| 摘要 |
In or for an enclosure pressure control system of the type wherein enclosure pressure varying means are operated by fluid pressure signals from a fluidic control pack, a fluid pressure controller or emergency pressure controller comprises an aneroid type capsule operating a valve at a preselected enclosure pressure to bleed away excess fluid pressure signals which would normally operate the pressure varying means, thereby maintaining a controlled pressure within the enclosure should malfunction of the normal fluidic control system occur. The capsule is in a closed chamber which communicates with the enclosure atmosphere through a resistive orifice, and the path of the bled pressure fluid passes through the chamber, whereby the resistive orifice introduces a negative feedback signal. The capsule is supported in the chamber by a spring loaded plunger which is manually actuatable from the exterior of the chamber to provide for ground tests of the device.
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