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.

An electric heating device for emitting a heated air flow, in particular for a sanitary room or washroom in a rail-borne vehicle, includes an air duct, a fan generating the air flow, a heating element heating the air flow and a first over-temperature switch. The first over-temperature switch can reversibly switch off the heating element when a first over-temperature is exceeded. A second over-temperature switch can irreversibly switch off the heating element when a second over-temperature is exceeded. The second over-temperature switch is disposed in a recess, depression or opening formed in the air duct. The second over-temperature switch has a disconnect or isolating switch to be thermally triggered for switching off the heating element. The thermally triggered disconnect or isolating switch can be triggered by a glass sphere or bead that breaks when the second over-temperature is exceeded.

A device comprising a gate pad, a source pad and a passive actuator arranged to form a reversible mechanical and electrical connection between the gate pad and the source pad only if the temperature in the passive actuator exceeds a threshold value.

Disclosed is a flash double-temperature linkage temperature controller, comprising a mounting plate (1), and a mounting column (2) provided on the mounting plate, wherein a temperature-sensing bimetal sheet (3), a ceramic ring I (4), a static contact sheet set I (5), a ceramic ring II (6), a movable contact sheet set I (7), a ceramic ring III (8), a static contact sheet set II (9), a ceramic ring IV (10), a movable contact sheet set II (11), and a ceramic ring V (12) are sequentially mounted to the mounting column from top to bottom, and a linkage rod (15) is provided between the movable contact sheet set I and the movable contact sheet set II. According to this technical solution, the traditional single circuit is changed into two circuits; the two movable contact sheet sets and the two static contact sheet sets are connected via the linkage rod and a ceramic column II; contacts of the two movable contact sheet sets and the two static contact sheet sets sequentially operate at different temperatures due to the design of the height of the ceramic column II; 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 hear preservation heating is achieved, and the working frequency of the high-power contact sets is greatly reduced.

An electrical mains plug having a body formed of an electrically insulating material is described. Two contact pins are arranged parallel to one another and which project out of the body at a first side thereof, and inside the body are connected or can be connected in each case to an electrical conductor which leads out or can be led out of the body at a second side thereof. The thermal bimetallic element is provided as a temperature sensor, said thermal bimetallic element being a constituent part of the thermal bimetallic switch which is associated with at least one of two contact pins. An electrical connection cable suitable therefor and an electrical device connected thereto are also described.

A device comprising a gate pad, a source pad and a passive actuator arranged to form a reversible mechanical and electrical connection between the gate pad and the source pad only if the temperature in the passive actuator exceeds a threshold value.

An electrical mains plug having a body formed of an electrically insulating material is described. Two contact pins are arranged parallel to one another and which project out of the body at a first side thereof, and inside the body are connected or can be connected in each case to an electrical conductor which leads out or can be led out of the body at a second side thereof. The thermal bimetallic element is provided as a temperature sensor, said thermal bimetallic element being a constituent part of the thermal bimetallic switch which is associated with at least one of two contact pins. An electrical connection cable suitable therefor and an electrical device connected thereto are also described.

The invention relates to a forest fire early detection system with a terminal, wherein the terminal has a sensor unit, wherein the sensor unit has a first and a second bimetallic signal transmitter, wherein the two bimetallic signal transmitters are designed differently from one another. The invention further relates to a method for detecting forest fires with the method steps of detecting the amount of heat energy from a first bimetallic signal transmitter of a forest fire early detection system, converting the amount of heat energy into a deformation of the bimetal of the first bimetallic signal transmitter, generating a first signal through the deformation of the bimetal of the first bimetallic signal transmitter.