| 摘要 |
1404821 Pressure gauges NU-SWIFT INTERNATIONAL Ltd 22 Feb 1973 [8 March 1972] 10672/72 Heading G1L In a method of, or apparatus for, testing a pressure indicator 58 fitted to a pressure vessel 12, such as a fire extinguisher, a pressure chamber 50 is clamped over the gauge by tie bars 54, 56 attached to apertured members 20, 22 associated with "V" shaped cradle members 16, 18, and a pressure is applied to the chamber 50 by a foot pump 80 and any difference in pressure to the chamber 50 relative to that of the vessel 12 should result in a movement of the indicator pointer to show whether or not the indicator is working. The indicator can be observed through a thick glass 60 in the end of the chamber 50. |
