In-Situ overheat alarm for a device

Means for placement in a heat conducting contact with a machine (42, 50), said means serving an overheat condition in the machine (42, 50) to detect and notify when the machine (42, 50) is operated or operated was ; the device comprising: a molded body (20, 54, 54 ', 70, 170) of an active material, which is composed such that it undergoes a form, stiffness or volume change when it is heated to a predetermined temperature, the overheat state in a machine (42, 50) indicating when the device in a heat conducting contact with the machine (42, 50) is arranged, wherein the molded body (20, 54, 54 ', 70, 170) of active material in the device for a heat transfer from the engine (42, 50) is disposed; a surface (44, 71) for a contact surface-to-surface with a surface of the machine (42, 50) and a Flagelement (10, 10, 58, 88, 90) having a surface area (12, 62, 108, 108 ' ) for showing a visual indication of overheating in the machine (42, 50), wherein the Flagelement (10, 10 ', 58, 88, 90) is held in a stowed position in the device, when the machine (42, 50 ) is not in an overtemperature condition, wherein the Flagelement (10, 10 ', 58, 88, 90) imaging by an actuation of the active material into an alarm position is movable, when the active material through the heat contact with the machine (42, 50 ) is heated to its predetermined temperature and undergoes its shape, stiffness or volume change; a spring (24, 32, 32 ', 59, 82, 82') extending to the Flagelement (10, 10 ', 58, 88, 90) is in contact with and serves the Flagelement (10, 10', 58, 88, 90) imparting upon actuation of the heated active material into its alarm position to move; and a locking mechanism (16, 18, 48, 86, 92, 94, 94 ') for holding the Flagelements (10, 10', 58, 88, 90) in its stowed position against the force of the spring (24, 32, 32 ' , 59, 82, 82 '), to the active material is heated to its predetermined temperature and due to its shape, stiffness or volume change of the locking mechanism (16, 18, 48, 86, 92, 94, 94') releases to to thereby allow the spring (24, 32, 32 ', 59, 82, 82') the Flagelement (10, 10 ', 58, 88, 90) moves in imparting its alarm position.