Secret Answer:     a Satellite Roller Screw!

Application:  a Live Theater Stage.



For quite a number of years, actors and actresses, opera singers and orchestra instrumentists have been 
requesting and requiring silent stage and set displacements. 

Acme thread screws required tremendous amounts of energy, Hydraulic cylinders hissed at the wrong time 
and ball screws squeaked.

Theater and music hall architects became aware of the roller screw. 


The Satellite Roller screw is the muscle of choice of Thespis, Melpomena and Erato.