US2268940A - Electric contacting element - Google Patents
Electric contacting element Download PDFInfo
- Publication number
- US2268940A US2268940A US386306A US38630641A US2268940A US 2268940 A US2268940 A US 2268940A US 386306 A US386306 A US 386306A US 38630641 A US38630641 A US 38630641A US 2268940 A US2268940 A US 2268940A
- Authority
- US
- United States
- Prior art keywords
- tellurium
- copper
- electric contacting
- contacting element
- electric
- 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
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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
- H01H1/025—Composite material having copper as the basic material
Definitions
- This invention relates to electric contacting elements of the type comprising welding electrodes, contactor contacts and the like.
- the present application is a division of my co-pending' application Serial No. 329,829, filed April 15,-
- An object of the invention is to improve electric contacting elements such as pressure exerting welding electrodes for resistance Welding, electric contactor contactsand the like.
- the present invention comprises the combination of elements, methods of .manufacture, and the product thereof brought out and exemplified in the disclosure hereinafter set forth, the scope of the invention being indicated inthe appended claims.
- the present invention contemplates electric contacting elements formed of copper alloys containing tellurium and age-hardening ingredients therein. I have found that tellurium imparts to copper and copper alloys a number of desirable properties, particularly low contact resistance and reduced tendency to stick or weld to surfaces with'which electric contact is made. I have also found that tellurium can be added to copper in substantial quantities without greatly reducing its electric conductivity.
- tellurium may be present in amounts from .05 to 3%.
- the age hardening alloy thus formed may be hardened by a suitable heat treatment such as by quenching from a temperature between 600 degrees C. and 1000 degrees C. and subsequently aging at a temperature between 250 degrees C.
- tellurium reduces the electrical conductivity of the copper or copper base alloys only very slightly. This is probably due largely to the fact that tellurium does not form. solid solutions with copper. In fact, it is possible to detect as little as .025% tellurium microscopically as a free phase. This free phase is not pure tellurium, but is an intermetallic com pound of copper and tellurium having the formula CuaTe;
- Y 1 An electric contacting element containing .05 to 3% tellurium, .1-to 10% of an intermetallic compound selected from the group consisting of the phosphides, beryllides, silicides and alumnides of chromium, zirconium, beryllium, titanium, nickel, cobalt, iron and manganeseand the balance substantially all copper.
- an intermetallic compound selected from the group consisting of the phosphides, beryllides, silicides and alumnides of chromium, zirconium, beryllium, titanium, nickel, cobalt, iron and manganeseand the balance substantially all copper.
- An electric contacting element containing .05 to 3% tellurium, .1 to 10% of an intermetallic compound selected from the group consisting of the silicides, phosphides and beryllides of nickel, cobalt, on and manganese and the balance substantially all copper.
Description
Patented Jan. 6, 194 2 NITED' STATES PATENT FFICEQ EEao'rmc CONTACTING- ELEMENT Franz R. Hensel, Indianapolis, Ind., assignor to P. R. Mallory & 00., Inc., Indianapolis, Ind., a
corporation of Delaware Original application April 15, 1940,
No Drawing.
Serial No. 329,829. Divided and this application April 1, 1941, Serial No. 386,306
2 Claims.
This invention relates to electric contacting elements of the type comprising welding electrodes, contactor contacts and the like. The present application is a division of my co-pending' application Serial No. 329,829, filed April 15,-
An object of the invention is to improve electric contacting elements such as pressure exerting welding electrodes for resistance Welding, electric contactor contactsand the like.
Other objects of the invention will be apparent from the following description taken in connec-' tion with the appended claims.
The present invention comprises the combination of elements, methods of .manufacture, and the product thereof brought out and exemplified in the disclosure hereinafter set forth, the scope of the invention being indicated inthe appended claims.
While a preferred embodiment of'the invention is described herein it is contemplated that considerable variation may be made in the methd of procedure and the combination of elements without departing from the spirit of the inven-- tion.
The present invention. contemplates electric contacting elements formed of copper alloys containing tellurium and age-hardening ingredients therein. I have found that tellurium imparts to copper and copper alloys a number of desirable properties, particularly low contact resistance and reduced tendency to stick or weld to surfaces with'which electric contact is made. I have also found that tellurium can be added to copper in substantial quantities without greatly reducing its electric conductivity.
the silicides, phosphides and beryllides of these materials. In these alloys tellurium may be present in amounts from .05 to 3%.
