| 摘要 |
A pneumatic oscillator apparatus having a pressure operated five-way auxiliary valve for reversibly operating a reciprocable fluid operated device, a pressure operated five-way main valve for reversibly applying fluid pressure to the five-way auxiliary valve to reversibly operate the latter, and a pair of three-way pressure operated pilot valves for reversibly operating the main valve, which pilot valves are operated in response to the pressure conditions at the controlled outlet ports of the main valve. Pneumatic control means are provided for regulating exhaust of fluid pressure from the controlled outlet ports of the main valve to control the dwell time of the main valve at each end of its stroke, and to thereby control the frequency of the pneumatic oscillator. An adjustable pressure regulated supply is provided for the auxiliary valve to enable adjustment of the pressure applied to the fluid operated device independent of the pressure applied to the pneumatic oscillator, and additional pneumatic controls are provided for regulating exhaust of fluid from the auxiliary valve to enable independent adjustment of the rate of movement of the fluid operated device in either direction.
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