| 摘要 |
<p>1,057,512. Pure fluid amplifiers. PITNEYBOWES, Inc. Nov. 5, 1965 [Nov. 25, 1964], No.46977/65. Heading G3H. A pure fluid switch comprises a main flow passage 33 from which branch passages 37, 38 lead at an angle of between 15 and 45 degrees to the main passage, the passages being of uniform cross-section. Signal ports 45, 46 are provided at right angles to the branch passages 37, 28 and downstream of the point of intersection. When pressure fluid is supplied to the inlet 34 of the passage 33 the flow will divide between the passage 33 and one of the branch passages, say 37. To switch the flow from passage 37 to passage 38, pressure is applied at above a predetermined value to port 45 or suction is applied at 46. The flow may also be switched by interrupting the main flow and applying a pressure at 45 below the predetermined value and then re-establishing the main supply. The interruption of the main flow may be achieved by blocking the outlet of passage 33 or by applying a pressure signal through a port 54.</p> |
