On Thu, 19 Oct 2006 11:12:46 -0500, Mark Lloyd
wrote:

On Thu, 19 Oct 2006 14:07:14 GMT, "Pete C."
wrote:

Randy Day wrote:

I'm looking for an electrical coupling to provide 120VAC
to equipment on a rotating platform. The platform can
only turn one way, so it can't have wires up the hub.


They are called slip rings. There are a number of designs, but typically
it's a couple rings of brass with carbon brushes that press against them
to conduct the electricity. They are used on everything from tank
turrets to ferris wheels. Very similar to the commutator on a DC motor,
but the rings are not segmented and provide a continuous connection.

I have seen them in a device to keep a telephone handset cord from
getting tangled.
--

I can't say who makes them, but I've seen a cheap consumer slip ring
for lights used on rotating Christmas trees.

Beachcomber