| 摘要 |
An orbital tester for detecting flaws in elongated, round metal workpieces, comprising a rotatable face plate having a central opening through which the workpiece passes in longitudinal manner, a pair of probe members having search coils engageable with opposed surfaces of the workpiece, a pair of diametrically opposed main fluid cylinders carried by the face plate and having connection with the probe members to press their search coils into engagement with workpiece surfaces, and further cylinders at the side of said main cylinders. The pistons of the main cylinders have rack and gear connection with the pistons of the side cylinders, the connections being so constructed and arranged that as the pistons in the side cylinders move in one direction, the pistons in the main cylinders move inthe opposite direction.
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