| 摘要 |
Apparatus for obtaining certain characteristics of an article (60, 62), the apparatus including an electromagnet inductor (10, 30) with a first end (20, 54) and a second end (20, 54) with an air gap (24, 58) therebetween, there being at least one arm (12, 32, 34) joining the first end (20) and the second end (20) having electrical windings (14, 52) to generate a magnetic flux in the air gap (24, 58), the arm (12, 32, 34) being a fixed return path for the magnetic flux.
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