| 摘要 |
<p>PCT No. PCT/FR84/00284 Sec. 371 Date Jun. 13, 1985 Sec. 102(e) Date Jun. 13, 1985 PCT Filed Dec. 4, 1984 PCT Pub. No. WO85/02659 PCT Pub. Date Jun. 20, 1985.Improvement in pneumatic sensors for the control of pneumatic cycles, in which a liquid jet vacuum pump is supplied at the input by a compressed air circuit and connected at the output to a nozzle of which the obturation provokes a rise in pressure in the vacuum pump used as signal for controlling a pneumatic component. The space 4 comprised between the jets 2, 3 of the vacuum pump is connected on the one hand to an output orifice 14 emitting the control signal and on the other hand to an airing valve 13b which, open during the ejection leakage, admits the atmospheric pressure in the space 4, the output 14 and the duct 15 preventing the creation of a depression and which is closed during obturation of the leakage. The invention is used for the control of pneumatic cycles.</p> |
