RE- panic button

To: tesla-at-poodle.pupman-dot-com
Subject: RE- panic button
From: Tesla List <tesla-at-stic-dot-net>
Date: Mon, 09 Jun 1997 21:35:07 -0500
Approved: tesla-at-stic-dot-net

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
         To:  tesla-at-pupman-dot-com


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
pretty
T>significant.  The switch is pneumatic - there is a button that you
T>install
T>near the jacuzzi, and then a 1/4 inch plastic hose (like aquarium air
T>line)
T>that runs to the pump controls.  pressing the button starts/stops the
T>blowers

 [ ... ]

        There's one thing about your idea which I completely dis-
        like:

                   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 --
                                        Detroit, USA

                                        Robert Michaels