Device for measuring the temperature inside a nuclear reactor

Claim 1

A DEVICE FOR MEASURING THE TEMPERATURE WITHIN A NUCLEAR REACTOR COMPRISING A CARTRIDGE MEMBER ADAPTED TO BE INSERTED IN A FUEL CHANNEL OF A REACTOR, SAID CARTRIDGE MEMBER BEING PROVIDED WITH A FIRST CHANNEL EXTENDING LONGITUDINALLY OF SAID CARTRIDGE MEMBER AND BEING OPEN AT ONE END THEREOF, A TRANSVERSE CHANNEL PROVIDED THROUGH A WALL OF SAID CARTRIDGE MEMBER AND EXTENDING INTO SAID FIRST CHANNEL, ROD-LIKE MEANS SLIDABLE WITHIN SAID FIRST CHANNEL, SPRING MEANS TO NORMALLY URGE A PORTION OF SAID ROD-LIKE MEANS OUT THROUGH THE OPEN END OF SAID FIRST CHANNEL, ELECTRICAL CONTACT MEANS EXTENDING AT LEAST PARTIALLY WITHIN SAID TRANSVERSE CHANNEL AND CONNECTED TO A PORTION OF SAID ROD-LIKE MEANS, AND SPRING MEANS ACTING UPON SAID LAST-MENTIONED PORTION OF SAID ROD-LIKE MEANS TO TEND TO RETAIN SAID ELECTRICAL CONTACT MEANS SUBSTANTIALLY WITHIN SAID TRANSVERSE CHANNEL DURING INSERTION OF SAID DEVICE INTO A FUEL CHANNEL.