Magnetic sensor wire
AssigneeOlin Corporation
InventorCharles J. McCowen
Life of this patent
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Abstract
There is provided a magnetic device having first and second portions with different magnetic coercivities. A magnetic field is induced in both the first and second portion. When exposed to a sufficiently high external magnetic field, the polarity of the first portion reverses generating a voltage pulse which may be detected by an external sensor. Either the first or second portion, or both, is formed from a copper alloy containing dispersed magnetic phase.
Claims21
A magnetic device capable of generating a voltage pulse when passed through an external magnetic field, comprising:
- a first portion containing from about 5 to about 40% by weight iron, from about 5 to about 40% by weight nickel and the balance copper, said first portion having a magnetic phase dispersed in a predominantly copper matrix and having a first magnetic coercivity;
- and
- a second portion adjacent to said first portion, said second portion having a second magnetic coercivity, said second magnetic coercivity being greater than said first magnetic coercivity.
A magnetic device capable of generating a voltage pulse when passed through an external magnetic field, comprising:
- a first portion having a first magnetic coercivity;
- and
- a second portion bonded to said first portion, said second portion containing from about 5 to about 40% by weight iron, from about 5 to about 40% by weight nickel, up to about 40% by weight of an additive selected from the group consisting of cobalt, chromium, zirconium, magnesium, manganese and mixtures thereof, and the balance copper, said second portion having a magnetic phase dispersed in a predominantly copper matrix and a second magnetic coercivity, said second magnetic coercivity being greater than said first magnetic coercivity.
Dependencies are inferred from the claim text.