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Should I fear a discharge from Static?


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Old 01-07-2013, 05:18 PM   #21
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Quote:
Originally Posted by Vikingdad View Post
Aren't those old timey dynamite detonators with the plunger on top of a wood box just a Van Der Graaf generator with a two conductor wire going out to the charge?

(Edit: Now I want one of those things!)
Have you every seen an old crank phone? It's much like the magneto that c3shooter mentioned.


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Old 01-07-2013, 05:33 PM   #22
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Have you every seen an old crank phone? It's much like the magneto that c3shooter mentioned.
Yes, I have a couple of those.


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Old 01-12-2013, 08:44 AM   #23
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Quote:
Originally Posted by Vikingdad

Yes, I have a couple of those.
Dare you to hold the wires and crank that Handel. :-)
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Old 01-12-2013, 04:45 PM   #24
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I worked around grain elevators for many years. They do everything possible to prevent sparks, even in some areas of prohibiting nylon jackets. All tools must be non-sparking metals. Cutting and burning must be done in a very controlled envoirment.

OSHA once determined static electricity sparks were "cold sparks" and not likely to set off a dust explosion, but precautions should be implemented anyway.

Bob Wright
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Old 01-12-2013, 05:18 PM   #25
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Dare you to hold the wires and crank that Handel. :-)
I had a school aged friend that had one of those phone magnetos and yes he would tell people who didn't know any better to do just that, I learned quickly.
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Old 01-12-2013, 05:23 PM   #26
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I worked around grain elevators for many years. They do everything possible to prevent sparks, even in some areas of prohibiting nylon jackets. All tools must be non-sparking metals. Cutting and burning must be done in a very controlled envoirment.

OSHA once determined static electricity sparks were "cold sparks" and not likely to set off a dust explosion, but precautions should be implemented anyway.

Bob Wright
OSHA has there head in a dark place, I've seen pics and heard of people being killed by grain dust explosions, they are incredibly powerful.
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Old 01-12-2013, 05:45 PM   #27
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While static is not going to cause discharge of a loaded artridge, dust explosions ARE a major hazard in industry. In the past 25 yrs, 119 American workers have been killed in dust explosions, and over 700 injured. In events like this one from Georgia-

imperial-sugar.jpg

Guess what destroyed this plant- killed 14 workers, injured 36 others?


Sugar. Sugar dust.
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Old 01-12-2013, 05:57 PM   #28
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Never really understood why grain dust was soooo explosive, probably safer that way.


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Dare you to hold the wires and crank that Handel. :-)
Quote:
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I had a school aged friend that had one of those phone magnetos and yes he would tell people who didn't know any better to do just that, I learned quickly.
Mom still has the phone my friends and i and my sister would spin to see who could hold on the longest.
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Old 01-12-2013, 07:24 PM   #29
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'Gello- ANY combustible dust (just about anything except powdered rock, glass or lead) when it is suspended in air- exposes ALL of its surface to being ignited AT ONCE. The speed of combustion goes up tremendously.
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Old 01-13-2013, 01:30 AM   #30
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Quote:
Viking: OSHA has there head in a dark place, I've seen pics and heard of people being killed by grain dust explosions, they are incredibly powerful.
I had the opportunity (?) to investigate several elevators and feed mills that had experienced grain dust explosions. The force of the blast and fireballs was awesome in its power, nearly compared to a nuclear blast. I saw truck dumpers blown out of the ground and hurled through the air. One plant I saw a concrete wall blown out, yet a jacket hanging nearby was still hanging.

Bob Wright


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