Re: ATM Ball-and-Socket flotation for mirror cell

[Edwin Spector <ems@lucent.com>]

From: don clement <donald_clement@yahoo.com>
<<
An alternative to using Teflon ball and socket could
be to use a solid machined compliant (flexural pivot)
universal joint. The compliant universal joint would
be simple to make: mill a solid shaft such that there
are two thin rectangular sections at right angles to
each other. [...] >>

I used a simpler system - a single nylon screw. It allows a few degrees of
flexing, but is stiff enough not to shear. Screw is 6mm (1/4 in).

       |nut|
---------------------
////////| |//////////  plywood (supporting mirror)
---------------------
       |nut|
        | |  exposed bit of screw
       |nut|
---------------------
////////| |/////////  plywood (fixed)
---------------------

Edwin
Bath, UK.