| 摘要 |
<p>With reference to Figure 1, an applied pressure indicator 1 (shown in plan view) comprises a hollow, flexible, closed chamber 2 containing a liquid 3 within its interior 4, a liquid outlet duct 5 extending from the chamber interior 4, and means comprising restrictors 6, 7 for restricting outward passage of liquid 3 within the duct 5. When the flexible chamber 2 is subjected to external pressure, as indicated by arrows 8, the volume of liquid 3 displaced from the chamber 2 into the duct 5 is indicative of the intensity of said pressure. The indicator 1 illustrated is a one-piece component of flexible plastics material, in this example a transparent polyethylene. The liquid is a glycerol gel. <IMAGE></p> |
