Thanks, John. I did some on-line research after posting the images, and the
information I found confirms what you say. The closed screw box that this
one has was an English development, and makes use of an enclosed, well
greased, Acme square thread. My guess is that this one has been in use
since the mid-1800s.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "JOHN DUGGAN" <john.duggan10@xxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2011 5:30 PM
Subject: Re: [OM] IMG: Another Relic From the Past
> Jim, The blacksmith's leg vice is made from forgings,and is usually made
> in wrought iron. This gives it the toughness needed to absorb the shocks
> involved in hammering metal. Ordinary fitters bench vices are usually
> manufactured in cast iron. Whilst these are fit for their intended
> purpose, if they are subjected to a shock load, or overtightened by using
> an extension tube on the tommy bar, they can fracture across the neck of
> the moveable jaw.
>
> Regards
>
> John Duggan,
>
> Wales, UK
>
> --- On Wed, 12/10/11, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:
>
> From: Jim Nichols <jhnichols@xxxxxxxxxxxxx>
> Subject: [OM] IMG: Another Relic From the Past
> To: "LUG@xxxxxxxxxxxxxxx" <lug@xxxxxxxxxxxxxxx>
> Cc: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Date: Wednesday, 12 October, 2011, 19:37
>
> Attached to the end of my cluttered workbench is a post vise that goes
> back at least three generations in my family. I first recall seeing it as
> a part of an outdoor blacksmith shop on our farm, in the 1930s, under a
> large sweet gum tree, where plows were sharpened and general repairs were
> accomplished. I suspect it dates back to my great-grandfather, but can't
> confirm this.
>
> The post vise mounts to the bench and is supported by an iron post, in my
> case anchored by an oak log:
> http://gallery.leica-users.org/v/OldNick/Vise+78.jpg.html
>
> The vise is powered by an encased Acme screw thread:
> http://gallery.leica-users.org/v/OldNick/Vise+83.jpg.html
>
> Many of the parts appear to be crudely forged or stamped:
> http://gallery.leica-users.org/v/OldNick/Forging+Details+81.jpg.html
>
> Fuji Finepix F10, ISO 800, Flash
>
> Comments and critiques welcomed.
>
> Jim Nichols
> Tullahoma, TN USA
> --
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>
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