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(09-19-2012, 02:02 AM)Rickabilly Wrote: 1. at least a couple of spare clears,
clears are disposable and should be changed when they get dirty not when you can't see thru them any more like some I have seen with so much splatter on them that the sun couldn't of melted it off.
They are there to protect the colored lens and you should have one on both sides not just the outside of the lens.
Myself I don't like having to replace high dollar glass gold tinted lens.
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Have you ever seem what happens to a standard green glass lens if you leave the clear plastic lens off? for those that don't know the green lenses are very prone to any spatter that touches them sticking.
It was one of those Apprentice practical jokes back in the day, when doing positional weld training, you'd slip into the workstations at lunch time and remove the plastic lens from someone's shield, of course when welding over head a lot of sparks find their way onto your shield, and without the clear they stick hard to the green glass, within an hour of over heads there is so much spatter stuck on the green lens that it is almost opaque,
It is one of the quirks of the human eye that you don't notice until it's too late, Apparently the brain is programmed to ignore missing pieces of information in your field of vision that arise from the retina having inactive areas where veins, damaged areas and the optic nerve are situated, as a result we all have blind spots that the brain fills in for us, when we look through a welding lens we can only see where the bright light is situated with everything else being black, this makes it really easy for the brain to fill in the spatter areas until you only see a vague bright spot, The best one I ever saw was literally covered in spatter it was hard to believe that any light at all would have passed through it.
It just so happened that the subject of this practical joke was half way through his test sample which was to go out for X Ray and apparently his welding certification was on the line, so there was a bit of a backfire with the "jokee" being told that before doing a critical weld he should have checked his gear properly so whatever the outcome was, he was stuck with it, and the Joker was sent home without pay for the afternoon, They were a bit tough on practical jokes at that place as they should be I suppose, but it all turned out for the best, as the weld came up defect free, or at least acceptable, so no real loss.
Regards
Rick
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09-19-2012, 01:44 PM
(This post was last modified: 09-19-2012, 01:46 PM by stevec.)
Ya, I was amazed at how plastic sheds spatter and glass gets pitted in no time. Way back in the early days I noticed the outer lens on my first helmet was getting kinda cloudy and took the lens assy apart. AHA! no wonder! this outer piece is plastic!
I immediately cut myself a piece of single diamond (thin) glass and put it in. Well I didn't get through the job at hand before I put the plastic one back in.
I was off to my welding supplier the next day for a supply of clear plastic lenses.
Rick, you say you put 'em on the inside too, is that because you've had laser eye surgery?
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(09-19-2012, 01:44 PM)stevec Wrote: Rick, you say you put 'em on the inside too, is that because you've had laser eye surgery?
It's because spatter WILL get into the interior of the hood as well. Which reminds me of another issue. That spatter will fuse to the inside lens surface of the hood - along with your eyeglasses! If you wear prescription eyeglasses - take them off and place them far away from your welding area. Wear a pair of safety glasses instead combined with a "cheater" lens in your helmet if you need to.
I've ruined several pairs of my daily wear eyeglasses that way getting in a hurry and forgetting to take them off.
Willie
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Can someone post a picture of these "cheater" lens' that I keep hearing about that are used for welding?
Thanks,
Ed
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Willie, you missed it, I heard a comedian say " I had laser surgery and sadly found out that lasers don't shoot out of your eyes" .
Sorry everyone , must be local humour.
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09-19-2012, 05:34 PM
(This post was last modified: 09-19-2012, 05:42 PM by Highpower.)
Must be. Still funny though!!
Thanks Steve!
Ed, this is a cheater lens....
They are available in many different diopters - sort of like the cheap reading glasses you find at the drug store. Most welding helmets have a recessed area behind (or in front of) the welding lens, underneath the protector sheet that the cheater fits into. So your "eyeglasses" are then a part of the welding helmet.
Willie
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Oh jeez! another crutch, thank you.
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