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Master Arm Mechanics

Master iso-elastic

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#1 Robert Stanton

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Posted 11 October 2015 - 04:18 AM

Hi

 

I have a question for anyone who owns/used to own the master series arm.

 

How were they adjusted for different weights/float points?

 

http://www.steadicam...urce_manual.pdf

This manual claims there was a single adjustment knob for the arm

 

http://www.google.co...tents/US5435515

This is the patent filed for the mechanics of what I believe is the Master series arm, though it's never explicitly stated so feel free to correct me on that. 

Anyway in the patent there are a couple of ways described to adjust the lifting power and 'Iso-Elasticity'*. One is to have separate vertical and lateral controls for the cable terminations, the other is to have a single control which moves the termination diagonally downwards instead of straight down.

 

There's also a third method described which is a simple vertical adjustment of the cable but I'm assuming this wouldn't be used since it's the crudest and simplest of all three.

 

I'm just curious which of these methods actually made it into the final design

 

Thanks

 

Robert 

 

 


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#2 Victor Lazaro

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Posted 11 October 2015 - 09:29 PM

I might be wrong but I was under the impression that the Master arms were simply vertical knobs, the zephyr and Flyer arms are with diagonal termination, and the G50/G70 have the two knobs.
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#3 Jerry Holway

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Posted 12 October 2015 - 08:12 AM

Lift knobs are not vertical in the MS arms. It's part of the magic of those arms - and the patent., from 1995, covers what became the Master Series arm. 


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#4 Victor Lazaro

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Posted 12 October 2015 - 09:43 AM

gotcha. Thanks for clarifying.


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#5 Robert Stanton

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Posted 12 October 2015 - 06:30 PM

Ah thanks, I just find it quite interesting to see the ways in which Steadicam has tried to continually improve their products. Honestly the novelty of spreading the springs throughout the arm to increase the length still impresses me.


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