"NT" wrote in message
...
On Aug 19, 6:36 pm, Donwill wrote:
I'm not sure what it's called but I will try and describe it's
description & function .

A standard approx 85mm square white plastic surround, to screw into a
standard wall box.
Has a 3 position switch, centre off, momentary action, what I would
call "press to make, release to break".
Press up to make a contact, press down to make another contact. (change
over) Spring release to centre off position.
Or possibly two buttons mechanicaly connected.
This is required to manualy open and close a motorised vent.

It's difficult to search without a name for this type of switch.
Cheers
Don

centre off, momentary action. I'm doubtful you'll find them in
standard domestic accessory style though.


NT

Try finding the type of switch used to lower projection (home cinema
screens) Try an Audio Video installer

http://ezinearticles.com/?How-to-Cho...tch&id=2627696