Patent ID: 7882620

Claim:
A shield assembly for protecting a thermocouple, the assembly comprising: a first tube having an upper portion and a lower portion, the lower portion including a lower end, the first tube including a first elongated cavity closed at the lower end and receiving the thermocouple; a second tube having a second elongated cavity with at least one open end, the second elongated cavity receiving the upper portion of the first tube while a part of the lower portion of the first tube containing the thermocouple extends out of the open end; and an open gap between adjacent walls of the second elongated cavity and of the first tube, the gap being such as to allow independent thermal deformations of the first and second tubes; whereby the lower end and at least a portion of the part of the lower portion of the first tube are adapted to be in a first medium having a first temperature while the second tube is adapted to be in a second medium having a second temperature, the first and second temperatures being different.