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What's this called?

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  • #61
    Re: What's this called?

    It's a xenon short-arc lamp invented in the 1940s in Germany. Used for high power projectors and various other high intensity lighting. In the olden days they used to use crude carbon arc lamps for cinema movie projectors. The concept of the carbon arc dates back to the 1800's.
    Last edited by Newman; 04-25-2007, 11:25 PM.

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    • #62
      Re: What's this called?

      By the looks of it, I'd say it's a 15kW unit. That's just a wild a$$ guess though

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      • #63
        Re: What's this called?

        Pop the glass off that thing, run the voltage through and that would make one kick a$$ welder! LOL
        Jim Don

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        • #64
          Re: What's this called?

          All of you are getting closer and because if Mama Nautre behaves herself Woussko will be taking a few days off from this forum, here is comes. Newman is closest and Skeeter has the right idea with the 15,000 Watt part. What you see is a liquid cooled 15KW Short Arc Xenon gas discharge lamp used in a IMAX movie projector. Anyone handeling this has to wear special armor. If it busts it really goes KaBoom. They demand great respect. I have seen a similar one rated at 10KW used in a search light. When I get a chance I'll look up and post some links to writeups about carbon arc search lights and such. Back when I was quite young, I remember an older movie theatre in my area that actually did have a carbon arc 70 mm projector with huge reels of film. The projection crew (4 guys) had their work cut out. When it was time to change reels (took 2 guys to do it), they would have a 15 minute break. Most of that time was for cool down as the carbon rods had to get changed too. What a difference today!!! I also remember at a large concert hall where they had 3 monster spot lights and they were carbon arc. I can see it now where the OSHA crew walks in and demands power be shut off at once. Those bad boys were "Hell On Earth" but some crazy people just loved them anyway.

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          • #65
            Re: What's this called?

            Just some things some of you might like to read up on.

            Xenon Arc Lamps: http://en.wikipedia.org/wiki/Xenon_arc_lamp

            Carbon Arc Lamp - 1: http://en.wikipedia.org/wiki/Arc_lamp

            Carbon Arc Search Lights (Some good fun reading and more links): http://www.geocities.com/bobz299/bmeza6.htm

            More on searchlights - Fixed up into super stock version "The Dominator" : http://www.carbonarcsearchlights.com/

            http://einhornpress.com/searchlight.aspx


            I wish I could find my old pictures of 2 restored STRONG brand carbon arc spotlights. Origionally they were powered by a steam (yes steam) engine driven DC generator rated at (2) loads of 100 Volts and 75 Amp. each. The last they were even tried out was back in the late 70s and with the rods kept closer, they used an engine driven DC arc welder generator. It worked pretty well from what I heard. After that they were painted and never used again. I have no idea what ever happened to them, but the live show theatre (small town) is still there and I bet they still are inside it somewhere in safe keeping. Maybe one of the owners took them home.
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            Last edited by Woussko; 04-26-2007, 06:57 PM.

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