RE- panic button
Subject: RE- panic button
Date: Mon, 09 Jun 1997 12:57:00 GMT
From: robert.michaels-at-online.sme-dot-org (Robert Michaels)
Organization: Society of Manufacturing Engineers
T> From: "William Noble" <William_B_Noble-at-msn-dot-com>
T>there is a switch made for use on jacuzzis where shock hazard is
T>significant. The switch is pneumatic - there is a button that you
T>near the jacuzzi, and then a 1/4 inch plastic hose (like aquarium air
T>that runs to the pump controls. pressing the button starts/stops the
[ ... ]
There's one thing about your idea which I completely dis-
I wasn't the one who thought of it!
My only concerns in implementing it are whether the pneumatic
button must pushed =hard= to send a proper air pulse
to the controller; also how much of a delay there might be
between the button-push and the controller's reaction.
With an electrical E-Stop push button, only a
delicate touch is necessary to break the normally-
closed contacts. The signal, of course, is sent
with electric speed.
Pushing on, in --