| 摘要 |
<p>Valves (24) are arranged in a bank (10) for controlling the flow of fluids in a winery, oil refinery or the like, and have all their operating arms (23) in one (x-y) plane. In a plane parallel to, but spaced from, the x-y plane there is provided an x-y plotter (12) which has a projecting pin (22) which can be moved adjacent to a valve arm (23) and rotated by computer control to cause rotation of the valve arm (23) between ''on'' and ''off'' positions. Where the valve (24) is of the type which requires a linear withdrawal of the arm (23) from its stem before rotation can be effected, the valve arm (23) is provided with an abutment plate and one end is withdrawn by operation of the x-y plotter pin (22). A very close control of temperature, time or other requirement can be achieved automatically without requiring the attention of an operator.</p> |
