Abstract: A thermal actuator includes a thermal detector, an actuator unit and a connecting circuit for electrically connecting the thermal detector in parallel with the actuator unit. The thermal detector includes a first contact member and a second contact member normally remained in contact with the first contact member. However, the second contact member will bend to uncontact with the first contact member when an overheated or over-cold temperature occurred around the thermal detector, so that the current normally flowing through the thermal detector will flow to the actuator unit too. Therefore, a heat wire wrapped around an actuating piece of the actuator unit generates heat to increase the temperature around the actuating piece. When the temperature around the actuating piece increases to a predetermined extent, the actuating piece bends so as to provide an actuating action.

Abstract: A circuit breaker assembly, which is responsive to both current overload and thermal overheat or over-cold, includes a circuit breaker switch containing a current release device arranged in a housing to be responsive to a current overload and operative to permit a respective contact spring to move a corresponding movable contact away from a fixed contact upon the occurrence of a current overload and independently of the position of a switching rocker; and a thermal release actuator received in the housing for can automatically providing an actuating action to operate another respective contact spring to move another corresponding movable contact away from another fixed contact when a temperature of a predetermined surrounding zone is overheated or over-cold.

Abstract: A thermal actuator includes a thermal detector, an actuator unit and a connecting circuit for electrically connecting the thermal detector and the actuator unit. When a second contact member is normally remained uncontact with a first contact member of the thermal detector, the thermal actuator is an open circuit and not function. However, when the second contact member bends to contact with the first contact member due to an overheated or over-cold temperature around the thermal detector, the thermal actuator is in a close circuit and the electric current flows to an actuator unit thereof. A heat wire wrapped around an actuating piece of the actuator unit generates heat to increase the temperature around the actuating piece. When the temperature around the actuating piece increases to a predetermined extent, the actuating piece bends so as to provide an actuating action.

Abstract: An overload protective circuit breaker switch including: a first fixed contact and a second fixed contact adapted to connect an electric appliance to power supply; a movable contact adapted to form with the first fixed contact and the second fixed contact a normal open contact; an actuator controlled by the user to turn about an axis; a lever coupled to and turned with the actuator, the lever being turned about a first bearing point, when the overload protective circuit breaker switch is not at an overload status, to move the movable contact between a normal open contact position in which the movable contact form with the first fixed contact and the second fixed contact a normal open contact, and a normal close contact position in which the movable contact form with the first fixed contact and the second fixed contact a normal close contact; and a release mechanism adapted to move the lever, the release mechanism releasing the lever from the first bearing point to a second bearing point upon an overload, caus