Learning to weld with a non-aircraft project

The lense in these shields is often so dark that you literally cannot
see your work with the shield down, so you get yourself arranged with
the shield up, and configured so that it will drop down over your face
with a nod. Then you get set to weld, hold you hands where they need
to be, nod your head and begin.



I bought one of these electronic units that allow you to see your work, then
darken as soon as you strike an arc.

A super investment.

Cheers:

Paul
NC2273H

Paul wrote:

The lense in these shields is often so dark that you literally cannot
see your work with the shield down, so you get yourself arranged with
the shield up, and configured so that it will drop down over your face
with a nod. Then you get set to weld, hold you hands where they need
to be, nod your head and begin.


I bought one of these electronic units that allow you to see your work, then
darken as soon as you strike an arc.

A super investment.

Cheers:

Paul
NC2273H

Amazing how bright that 1/20000 second can be, isn't it.

Rihcard

"Richard Lamb" wrote in message
...

Amazing how bright that 1/20000 second can be, isn't it.

My learned brother and I were discussing those hoods one day and I axed him
if that is the technology used in the military to prevent eye damage from
laser attacks. IIRC, he told me that a laser could burn out your optic nerve
before the glass wen t dark.

That laser light must be a lot faster than reg'lar light, huh?

Rich S.

In article ,
"Rich S." wrote:

"Richard Lamb" wrote in message
...

Amazing how bright that 1/20000 second can be, isn't it.

My learned brother and I were discussing those hoods one day and I axed him
if that is the technology used in the military to prevent eye damage from
laser attacks. IIRC, he told me that a laser could burn out your optic nerve
before the glass wen t dark.

That laser light must be a lot faster than reg'lar light, huh?

Rich S.



I hope that you didn't injure your brother too much when you axed him!

"Orval Fairbairn" wrote in message
news

I hope that you didn't injure your brother too much when you axed him!

Naw. He's too smart to get hit. PhD's in physics & math, Master's in
languages & economics. Speaks english, rooshian, japanese, german, klingon,
and C plus. Or something like that. Ex-fighter pilot, too. He's my hero.

Rich "The dumb one" S.

Don't know much about the science of it, but I know that the different types
of laser protective glasses that I've been issued in the military are not
dark at all. They are simple plastic safety glasses with a very light
colored, slightly reflective coating. I assume it employs some sort of
polarizing or refractory principle to disrupt the beam. We never carry
them.

"Rich S." wrote in message
...
"Richard Lamb" wrote in message
...

Amazing how bright that 1/20000 second can be, isn't it.

My learned brother and I were discussing those hoods one day and I axed
him
if that is the technology used in the military to prevent eye damage from
laser attacks. IIRC, he told me that a laser could burn out your optic
nerve
before the glass wen t dark.

That laser light must be a lot faster than reg'lar light, huh?

Rich S.

Ed Haywood wrote:
Don't know much about the science of it, but I know that the different types
of laser protective glasses that I've been issued in the military are not
dark at all. They are simple plastic safety glasses with a very light
colored, slightly reflective coating. I assume it employs some sort of
polarizing or refractory principle to disrupt the beam. We never carry
them.


LASER is special in that it is monochromatic, or one color. If you know
the type of laser, you can build a lens that will filter exactly one
wavelength. A dark lens takes the brute fore method of blocking everything.

--
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
alleviated by information and experience."
Veeduber