The recent thread for Old Precision Tools contained a couple of very useful links supplied by Leon F, thanks Leon.
I found a tool at a garage sale this summer and wasn't able to locate any info about it (even though I tried searches and Goog patents before), until I tried the links in Leon's reply to the other topic.
The Goog results allow everything to be viewed (PDF format), where the uspto site requires the installation of a downloaded viewer (I guess), and the datamp.org site didn't have any info about the tool onsite, but provided a link to the uspto site.
Kinda a neat old tool, patent filed 1939, and issued in 1941. I had made some comments about this tool in an older post, as I'd seen this tool at the same location at an earlier time, but didn't buy it then. When I saw it this year, I got it, and have just assumed that I wasn't going to be able to find any info regarding the age or exact intended use.
This is yet another instance of being grateful for the many metalworking-related topics that I enjoy finding, and learning from, in the RCM group.
WB ......... metalworking projects