| 摘要 |
<p>1,099,281. Fluid-pressure servomotor systems. MOLINS ORGANISATION Ltd. Jan.13, 1965 [Jan.14, 1964], No.1618/64. Heading G3P. [Also in Division F2] A valve actuator comprises a plane disc (1), Fig. 1 (not shown) which contacts or is fixed to three valve actuators (2), (3) and (4). The disc is movable in a direction normal to its plane and is tiltable. The force imparted to the actuators is dependant on the point of application of the force to the disc. For example if the actuators are arranged at the corners of an equilateral triangle and on a circle concentric with the disc, a force applied at the centre of the disc is shared equally among the actuators but if the force is applied on a line between two of the actuators, the disc tilts about the third actuator and the force on the two actuators is the reciprocal of the ratio of the distances between the point of application and the two actuators. The actuators may be applied to springs or, as shown, to telemotors. The actuator 2 may be a bellows, Fig.2, connected to a further bellows to actuate a valve 9 controlling the supply and exhaust to a jack 13. The jack 13 acts as the gripping device of an artificial hand to grip an object 15 between the jack and a fixed member 16. A resilient member 21 is carried by the member 16 and the force of the jack is transmitted through a member 17, bellows 18, a fluid link 19 and bellows 20 to recentre the valve 9. An accumulator 22 may be provided in the fluid link or this fluid link may be replaced by a spring. The other two actuators may control servosystems for moving the arm transversely and longitudinally. The jacks may be replaced by rotary motors.</p> |
