Name for type of toggle sw. that is Mom. Off On?

[Dave Boland]

I have been looking for a small toggle switch for a test box
that is momentary on, off, and on, but can't find one and
don't know if there is a special name for these switches. I
have seen them, but of course can't find them when needed
(yea, what else is knew!). Any help will be appreciated.

Electrically, this switch is like a momentary switch in
parallel with a regular on/off toggle switch. This is one
option, but more work also.

____|____
| |
---------
M Off On


Dave,

 

[Mark A. Odell]

Dave Boland <NODARNSPAMdboland9@stny.rr.com> wrote in
news:RBywe.64041$g5.7845@twister.nyroc.rr.com:

I have been looking for a small toggle switch for a test box
that is momentary on, off, and on, but can't find one and
don't know if there is a special name for these switches. I
have seen them, but of course can't find them when needed
(yea, what else is knew!). Any help will be appreciated.

Electrically, this switch is like a momentary switch in
parallel with a regular on/off toggle switch. This is one
option, but more work also.

____|____
| |
---------
M Off On

Do you mean "normally open momentary" where "off" means the switch is open
an thus passes no current? I would be surprised if www.digikey.com didn't
have them.

--
- Mark

 

[John Fields]

On Wed, 29 Jun 2005 14:53:37 GMT, Dave Boland
<NODARNSPAMdboland9@stny.rr.com> wrote:

I have been looking for a small toggle switch for a test box
that is momentary on, off, and on, but can't find one and
don't know if there is a special name for these switches. I
have seen them, but of course can't find them when needed
(yea, what else is knew!). Any help will be appreciated.

Electrically, this switch is like a momentary switch in
parallel with a regular on/off toggle switch. This is one
option, but more work also.

____|____
| |
---------
M Off On

---
They're called (are you ready???)

"On - Off - Momentary" toggle switches

http://dkc3.digikey.com/PDF/T052/1207-1211.pdf
--
John Fields
Professional Circuit Designer

 

[Ken Moffett]

Dave Boland <NODARNSPAMdboland9@stny.rr.com> wrote in news:RBywe.64041
$g5.7845@twister.nyroc.rr.com:

I have been looking for a small toggle switch for a test box
that is momentary on, off, and on, but can't find one and
don't know if there is a special name for these switches. I
have seen them, but of course can't find them when needed
(yea, what else is knew!). Any help will be appreciated.

Electrically, this switch is like a momentary switch in
parallel with a regular on/off toggle switch. This is one
option, but more work also.

____|____
| |
---------
M Off On


Dave,

In major electronics catalogs they are usually designated as:

ON-OFF-(ON)

The parinthesies indicates momentary.

But sometimes:

ON-OFF-MOM.

I just went though search for a ON-NONE-(ON), and got a ON-OFF-(ON) by
mistake. Typed in the wrong part number from Mouser. So, I know they have
them.

 

[Neil Kurzman]

Ken Moffett wrote:

Dave Boland <NODARNSPAMdboland9@stny.rr.com> wrote in news:RBywe.64041
$g5.7845@twister.nyroc.rr.com:

I have been looking for a small toggle switch for a test box
that is momentary on, off, and on, but can't find one and
don't know if there is a special name for these switches. I
have seen them, but of course can't find them when needed
(yea, what else is knew!). Any help will be appreciated.

Electrically, this switch is like a momentary switch in
parallel with a regular on/off toggle switch. This is one
option, but more work also.

____|____
| |
---------
M Off On


Dave,


In major electronics catalogs they are usually designated as:

ON-OFF-(ON)

The parinthesies indicates momentary.

But sometimes:

ON-OFF-MOM.

I just went though search for a ON-NONE-(ON), and got a ON-OFF-(ON) by
mistake. Typed in the wrong part number from Mouser. So, I know they have
them.

Digikey has them also.
ALCO, C&K and others