Switchable Bee Escape
I have seen this one in the Thomas catalogue. But
the picture was small and indistinct.
I will pursue better illustrations and detailed drawings.
It is intended for installation in a board such that the
operating plunger protrudes through the rim of the board itself. This
gives two way traffic with the plunger pulled out and one way action
when in the fully inwards position.
To date I have not seen or handled an actual example.
Written... May 2001
Revised... 05 April 2002