It took a while to sort out that the C in a "not-quite" diamond is the Cleveland Twist Drill and I had to wonder what could patentable on such a simple device? I discovered the 1951 patent 2,542,368 which suggests that the thickened portion (#4 on the drawing) is the improvement.
4 comments:
I read the patent through a couple of times but I just don't have enough experience driving tooling out of spindles to understand what his claim is. Maybe (?) his is the first tapered drift pin?
He makes it sound like people are getting beaned on the head by tooling everyday but I don't think that was the case.
Put any Morse drift key in the slot and whup it with a hammer to seat it firmly. After a few whuppings, the whupped end will be much like the Cleveland product.
--rats
As I understand it, they are just making a bigger target to whup.
I think the U.S. patent office grants patents far too readily, as long as the application is submitted by a verbouis patent attorney.
You may be aware that someone was granted a U.S. patent for a branched stick for throwing for a dog to retrieve - Animal Toy #636693 - by using plenty of legal verbage.
Jack from Illinois
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