"Larry Blanchard" wrote in message
...
On Mon, 09 Aug 2010 11:30:43 -0500, Leon wrote:

Can't agree, that technology had been around for many years. I have
lamps in my house that turn off when touched, building elevator buttons
that select by touch, and my I-phone needs the touch of skin, not a
stylus or finger nail to work.

But none of those are spinning rapidly :-). And aren't some of them
pressure-sensitive rather than touch-sensitive?



Lets take all of what was in my post,

The claim to fame for SawStop is Not stopping the blade, but Sensing when
your pinkie finger touched the blade and Then stopping the blade before
you lose said pinkie.

Can't agree, that technology had been around for many years. I have lamps
in my house that turn off when touched, building elevator buttons that
select by touch, and my I-phone needs the touch of skin, not a stylus or
finger nail to work.


Getting a blade spinning in excess of 3000 rpm to stop in a small fraction
of a turn and drop below the table surface is the tricky part.





I was refering to how the switch touch technology regardless of application
has been around a long time. In fact some times a static charge in your
finger is enough to operate the switch with out actually touching the
switch. Not to be confused with touch screens that require pressure as you
mentioned, GPS screens typically needs the pressure.