[GreenKeys] Turn & Pull Twist-Lock power plug (LPR, LPW)

[Nick England]

>From an old email I squirreled away. Worth checking out.
“1-1/8" dia and also has a center ground pin. Possibly NEMA ML-3R, Hubbell
HBL7484”

I pick up those things whenever I see one at a hamfest. Not sure if I
currently have a spare but let me know if you don’t have any luck
elsewhere.
Nick


On Sun, Feb 18, 2018 at 8:42 PM Ethan Blanton <elb at kb8ojh.net> wrote:

> Hi all,
>
> I'm looking for a plug that I suspect is unobtanium, but as I don't
> see a lot of discussion in the archive, I'm hoping maybe I'm wrong.
>
> Both my LPR (M28 reperforator) and LPW (M28 paper winder) have a male
> twist-lock style power connector with a central ground pin and two
> diametrically opposed power blades.  I have attached photos of the LPW
> line plug with a NEMA 15 beside it for comparison, as well as the LPR
> chassis mount plug.
>
> What I'd like to find is the mating line receptacle (that would plug
> into either one of these on the end of an extension).  I cannot find a
> Teletype part number for this plug.  Both the LPR and LPW parts lists
> have a part 114466, but the drawing shows only two pins and the
> description is "Connector, Receptacle (2 Pt)", which leads me to
> believe that this is a (perhaps older?) part without the central
> ground pin.
>
> I see a mention in the archive of Arrow-Hart being the manufacturer of
> "Turn & Pull" plugs in another context, but A-H seems to now be owned
> by Cooper and their "Turn & Pull" products are NEMA standard
> twist-lock plugs.  It's not clear to me if this is the right parts
> line or not, but I cannot find even a vintage plug that looks right.
>
> So ... am I out of luck, or does someone know where to find one of
> these?  I'd like to cable the LPW to my KSR using this plug, at the
> very least, and ideally I'd plug one into the LPR as well.  The LPW
> cord was shot, so I can put a NEMA plug on it if I have to, but ...
>
> Ethan
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-- 
Nick England K4NYW
www.navy-radio.com
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