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- silver
- base material
- hardness
- rivet
- 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
- 239000002131 composite material Substances 0.000 title claims description 40
- 239000000463 material Substances 0.000 claims description 60
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- PSCIKKFYFNJDPV-UHFFFAOYSA-N [O-2].[In+3].[Sn+2]=O.[Ag+].[O-2].[O-2] Chemical compound [O-2].[In+3].[Sn+2]=O.[Ag+].[O-2].[O-2] PSCIKKFYFNJDPV-UHFFFAOYSA-N 0.000 claims 1
- 238000002788 crimping Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- -1 silver-silver oxide-indium oxide Chemical compound 0.000 claims 1
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 10
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 10
- 229910000881 Cu alloy Inorganic materials 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910006404 SnO 2 Inorganic materials 0.000 description 5
- 229910001923 silver oxide Inorganic materials 0.000 description 5
- 229910017944 Ag—Cu Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910017937 Ag-Ni Inorganic materials 0.000 description 1
- 229910017984 Ag—Ni Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Contacts (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、冷間複合リベット形電気接点に関するもの
である。TECHNICAL FIELD The present invention relates to a cold composite rivet type electrical contact.
従来の技術 一般に電気接点としては、銀及銀合金、銀−金属酸化物
合金などの、接点材料のみからなる、単体電気接点であ
る。ムクリベット形（第２図）と、第３図に示すような
接点材Ａと銅もしくは、銅合金などのベース材Ｂと接合
して構成された複合電気接点とがある。2. Description of the Related Art Generally, an electric contact is a single electric contact made of only a contact material such as a silver and silver alloy or a silver-metal oxide alloy. There are a mukurivet type (Fig. 2) and a composite electric contact constituted by joining a contact material A and a base material B such as copper or a copper alloy as shown in Fig. 3.
しかし従来の複合接点においてＡg,Ag−Ｎi５〜20％、
Ａg−Ｃu５〜15％、Ａg−ＣdO8〜13.5％などの接点材は
いずれもビッカース硬度（Ｈv）80以下の硬さを有して
おり、これとベース材として、加工率50〜70％を加えて
加工した銅ワイヤーとを組合せ、接点材Ａとベース材Ｂ
とが同一硬さ又は、少し銅ワイヤーの硬さを増した、冷
間複合リベット形接点は、形状的にも接合強度的にも問
題はなかった。However, in the conventional composite contact, Ag, Ag-Ni 5-20%,
Contact materials such as Ag-Cu 5-15% and Ag-CdO8-13.5% all have a Vickers hardness (Hv) of 80 or less, and as a base material, a processing rate of 50-70% is added. Combined with the copper wire processed by the above, contact material A and base material B
The cold-composite rivet-type contact in which the same hardness as the above or the hardness of the copper wire was slightly increased had no problem in terms of shape and bonding strength.
発明が解決しようとする問題点 しかし、近年接点材Ａに耐溶着性と省銀の要請があり、
Ａg−ＣdＯ系からＡg−ＳnＯ−Ｉn2O3＋α系のカドミレ
ス材の出現により焼鈍後の硬さＨv95〜125の接点材と銅
ワイヤーとの複合接点の製造が試みられ、銅ワイヤーの
硬度を接点材のそれに近づけるために加工率の程度を90
％にあげると、銅ワイヤーの硬さはＨv100〜110となる
が、接点材と銅ベース材との硬さのバランスが変化する
ことにより、接点材が第４図のように中央部が厚く、外
周部は薄い形状のものにならざるを得ず、したがって接
点材の節約もまた困難である。又、上記のカドミレス材
を省銀化して0.3mm厚さ位に少なくし、且つ、均一にす
ると、接点強度が大幅に低下し、脱落事故の発生要因と
なる。Problems to be Solved by the Invention However, in recent years, the contact material A is required to have welding resistance and silver saving,
With the advent of Ag-CdO system to Ag-SnO-In 2 O 3 + α system cadmiumless materials, an attempt was made to manufacture a composite contact between a contact material having a hardness of Hv95-125 after annealing and a copper wire. In order to make it closer to that of the contact material, the degree of processing rate is set to 90.
%, The hardness of the copper wire is Hv100-110, but the contact material has a thick central portion as shown in FIG. 4 due to the change in the hardness balance between the contact material and the copper base material. The outer peripheral part must be thin, and it is therefore difficult to save the contact material. Further, if the above-mentioned cadmium-free material is silver-reduced to a thickness of about 0.3 mm and the thickness is made uniform, the contact strength is greatly reduced, which causes a dropout accident.
