Eyeshield for a welder's mask

Details Eyeshield for a welder's mask Eyeshield for a welder's mask

1999-04-21

2000-02-08

Neas, Michael A.

Apparel

Guard or protector

For wearer's head

359361, 349 14, A61F 906

Patent

active

060215208

ABSTRACT:
A welder's eyeshield includes a helmet having a face portion with a lens window provided thereon, a liquid crystal assembly mounted on the lens window, an optical filter juxtaposed with the liquid crystal assembly on the lens window, the optical filter being made of a plastic material compounded with a dye material for attenuating infrared and ultraviolet light, and a control circuit electrically connected to the liquid crystal assembly for controlling light transmissivity of the liquid crystal assembly.

REFERENCES:
patent: 4071912 (1978-02-01), Budmiger
patent: 4155122 (1979-05-01), Budmiger
patent: 4637678 (1987-01-01), Moss et al.
patent: 4878748 (1989-11-01), Johansen et al.
patent: 5519522 (1996-05-01), Fergason

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