by George Collins » Wed Nov 28, 2012 7:25 pm
I can see where there exists similarities however, the vise referred to pinches an item in the superior aspect of the two vertical boards. The way it works is that the two upright boards are affixed to the lateral aspects of the base and ascend through a common hole made into the board one sits on. When the user rests his body weight on the superior horizontal board, the two upright boards a forced together. This translates the vertical force of the weight of the user to opposing horizontal forces multiplied by the length of the lever arm.
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