問題点を解決するための手段及び作用 そこで本発明者らは上記の問題点を解決すべく種々研究
の結果、Ａg−Ｃu合金ワイヤーと硬さＨv90〜125の銀−
酸化物系のカドミレス接点材を組合せて、冷間接合する
ことにより硬さのバランスがほぼ同一か又はＡg−Ｃu合
金ワイヤー側に加工率５〜15％を加えることで、少し硬
くし、これらを冷間複合ヘッダーにより第１成形、第２
成形の通常方式により、成形加工すれば、強度のある複
合リベット形接点が得られ、カドミレス材の厚さを薄く
しても、第１図の様なＲ面に平行の取れたフロー形状の
接点が得られること、及びさらに本接点はカシメ後に可
動側２層両面接点として、カドミレス接点側は耐溶着接
点として高負荷側に使用することが出来ることを知見し
たのである。Means and Actions for Solving the Problems Then, the inventors of the present invention have conducted various researches to solve the above problems, and as a result, Ag-Cu alloy wire and silver having a hardness of Hv90 to 125-
The oxide-based cadmiumless contact materials are combined and cold-bonded so that the balance of hardness is almost the same, or a processing rate of 5 to 15% is added to the Ag-Cu alloy wire side to make them a little harder. Cold forming header, 1st molding, 2nd
If the molding process is performed by the normal molding method, a strong composite rivet type contact can be obtained, and even if the thickness of the cadmium-less material is thin, the contact with a flow shape parallel to the R surface as shown in FIG. Furthermore, it has been found that this contact can be used on the high load side as the movable side two-layer double-sided contact after caulking and the cadmiumless contact side as a welding resistant contact.
本発明は上記知見に基いて得られたものであって、従っ
て本発明は、銅含有量が４〜35重量％で残部銀からなる
銀銅合金ワイヤーと、ビッカース硬度90ないし125の特
性をもつ銀−酸化物系接点ワイヤーを組合せ、冷間複合
ヘッダー機でリベット接点に成形、加工してなることを
特徴とする複合電気接点である。The present invention has been made based on the above findings. Therefore, the present invention has a silver-copper alloy wire having a copper content of 4 to 35% by weight and a balance of silver and a Vickers hardness of 90 to 125. It is a composite electrical contact characterized by combining silver-oxide type contact wires and forming and processing into a rivet contact with a cold composite header machine.
本発明の複合電気接点において、ベース材としての銀銅
合金ワイヤー中の銅含有量を前述のように限定した理由
は、銀−酸化物系接点材と組合せた場合に、上記銅含有
量が４％未満では接点材との硬度上のバランスが得られ
ず、一方銅含有量が35％を超えると接点材との良好な冷
間圧着性が得られないので銀銅合金ワイヤー中の銅含有
量を４〜35％と定めた。In the composite electrical contact of the present invention, the reason why the copper content in the silver-copper alloy wire as the base material is limited as described above is that the copper content is 4 when combined with the silver-oxide-based contact material. %, The hardness balance with the contact material cannot be obtained. On the other hand, if the copper content exceeds 35%, good cold pressure bonding property with the contact material cannot be obtained, so the copper content in the silver-copper alloy wire Was defined as 4 to 35%.
なお、上記銀−酸化物系接点材の硬さに応じて、それぞ
れ銀銅合金ワイヤー中の銅含有量を４〜21％および21超
〜35％の範囲に選定することによって接点材とベース材
の硬度上のバランスが確保され、しかも前者を用いた複
合接点は比較的低負荷容量の場合に、後者は高負荷容量
の場合に好都合に使用することができる。The contact material and the base material are selected by selecting the copper content in the silver-copper alloy wire in the range of 4 to 21% and in the range of more than 21 to 35% according to the hardness of the silver-oxide type contact material. A balance of hardness is secured, and the composite contact using the former can be conveniently used when the load capacity is relatively low, and the latter can be conveniently used when the load capacity is high.
次に、この発明の複合電気接点を、実施例ならびに比較
例により、具体的に説明する。Next, the composite electrical contact of the present invention will be specifically described with reference to Examples and Comparative Examples.
実施例 １ 硬さがＨv110で1.9mmφの銀−銅10％合金ワイヤーと、
硬さがＨv100で1.9mmφのＡg91％−（ＳnO2−Ｉn2O3＋
α）９％合金ワイヤーを使用、冷間複合ヘッダー機で、
接点部厚さ0.5mmの複合リベット形接点を製造し、第５
図の形状の接点を得た。Example 1 A silver-copper 10% alloy wire having a hardness of Hv110 and 1.9 mmφ,
Ag91% of 1.9mmφ in hardness Hv100 - (SnO 2 -In 2 O 3 +
α) Using a 9% alloy wire, with a cold composite header machine,
We manufacture a composite rivet type contact with a contact thickness of 0.5 mm, and
A contact having the shape shown in the figure was obtained.
