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How To Make Snap Shackles Safe

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tomatkins
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Re: How To Make Snap Shackles Safe

Postby tomatkins » Tue Dec 06, 2011 10:12 pm

Here is a post that I just entered on the following active KF thread:

Kitesurfing Leash attachment device - trigger snap vs spring clip
................

"...For a number of years, I have been tinkering around, with the intent of designing a safer and more durable way of connecting leashes to both the rider and the kite bar components. Here are some pictures of a prototype "noose/snare" connection device, which avoids many of the problems of a metal connector, such as corrosion, metal fatigue, spring weakening, fish-hook impalement of skin, accidental line entrapment, etc.

The design model that I used was that of the dog catchers "snare" which is a 'noose-like' device, as can be seen in the following link:

http://www.ketch-all.com/index.php?p=howitworks&n=1

The pictures should be self-explanatory.

The only modification needed to the conventional kite bar systems would be the substitution of a "ball" for the usual "ring". The rider could operate the "snare" with one hand, by pulling on the orange slider-tube with the thumb and index finger, to open the larkshead "noose"… and pushing on the slider-tube with the thumb and index finger to close the "noose". A thin bungee, on the slider-tube may or may not, be needed to keep the larkshead "noose" closed.

All comments are welcome. Maybe together, we can come up with a better solution to the problems we have seen with the conventional metal shackles.

I will move the discussion of this project to the old thread: " How To Make Snap Shackles Safe":

viewtopic.php?f=1&t=2343596..."

………………………….
Here are the 3 pictures from that thread, along with a few more showing some details of areas of interest that might stimulate discussion and criticism of the basic design.

The idea of a "soft connector" may have some merit… what do you "tinkerers" think?
.
Attachments
snare 1.JPG
snare 1.JPG (123.78 KiB) Viewed 813 times
snare 2.JPG
snare 2.JPG (125.58 KiB) Viewed 813 times
snare 3.JPG
snare 3.JPG (122.55 KiB) Viewed 813 times

tomatkins
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Re: How To Make Snap Shackles Safe

Postby tomatkins » Tue Dec 06, 2011 10:25 pm

Here are a few more pictures, showing the two places whereI have used brown thread to (1) Attach the inner tube to the long internal pigtail and (2) Attach the top bend of the larkshead to the outer slider-tube. The sewed areas carry no load when the leash is under stress, and only serve to help to position the long pigtail, when the "noose" is being opened or closed.
Attachments
snare 4.JPG
snare 4.JPG (125.12 KiB) Viewed 807 times
snare 5.JPG
snare 5.JPG (119.53 KiB) Viewed 807 times
snare 6.JPG
snare 6.JPG (116.61 KiB) Viewed 807 times
snare 7.JPG
snare 7.JPG (123.88 KiB) Viewed 807 times


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