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Harry Bloomfield[_3_]

was thinking very hard :
As part of re-wiring the workshop I want to be able to pull down a socket (on
a flex) from the ceiling when required and then to have it retract when not
needed. The action would be something like a roller blind: pull and let go to
latch down, pull again to unlatch and retract. The roller blind mechanisms
are quite long and fit in a tube whereas I need something that winds a
string.
What do I need?

Rod, or tube, with a socket mounted on the bottom end, hinge the rod at
the top and add a spring to pull it up out of the way. Add a cord to
pull it down when needed and arrange the spring tension, so the extra
weight of an item plugged in, is enough to keep the socket pulled down.

The socket would need to be wired in flex, and probably ought to plug
into a fixed high level socket.