DE185496C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 21 /. GROUP

FELIX KUSCHENITZ in VIENNA.

Electrolyte lamp. Patented in the German Empire on June 16, 1905.

The present invention relates to an electrolyte lamp, i. i. on an electric Incandescent lamp, the body of which is made of boron nitrogen.

Boron nitrogen, whose phosphorescence and glow resistance is known, was already used experimentally to make filaments for electric light bulbs.

However, different organic binders have been used in the production of such threads served. As a result, however, it was possible to bring the incandescent body into the shape of a thread and thereby also made it conductive; but since boron is a big one Has an affinity for carbon, conductive boron carbide is formed during annealing but, since it is an electrolyte, it breaks down into its constituent parts, the latter then, in the Annealed under vacuum, lightly atomized and fogged up the glass wall of the thread container.

So instead of a boron nitrogen thread you had a boron carbide thread, which was in a Nitrogen atmosphere glowed.

In order to now use boron nitrogen practically as a luminous element for electric light bulbs to make it, it is subjected to the following procedure:

Chemically pure ones are pressed in a known manner. Boron nitrogen, which is a white Amorphous powder represents, under high pressure into thin rods; these disintegrate not to powder if the pressure applied was high enough.

Subsequent annealing in nitrogen causes the rods to sinter together a little become more coherent as a result. To with the help of such chopsticks the object of the present. To produce the invention forming electrolyte lamp, the former are by means of ■ Appropriate clamping devices connected to the power supply wires and in a glass bulb melted down. Conaxial to the chopsticks are located in the glass bulb fused two platinum wires, the ends of which are a few millimeters inward from the rod are removed; to the outside there are eyelets or clamps on the platinum wires. If this glass container is now well evacuated and subsequently filled with pure nitrogen is, so one can by electrical sparks of the boron nitrogen rod, Λνεηη it connected to a power source, as is known, make conductive and glow bring.

The accompanying drawing shows two embodiments of such lamps in a view. «Denotes the boron nitrogen rod. bb are the power supply wires provided with clamping devices, c is the pear filled with pure nitrogen, dd are platinum wires, the ends of which are respectively. whose coils connecting them are a few millimeters away from the glow stick. These platinum wires are used to preheat the rod by means of electrical current sent through it, e is the tube for evacuating the glass bulb c.

In Fig. Ι an over bell / is shown as standing in use; this overdell is also g e-va-

kuiert to prevent the heat dissipation of the inner bulb c to the outside.

That instead of using sticks made from pure boron nitrogen, hollow cylinders made from it are also used can is self-evident.

A change (chemical conversion) of the white luminous body cannot be done occur.

Claims (1)

Patent claim: Electrolyte lamp, the luminous body of which is produced by pressing without a binder is warmed before the electric current slides through, characterized in that, that the luminous body consists of chemically pure boron nitrogen. 1 sheet of drawings.