Refrigeration – Using electrical or magnetic effect
Reexamination Certificate
2005-11-01
2005-11-01
Doerrler, William C. (Department: 3744)
Refrigeration
Using electrical or magnetic effect
C062S051100, C165S275000
Reexamination Certificate
active
06959554
ABSTRACT:
A passive gas-gap heat switch for use with a multi-stage continuous adiabatic demagnetization refrigerator (ADR). The passive gas-gap heat switch turns on automatically when the temperature of either side of the switch rises above a threshold value and turns off when the temperature on either side of the switch falls below this threshold value. One of the heat switches in this multistage process must be conductive in the 0.25° K to 0.3° K range. All of the heat switches must be capable of switching off in a short period of time (1-2 minutes), and when off to have a very low thermal conductance. This arrangement allows cyclic cooling cycles to be used without the need for separate heat switch controls.
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Di Pirro Michael J.
Shirron Peter J.
Cox Diana M.
Doerrler William C.
The United States of America as represented by the Administrator
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