In article ,
says...
--Can anyone put a name to this contraption? It's probably got a
nautical origin, but I don't have a clue what it, or its ilk might be
called. First three photos on this page:
http://www.nmpproducts.com/artcar0508.htm
--I'm thinking these things made smaller would be ideal for
robotic applications...



The only other place I've seen one of those is in McMaster-
Carr. They call them "Gear Universal Joints", on p.957.

Ned Simmons