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Brian-Gaff Brian-Gaff is offline
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Default Water and human proof bell push needed

Certainly the built in one in the intercom speaker/microphone box was
basically a little push switch f the kind found in old fashioned tape
recorders for record, mounted on a pcb which wads heat glued in the two
runners about half an inch long. The first failure mode was the pcb came
loose. This was duly araldited in, at which point the switch over traveled
and wedged on permanently.
It was then I migrated to the bell push with brass spring strips inside
that let the water in and it started to go green.


Actually, I have a nice bulk eraser here which is of no use with a very big
push button on, it. it will need perhaps a die cast box to put it in, and
see if that survives, but it would not win any prises for design elegance.
Brian

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From the Sofa of Brian Gaff Reply address is active
"Bod" wrote in message
...

Most bell pushes seem to still be of this type. I had no idea of the
stringent needs of a bell push in this environment before, so
wondered if
anyone else had any bright ideas?
Brian


I think it is an inherent property of bell pushes that the fail
quickly. I once built one using an industrial vandal resistant and
water proof push switch, which worked fine for years on machinery. As
a bell push, inside a porch, it stopped working after about two years.


I just don't believe that its not possible to do one that will last for
decades.

I remember that bell pushes used to be very reliable and rarely went
wrong.
Todays bell pushes are probably designed with built in obsolescence.