This started by trying to give more balance to the user and avoiding the sliping part that occurs when the heel of the fornt leg (when walking) slips. This Is one of the major causes of accidentes when slipping and falling according to http://www.slipalert.com/SlipQuestions/qB-physics.htm .
So I decided to add a suppport to the sole and see what happens...
I made a wood sole with the attachment because It was hard to attach it directly to the shoe.
Because I can´t just slip and fall and try to simulate a fall. I decided to run a distance of 3 meters and try to slip and see what happens.
On the splipperiest part of the house (where I did this test) with a dry floor I slipped 80 cm.
With a wet floor 1.15 meters.
And now with my great invention...=)
And yes!! On a dry floor with my attachment I only slipped 5 cm. But the truth Is, I
didn´t look for this. I was searching for more stability, not more grip to the floor. I practically didn´t slip. I even tried this several times with the same response. I even tripped forward (because of inercia)... I tried to learn a bit more about the subject, and everybody seems to agree that the size or the area in the slipping action doesn´t matter ( a physics thing). The materials could some how change the the friction between both parts, but wood should slip a lot more than a rubber sole. And what happend with water?
20 cms!!! It´s like 6 times less... I´m not sure, after seeing several sliping videos on youtube. One of the first things that happens when slipping is that the front part of the shoe tends to go up. I believe that even if it´s just a little bit, your not in contact with the ground any more, and that that Is why one slips and falls. It all happens to fast. My pursuit of balance gave me more grasp to the ground (sounds kind of yoga).
And it works as a ready to go tuffet too. A walked a couple of hours with these on. They were ok. No problmes after a while I started to feel the screws ( that screwed the sneakers to the sole) on my heels and I had to take them off. The good part though, Is that I never fell.