US 5,176,451 A · Temperature sensor

Abstract

A temperature sensor for use in a heating apparatus is disclosed. The temperature sensor includes a rigid cylindrical body and upper and lower plates disposed at one end of the rigid cylindrical body. A first electrical insulator is interposed between the upper and lower plates and has a recess filled with a second electrical insulator, in which a hot junction of a thermocouple is buried. Since the respective components are just in contact with each other without any bonding therebetween, there arises no stress in the temperature sensor even at high temperatures. Furthermore, even if a short circuit occurs in the thermocouple, data indicating the short circuit is output from the temperature sensor to the control system of the heating apparatus, thereby assuring safety in the operation of the heating apparatus.

Claims7

Dependent claims

A temperature sensor comprising:

a cylindrical rigid body;
a first plate and second plate both mounted on one end of the cylindrical rigid body, the second plate positioned below and spaced apart from the first plate;
a first electrical insulator interposed between the first and second plates and having a recess located toward the first plate, the first electrical insulator not being bonded to either the first or second plates;
a second electrical insulator which fills the recess of the first electrical insulator and is not bonded to the first plate;
and
a thermal element electrically insulated from the cylindrical rigid body and the first and second plates, part of the thermal element being buried in the second electrical insulator.

3 more elements

Dependencies are inferred from the claim text.

Temperature sensor

Life of this patent

Temperature sensor

Life of this patent

Abstract

Claims7