| 摘要 |
<p>1,025,220. Regulating fluid flow. SPERRY RAND CORPORATION. Aug. 14,1964 [Aug. 26, 1963], No.33316/64. Heading G3H. A fluid pulse former comprises a fluid amplifier having a power jet 16 Fig. 1 and control nozzles 26, 28 to direct the jet into outlet passages 20, 22. The passages are connected by channels 44, 46 of different length to the inlet 48 of an output channel 42. If it is assumed that the length of the channels 44, 46 are such that a time delay of two units and three units occurs respectively for the energy to travel along the channels after switching and that the control nozzle supply 26 is an input and the control nozzle supply 28 is a reset, the time chart, Fig. 3, (not shown) illustrates the operation. At time 0, the flow is through channel 44. If at time 1 the jet is switched by supply 26, two units later, the energy from channel 44 will cease at the output but the energy from channel 46 will not reach the output until a further unit thus the output between unit three and four will decrease. If the reset is applied at the beginning of unit five, two units later the energy from channel 44 will reach the output but the energy from channel 46 will not cease until a further unit thus a peak is provided between units seven and eight. The invention may also be used with an amplifier of the borten type or one having only one control nozzle where the power jet normally passes through the shorter channel.</p> |