実施例 ２ 硬さがＨv110で1.9mmφの銀−銅10％合金ワイヤーと、
硬さがＨv100で1.9mmφのＡg91％−（ＳnO2−Ｉn2O3＋
α）９％合金ワイヤーを使用、冷間複合ヘッダー機で、
接点部厚さ0.3mmの複合リベット形接点を製造し、第６
図の形状の接点を得た。Example 2 A silver-copper 10% alloy wire having a hardness of Hv110 and 1.9 mmφ,
Ag91% of 1.9mmφ in hardness Hv100 - (SnO 2 -In 2 O 3 +
α) Using a 9% alloy wire, with a cold composite header machine,
Manufactured a composite rivet type contact with a contact thickness of 0.3 mm,
A contact having the shape shown in the figure was obtained.
実施例 ３ 硬さがＨv125で1.9mmφの銀−銅30％合金ワイヤーと、
硬さがＨv115で1.9mmφのＡg86％−（ＳnO2−Ｉn2O3＋
α）14％合金ワイヤーを使用、冷間複合ヘッダー機で、
接点部厚さ0.5mmの複合リベット形接点を製造し、第５
図の形状の接点を得た。Example 3 A silver-copper 30% alloy wire having a hardness of Hv125 and 1.9 mmφ,
Ag86% of 1.9mmφ in hardness Hv115 - (SnO 2 -In 2 O 3 +
α) Using a 14% alloy wire, with a cold composite header machine,
We manufacture a composite rivet type contact with a contact thickness of 0.5 mm, and
A contact having the shape shown in the figure was obtained.
実施例 ４ 硬さがＨv115で1.9mmφの銀−銅30％合金ワイヤーと、
硬さがＨv115で1.9mmφのＡg86％−（ＳnO2−Ｉn2O3＋
α）14％合金ワイヤーを使用、冷間複合ヘッダー機で、
接点部厚さ0.3mmの複合リベット形接点を製造し、第６
図の形状の接点を得た。Example 4 A silver-copper 30% alloy wire having a hardness of Hv115 and 1.9 mmφ,
Ag86% of 1.9mmφ in hardness Hv115 - (SnO 2 -In 2 O 3 +
α) Using a 14% alloy wire, with a cold composite header machine,
Manufactured a composite rivet type contact with a contact thickness of 0.3 mm,
A contact having the shape shown in the figure was obtained.
比較例 １ 硬さがＨv80で1.9mmφのタフピッチ銅（加工率70％）ワ
イヤーと、硬さがＨv100で1.9mmφのＡg91％−（ＳnO2
−Ｉn2O3＋α）９％合金ワイヤーを使用、冷間複合ヘッ
ダー機で、接点部厚さ0.5mmの複合リベット接点を製造
し、第７図の形状の接点を得た。Comparative Example 1 Hardness Hv80 1.9 mmφ tough pitch copper (working rate 70%) wire and hardness Hv100 1.9 mmφ Ag91%-(SnO 2
-In 2 O 3 + α) 9% alloy wire was used to manufacture a composite rivet contact with a contact thickness of 0.5 mm using a cold composite header machine, and a contact having the shape shown in FIG. 7 was obtained.
比較例 ２ 硬さがＨv110で1.9mmφのタフピッチ銅（加工率90％）
ワイヤーと、硬さがＨv115で1.9mmφのＡg86％−（ＳnO
2−Ｉn2O3＋α）14％合金ワイヤーを使用、冷間複合ヘ
ッダー機で、接点部厚さ0.5mmの複合リベット接点を製
造し、第８図の形状の接点を得た。Comparative Example 2 Tough pitch copper with hardness of Hv110 and 1.9 mmφ (working rate 90%)
Wire and hardness of Hv115 1.9mmφ Ag86%-(SnO
2-In 2 O 3 + α) 14% alloy wire was used to manufacture a composite rivet contact with a contact thickness of 0.5 mm using a cold composite header machine, and a contact having the shape shown in FIG. 8 was obtained.
