Re: [CAD_CAM_EDM_DRO] E-STOP SWITCH

Jan R and all who resopnded... many thanks.

Robert Williams

----- Original Message -----
From: <JanRwl@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, December 08, 2002 7:06 PM
Subject: Re: [CAD_CAM_EDM_DRO] E-STOP SWITCH


> In a message dated 12/8/2002 7:35:25 PM Central Standard Time,
> rob.will@... writes:
>
>
> > I think I understand what normally open and normally closed means, but
can't
> > guess what momentary means, will someone please explain "momentary"?
>
> A door-bell button is a "momentary" switch. It CONTACTS only during the
> MOMENT it is actually pressed, NOT "stays closed" like a LIGHT-SWITCH
turned
> on.
>
> The "normally-[something" switches are "Spring-returned", that is, they
> "spring back" to their respective "normal" positions when the fat finger
> depressing their lever or button is removed. "Normally OPEN" means simply
> NOT "ON", normally, and "Normally CLOSED" means simply "normally ON" when
> not pressed. The "push-button" your refrigerator-door pushes is a
"normally
> CLOSED" switch. When you open the door, that can "spring back" to its
> "normal" position, so the light goes ON. That is, when PRESSED, this
switch
> turns OFF the light. OK? Jan R.
>
>
> [Non-text portions of this message have been removed]
>
>
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