1469246 Indicating liquid levels; pressure gauges L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 15 Aug 1974 [17 Aug 1973] 36030/74 Headings G1, H, L [Also in Division F2] A control cock arrangement for a device for measuring pressure differences and designed to prevent damage of the device by extremes of pressure beyond those for which it is designed, comprises two isolating cocks 13, 14 and a balancing cock 15 having operating arms which interact to prevent closure of either of the isolating cocks while the balancing cock is closed and alternatively, closure of the balancing cock while either of the isolating cocks is open. In Fig. 3, isolating cocks 13, 14 are open and can be closed only by clockwise movements of their arms 29, 37. This cannot be effected until cock 15 is opened by anti-clockwise movement of its arms 43, 44. In Fig. 6 cocks 13, 14 are closed and cock 16 is open. Cock 16 cannot be closed until cocks 13, 14 are opened. The device is shown applied to a thermally insulated tank 2 for a cryogenic liquid at high pressure which is connected to a monometer 8 for measuring the height of the liquid in the tank.
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机译：1469246指示液位;压力表L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 1974年8月15日[1973年8月17日]标题G1，H，L [也在F2部中]设备的控制旋塞装置用于测量压差并设计成防止超出极限值的设备因极端压力而损坏设备的装置，包括两个隔离旋塞13、14和一个平衡旋塞15，该平衡旋塞15的操作臂相互作用以防止两个隔离旋塞中的任何一个闭合当平衡阀关闭时，或者在任一隔离阀打开时关闭平衡阀。在图3中，隔离旋塞13、14是打开的，并且只能通过其臂29、37的顺时针运动来关闭。只有在旋塞15通过其臂43、44的逆时针运动而打开时，才能实现隔离。 6个旋塞13、14关闭并且旋塞16打开。在打开旋塞13、14之前，无法关闭旋塞16。示出了该装置应用于用于高压低温液体的绝热箱2，该绝热箱2连接到用于测量箱中液体高度的单向计8。
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