US1229037A - Metal alloy. - Google Patents

Metal alloy. Download PDF

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Publication number
US1229037A
US1229037A US4552615A US4552615A US1229037A US 1229037 A US1229037 A US 1229037A US 4552615 A US4552615 A US 4552615A US 4552615 A US4552615 A US 4552615A US 1229037 A US1229037 A US 1229037A
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US
United States
Prior art keywords
silver
metal alloy
alloy
per cent
cobalt
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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US4552615A
Inventor
Hugh S Cooper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELECTRO METALS PRODUCTS Co
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ELECTRO METALS PRODUCTS Co
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Priority to US4552615A priority Critical patent/US1229037A/en
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Publication of US1229037A publication Critical patent/US1229037A/en
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver

Definitions

  • V My invention appertains to a metal alloy adapted to be used as a substitute for plati-- num in the electrical art, as in coils, magnetos and all vibrating instruments, and the invention consists of a composition of silver and other metals which is ductile, and malle able, and of comparatively high melting point, good electrical conductivity, great hardness, non-oxidizing, and producible at a low cost.
  • compositions of alloys known to me in which silver enters copper is also used butI find that this composition oxidizes very readily making it useless for electrical contact purposes, especially where the contact is exposed to high temperatures and severe usage. I also find that it is not practicable to use silver alone as it is too soft and the melting point islnot high enough.
  • silver is a good electrical conductor and relatively cheap as compared with platinum and when alloyed in proper proportions with other metals as hereinafter described serves as an excellent substitute for platinum.
  • One such composition comprises silver, palladium and cobalt, in substantially the following proportionsi seventy'per cent. of silver, twenty-five per cent. of palladium,'and 'five per cent. of cobalt. Platinum may be substituted for thepalladium with equally good Specification of Letters Patent nickel Application filed August 14, 1915. Serial No. 45,526.
  • An alloy for electrical uses comprising silver and one or more of the metals of the platinum group and a metal of the cobaltgroupin substantially the proportions stated.
  • An alloy for electrical uses conta' silver, palladium, and a metalof the cobaltnickel group in the proportions substantially set forth.
  • An alloy for electrical contact purposes composed of silver, palladium, and cobalt 1n approximately the proportions .stated as to make the alloy hard, heat resisting, nonoxidizing and a good electrical conductor.
  • a metal alloy composed of.-;seventy per cent. of; -silver,'twenty-five per cent. of 'palladiuml and five per cent. cobalt.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Contacts (AREA)

Description

UNITED srAtrEis PA E T OFFICE.
HUGH S. COOPER, F CLEVELAND, OHIO, ASSIGNOR TO THE ELECTED METALS PROD- UCTS COMPANY, OF CLEVELAND, OHIO.
METAL ALLOY.
No Drawing.
To all whom it may concern:
' State of Ohio,
Be it--known that I, HUGH S. Coornn, a citizen of the United States, residing at Cleveland, inthe county of Ouyahoga and have invented certain new and useful Improvements in Metal Alloys, of which the following is a specification.
V My invention appertains to a metal alloy adapted to be used as a substitute for plati-- num in the electrical art, as in coils, magnetos and all vibrating instruments, and the invention consists of a composition of silver and other metals which is ductile, and malle able, and of comparatively high melting point, good electrical conductivity, great hardness, non-oxidizing, and producible at a low cost.
In all compositions of alloys known to me in which silver enters, copper is also used butI find that this composition oxidizes very readily making it useless for electrical contact purposes, especially where the contact is exposed to high temperatures and severe usage. I also find that it is not practicable to use silver alone as it is too soft and the melting point islnot high enough. However, silver is a good electrical conductor and relatively cheap as compared with platinum and when alloyed in proper proportions with other metals as hereinafter described serves as an excellent substitute for platinum. One such composition comprises silver, palladium and cobalt, in substantially the following proportionsi seventy'per cent. of silver, twenty-five per cent. of palladium,'and 'five per cent. of cobalt. Platinum may be substituted for thepalladium with equally good Specification of Letters Patent nickel Application filed August 14, 1915. Serial No. 45,526.
results, and nickel for thecobalt, but I prefer palladium as it may be obtained at a lower cost than platinum. I also prefer cobalt'as I find it resists oxidization at a higher temperature than nickel, and it also makes a harder alloy. In this" alloy I use.
as little of platinum or palladium as possible consistent with the durability and lasting qualities of the product, and I also find that three to five per cent. of cobalt or nickel is suflicient to furnish the hardness necessary.
'What I claim is:
1. An alloy for electrical uses, comprising silver and one or more of the metals of the platinum group and a metal of the cobaltgroupin substantially the proportions stated.
2. An alloy for electrical uses conta' silver, palladium, and a metalof the cobaltnickel group in the proportions substantially set forth.
3. An alloy for electrical contact purposes composed of silver, palladium, and cobalt 1n approximately the proportions .stated as to make the alloy hard, heat resisting, nonoxidizing and a good electrical conductor.
4. A metal alloy composed of.-;seventy per cent. of; -silver,'twenty-five per cent. of 'palladiuml and five per cent. cobalt.
In testimony whereof I HUGH S. COOPER. Witnesses: J. W. FnasER, R. B. .Mosnn.
aflix my signature 7 in presence of two witnesses.
US4552615A 1915-08-14 1915-08-14 Metal alloy. Expired - Lifetime US1229037A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929474A (en) * 1974-08-05 1975-12-30 Williams Gold Refining Co Tarnish resistant silver based dental casting alloy capable of bonding to porcelain
US3929475A (en) * 1974-08-05 1975-12-30 Williams Gold Refining Co Tarnish resistant silver based dental casting alloy having superior improved ductility and work hardening characteristics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929474A (en) * 1974-08-05 1975-12-30 Williams Gold Refining Co Tarnish resistant silver based dental casting alloy capable of bonding to porcelain
US3929475A (en) * 1974-08-05 1975-12-30 Williams Gold Refining Co Tarnish resistant silver based dental casting alloy having superior improved ductility and work hardening characteristics

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