| 摘要 |
Refrigeration systems of the type including first and second communicating, sealed, cylindrical, vessels having respective first and second piston-like elements reciprocating axially therein are characterized by having the vessels positioned in a line along a single axis and having a rod or shaft extending along the axis through a sliding seal for connecting the piston-like elements. A coupling for connecting the rod with one of the piston-like elements allows "lost" axial motion of the rod, without a corresponding motion of the attached piston, over a first portion of the range of axial travel of the rod in both directions. An intercommunicating line is also included for intercommunicating appropriate ends of the elongated vessels.
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