Apparatus for measuring the surface insulation characteristics of coatings on magnetic materials
AssigneeAllegheny Ludlum Steel Corporation
InventorLayton D. Crytzer
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Abstract
An improved apparatus is disclosed for measuring the surface insulation characteristics of coatings on magnetic materials. This apparatus comprises an insulative button block having a plurality of protruding contact buttons stationarily mounted therein, with each contact button provided with a substantially flat contact surface, and with all contact surfaces lying substantially in the same plane. The apparatus further includes a press for urging the contact surfaces against the coated surface of the magnetic material, the electric circuitry necessary to apply a predetermined voltage potential between the contact surfaces and the magnetic material, and an ammeter to measure the current flow through the coating.
Claims22
An apparatus for measuring the surface insulation characteristics of coatings on magnetic material comprising:
- an insulative button block having a plurality of protruding electrically conductive contact buttons stationarily mounted therein, with each contact button provided with a substantially flat contact surface, and with the contact surfaces lying substantially in the same plane,
- means for pressing the entire button contact surfaces against the coated surface of the magnetic material, said means applies a uniform contact pressure over the entire button surface area and restrains lateral movement of the contact buttons,
- means for applying a voltage potential between the contact surfaces and the magnetic material, and
- means for measuring the current flow through the coating on the magnetic material to determine the surface insulation characteristics of said coating.
Dependencies are inferred from the claim text.