Abstract: A gas discharge lamp having an accurate centering of electrodes. The gas discharge lamp has a gas-filled glass tube whereby the electrodes are inserted at end faces of the glass tube. Each electrode is melted into respectively a hollow-cylinder-type glass member residing inside an end of the glass tube. The outside end face of each glass member lies approximately flush with the corresponding end face of the glass tube and is coated, together with the end face of the glass tube, with a layer of glass solder.

Abstract: A process for producing a gas discharge lamp particularly useful as a flash tube comprising a glass tube, which contains an inert gas with a preformed sintered glass body sealed into each end and containing at least one electrical connector pin of an electrode extending therethrough in a sealed fashion, characterized by providing a glass tube, providing the sintered glass preforms for each end of the glass tube, sealing each of the glass bodies in the respective ends of the glass tube, and filling the glass tube with the desired amount of inert gas prior to completing the formation of all the seals between the glass tube and the glass bodies. The process preferably is accomplished in an apparatus having a chamber which can be evacuated and which can contain a controlled atmosphere at a desired pressure.

Abstract: A flash tube is disclosed having metallic end caps attached either in the shape of a plate or a cup upon ends of a glass or quartz tube. They are attached by adhesive, or are soldered on by soldering glass. One of the end caps internally supports a sintered body as a cathode. Soldering temperatures and a distance of the sintered body from the soldered joint when soldering glass is used are chosen such that no activating metal of the sintered body evaporates, since this reduces the work function of the electrons at the ends of the tube.

Abstract: A gas discharge lamp having a glass tube with preformed sintered glass bodies sealed to each end with each body carrying at least one connector pin for an electrode so that at least one electrode is disposed and supported adjacent each end of the discharge tube. The glass bodies may be sealed in the discharge tube either by glass solder, an organic adhesive or a combination of both.

Abstract: A circuit arrangement for igniting a gas discharge flush tube in which the flash tube is arranged in the circuit of a voltage source in parallel to a flash capacitor and the flash tube is connected to an ignition voltage generator which emits high voltage pulses during operation of the circuit arrangement. The ignition voltage generator has a low impedance, in particular low inductance, and the high voltage pulses produced thereby initiate ignition of and at least approximately adiabatically head a plasma channel in the flash tube. The ignition voltage generator is fundamentally capacitive. In one embodiment of the invention it comprises a second voltage source for charging a second capacitor connected in parallel with the flash tube, whereas in another embodiment the ignition voltage generator contains a piezoelectric crystal or a pyro electric crystal.

Abstract: A pulse discharge lamp, in particular an electronic flash tube, includes a substantially cylindrical discharge tube which, at each end, has an electrode which serves as a cathode or anode and which may be mounted on a lead through pin. Each electrode is constructed such that there is substantially uniform interval between the electrode and the discharge vessel wall radially of the electrode. On the external wall of the tube a longitudinal wire, strip coating, transparent coating or the like is carried as an ignition electrode and extend substantially along the interval between the other mentioned electrodes. At least one of the electrodes, or its mounting, has a metal band attached thereto, bent and spread in such a fashion that its distal end lies at a shorter distance from the ignition electrode than the electrode which supports the metal band.