From: Richard Sullivan (richsul@earthlink.net)
Date: 10/25/01-08:37:34 AM Z
Too bad. The article I posted seemed to indicate that some movie projectors
still used carbon arc and when I worked at City Hall in LA (I've been
retired from their for 6 years) my office used to look down on the street
and many films were made using the City Hall chambers and surrounds as a
setting and if I am not mistaken they stilled used carbon arcs. As you say:
instant on and color stabilization. This could well be a factor for their
continued use. Dick Knoppow here is quite a film and movie technology
historian and maybe he'd know. Rods should not be too hard to glom onto.
--Dick
At 01:11 AM 10/25/2001 +0200, you wrote:
>Richard Sullivan FRPS wrote:
> >
> > Sam,
> >
> > No problem with getting the rods. Apparently they are the same as sold in
> > welding stores and are still used in movie projectors in outlying areas.
> >
>
>Richard,
>
>Copper mantled carbon rods from welding store do not work. I tryed it.
>Iīv got 30 cored carbon rods Le Carbonne brand, 12, 14 and 18 mm dia,
>length 250 mm, and I recon that a pair of rods will last about 4 hours
>of burning time. I am still looking to buy more rods. I found a
>company in USA which makes them but I didnīt have time to contact them
>and ask for details: http://wwww.nationalspecialties.com/
>
>My antique carbon arc light is an open fixture and lightens
>horisontaly so a have to tilt my vacum frame verticaly. It is conected
>over the transformer 220V to 45 V AC, 40 Amp. The transformer is very
>havy and today I donīt understand how I put it in the place.
>
>To teach my grand children about darkroom dangers I turned that light
>on in their presence and humming from the arc and the transformer
>plus that strong light scared them enough not to touch the darkroom
>door without me.
>
>The light is very strong and consistent, no warm up time. I use it
>occasionaly for exposing of photogravure tissue. Seven minutes at
>0,8 m distance. No, I donīt look in the arc, and I donīlike to look
>in the sun either. The switch is five meters from the light, I donīt
>see the arc, I just leave the room when exposing.
>
>Kemal
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