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Konvas spring motor


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#1 Paul Bruening

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Posted 16 May 2009 - 10:58 AM

Has anyone here ever had and used a Konvas spring motor for a 1M, or even seen one? How long will they run on one wind-up?
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#2 John Sprung

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Posted 16 May 2009 - 02:17 PM

You'd probably have to make one. Something similar to an Eyemo or Edison cylinder phonograph spring should do it. Start with a piece of 4" schedule 80 black pipe an inch long, weld a plate on one side, and fill it with 1" blue tempered clock spring, maybe 60 - 80 ft, IIRC. Gotta learn how to draw the temper on the ends and make the attachments. Load it on a lathe, big springs like that pack a whole lot of energy in the unwound position, let alone when you crank them up. Then all you need are gears and a governor.



-- J.S.
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#3 Paul Bruening

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Posted 16 May 2009 - 03:20 PM

Okay, John. Nothing to it. I've got a few minutes to spare today. I'll knock one out.
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#4 John Sprung

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Posted 16 May 2009 - 08:38 PM

Great -- maybe design it as a multi-purpose spring motor that you could interface to the Konvas or to any of the Arri model II series.... Hmmm -- what else might you want to drive with it?



-- J.S.
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#5 Bernie O'Doherty

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Posted 16 May 2009 - 08:47 PM

Hi John,

Sometimes I can't help myself. I'm always seeing the funny side of things.

Scroll down


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Spring


Has



Sprung !!!!


Sorry John, I owe you an Irish beer. You could always call me Hickory Dickery O'Dockery..........
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#6 James Steven Beverly

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Posted 16 May 2009 - 11:07 PM

I have one thanks to a member of this board to whom I will be eternally grateful, though I've never used it and I'm not sure if my camera, a KSR-1, was designed to work with it but regardless, I'll have a modification done to MAKE it work at some point if I have to. It is in MINT condition, VERY cool and rare as hen's teeth.
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Tai Audio

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Visual Products

Glidecam

Gamma Ray Digital Inc

FJS International, LLC

Paralinx LLC

New Pro Video - New and Used Equipment

Abel Cine

Media Blackout - Custom Cables and AKS

CineLab

CineTape

Broadcast Solutions Inc

Technodolly

rebotnix Technologies

Aerial Filmworks

Metropolis Post

Ritter Battery

The Slider

Wooden Camera