| 摘要 |
PCT No. PCT/US82/01602 Sec. 371 Date Jul. 7, 1983 Sec. 102(e) Date Jul. 7, 1983 PCT Filed Nov. 12, 1982 PCT Pub. No. WO83/01833 PCT Pub. Date May 26, 1983.A coating thickness and surface comparator for measuring the thickness of nonmagnetic coatings (28) or roughness on ferromagnetic base materials. A permanent rod magnet (6) and a ferromagnetic rod (16) are supported by nonmagnetic slides (12, 14) parallel to one another. When a standard base (24) is placed at one end (22) of the rod magnet (6) and a coated or roughened base (30) is placed at the other end, the slides (12, 14) are pushed together toward the middle of the rod magnet (6). The coincidence of the slides (12, 14) varies from the middle of the bar magnet (6) in proportion to coating thickness (28) or roughness.
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