Safety Thimble for the U-SAVER

Interesting concept, as the line threaded through the thimble is already rated (or should be!) for the purpose. A.R.T. has a thimble as a component of the Rope Guide that is large enough for the task, but I am not sure if it is sold separately. In fact, I rather doubt it, as the line is stitched into it. The next question would be: Is the line spliced in or stitched in? Is it a single strand or a loop? If doubled, how would the strands be held in place at the entrance of the thimble? Etc, etc, etc...
 
The purpose of a thimble is to maintain a greater bend radius in the rope in order to preserve the breaking strength of the rope.It is more practical for the rope to absorb the energy and not the thimble. Even if the thimble could be crushable (in my opinion)it would not be able to absorb enough energy to make it worth it. You would need to have a very wide thimble.
 
I know that somehow you're right. There's distance involved. A Yates Screamer rips open to slow a climber over a large distance. I haven't got a clue how to figure something like that for a hunk of metal.
 
There was a piece of webbing sewn with a zipper, like a Yates Screamer, built into one of the ART false crotches. It was simple to inspect and simple to manufacture. Much easier than using metal to be a release or shear pin.
 
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hey WAZZAT? Is that the A.R.T? What's the ID?

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ART RopeGuide 2010.

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I should have said ... what's the internal diameter?
 
Thanks for the info. I was breathing hard until I googled it. It's tough to work a $375 price tag into a $40 budget! But it sure looks similar ... !
 
This idea is slilly, it'll never work. Two small problems: time and distance. To reduce impact force on a climber, a safety device has to extend the time of the fall. That needs distance, like the Yates Screamers. That's never going to happen with a metallic structure the size of a climbing thimble.

The name is wrong. Not a "safety thimble", how about an "indicating thimble". Picture a climbing thimble with two little tabs maybe a quarter of an inch apart. If the thimble sees more than, say, 1000 pounds, it deforms permanently and the tabs bend together to touch each other. It becomes an indicator that the climb system has been overloaded and needs to be inspected/replaced.

I'm trying to imagine a lightweight climbing thimble that will pass a 5000+ lb. system certification due to the strength of its cordage but it only packs enough steel/aluminum to deliver a 2x overload of its working load. Remember I'm trying to get to something lightweight and cheap to use in the U-SAVER, but I think the thimble could be useful in other climbing and rigging.

Thoughts?
 
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