Greetings and Salutations.

On Mon, 22 Dec 2003 01:24:00 GMT, Loren Coe
wrote:

In article , Dave Mundt wrote:
Greetings and Salutations.

On Sun, 21 Dec 2003 22:13:08 GMT, jim wrote:

Andy Dingley wrote:
*snip*
about 6 months ago there was a show on tv that showed a new circular saw
that was being sold that the operator held a hot dog by the blade.. when
the blade hit the hot dog it quit and the electric brake went on and the
hot dog just had a little nick in it... unlike a finger that might have
... Oh yea...the lack of consumer appeal was proved by the fact
that although they DO "offer" the saws on their website
(www.sawstop.com), there is no evidence that any of these saws
exist or have been sold, in spite of being "available" for a year
or more. Regards Dave Mundt

so what _is_ the operative technology? the must be some part of it
that senses moisture, right? --Loren


According to the website, it injects an RF frequency into the
sawblade. This signal gets "damped" when skin touches the metal
blade. This dampening effect is sensed by the circuitry, which
then jams a rod into the blade to stop its rotate. I believe that
it also drops the blade below the surface of the saw, too...
It does need to be 'defeated' when cutting metal, of course.
I am unclear as to how the signal is kept off the REST of the saw,
so simply resting one's hand on the saw top would trigger it.
Regards
Dave Mundt