Lighting-Gallery.net
General => Off-Topic => Topic started by: micole66 on June 12, 2017, 02:19:41 PM
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There are tubular Mercury vapor lamps?
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There were tubular mercury lamps, but this is an obsolete type of mercury lamp. Tubular mercury lamps were mainly medium pressure mercury lamps and old high pressure mercury lamps to retrofit the medium pressure lamps:
http://www.lamptech.co.uk/MA.htm
http://www.lamptech.co.uk/MB.htm
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Tubular mercury vapor lamps do exist, but they are rare.
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There are tubular Mercury vapor lamps?
What are you trying to build ? And yes there is but finding them is a challenge they haven't been made for many years.. but getting a metal halide in a tubular is easy, the light color is similar only they are more efficient, so you get more light for less watts..
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Long ago--tubular mercury lamps were used in copy machines and Diazo machines.I an old projection handbook I have they descrfibe a Gamont-Kalee 35MM film projector that used a small,tubular,water cooled mercury lamp instead of carbon arc or xenon.
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These were special linear exposed mercury arctubes. This isn't what micole66 asked. He asked about the existance of mercury lamps with tubular outerbulbs, which are antiques, since manufacturers moved to pear, BT and elliptical outer designs, because of the use of color correcting phosphor in most of mercury lamps, and to save costs in manufacturing the clear mercury lamps without changing the design.
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And Diazo machines (blueprint printer) need a UV light source which isn't the safest of things to operate without some form of protection from the UV light, but yes those lights are fairly easy to obtain since blueprint printers are still in use..
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In the US the blueprint machine is no longer in common use---Chemical costs-availability of blueprint paper.They have been replaced by digital blueprint and large format scanners-Used one at a copy place-scan your original drawing-you can even get a digital copy as well as a paper or mylar one.Other tubular mercury lamps----'How bout Cooper Hewett lamps?The predescessor to the modern flourescent lamp-have an older Electricans Handbook that describes these-they were made in AC or DC versions.In the older Diazo/blueprint machines the UV bulbs were totally enclosed-you couldn't even see them.And the cover had an interlock so the UV bulb won't come on unless the cover panel was put on the machine.
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Blueprint has been replaced by diazo printing and than by digital printing and digital displays. I think micole66 refered to mercury lamps with tubular outerbulbs and screwbases, which limited to medium pressure mercury lamps and their retrofit tubular high pressure mercury lamps. Mercury lamps for printing, are linear lamp and not tubular lamps.