Does anyone have hex drive sockets that are the same OD at drive end and have a 1/2 round ring around the OD at top like ste one shown in the Pat # 1438900  dtd Dec 12 1922.  I would like at least one of each size  1/4 & 1/2 hex drive.   Chuck Garrett

Chuck,
I'm wondering if maybe this isn't just "artistic license" on the part of the inventor for the patent drawing. This would be a rather difficult and expensive way to make a socket. 

It would be easier to just add some material to the overall thickness if the idea was to gain additional strength.

Have you seen any like this?

Mike

>It would be easier to just add some material

Unless you are making it on a screw machine...
Then it is just material you don't have to remove...

I know they exist but not sure whether 1/4 0r 1/2  hex drive.  I think maybe 1/4 drive as they are listed as 5/16 thru 1/2 size.  At least 2 catalogs list them in the 20s I think.

There are oddball drive sizes used for hex besides 1/4 and 1/2, like 5/16....