The age hardening alloy thus formed may be hardened by a suitable heat treatment such as by quenching from a temperature between 600 degrees C. and 1000 degrees C. and subsequently aging at a temperature between 250 degrees C.
I and 600 degrees C. for a period of from one-half hour to several hours. The aging not only inv creases the hardness and the annealing temperature but also raises the electrical conductivity and strength. Hence these age-hardened alloys .I introduce the tellurium together with age- I are particularly well suited for pressure exerting resistance welding electrodes.
One of the outstanding advantages of using tellurium with copper and copper alloys resides in the fact that the tellurium, reduces the electrical conductivity of the copper or copper base alloys only very slightly. This is probably due largely to the fact that tellurium does not form. solid solutions with copper. In fact, it is possible to detect as little as .025% tellurium microscopically as a free phase. This free phase is not pure tellurium, but is an intermetallic com pound of copper and tellurium having the formula CuaTe;
While the present invention, as to its objects and advantages, has been described herein as carried out in. specific embodiments thereof, it
- is not desired to be limited thereby but it is intended to cover the invention broadly within the spirit and scope of the appended claims.
What is claimed is: Y 1. An electric contacting element containing .05 to 3% tellurium, .1-to 10% of an intermetallic compound selected from the group consisting of the phosphides, beryllides, silicides and alumnides of chromium, zirconium, beryllium, titanium, nickel, cobalt, iron and manganeseand the balance substantially all copper.
2. An electric contacting element containing .05 to 3% tellurium, .1 to 10% of an intermetallic compound selected from the group consisting of the silicides, phosphides and beryllides of nickel, cobalt, on and manganese and the balance substantially all copper.
-- FRANZ R. HENSEL,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US386306A US2268940A (en) | 1940-04-15 | 1941-04-01 | Electric contacting element |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US329829A US2268938A (en) | 1940-04-15 | 1940-04-15 | Electric contacting element |
| US386306A US2268940A (en) | 1940-04-15 | 1941-04-01 | Electric contacting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2268940A true US2268940A (en) | 1942-01-06 |
Family
ID=26987001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US386306A Expired - Lifetime US2268940A (en) | 1940-04-15 | 1941-04-01 | Electric contacting element |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2268940A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2599002A (en) * | 1948-09-20 | 1952-06-03 | Ampco Metal Inc | Method for working and heat-treating a copper base alloy |
| US3773503A (en) * | 1971-11-04 | 1973-11-20 | American Smelting Refining | Copper base alloy |
| US3928028A (en) * | 1974-04-05 | 1975-12-23 | Olin Corp | Grain refinement of copper alloys by phosphide inoculation |
| US5032358A (en) * | 1989-05-09 | 1991-07-16 | Outokumpu Oy | Resistance welding electrode of chalcogene bearing copper alloy |
| FR2838454A1 (en) * | 2002-04-10 | 2003-10-17 | Clal Msx | Copper-nickel-tin alloy contains tellurium in form of nodules, has high mechanical characteristics for production of mechanical components |
| EP2846035A3 (en) * | 2013-07-26 | 2016-07-06 | Bosch Automotive Products (Changsha) Co., Ltd | Solenoid switch and starter |
-
1941
- 1941-04-01 US US386306A patent/US2268940A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2599002A (en) * | 1948-09-20 | 1952-06-03 | Ampco Metal Inc | Method for working and heat-treating a copper base alloy |
| US3773503A (en) * | 1971-11-04 | 1973-11-20 | American Smelting Refining | Copper base alloy |
| US3928028A (en) * | 1974-04-05 | 1975-12-23 | Olin Corp | Grain refinement of copper alloys by phosphide inoculation |
| US5032358A (en) * | 1989-05-09 | 1991-07-16 | Outokumpu Oy | Resistance welding electrode of chalcogene bearing copper alloy |
| FR2838454A1 (en) * | 2002-04-10 | 2003-10-17 | Clal Msx | Copper-nickel-tin alloy contains tellurium in form of nodules, has high mechanical characteristics for production of mechanical components |
| EP2846035A3 (en) * | 2013-07-26 | 2016-07-06 | Bosch Automotive Products (Changsha) Co., Ltd | Solenoid switch and starter |
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