Apparatus for recovering fluorescent material from mercury vapor

Electric lamp or space discharge component or device manufacturi – Apparatus – Repairing – converting or salvaging means

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15304, H01J 900, A47L 700

Patent

active

047158387

ABSTRACT:
A method and apparatus for recovering the luminescent material from a mercury vapor electric discharge lamp, or like lamps, in which the ends of the lamp bulb or tube are separated from the intermediate bulb part (22) subsequent to equalizing the pressure in the lamp. The luminescent material (30) is loosened from the inner wall surface of the bulb part (22) with the aid of a stripping device (27) which is arranged to be inserted into the bulb part (22) from one end (26) thereof, and in which the loosened material is collected with the aid of a suction device (25) connected to the other end (23) of the bulb part. The stripping device (27) comprises a stripping head (29) mounted on one end of a rod (28). The rod (28) is arranged to move the stripping head (29) backwards and forwards in the bulb part (22), the stripping head (29) being guided in a manner to form an annular gap between the head and the wall of the bulb part. The luminescent material is loosened by the amplified air stream created by the suction device (25), passing through the gap.

REFERENCES:
patent: 2116129 (1938-05-01), Stringer
patent: 2122117 (1938-06-01), Stringer
patent: 2267435 (1941-12-01), Thomas
patent: 2669217 (1954-02-01), Pearson
patent: 3679284 (1972-07-01), Thall
patent: 4268306 (1981-05-01), Bjorkman

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