US Patent No. 10,512,122

ELECTRICAL CARTRIDGE TYPE HEATER WITH TEMPERATURE MONITORING AND ELECTRICAL HEATER WITH TEMPERATURE MONITORING


Patent No. 10,512,122
Issue Date December 17, 2019
Title Electrical Cartridge Type Heater With Temperature Monitoring And Electrical Heater With Temperature Monitoring
Inventorship Andreas Schlipf, Tuttlingen (DE)
Assignee

Claim of US Patent No. 10,512,122

1. An electrical cartridge heater comprising:an outer jacket with an interior space;
an electrical heating element arranged in said interior space of said outer jacket, said heating element being formed in a cylindrical shape, said electrical heating element being arranged in a meandering pattern with said meandering pattern being arranged on a circumferential surface of said cylindrical shape;
a temperature monitoring device arranged in said interior space of said outer jacket, said temperature monitoring device comprising a wire or tube arranged in a meandering pattern, said temperature monitoring device in said meandering pattern being formed in a cylindrical shape with said meandering pattern being arranged on a circumferential surface of said cylindrical shape, said cylindrical shape of said temperature monitoring device being arranged coaxial with said cylindrical shape of said electrical heating element, said cylindrical shape of said temperature monitoring device being arranged radially inside said cylindrical shape of said electrical heating element, said wire or tube being made of a material that has an electrical resistance that increases with increased temperature, with a positive temperature coefficient, or that has an electrical resistance that decreases with increased temperature, with a negative temperature coefficient, an absolute value of the temperature coefficient of the electrical resistance being greater than 800 ppm/K, between 20° C. and 105° C.;
an electrically non-conducting filler arranged between each of said outer jacket, said electrical heating element and said temperature monitoring device.