[TheForge] Re: Period power hammer? oliver hammer plans

[Peter Hirst]

Great pix, Mike.  Thanks   it looks pretty close to the one Ben Barret 
linked to on Youtube (http://www.youtube.com/watch?v=nLIbObCltfQ.

Certainly close enough for my period repro requirements.  A couple 
questions, if you know.  First, I can't quite see the return spring, but it 
looks like its hooked to a lever off the main axel to the smiths left and 
behind the hammer mount.  I wonder if its adjustable for different weight 
hammers.  In the film, it looks like the smith has a return stop on the 
treadle that holds the hammer at about 45 degrees from vertical while 
working, then releases to let the hammer swing up and out of the way.  the 
control for this stop appears to be mounted on the right side of the anvil 
block, and may be variable to control the strength of the hammer blow.

The oliver in the film also seems to be attached to the anvil by a shaft 
passing through the anvil and holding the bick where the weld is finished at 
the near edge.  (I wonder if this hole can be added to an anvil)

The hardy tool is almost certainly used for the initial bend in the link: 
same size material as the chain.  The hammer head holds a top tool and 
appears to be used exclusively for finishing the weld.  The film shows the 
smith doing the weld itself soley with the had hammer, and the oliver hammer 
meeting the welded bend after the weld is stuck.

Thanks so much for these pics.  This appears to be  a good solution. 
Something I can build myself  to authentic period standards.  Mike:  do you 
have contact info for Jim?  I would like to get a few measurements and and 
maybe more detail pics if possible.

Peter



----- Original Message ----- 
From: "Mike Spencer" <mspencer at tallships.ca>
To: <theforge at mailman.qth.net>
Sent: Thursday, January 03, 2008 9:39 PM
Subject: [TheForge] Re: Period power hammer? oliver hammer plans


>
> A short time ago, lemme see.....Um that would have been in October of
> 1999 -- cringe -- Jim Friedrichsen sent me some photos of an oliver or
> chainmaker's hammer and I promised to put them on the web.  Sorry,
> Jim.
>
>
> Oy.  Well, I was reminded when the topic came up again.  Here they are:
>
>    http://home.tallships.ca/mspencer/oliver/oliver.html
>
> No blueprints or plans but you can see how, in principle, it was
> made.  Related are a couple of photos of an anvil set up for a
> (presumably) more primitive version of the same thing:
>
>    http://home.tallships.ca/mspencer/mystanvil.html
>
> - Mike
>
> -- 
> Michael Spencer                  Nova Scotia, Canada       .~.
>                                                           /V\
> mspencer at tallships.ca                                     /( )\
> http://home.tallships.ca/mspencer/                        ^^-^^
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