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glass cutting
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From: Bert Pool [SMTP:bertpool-at-ticnet-dot-com]
Sent: Saturday, February 28, 1998 4:25 PM
To: Tesla List
Subject: Re: glass cutting
> From: Eleanor Flood [SMTP:eflood-at-bellsouth-dot-net]
> Sent: Monday, January 12, 1998 2:01 PM
> To: tesla-at-pupman-dot-com
> Subject: glass cutting
>
> If anyone out there is planning on making plate glass caps, please be
> warned, our neighbor gave us a couple of fine sheets of Hercules Safety
> glass. The sheets were 24" long and 8" wide. Harold thought to saw them
> into 8" square pieces to make a glass cap. I do a bit of lapidary work,
> so we have a diamond edge abrasive saw that is used to cut rocks, glass
> and the like. Harold marked the glass, donned a rubber apron, a hat and
> safety goggles, and turned on the saw. He had not cut an eighth of an
> inch into that glass when it literally exploded. There was not a piece
> of it left as big as a match head. The glass was scattered all over the
> 10' x 24' room. We have no idea what was so different about this glass
> to cause such an event. He frequently saws regular window glass and
> glass bottles for salt water caps with no problem. Anyway, if you plan
> to saw glass, just be careful. We also wonder what might have happened,
> should he have had access to the size he needed, constructed the cap and
> put the high voltage to it. Big explosion? Anyone know anything about
> this type glass.
Safety glass is specially heat treated. It makes the glass very
tough to break, but when it does break, the glass fractures into a
million small, round pieces which cannot easily cut or injure a
person. You cannot, to my knowledge, cut tempered glass in any
manner. I have built caps using tempered glass and had it explode
while in use. Very spectacular failures.
Bert
>
> Safe sparking, and safe sawing!
> Elli
>
>
>
Bert Pool
TCBFW
bertpool-at-ticnet-dot-com