Tungsten halogen lamp

Details Tungsten halogen lamp Tungsten halogen lamp

1975-09-03

1977-05-31

Demeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313174, 313223, H01K 150

Patent

active

040271897

ABSTRACT:
A linear tungsten halogen lamp which can be burnt at any desired angle is made by selecting the gas filling and the halogen or halogen-containing compound to satisfy certain conditions which can be mathematically expressed. If these conditions are satisfied, the separation of halogen which occurs in conventional linear tungsten halogen lamps when burnt at angles inclined to the horizontal is reduced to an acceptable level. It is found that the maximum degree of separation of the halogen, herein denoted by .gamma. max, can be calculated from lamp parameters as a function of the thermal diffusion coefficient of the halogen in the filling, the tube length, the temperature difference between the filament and the tube wall, the average gas temperature, the radius of the coiled filament and the inside radius of the tube.

REFERENCES:
patent: 1925827 (1933-09-01), Van Liempt
patent: 2882435 (1959-04-01), Millner et al.
patent: 3240975 (1966-03-01), English et al.
patent: 3418512 (1968-12-01), T'Jampens et al.
patent: 3585435 (1971-06-01), T'Jampens
patent: 3644772 (1972-02-01), Yuge
patent: 3712701 (1973-01-01), Johnston et al.

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