Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2007-05-01
2007-05-01
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S691000, C324S724000
Reexamination Certificate
active
10427473
ABSTRACT:
Apparatus and methods for measuring the electrical resistance of conductive materials are disclosed. In one embodiment, an apparatus includes a housing, and first, second, third, and fourth conductive members projecting outwardly from the housing. The conductive members are engageable with an electrically-conductive material at a plurality of points distributed along a measurement axis. In an alternate embodiment, at least some of the conductive members include a spring-loaded portion such that a contact portion of the conductive member projects outwardly from the housing by a variable distance. In operation, the electrical resistance of the electrically-conductive material is determinable from a known current applied between the first and fourth conductive members, and a voltage measured between the second and third conductive members.
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Erickson Gary C.
Negley Mark A.
Pollack Mark S.
Hirshfeld Andrew H.
Lee & Hayes PLLC
Natalini Jeff
The Boeing Company
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