# US 6,007,327 A · Combined temperature limiter and igniter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,007,327 A - Document ID: US6007327A - Status: Granted - Kind: A - Application number: 08/902,296 - Filed: 1997-07-29 - Granted: 1999-12-28 - Earliest claimed: 1996-07-30 - Assignees: Electrovac, Fabrikation elektrotechnischer Spezial-artikel Gesellschaft m.b.H. - Inventors: Hans-Peter Morbitzer - Web page: https://patentgrep.com/patent/US6007327A ## CPC - H01H 37/48: with extensible rigid rods or tubes - F24C 3/103: {of electric ignition devices} - G05D 23/27541: {using expansible solid} - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ## Abstract Apparatus for controlling the temperature of a cooking location of a cooking unit includes a temperature sensor having an outer tube and an inner rod received within the tube and having a different coefficient of expansion, a switch base operatively connected to the temperature sensor and carrying electric contacts actuated by the temperature sensor, and an igniter connected to the temperature sensor and/or switch base. ## Claims ### Claim 1 Apparatus for controlling the temperature of a gas-heated cooking location of a cooking unit; comprising: a temperature sensor including an outer tube and an inner rod received within the tube, said tube and said rod having different coefficients of thermal expansion; a switch base operatively connected to the temperature sensor and carrying electric contacts actuated by the temperature sensor; and an igniter connected to one of the elements selected from the group consisting of temperature sensor and switch base, said igniter circumscribing the temperature sensor. ### Claim 2 (depends on 1) The apparatus of claim 1 wherein the igniter concentrically circumscribes the temperature sensor. ### Claim 3 (depends on 1) The apparatus of claim 1 wherein the igniter is formed by an electric thermal resistor. ### Claim 4 (depends on 3) The apparatus of claim 3, and further comprising a support body, said electric thermal resistor being mounted on the support body. ### Claim 5 (depends on 3) The apparatus of claim 3 wherein the electric thermal resistor is provided in the form of a spiral. ### Claim 6 (depends on 5) The apparatus of claim 5 wherein the electric thermal resistor is provided in the form of a double-threaded spiral. ### Claim 7 (depends on 4) The apparatus of claim 4 wherein the support body extends substantially along a longitudinal axis of the thermal resistor. ### Claim 8 (depends on 4) The apparatus of claim 4 wherein the support body exhibits a tubular configuration, with the rod of the temperature sensor extending through the support body. ### Claim 9 (depends on 8) The apparatus of claim 8 wherein the support body is arranged between the switch base and the tube of the temperature sensor. ### Claim 10 (depends on 1) The apparatus of claim 1 wherein the igniter is formed by at least two electrodes in spaced-apart disposition and electrically connectable to a high-voltage source. ### Claim 11 (depends on 10) The apparatus of claim 10 wherein the electrodes have ends spaced from one another by a gas-filled gap within a heating chamber of a cooking location. ### Claim 12 (depends on 11) The apparatus of claim 11 wherein the electrodes are of hollow cylindrical configuration and are so disposed as to form an inner electrode and an outer electrode which extend in longitudinal direction of the temperature sensor, with a first cylindrical insulator being positioned between the electrodes and with a second cylindrical insulator being positioned within the inner electrode. ### Claim 13 (depends on 12) The apparatus of claim 12 wherein the second insulator has an interior space for at least partially receiving the rod and defines one end supporting the tube. ### Claim 14 (depends on 12) The apparatus of claim 12 wherein the outer electrode is formed with circumferentially spaced projections. ### Claim 15 Apparatus for controlling the temperature of a cooking location of a cooking unit; comprising: a temperature sensor including an outer tube and an inner rod received within the tube, said tube and said rod having different coefficients of thermal expansion; a switch base operatively connected to the temperature sensor and carrying electric contacts actuated by the temperature sensor; and an igniter in the form of an electric thermal resistor circumscribing the temperature sensor and connected to one of the elements selected from the group consisting of temperature sensor and switch base. ### Claim 16 (depends on 15) The apparatus of claim 15 wherein the electric thermal resistor concentrically circumscribes the temperature sensor. ### Claim 17 Apparatus for controlling the temperature of a cooking location of a cooking unit; comprising: a temperature sensor including an outer tube and an inner rod received within the tube, said tube and said rod having different coefficients of thermal expansion; a switch base operatively connected to the temperature sensor and carrying electric contacts actuated by the temperature sensor; and an igniter in the form of at least two electrodes in spaced-apart disposition and circumscribing the temperature sensor, said electrodes being electrically connectable to a high-voltage source. ### Claim 18 (depends on 17) The apparatus of claim 17 wherein the electrodes concentrically circumscribe the temperature sensor.