From: [email-masked]
Date: Mon, 19 Feb 1996 21:17:38 -0500

ing building a trip hammer - there was a hammer originally made in
England called a Blacker which was a motorized treadle hammer, i.e., could be
used as either manual or trip hammer.  It used a large anvil as a striking
surface and could be rolled out of the way when not in use.  One of the old
Anvil's Ring magazines has the patent diagrams reproduced that might be of
help.  Bill Gichner also had one for sale many months ago and might be able
to shed light.  Good luck.