| 摘要 |
<p>PNEUMATIC TIMER AND SEQUENCER APPARATUS AND SYSTEM The present invention provides improved pneumatic timer apparatus which has a cycle time that is substantially constant over a wide range of air supply pressures. Also, the improved pneumatic timer apparatus of the invention has relatively few working parts and can be ruggedly constructed so that it is highly reliable in operation even in hostile environments and also susceptible to normally available field maintenance.</p> |
