FLUID-PRESSURE-OPERATED ACTUATORS

    公开(公告)号:GB2138505A

    公开(公告)日:1984-10-24

    申请号:GB8311117

    申请日:1983-04-23

    Abstract: A fluid-pressure-operated actuator is arranged to have three set positions and preferably a fail-safe characteristic in one of the three positions. In one embodiment an H-section piston moves in an actuator body and is set in its two extreme positions by fluid pressure introduced behind the web of the piston through one or other of spindles having heads and bores. To set the intermediate position, annular pistons can be moved along the spindles by pressure introduced at inlet pipes in the body until those pistons contact the heads of the spindles. The spindles are adjustable in the body to set the intermediate position of the piston and adjusting bolts set the extreme positions of the piston. For a fail-safe situation, a reservoir and control valve are introduced. As an alternative to annular pistons springs acting through top-hat shaped buffers can be used giving a fail-safe situation in the intermediate position of the piston.

    Portable stove for cooking and water heating

    公开(公告)号:GB2099574A

    公开(公告)日:1982-12-08

    申请号:GB8110643

    申请日:1981-04-06

    Abstract: A cooking and water boiling stove has an annular water chamber (3) surrounding a fire (11) contained within the stove. The stove is provided with a support (8) for cooking above the fire. The boiling water can be decanted from the stove by means of a steam pressure operated syphon (6) or, with the syphon removed, the handle (14) may be used to pour the water. A cap (7) is fitted to the tube (6) if the chamber (3) is used as a water carrier.

    FLUID-PRESSURE-OPERATED ACTUATORS

    公开(公告)号:GB2138505B

    公开(公告)日:1986-09-10

    申请号:GB8311117

    申请日:1983-04-23

    Abstract: A fluid-pressure-operated actuator is arranged to have three set positions and preferably a fail-safe characteristic in one of the three positions. In one embodiment an H-section piston moves in an actuator body and is set in its two extreme positions by fluid pressure introduced behind the web of the piston through one or other of spindles having heads and bores. To set the intermediate position, annular pistons can be moved along the spindles by pressure introduced at inlet pipes in the body until those pistons contact the heads of the spindles. The spindles are adjustable in the body to set the intermediate position of the piston and adjusting bolts set the extreme positions of the piston. For a fail-safe situation, a reservoir and control valve are introduced. As an alternative to annular pistons springs acting through top-hat shaped buffers can be used giving a fail-safe situation in the intermediate position of the piston.

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