Light tube with slidable electrodes

Details Light tube with slidable electrodes Light tube with slidable electrodes

1989-01-19

1990-01-30

Wieder, Kenneth

Electric lamp and discharge devices

With movable electrode or shield

313152, 313160, H01J 6106

Patent

active

048975729

ABSTRACT:
A wide angle flash tube reflector has dual involute surfaces thereon intersecting at a cusp and bent in the horizontal to intercept light from a light source adjacent the cusp and to reflect such light in a dispersion pattern that spreads the flash coverage to match extended light coverages of lenses from a normal focal length to extreme wide angle. One light source is in the form of a bent tube having adjustably positioned cathode and anode electrodes for varying the length of a plasma arc to control the extent of the dispersion pattern reflected from the dual involute surfaces.

REFERENCES:
patent: 2282325 (1942-05-01), Epstein
patent: 3059135 (1962-10-01), Mineta
patent: 3529209 (1970-09-01), Leinhard et al.
patent: 4002499 (1977-01-01), Winston
patent: 4116540 (1978-09-01), Thomas
patent: 4327969 (1982-05-01), Giutronich
patent: 4641315 (1987-02-01), Draggoo

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