From: Mike Rosing <rosing@neurophys.wisc.edu>
Newsgroups: sci.physics.plasma
Subject: Re: Discharge lamp operating circuit: a question of novelty?
Organization: University of Wisconsin, Madison
References: <b3las1$ec3t$1@saturn.cs.uml.edu>



Norm wrote:
> I'm trying to locate any and all references that discuss high-pressure
> discharge lamp operating circuits that predate December 1998.
> Specifically, a circuit that attempts to reduce lamp flicker and
> increase lamp life by staggering or changing or gradually increasing
> the current voltage in the start of the initial period.
>
> A good example of what I'm looking for can be found in US Pat No.
> 6239556, Figure 3.
>
> This technique of alternating the current does not seem particularly
> novel and I am assuming some of the experts in the field can point me
> in the right direction.
>
> Feel free to email or post with any questions. Thank you.

My first guess would be to look at WWII search lamps. They were
hot and some used high pressure tubes. Anything after that would
be a basic modification from these first brute force devices.

Patience, persistence, truth,
Dr. mike

--
Mike Rosing
www.beastrider.com BeastRider, LLC
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