[TheForge] Re: Chain & Treadle Video

Tue May 4 05:52:04 2004

I posted a scan of a typical tommy hammer from the Mushroom Green Chainshop
book to the photo site under anything else.
If I remember correctly there's no power in the shop other than the smith's
leg.
If I can find my copy of the tape maybe I can confirm my memory.

Tim Underwood
Sugar Hill Forge
[email protected]

> [Original Message]
> From: Don Sinclaire <[email protected]>
> To: <[email protected]>
> Date: 5/3/2004 10:55:08 PM
> Subject: [TheForge] Re: Chain & Treadle Video
>
> I looked at the chain making video about 200 times, repeating the same few
> frames over and over.  I don't think this is just a treadle hammer.  I am
> convinced there is power involved.  At first I thought it was foot
powered,
> then I began to think he was operating a clutch with his right hand, but
> that was not right either.
>
> The helve hammer has a yoke and a vertical rod extending up out of the
> picture, probably to a return spring to lift the hammer.  The helve also
has
> horizontal arm extending towards the camera. There is a vertical link,
about
> a foot long extending down from the end of that arm to what is probably a
> C-shaped piece which in turn continues down to the treadle via a slightly
> curved rod.
>
> The helve is normally up and out of the way until he steps on the treadle
> which pulls the hammer down to the working position.
>
> The C-shaped link hooks onto a rotating (powered) excentric.  His weight
on
> the treadle keeps the link following the excentric, operating the helve
and
> shakes his leg up-and-down.  What I thought was the clutch handle is
> actually his hand hammer handle--  He uses the hammer to keep the cam
> follower on the excentric.  Near the end you can see him raise the handle
> and start hand hammering the chain link with that hand hammer. 
>
> Most of this is my own interpretation of what I can make out of the video.
> Any other insights to this? 
>
>
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