Gas discharge tube having glass seal. In some embodiments, a gas discharge tube can include an insulator layer having first and second sides and defining an opening, and first and second electrodes that cover the opening on the first and second sides of the insulator layer, respectively. The gas discharge tube can further include a first glass layer implemented between the first electrode and the first side of the insulator layer, and a second glass layer implemented between the second electrode and the second side of the insulator layer, such that the first and second glass layers provide a seal for a chamber defined by the opening and the first and second electrodes.

Methods for fabricating gas discharge tubes. In some embodiments, a method for fabricating a gas discharge tube (GDT) device can include providing or forming an insulator substrate having first and second sides and defining an opening. The method can further include providing or forming a first electrode and a second electrode. The method can further include forming a first glass seal between the first electrode and the first side of the insulator substrate, and a second glass seal between the second electrode and the second side of the insulator substrate, such that the first and second glass seals provide a hermetic seal for a chamber defined by the opening and the first and second electrodes.

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.

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.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below the lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter can be forward-assembled.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below the lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter can be forward-assembled.

Glass sealed gas discharge tubes. In some embodiments, a gas discharge tube (GDT) can include an insulator substrate having first and second sides and defining an opening. The GDT can further include a first electrode implemented to cover the opening on the first side of the insulator substrate, and a second electrode implemented to cover the opening on the second side of the insulator substrate. The GDT can further include a first glass seal implemented between the first electrode and the first side of the insulator substrate, and a second glass seal implemented between the second electrode and the second side of the insulator substrate, such that the first and second glass seals provide a hermetic seal for a chamber defined by the opening and the first and second electrodes.

An arrester comprising a plurality of layers arranged one above another and comprising a cavity is specified, wherein the cavity extends through at least two of the layers and wherein electrodes adjoining the cavity are arranged between said two layers. Furthermore, a method for manufacturing an arrester is specified.

An arrester comprising a plurality of layers arranged one above another and comprising a cavity is specified, wherein the cavity extends through at least two of the layers and wherein electrodes adjoining the cavity are arranged between said two layers. Furthermore, a method for manufacturing an arrester is specified.

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.