Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Ewald Posl

Werner Weiss

To provide a melt glass (10) to seal capillary spaces (9) surrounding external current supply leads (8) of molybdenum passing to molybdenum foils (6) in a pinch or press seal (7) of a high temperature, for example incandescent halogen lamp, the melt glass (10) is made of 3-10% Bi.sub.2 O.sub.3, 25%-40% B.sub.2 O.sub.3, remainder PbO. The melt glass has low toxicity and is molybdenum-compatible. An additive of barium oxide, in up to 15% and preferably up to only about 10%, may be added to the PbO. All quantities in mol-percent.

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Kissing, Germany

Ewald Posl