[Shop-talk] drilling a square hole

Jimmie Mayfield mayfield+shoptalk at sackheads.org
Tue Oct 18 14:09:40 MDT 2011


On Tue, Oct 18, 2011 at 12:08:08PM -0400, David Hillman wrote:
> On Tue, 18 Oct 2011, john niolon wrote:
>    It's actually based on a 1918 patent... an American one.  HJ Watts 
> patent #1,241,176.

When I was a kid, I saw a replica in action at a Ripley's 'Believe It 
Or Not' museum.  


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