In the literature, the slider is generally attributed to one of two Georges (if not both): the aforementioned Blaeholder, and Uhle. In 1936, John J. Ward wrote a Baseball Magazine article about ...

A slider mechanism like this one is a mechanism that allows something to move in two directions. Here, the snake can slide left to right. Let’s take a look at how this slider is made.

It's worth checking out if you're just Impossible-curious. But if you're craving the One True Slider, skip the Impossible Slider and get a sackful of the old standby.