21 Oct
2011
21 Oct
'11
1:25 p.m.
On 20 Oct 2011 at 21:03, Tony Duell wrote:
Same over here. Before the intruction of CRTs with integral implosion
protection in the early 1960s, TV sets had either a sheet of laminated
safety glass in front of the screen or later a sheet of perspex or
similar. Of course the _very_ early TVs over here didn't bother becasue
the viewer didn't look directly at the screen. The CRT was mounted
vertically with the screen at the top due to the long length of the neck
(small defleciton angle) and you saw the picture reflected in a
front-silvered mirror in the lid of the cabinet, But I digress.
Certainly my 1961 Brimar databook refers to 'Twin Panel Teletubes' which
have a second layer of glass (or plastic in some cases) bonded ot the
screen to and an implostion protection.
Unless you _know_ the outer glass layer has no
safety function, I
certianly wonldn't remove it.
In the US, it was not uncommon for old TV manufacturers to use a
separate flat sheet of glass in front of the (unprotected) screen for
just this purpose.
The guy on YouTube, fron what I can tell, does not attempt to use a
uniform layer of PVA to reattach the implosion shield, but merely
sticks the shield on at the edges. I suppose this may be sufficient
for small CRTs.
I'd not want to be sitting in front of one...
-tony