Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1984-05-07
1986-02-18
Lusignan, Michael R.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
427 451, 427 64, 427 66, 445 58, H01J 162, H01J 6304, B05D 302, B05D 506
Patent
active
045715220
ABSTRACT:
A method of manufacturing a low-pressure mercury vapor discharge lamp comprising a discharge tube (1), to the inner wall of which is applied a layer of luminescent material (4) by means of a suspension of the luminescent material, which suspension is brought into contact with this inner wall in such a manner that a layer of suspension adheres thereto, the non-adhered suspension disappearing from the tube, after which the layer is dried by heating a zone (14) of this layer extending along the tube circumference by means of a high-frequency electric field which from a starting point near the upper end of the tube performs such a movement with respect to the tube that the zone moves towards the lower end of the tube.
REFERENCES:
patent: 3484276 (1969-12-01), Burggraaf et al.
de Ruiter Jacob W.
de Vries Jan
Lusignan Michael R.
Spain Norman N.
U.S. Philips Corporation
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