What powered the Silent Film Projector?

In article <JoMG1H.FEH.TakeThisOut@wjv.com>, Bill Vermillion <bv.TakeThisOut@wjv.com> wrote:
>In article <1190206317.922019.304720.TakeThisOut@g4g2000hsf.googlegroups.com>,
>Robert Moulton <robertjohnmoulton.TakeThisOut@gmail.com> wrote:
>>What about the light source on the projector? When did it switch from
>>carbon arc to a more traditional light bulb?
>
>I was last in a projetion booth in the mid-1950's and they were
>still using carbon arcs then.

Some housees still are, although it is becoming somewhat rare now.
(If anyone has a source for Enarc reflectors, please let me know.)

Note that modern cinema installations use xenon arc lamps, which
are discharge lamps that more closely resemble carbon arc than a
standard incandescent bulb. The light is still produced by
electricity passing across a gap between two electrodes; the major
difference is that the process happens inside an xenon-filled quartz
envelope rather than in the open air.

--
Scott Norwood: snorwood.TakeThisOut@nyx.net, snorwood.TakeThisOut@redballoon.net
Cool Home Page: http://www.redballoon.net/
Lame Quote: Penguins? In Snack Canyon?

Limelight.

Was this light source modified to fit
motion picture projectors?


http://en.wikipedia.org/wiki/Limelight