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Title: Electro-mechanical heat switch for cryogenic applications

Abstract

A heat switch includes two symmetric jaws. Each jaw is comprised of a link connected at a translatable joint to a flexible arm. Each arm rotates about a fixed pivot, and has an articulated end including a thermal contact pad connected to a heat sink. The links are joined together at a translatable main joint. To close the heat switch, a closing solenoid is actuated and forces the main joint to an over-center position. This movement rotates the arms about their pivots, respectively, forces each of them into a stressed configuration, and forces the thermal contact pads towards each other and into compressive contact with a cold finger. The closing solenoid is then deactivated. The heat switch remains closed due to a restoring force generated by the stressed configuration of each arm, until actuation of an opening solenoid returns the main joint to its starting open-switch position.

Inventors:
 [1];  [2];  [3]
  1. (Oakland, CA)
  2. (Hayward, CA)
  3. (Berkeley, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
875103
Patent Number(s):
6532759
Assignee:
The Regents of the University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electro-mechanical; heat; switch; cryogenic; applications; symmetric; jaws; jaw; comprised; link; connected; translatable; joint; flexible; arm; rotates; fixed; pivot; articulated; including; thermal; contact; pad; sink; links; joined; main; close; closing; solenoid; actuated; forces; over-center; position; movement; arms; pivots; stressed; configuration; pads; towards; compressive; cold; finger; deactivated; remains; closed; due; restoring; force; generated; actuation; returns; starting; open-switch; heat sink; cold finger; /62/165/

Citation Formats

van den Berg, Marcel L., Batteux, Jan D., and Labov, Simon E. Electro-mechanical heat switch for cryogenic applications. United States: N. p., 2003. Web.
van den Berg, Marcel L., Batteux, Jan D., & Labov, Simon E. Electro-mechanical heat switch for cryogenic applications. United States.
van den Berg, Marcel L., Batteux, Jan D., and Labov, Simon E. Wed . "Electro-mechanical heat switch for cryogenic applications". United States. https://www.osti.gov/servlets/purl/875103.
@article{osti_875103,
title = {Electro-mechanical heat switch for cryogenic applications},
author = {van den Berg, Marcel L. and Batteux, Jan D. and Labov, Simon E.},
abstractNote = {A heat switch includes two symmetric jaws. Each jaw is comprised of a link connected at a translatable joint to a flexible arm. Each arm rotates about a fixed pivot, and has an articulated end including a thermal contact pad connected to a heat sink. The links are joined together at a translatable main joint. To close the heat switch, a closing solenoid is actuated and forces the main joint to an over-center position. This movement rotates the arms about their pivots, respectively, forces each of them into a stressed configuration, and forces the thermal contact pads towards each other and into compressive contact with a cold finger. The closing solenoid is then deactivated. The heat switch remains closed due to a restoring force generated by the stressed configuration of each arm, until actuation of an opening solenoid returns the main joint to its starting open-switch position.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

Patent:

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