A spark plug is provided which includes a hollow cylindrical center electrode disposed inside a metal shell and a ground electrode joined to the metal shell. The ground electrode has an inner peripheral surface facing an outer peripheral surface of the center electrode. At least one of the outer periphery of the center electrode and the inner periphery of the ground electrode has formed therein at least one recess whose ends lies in a center-to-ground electrode facing region where the outer peripheral surface of the center electrode faces the inner peripheral surface of the ground electrode in a radial direction of the center electrode. This decreases voltage required by the spark plug to achieve discharge.

A gas arrester is disclosed. In an embodiment a gas arrester for data line systems includes a discharge electrode, a plurality of individual electrodes for connection to data lines and a common gas discharge region formed between the individual electrodes and the discharge electrode.

Flash tubes for photographic use, in particular, a flash tube is adapted to provide a light output adapted to FP-sync, Flat Peak. The flash tube includes a length of glass tubing enclosing a gas for use in the flash tube, a cathode inside a first end part of glass tubing and an anode inside a second end part of glass tubing. The cathode includes an element that helps to ionize the gas that is wound around the cathode, such that a spark stream starts from the upper part of the cathode and is prevented from spreading down wards on the cathode and changing the arc length during the light output adapted to FP-sync.

Flash tubes for photographic use, in particular, a flash tube is adapted to provide a light output adapted to FP-sync, Flat Peak. The flash tube includes a length of glass tubing enclosing a gas for use in the flash tube, a cathode inside a first end part of glass tubing and an anode inside a second end part of glass tubing. The cathode includes an element that helps to ionize the gas that is wound around the cathode, such that a spark stream starts from the upper part of the cathode and is prevented from spreading down wards on the cathode and changing the arc length during the light output adapted to FP-sync.

The present invention relates to a power amplification device capable of being powered by a single input voltage and comprising a switching module comprising a first discharge electrode and a second discharge electrode. The power amplification device comprises a triggering module configured to convert the input voltage into a first supply voltage and a second supply voltage, detect an activation event, generate an activation signal from the first supply voltage when an activation event has been detected, generate a pulse command from the second supply voltage when an activation signal has been generated, and transmit the generated pulse control to the triggering means of the switching module so that it triggers the formation of an electric arc between the first discharge electrode and the second discharge electrode.

The present invention relates to a power amplification device capable of being powered by a single input voltage and comprising a switching module comprising a first discharge electrode and a second discharge electrode. The power amplification device comprises a triggering module configured to convert the input voltage into a first supply voltage and a second supply voltage, detect an activation event, generate an activation signal from the first supply voltage when an activation event has been detected, generate a pulse command from the second supply voltage when an activation signal has been generated, and transmit the generated pulse control to the triggering means of the switching module so that it triggers the formation of an electric arc between the first discharge electrode and the second discharge electrode.

An ESD protection device includes a ceramic element assembly including a glass component, first and second discharge electrodes on the same plane in the ceramic element assembly and opposed to each other with a gap therebetween, a discharge auxiliary electrode that connects the first discharge electrode to the second discharge electrode on the same plane, and a seal layer that is disposed between the discharge auxiliary electrode and the ceramic element assembly and that reduces or prevents a glass component in the ceramic element assembly from entering the discharge auxiliary electrode. The seal layer includes a conductive component.

An ESD protection device includes a ceramic element assembly including a glass component, first and second discharge electrodes on the same plane in the ceramic element assembly and opposed to each other with a gap therebetween, a discharge auxiliary electrode that connects the first discharge electrode to the second discharge electrode on the same plane, and a seal layer that is disposed between the discharge auxiliary electrode and the ceramic element assembly and that reduces or prevents a glass component in the ceramic element assembly from entering the discharge auxiliary electrode. The seal layer includes a conductive component.

A protection contactor includes a contact part coming into contact with a conductor of an electric device and having elasticity and an ESD protection part connected to a portion of the contact part to extend to a circuit board disposed to be spaced apart from the contact part and comprising a conductive material. Thus, in accordance with the exemplary embodiments, current due to an overvoltage or an ESD voltage of a discharge starting voltage concentratedly flows through the protrusion to improve bypassing efficiency to a ground part. Thus, the current due to the overvoltage or the ESD voltage that is above the discharge starting voltage may be effectively bypassed to prevent an internal circuit from being damaged by static electricity.

A surge protective device of the present invention includes an insulating tube, a pair of sealing electrodes for closing openings on both ends of the insulating tube so as to seal a discharge control gas inside the tube, wherein the pair of sealing electrodes has a pair of convex electrode portions projecting inwardly so as to face to each other, and at least one groove part extending in a circumferential direction is formed on the inner circumferential surface of the insulating tube.