Copper trolley wire and a method of manufacturing copper trolley wire
AssigneePhelps Dodge Industries, Inc.
InventorsThomas J. Chandler, John Corrado
Life of this patent
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Abstract
Copper trolley wire consisting essentially of at least 99.90% copper and at most 0.10% of a metal selected from the group consisting of silver, cadmium, tellurium, titanium, magnesium, manganese, chromium, zirconium, tin and combinations thereof, has a minimum tensile strength well exceeding that listed in ASTM Standard B47-95a for copper trolley wire. The copper trolley wire has a uniform fine grain size. The copper trolley wire is manufactured using a process of casting a copper rod of the appropriate composition, hot working or "conforming" the cast rod to reduce its diameter, and then cold working it to form the desired wire by drawing it through one or more dies. Preferably, no annealing step is used.
Claims9
A copper trolley wire consisting essentially of at least 99.90% by weight copper and at most 0.10% by weight of a metal selected from the group consisting of silver, cadmium, tellurium, titanium, magnesium, manganese, chromium, zirconium, tin and combinations thereof, and having:
- a tensile strength of at least 10% greater than that required for silver bearing copper trolley wire listed in ASTM B47-95a;
- and
- electrical conductivity at least as great as that listed in ASTM B47-95a.
Copper trolley wire consisting essentially of at least 99.90% by weight copper and at most 0.10% by weight of a metal selected from the group consisting of silver, cadmium, tellurium, titanium, magnesium, manganese, chromium, zirconium, tin and combinations thereof, and having:
- a tensile strength of at least 10% greater than that required for silver bearing copper trolley wire listed in ASTM B47-95a;
- ductility at least as great as that listed in ASTM B47-95a;
- and
- electrical conductivity at least as great as that listed in ASTM B47-95a.
Copper trolley wire consisting essentially of at least 99.90% by weight copper and at most 0.10% by weight of a metal selected from the group consisting of silver, cadmium, tellurium, titanium, magnesium, manganese, chromium, zirconium, tin and combinations thereof, and having.
- a tensile strength of at least 10% greater than that required for silver bearing copper trolley wire listed in ASTM B47-95a;
- and
- electrical conductivity at least as great as that listed in ASTM B47-95a;
- said wire being made by a process comprising:
- a) casting a copper rod consisting essentially of at least 99.90% by weight copper and at most 0.10% by weight of a metal selected from the group consisting of silver, cadmium, tellurium, titanium, magnesium, manganese, chromium, zirconium, tin and combinations thereof,
- b) conforming the copper rod, and
- c) cold working the copper rod into a coil of wire.
Dependencies are inferred from the claim text.