Heimann Gmbh

Siemens Aktiengesellschaft

Michael Lausch

Eugen Achter

Ingo Duenisch

A flash lamp which has two electrodes of refractory metal fused into a glass housing. In order to enable a soft-soldered connection, the outer end of the electrodes is respectively connected to a soft-solderable metal coating.

Flash lamp with metal coating on an outer end of an electrode thereof

A cathode is formed such that a blackening of the inside wall of the discharge tube due to evaporated material does not occur and good heat transmission occurs. A base member (5) is provided to which a green sintered member (7) is pressed on said base member under high pressure and is then sintered which reduces its size. Soldering or welding is thus accordingly avoided. The volume of the sintered member (7) is significantly smaller than the volume of the base member (5).

Flash discharge lamp with sintered cathode member

The present invention is directed to a improved gas discharge lamp particularly for use as flash bulbs or lamps, wherein two tungsten electrodes are fused into a glass tube. In order for the lead to be soldered to an outer end of each of the tungsten electrodes with a soft solder, the outer ends of the electrodes are provided with a coating of a refractory solder, such as a hard solder or brazing compound. The coating, which has a melting point approximately at the point of fusion for the glass tube, can be applied during the step of fusing the electrodes into the glass tube.

Solder connection for an electrode of the gas discharge lamp and the

The invention is directed to a gas discharge lamp particularly to a flash bulb and a method of making the flash bulb. The cathode member is formed by a sintered member whose outer shape is matched to the inside shape of the cavity of the housing in the cathode region and this sintered member is fused in the housing to form the connection with the lead of the cathode.

A gas discharge lamp with a sintered cathode member fused to a lead and

A gas discharge lamp such as a flashbulb consisting of an anode and a cathode in a transparent housing, the cathode being composed of a sintered member made up of powdered titanium (Ti), and vanadium (V), as well as at least one of the other metals tantalum (Ta) or niobium (Nb), the particles having a grain size of no more than 50 microns, and the Ti being present in a precentage of at least 40% by weight, and the V content being at least 10% by weight.

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Taunusstein, Germany

Michael Lausch