| 摘要 |
To form a fluidic pressure gauge a pair of back pressure sensor nozzles are mounted in gapped adjacency to the movable ends of respective bellows or diaphragms. One bellows is connected, for example, to communicate with the engine oil pressure while the other communicates with a suitable reference pressure. The output leg of each nozzle is connected to a differential pressure gauge. Another form of the invention yields a nonanalog indication when the oil pressure is outside a certain range. The ends of the bellows are connected together by a pivoting arm which operates a linearly movable slotted bar. An interruptable jet is mounted adjacent the slotted bar and connected to a fluidic logic gate whose outputs operate pneumatic indicators.
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