以上の実施例および比較例から得られた６種の接点につ
いて行った接合強度試験の結果を第１表に示す。この試
験は第９図（ａ図は側面図、ｂ図は平面図である）に示
したようにリベット型の外径を足径の範囲まで圧壊した
ときの接点材とベース材との離れ具合をクラッシュ開口
率％の大小により接合強度を判定したものである。Table 1 shows the results of the joint strength test conducted on the six types of contacts obtained from the above Examples and Comparative Examples. In this test, as shown in FIG. 9 (a is a side view, b is a plan view), the contact material and the base material are separated from each other when the outer diameter of the rivet type is crushed to the range of the foot diameter. The joint strength was judged by the size of the crash opening ratio%.
第１表の結果からわかるように、ベース材としてＡg−
Ｃu合金ワイヤーを使用した本発明複合接点は開口率が
わずかで安定しているのに対し、タフピッチ銅ワイヤー
を使用した比較例の接点は接点材とベース材の接合が不
安定であって、参考値として併記した剪断強度（接点材
とベース材の接合面を剪断面とした）でも本発明の接点
に比し極めて低いものであった。 As can be seen from the results in Table 1, Ag-as the base material
The composite contact of the present invention using the Cu alloy wire has a small aperture ratio and is stable, whereas the contact of the comparative example using the tough pitch copper wire has unstable bonding between the contact material and the base material. The shear strength described together as a value (the joint surface between the contact material and the base material was taken as the shear plane) was also extremely low as compared with the contact of the present invention.
次に上記６種の接点のハクリと寿命の関係を調べた電気
試験結果を第２表に示す。Next, Table 2 shows the electric test results for examining the relationship between the peeling and the life of the above 6 types of contacts.
第２表の結果からわかるように、タフピッチ銅ワイヤー
を用いたものは本発明接点の寿命に比べて少なくとも40
％寿命が短く、一方Ａg−Ｃu合金ワイヤーを用いた本発
明接点は安定性にすぐれていることが明らかである。 As can be seen from the results in Table 2, those using tough pitch copper wire are at least 40 times longer than the life of the contact of the present invention.
It is clear that the% contact life is short, while the contacts of the present invention using Ag-Cu alloy wire are excellent in stability.
発明の効果 以上説明したように、本発明の複合電気接点は硬さＨv9
0〜125の特性をもつ銀−酸化物系接点材に配する銅含有
量が４〜35％の銀銅合金ベース材を組合せて構成されて
いるので、接点材とベース材との硬さのバランスが確保
されているため、接点材とベース材との冷間圧着性が安
定しており、剪断強度および耐溶着性にすぐれている。
しかもカシメ後、カドミレス接点側は耐溶着接点として
高負荷側に、銀銅合金ベース材側は低負荷側に、可動側
２層両面接点として使用できるなどすぐれた性能を有す
る。As described above, the composite electrical contact of the present invention has hardness Hv9.
Since the silver-oxide contact material having the characteristics of 0 to 125 is composed by combining the silver-copper alloy base material with the copper content of 4 to 35%, the hardness of the contact material and the base material is Since the balance is secured, the cold pressure bonding property between the contact material and the base material is stable, and the shear strength and the welding resistance are excellent.
Moreover, after caulking, the cadmium-less contact side can be used as a welding-resistant contact on the high load side, the silver-copper alloy base material side can be used on the low load side, and can be used as a movable side double-layer double-sided contact.
第１図は、本発明複合電気接点の代表的な形状を示す側
面断面図である。第２図および第３図は、一般のリベッ
ト形単体電気接点および複合電気接点の形状を示す側面
断面図である。 第４図は、銀−酸化物系カドミレス接点材と極端に加工
率を上げた銅ワイヤーとの組合せによる複合電気接点の
例を示す側面断面図である。 第５図は、本発明実施例１及び３で得られた複合電気接
点の側面断面図、第６図は同じく実施例２及び４で得ら
れた複合電気接点の側面断面図である。 第７図及び第８図は、それぞれ比較例１及び２で得られ
た複合電気接点の側面断面図である。 第９図は、リベット形複合電気接点の接合強度試験の要
領を示すもので、（ａ）は同リベット形の外径を足径ま
で圧壊した状態の側面図を、（ｂ）はその平面図であ
る。なお、上記第１〜８図において、Ａは接点材部分
を、Ｂはベース材部分を示すものである。FIG. 1 is a side sectional view showing a typical shape of the composite electrical contact of the present invention. 2 and 3 are side cross-sectional views showing the shapes of general rivet type single electrical contacts and composite electrical contacts. FIG. 4 is a side sectional view showing an example of a composite electrical contact formed by combining a silver-oxide cadmiumless contact material and a copper wire having an extremely increased processing rate. FIG. 5 is a side sectional view of the composite electric contacts obtained in Examples 1 and 3 of the present invention, and FIG. 6 is a side sectional view of the composite electric contacts obtained in Examples 2 and 4 of the present invention. FIG. 7 and FIG. 8 are side cross-sectional views of the composite electric contacts obtained in Comparative Examples 1 and 2, respectively. FIG. 9 shows a procedure for a joint strength test of a rivet-type composite electrical contact. (A) is a side view in which the outer diameter of the rivet type is crushed to the foot diameter, and (b) is a plan view thereof. Is. In FIGS. 1 to 8, A indicates a contact material portion and B indicates a base material portion.