those searspringers are really cool !
I may attempt to replicate them myself
looks like the hardest part would be getting springs of the proper strength
Some great ideas in this thread. That Majestic Ball Bearing Spring Fork Attachment looks so simple. And it gives me some ideas for some interesting variations.
Ah yes, - during the solid tyred safety bicycle era many many patents were filed for suspension systems. There is truly nothing new under the sun and more than likely the trick full suspension system on the flashy MTB in the shops was already thought of before back at the end of the 19th Century.