Lamp having amalgam contained in a porous silicate mass
AssigneePatent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
InventorsLothar Busch, Gunter Franck
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Abstract
Mercury vapor discharge lamps in which the amalgam is contained in a porous solid-state) silicate mass which is secured to an internal surface of the lamp. The invention also provides electrode-containing components for fluorescent lamps wherein the component has an amalgam-forming composition contained in a silicate mass secured to a portion of the said component. The invention further provides a method of manufacturing said electrode-containing component and said lamp.
Claims9
A low pressure mercury vapor discharge lamp of the fluorescent type comprising a light-transmitting envelope sealingly enclosing spaced discharge means and an amalgam contained in a porous silicate mass which is secured on an interior surface of said lamp which determines the equilibrium pressure during operation of the lamp,
- said amalgam comprising mercury and an amalgam-forming metal,
- said amalgam-containing porous silicate having been prepared by admixing the amalgam-forming metal in a water glass solution having a density between 1.35 and 1.39, with a weight ratio on a dry basis of amalgam-forming metal to water glass of from 15:1 to 0.5:1.
Dependencies are inferred from the claim text.