There is provided a pipe heating device, including; a sensor installed in a gas pipe; a heating part having a heat generation portion arranged so as to cover the gas pipe except for a region of the gas pipe where the sensor is installed; and a heat conducting member attached between an outer peripheral surface of the gas pipe and the sensor and formed of a material having a higher thermal conductivity than the gas pipe.

There is provided a pipe heating device, including; a sensor installed in a gas pipe; a heating part having a heat generation portion arranged so as to cover the gas pipe except for a region of the gas pipe where the sensor is installed; and a heat conducting member attached between an outer peripheral surface of the gas pipe and the sensor and formed of a material having a higher thermal conductivity than the gas pipe.

A flash double-temperature linkage temperature controller has an arrangement that enables contacts of two movable contact sheet sets and two static contact sheet sets to sequentially operate at different temperatures, and a desired fixed temperature difference is obtained. The two movable contact sheet sets are respectively connected to the two static contact sheet sets to control two electric heating tubes, so that the effect whereby two electric heating tubes (high power) work during water heating and a single electric heating tube (low power) works during heat preservation heating is achieved, and the working frequency of the high-power contact sets is greatly reduced.

A thermal switch includes a thermally responsive plate assembly including a metal support deforming from an initial shape before a header plate assembly is secured to a housing assembly, with a result that a position of a movable contact in the housing assembly is adjusted so as to be within a predetermined height range relative to an open end of a housing. A contact pressure of switching contacts after the assembling is produced by the height adjustment, and subsequently, a neighborhood of a part of the housing to which part the thermally responsive plate assembly is secured is deformed, so that an operating temperature is calibratable.

A thermal switch includes a thermally responsive plate assembly including a metal support deforming from an initial shape before a header plate assembly is secured to a housing assembly, with a result that a position of a movable contact in the housing assembly is adjusted so as to be within a predetermined height range relative to an open end of a housing. A contact pressure of switching contacts after the assembling is produced by the height adjustment, and subsequently, a neighborhood of a part of the housing to which part the thermally responsive plate assembly is secured is deformed, so that an operating temperature is calibratable.

A temperature switch includes a base having a receiving hole, and a conducting mechanism mounted on the base and having first and second conductive modules, a connection module connected electrically and releasably to the first and second conductive modules, and two deformable rods that are disposed in the receiving hole and that push the second conductive module to abut against the connection module. The second conductive module is moved away from the connection module when one of the deformable rods is deformed by temperature to switch the temperature switch from an energized position to a safety cut-off position.

A device is described wherein an actuator (3, 4; 103, 104) drives a member, such as a rack (6) meshed with a pinion (5), between two stable positions. For this purpose, elements for stopping the movable member are provided, which cooperate with elements present on the outer housing (2, 21), in which the actuator and the movable member (5, 51) are arranged, for holding at least one of said stable conditions. The device of the invention ensures low energy consumption because the actuator (3) only operates for moving the movable member from one stable position to the other.

A device is described wherein an actuator (3, 4; 103, 104) drives a member, such as a rack (6) meshed with a pinion (5), between two stable positions. For this purpose, elements for stopping the movable member are provided, which cooperate with elements present on the outer housing (2, 21), in which the actuator and the movable member (5, 51) are arranged, for holding at least one of said stable conditions. The device of the invention ensures low energy consumption because the actuator (3) only operates for moving the movable member from one stable position to the other.

An infinite switch includes a front cover, a back cover, and a base secured between the front cover and the back cover. A floating shaft extending through the front cover and the base. A cam fixed to the base and slidingly receiving an end of the floating shaft. The floating shaft is moveable in an axial direction extending parallel to a longitudinal axis of the floating shaft and the cam is fixed to prevent movement in the axial direction.

An infinite switch includes a front cover, a back cover, and a base secured between the front cover and the back cover. A floating shaft extending through the front cover and the base. A cam fixed to the base and slidingly receiving an end of the floating shaft. The floating shaft is moveable in an axial direction extending parallel to a longitudinal axis of the floating shaft and the cam is fixed to prevent movement in the axial direction.