GB588652A - Electrical contact materials and contacts and methods of making the same - Google Patents
Electrical contact materials and contacts and methods of making the sameInfo
- Publication number
- GB588652A GB588652A GB5790/45A GB579045A GB588652A GB 588652 A GB588652 A GB 588652A GB 5790/45 A GB5790/45 A GB 5790/45A GB 579045 A GB579045 A GB 579045A GB 588652 A GB588652 A GB 588652A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- silver
- cadmium
- oxide
- metal
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
- H01H1/02374—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te containing as major component CdO
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/95—Consolidated metal powder compositions of >95% theoretical density, e.g. wrought
- Y10S75/951—Oxide containing, e.g. dispersion strengthened
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
- Y10T29/49206—Contact or terminal manufacturing by powder metallurgy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Contacts (AREA)
Abstract
A contact element is formed from a powdered mixture of a metal of good electrical conductivity such as silver, copper, nickel, gold, a metallic oxide such as cadmium oxide, and a metallic salt such as silver iodide, silver bromide, silver chloride, cadmium chloride, cadmium sulphate. The metallic salt is mixed with the cadmium oxide which passes a 325 mesh screen, and the mixture densified by pressure at 40,000-100,000 lbs./sq. inch, or by pressure and sintering at 1,600 DEG F. for one hour. The slugs formed are ground so that all the powder passes a 100 mesh screen, but more than half is retained by a 300 mesh screen. This powder is mixed with the powdered metal, which preferably is Merck's precipitated silver powder, cold moulded at approx. 40,000 lbs./sq. inch, and sintered at 1,600 DEG F. for twenty minutes. The preforms are finally moulded at approx. 100,000 lbs./sq. inch. to form contact elements wherein dense particles of cadmium oxide and metallic salt are jointly embedded in a matrix of conducting metal. Suitable proportions are: from 59.9 per cent.-92.9 per cent. metal of good conductivity, from 7 per cent. to 40 per cent. metallic oxide, from 0.1 per cent. to 10 per cent. metallic salt.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US525606A US2425052A (en) | 1944-03-08 | 1944-03-08 | Electrical contact materials and contacts and methods of making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB588652A true GB588652A (en) | 1947-05-29 |
Family
ID=24093931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5790/45A Expired GB588652A (en) | 1944-03-08 | 1945-03-08 | Electrical contact materials and contacts and methods of making the same |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2425052A (en) |
| GB (1) | GB588652A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509980A (en) * | 1983-05-19 | 1985-04-09 | Chemet Corporation | Electrical contact material comprising silver, cadmium oxide and cupric salt |
| WO2012076281A1 (en) * | 2010-12-06 | 2012-06-14 | Abb Research Ltd | Electrical contact element and an electrical contact |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2572662A (en) * | 1945-07-12 | 1951-10-23 | Cutler Hammer Inc | Electrical contact |
| US2490214A (en) * | 1945-07-19 | 1949-12-06 | Mallory & Co Inc P R | Electrical contacting element |
| US2654945A (en) * | 1948-10-11 | 1953-10-13 | Cutler Hammer Inc | Electrical contact |
| US2760256A (en) * | 1949-11-28 | 1956-08-28 | Linwood T Richardson | Electrical contacts |
| US2760257A (en) * | 1949-12-03 | 1956-08-28 | Cutler Hammer Inc | Electrical contacts |
| US2761943A (en) * | 1952-10-11 | 1956-09-04 | Hellefors Bruks Aktiebolag | Method of transmitting electric current from one body to another |
| US3086285A (en) * | 1957-11-05 | 1963-04-23 | Engelhard Ind Inc | Electrical contacts |
| US2985532A (en) * | 1957-12-05 | 1961-05-23 | Engelhard Ind Inc | Electrical contacts |
| US3075281A (en) * | 1958-10-03 | 1963-01-29 | Engelhard Ind Inc | Method for producing an electrical contact element |
| US3688067A (en) * | 1971-02-08 | 1972-08-29 | Chugai Electric Ind Co Ltd | Composite silver cadmium oxide alloy contact with silver cadium surface |
| US4028063A (en) * | 1974-11-11 | 1977-06-07 | Gte Laboratories Incorporated | Compacts for preparing silver-cadmium oxide alloys |
| US4018599A (en) * | 1975-09-05 | 1977-04-19 | Engelhard Minerals & Chemicals Corporation | Electrical contacts of dispersion strengthened gold |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US313916A (en) * | 1885-03-17 | Fekdinand eugene ca-nda | ||
| US735293A (en) * | 1903-04-15 | 1903-08-04 | Eugen Polte | Process of making articles of wolfram and lead. |
| US1011708A (en) * | 1906-07-02 | 1911-12-12 | Gen Electric | Treating tungsten. |
| US1375879A (en) * | 1918-04-13 | 1921-04-26 | Hugh H Wikle | Brush and method of manufacturing the same |
| US2145690A (en) * | 1937-09-24 | 1939-01-31 | Mallory & Co Inc P R | Electric contact material |
| US2307668A (en) * | 1941-02-01 | 1943-01-05 | Cutler Hammer Inc | Electrical contact |
-
1944
- 1944-03-08 US US525606A patent/US2425052A/en not_active Expired - Lifetime
-
1945
- 1945-03-08 GB GB5790/45A patent/GB588652A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509980A (en) * | 1983-05-19 | 1985-04-09 | Chemet Corporation | Electrical contact material comprising silver, cadmium oxide and cupric salt |
| WO2012076281A1 (en) * | 2010-12-06 | 2012-06-14 | Abb Research Ltd | Electrical contact element and an electrical contact |
Also Published As
| Publication number | Publication date |
|---|---|
| US2425052A (en) | 1947-08-05 |
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