Maximum temperature detector and recorder, for closed chamber e.g. for transporting nuclear fuel rods, has series of fusible wires of different metals

摘要

The temperature detector and recorder consists of a series of fusible wires (13) made from metals with different melting points, located between lengthwise elements (12) like the rungs (14) of a ladder (11) inside a quartz capsule (10) filled with a heat-conducting gas - helium. The fusible wires are made e.g. from alloys of lead, tin and silver, and their behavior can be monitored by laser beam.