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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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Media Blackout - Custom Cables and AKS

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Tai Audio

Metropolis Post

Opal

Willys Widgets

Wooden Camera

CineLab

Broadcast Solutions Inc

Rig Wheels Passport

The Slider

Paralinx LLC

Abel Cine

CineTape

FJS International, LLC

Technodolly

Aerial Filmworks

Glidecam

Visual Products