| 摘要 |
<p>A power amplifying follow-up control apparatus which has a fluid-operated prime mover whose output element can perform translatory or angular movements in response to axial movements of a motion transmitting spindle in a composite housing for two pairs of valves which control the flow of a hydraulic fluid to and from the prime mover. The spindle is threaded to move axially in response to rotation by an electric motor or by hand and to thereby actuate selected valves in the housing in order to regulate the flow of fluid to and from the prime mover whose output member shifts or rotates one or more driven components of a machine tool or the like. The valves which control the outflow of fluid from the prime mover receive such fluid by way of pressure regulating gauges which determine the maximum pressure at which the fluid can enter the respective valves, and the control apparatus employs safety switches which terminate or change the direction of rotation of the spindle when the output member of the prime mover encounters excessive resistance to movement.</p> |