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−143907（ＪＰ，Ａ) 特開 昭60−100312（ＪＰ，Ａ) 特開 昭54−7157（ＪＰ，Ａ) 特開 昭57−134532（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 61-143907 (JP, A) JP 60-100132 (JP, A) JP 54-7157 (JP, A) JP 57- 134532 (JP, A)
Claims (4)
材と接点材が冷間圧着され、ベース材が銅を４〜35重量
％含み残部が銀からなる組成の合金から構成され、接点
材が銀−酸化銀−酸化インジウム系材であり、且つ、 ベース材部硬度が、接点材部硬度と同じか、若しくは、 ベース材部硬度が、接点材部硬度より高いことを特徴と
する リベット形複合電気接点。1. A rivet-type composite electric contact, wherein a base material and a contact material are cold-pressed, the base material being composed of an alloy having a composition of 4 to 35% by weight of copper and the balance being silver, and the contact material. Is a silver-silver oxide-indium oxide-based material, and the base material part hardness is the same as the contact material part hardness, or the base material part hardness is higher than the contact material part hardness. Composite electrical contact.
いるか、若しくは、 ベース材が接点材に向けて中央部が湾曲突出しているこ
とを特徴とする 特許請求の範囲第１項記載のリベット形複合電気接点。2. The press-bonding surface between the base material and the contact material is a flat surface, or the base material is curved and protrudes in the central portion toward the contact material. Rivet type composite electrical contact.
負荷用の接点とする二層両面接点であることを特徴とす
る 特許請求の範囲第１項記載のリベット形複合電気接点。3. A rivet-type composite electrical contact is a two-layer double-sided contact in which the base material side is a low-load contact and the contact material side is a high-load contact. A rivet-type composite electrical contact as set forth in claim 1.
ワイヤーと、 ビッカース硬度が90〜125の銀−酸化錫−酸化インジウ
ム系材のワイヤーとを、 冷間複合ヘッダー加工機にかけてベース材と接点材を圧
着することを特徴とする リベット形複合電気接点の製造方法。4. A cold composite header processing machine is applied with a wire made of an alloy of 4 to 35% by weight of copper and the balance being silver, and a wire of silver-tin oxide-indium oxide material having a Vickers hardness of 90 to 125. A method of manufacturing a rivet-type composite electrical contact, which comprises crimping a base material and a contact material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001418A JPH0799655B2 (en) | 1987-01-07 | 1987-01-07 | Composite electrical contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001418A JPH0799655B2 (en) | 1987-01-07 | 1987-01-07 | Composite electrical contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63170819A JPS63170819A (en) | 1988-07-14 |
| JPH0799655B2 true JPH0799655B2 (en) | 1995-10-25 |
Family
ID=11500918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62001418A Expired - Lifetime JPH0799655B2 (en) | 1987-01-07 | 1987-01-07 | Composite electrical contact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0799655B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3371619B2 (en) * | 1995-05-26 | 2003-01-27 | ミノルタ株式会社 | Image writing device |
| JP5689013B2 (en) * | 2011-04-05 | 2015-03-25 | 日本電産サンキョーシーエムアイ株式会社 | Compound contact |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607328B2 (en) * | 1977-06-16 | 1985-02-23 | 中外電気工業株式会社 | Composite electrical contact using Ag-SnO alloy |
| JPS57134532A (en) * | 1981-02-12 | 1982-08-19 | Chugai Electric Ind Co Ltd | Electrical contact material of silver-tin-bismuth alloy |
| JPS60100312A (en) * | 1984-07-23 | 1985-06-04 | 住友電気工業株式会社 | Composite electrical contact parts |
| JPS61143906A (en) * | 1984-12-17 | 1986-07-01 | 中外電気工業株式会社 | Composite electric contact |
| JPS61143907A (en) * | 1984-12-17 | 1986-07-01 | 中外電気工業株式会社 | Composite electric contact |
-
1987
- 1987-01-07 JP JP62001418A patent/JPH0799655B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63170819A (en) | 1988-07-14 |
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