- rolamite
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☆ rolamite [rō′lə mīt΄ ]n.〚arbitrary coinage based on ROLL〛an almost frictionless bearing consisting of two or more rollers on a flexible metal band, that serves as a suspension system in various devices, as switches, valves, pumps, etc.
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ro·la·mite (rōʹlə-mīt')
When rotated as indicated in the top illustration, the rollers and metal strip will move to the right.
Precision Graphics
n.
A mechanism consisting of two or more hard cylindrical rollers with a flexible nonstretching band looped around them, so that the rollers move against each other with very little friction.[roll + -amite, of unknown origin.]* * *
mechanical roller-band device that functions as an almost frictionless suspension system for rollers; it consists of a flexible metal band formed in an S-shaped loop. In the Figure—>, rollers A and B are suspended within the loops of the flexible metallic band C, fastened at D and E to the parallel guide rails F and G. The sum of the roller diameters and twice the band thickness is greater than the distance between the guide rails, so that when the band is pulled taut and anchored to the guide rails at D and E, the band is wrapped around the rollers so tightly that slippage is prevented. If the guide rails in the figure were tilted clockwise slightly, roller A would rotate counterclockwise and roll out the band on the upper guide rail to some position such as A′, and roller B would rotate clockwise and roll in the band on the lower guide rail to position B′. The frictional forces restraining the motion of the rollers would be about one-tenth the friction for ball and roller bearings.The Rolamite was invented in 1966 by the U.S. engineer Donald F. Wilkes, who gave it its name.* * *
Universalium. 2010.
