Battery low-voltage warning apparatus for auto-darkening...

Details Battery low-voltage warning apparatus for auto-darkening... Battery low-voltage warning apparatus for auto-darkening...

G - Physics

02

F

G02F 1/133 (2006.01) A61F 9/06 (2006.01) F16P 1/06 (2006.01) G02C 7/10 (2006.01) G08B 21/18 (2006.01) H02J 7/00 (2006.01)

Patent

CA 2670903

An apparatus for annunciating low-voltage in a battery supplying electricity to an auto- darkening optical filter system (10) for a welding helmet (not shown). Low voltage is annunciated by changing, for example strobing, the opacity of the optical filter system (10).

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