The present invention relates to a PT heater and, more specifically, to a PTC heater which: mechanically fixes a heating element, a terminal, an insulating layer, and a heat-radiating unit, which constitute the PTC heater, by bending a fixing projection of a hook structure formed at a heat rod; and further has an auxiliary fixing protrusion capable of fixing the position of the heating element so as to increase the adhesiveness between the PTC element and the heat-radiating unit, thereby enabling performance to improve and facilitating assembly through the heat rod.

A temperature sensor includes: a thermistor; a pair of lead-out wires each having a front end connected to the thermistor; a glass body for sealing the thermistor and the front ends of the lead-out wires; a pair of leadwires each having a front end connected to the rear end of each of the pair of lead-out wires; and a synthetic resin covering layer for covering the glass body, the pair of lead-out wires excepting the front end portions, and the front end portions of the pair of lead wires. The covering layer shaped as a tube is arranged by: elastically expanding a laminate of a tubular inner layer and a tubular outer layer so as to be fitted forcibly onto the glass body, the pair of lead-out wires excepting the front end portions, and the front end portions of the pair of lead wires; and applying heat to melt the inner layer and to shrink the outer layer. The peripheral surface of the glass body is brought into a direct contact with the outer layer without the inner layer interposed.

A temperature sensor includes: a thermistor; a pair of lead-out wires each having a front end connected to the thermistor; a glass body for sealing the thermistor and the front ends of the lead-out wires; a pair of leadwires each having a front end connected to the rear end of each of the pair of lead-out wires; and a synthetic resin covering layer for covering the glass body, the pair of lead-out wires excepting the front end portions, and the front end portions of the pair of lead wires. The covering layer shaped as a tube is arranged by: elastically expanding a laminate of a tubular inner layer and a tubular outer layer so as to be fitted forcibly onto the glass body, the pair of lead-out wires excepting the front end portions, and the front end portions of the pair of lead wires; and applying heat to melt the inner layer and to shrink the outer layer. The peripheral surface of the glass body is brought into a direct contact with the outer layer without the inner layer interposed.

A power resistor is disclosed, having at least one electrical connection, having a carrier substrate, which has at least one resistor element composed of a thick-film material and at least one contact electrode to which the resistor element electrically connects, having at least one electrical conductor, which is soldered to the contact electrode and produces an electrical connection between the contact electrode and the electrical terminal, and having a housing, which is at least partially filled with at least one casting compound and in which the resistor element and contact electrode are encapsulated, with the electrical conductor protruding out through the casting compound. In order to achieve a simply designed and easy-to-use power resistor, it is proposed for a pin, in particular a soldering pin or press-fitting pin, to constitute the electrical conductor, which pin is placed onto the contact electrode and soldered to it and constitutes the electrical terminal of the power resistor.

A power resistor is disclosed, having at least one electrical connection, having a carrier substrate, which has at least one resistor element composed of a thick-film material and at least one contact electrode to which the resistor element electrically connects, having at least one electrical conductor, which is soldered to the contact electrode and produces an electrical connection between the contact electrode and the electrical terminal, and having a housing, which is at least partially filled with at least one casting compound and in which the resistor element and contact electrode are encapsulated, with the electrical conductor protruding out through the casting compound. In order to achieve a simply designed and easy-to-use power resistor, it is proposed for a pin, in particular a soldering pin or press-fitting pin, to constitute the electrical conductor, which pin is placed onto the contact electrode and soldered to it and constitutes the electrical terminal of the power resistor.

A method for manufacturing a surge absorbing device is provided. The method includes providing an elongate ceramic tube having a hollow space defined therein and having open and opposite first and second end; forming a first plating layer and a second plating layer on the first end and the second end, respectively; placing a surge absorbing element within the hollow space within the ceramic tube; disposing first and second brazing rings on the first plating layer and the second plating layer, respectively; disposing first and second sealing electrodes on the first and second brazing rings respectively; and melting the first and second brazing rings in an inert gas atmosphere to attach the first and second sealing electrodes onto the first plating layer and the second plating layer, respectively.

An ignition resistor comprises a substrate, two antistatic layers, an ignition structure and a protective layer. The ignition structure is attached to the upper surface of the substrate through an adhesive layer, wherein the ignition structure includes two electrode portions and an ignition portion, the two electrode portions are respectively connected to two opposite ends of the ignition portion. The two antistatic layers are respectively disposed on the opposite sides of the ignition portion and the upper surface of the substrate between the two electrode portions, and the protective layer covers the ignition portion.

An ignition resistor comprises a substrate, two antistatic layers, an ignition structure and a protective layer. The ignition structure is attached to the upper surface of the substrate through an adhesive layer, wherein the ignition structure includes two electrode portions and an ignition portion, the two electrode portions are respectively connected to two opposite ends of the ignition portion. The two antistatic layers are respectively disposed on the opposite sides of the ignition portion and the upper surface of the substrate between the two electrode portions, and the protective layer covers the ignition portion.

A lead insertion system adapted to insert a lead into a glass tube includes a first robot on which a first gripper is mounted and a second robot on which a second gripper is mounted. The first gripper grips the glass tube and the second gripper grips the lead. The lead insertion system includes a flame heater heating the glass tube gripped by the first robot and the lead gripped by the second robot with a flame. The second robot inserts the lead into the glass tube held by the first robot with the lead heated by the flame and the glass tube heated and softened by the flame.

A method for manufacturing a surge absorbing device is provided. The method includes providing an elongate ceramic tube having a hollow space defined therein and having open and opposite first and second end; forming a first plating layer and a second plating layer on the first end and the second end, respectively; placing a surge absorbing element within the hollow space within the ceramic tube; disposing first and second brazing rings on the first plating layer and the second plating layer, respectively; disposing first and second sealing electrodes on the first and second brazing rings respectively; and melting the first and second brazing rings in an inert gas atmosphere to attach the first and second sealing electrodes onto the first plating layer and the second plating layer, respectively.