Abstract: An apparatus and method is disclosed for regulating flow of working fluid through parallel condensation tubes requiring subcooling. The apparatus provides an elongated restriction element extending into the outlet of the respective condensation tubes to the approximate point of onset of subcooling. The elongated restriction element is braced externally to the condensation tube with a support that is used for positioning and maintaining the elongated restriction element in the correct position. The elongated restriction element has a pentagonal cross-section and is slightly undersize with respect to the working fluid passageways through the condensation tubes. The restriction member significantly restricts flow of partially vaporized working fluid but does not significantly affect the flow of fully liquid working fluid.

Abstract: A magnetic attachment mechanism adapted for interfacing with the manipulator arm (11) of a remote manipulator system and comprising a pair of permanent magnets (31,32) of rare earth material which are arranged in a stator-rotor relationship. The rotor magnet (32), is journalled for rotation about its longitudinal axis between pole plates (35,36) of the stator magnet (31), each of which includes an adhering surface (35a,36a). In a first rotary position corresponding to the "ON" condition, each of the poles of the rotor magnet (32) is closely adjacent a stator magnet pole plate of like polarity whereby the respective magnet fields are additive for producing a strong magnetic field emanating from the adhering surfaces (35a,36a) for attracting a ferrous magnetic plate 20, or the like, affixed to the payload (20 or 50).

Abstract: Apparatus and method of capturing an orbiting spacecraft by attaching a grapple fixture. A probe is inserted into an opening, such as a rocket nozzle, in the spacecraft until a stop on the probe mechanism contacts the spacecraft, a lever is actuated releasing a spring loaded rod which moves axially along the probe removing a covering sleeve to expose spring loaded toggle fingers which pivot open engaging the side of the opening. The probe is shortened and tensioned by turning a screw thread, pressing the fingers inside of the opening to compress the spacecraft between the toggle fingers and the stop. A grapple fixture attached to the probe, which is thus secured to the spacecraft, is engaged by appropriate retrieval means such as a remote manipulator arm.