| 摘要 |
<p>A hydraulic control valve for controlling copying-milling machines and the like. The movements of the associated machine are controlled by moving a valve plate laterally in one direction or another, relative to the fixed valve body. The edges of the associated ports in the valve plate and the valve body are so shaped that by turning the valve plate, a larger or smaller valve port opening will occur for a given extent of lateral movement of the valve plate relative to the body. A pivoted link chain connecting the valve plate to an actuating knob controls the turning movements of the valve plate, and a conventional stylus or tracer connected to the valve plate controls the lateral movements thereof.</p> |
