[modeleng] Re: Fw: More on screwcutting

It is even worse than you think. A little Google finds that US Patent 328707
(issued in 1885) covers a swinging tool holder for threading! His design
doesn't lock the swinging holder but instead relies on the cutting force to
keep it properly bedded.

> -----Original Message-----
> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> On Behalf Of Shep
> Sent: Sunday, November 25, 2007 10:32 AM
> To: modeleng@xxxxxxxxxxxxx
> Subject: [modeleng] Re: Fw: More on screwcutting
> 
> Goodness me!
> 
> And I thought that this was an original idea which had occurred to me!
> Nothing new under the sun....!
> 
> Cheers!   Hubert
> 
> ----- Original Message -----
> From: "Patrick Coppens" <develop@xxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Sunday, November 25, 2007 3:01 PM
> Subject: [modeleng] Re: Fw: More on screwcutting
> 
> 
> > Shep wrote:
> >> Ken Strauss asked me how I intended to secure the suggested hinge
> method
> >> outlined below.   As I said, this is only a proposal - I have never
> made
> >> one, or indeed, seen one.
> >> My first reaction is to have a tapered pin with a knurled head to
> secure
> >> it in the closed position, or perhaps a hinged clamp.
> >> Has anyone seen this idea in practice?   What do you chaps think?   It
> >> has the merit of easy construction and use.
> >>
> >> Cheers!   Hubert
> >>
> >> ----- Original Message -----
> >> From: Shep
> >> To: Modeleng
> >> Sent: Sunday, November 25, 2007 11:11 AM
> >> Subject: More on screwcutting
> >>
> >>
> >> Hi everyone
> >>
> >> I have had several requests for pictures of the device I made for my
> >> ex-Emco lathe, to facilitate the withdrawal of the tool, when reversing
> >> to the beginning of the thread.   I have sent these pictures directly
> by
> >> email.    This system is a lot quicker and easier to make, than the
> more
> >> elegant series of retracting devices.
> >>
> >> An even more basic device, which I have not made, but which should
> >> work,certainly on the finer threads, is to hinge the cradle of the
> >> cutting tool, and swing this upwards to clear the thread on reversing.
> >>
> >> Cheers!   Hubert
> >> MODEL ENGINEERING DISCUSSION LIST.
> >>
> >> To UNSUBSCRIBE from this list, send a blank email to,
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> >> line.
> >>
> >>
> >>
> > Hubert/Ken
> >
> > have a look here, for ideas....
> > http://www.hemingwaykits.com/acatalog/Swing_Tool_Post.html
> >
> > This has some good drawings, on how to make such a tool post
> >
> > Patrick
> > MODEL ENGINEERING DISCUSSION LIST.
> >
> > To UNSUBSCRIBE from this list, send a blank email to,
> > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the
> subject
> > line.
> 
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