Tungsram Reszvenytarsasag

Tamas Palotai

Jozsef Fulop

Sandor Lukacs

Andras Czeiler

Miklos Hargitai

Gyorgyi Horvath

Tibor Lakatos

Gyorgy Bakdos

The present invention relates to low-pressure discharge lamp having a discharge tube filled with mercury and a noble gas, sealed in a gas-tight manner and provided with electrodes at its ends and having a cap connected to the discharge tube and contact components for connection to a power supply, the discharge tube ends containing the electrodes are arranged adjacent to each other, the electrode-side ends of the discharge tube are fixed--e.g. by means of an adhesive--in the cap, at least a portion of the electrode leads is fixed in the holes of the connecting part of the cap and is connected to conduct electric current, with at least a part of the contact components protruding from the outer side of the connecting part. According to the invention the contact components (1) are completed with connecting extensions (1a) located in the inner space (2a) of the cap (2), at least a part of the leads (4a) is fixed to the connecting extensions (1a) of the contact components (1) and the joint (5) between the leads (4a ) and the connecting extensions (1a) is also arranged in the inner space (2a) of the cap (2).

Low-pressure discharge lamp

The luminescent material(s) optionally composed of more color components are suspended in the solution of active agent(s) and treated with 0.5 to 10% by weight of glass forming acid or a mixture thereof, preferably boric acid or phosphoric acid calculated on the weight of the luminescent material. Then a solution comprising 1 to 15% by weight of aliphatic amines calculated on the weight of the luminescent materials is added and the mixture thus obtained is homogenized.

Process of surface treating luminescent materials

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Budapest, Hungary

Tamas Palotai