Control of an automatic darkening filter

Details Control of an automatic darkening filter Control of an automatic darkening filter

2005-10-11

2009-12-29

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Glare or unwanted light reduction

With absorption means

C359S601000

Reexamination Certificate

active

07637622

ABSTRACT:
A protective automatic darkening filter (ADF) and an associated tool, such as a welding torch, are controlled by a corresponding communication unit. The invention helps to ensure that the tool is not activated before the ADF has reached its dark state. A communication channel between the communication unit and the ADF may be established using a wired or wireless medium.

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