I found this piece in a pile of scrap metal out for garbage the other day. I recognized it right away as a piece of line hardware. With a little seaching based on the patent date I was able to positively identify it as an actual example of patent 1351845 and attribute it to Lewin Benjamin Fish of AT&T. It has 3/4" threads and measures 17 1/2" inches in length although it appears that it may have been shortened.

[http://books.google.com/patents?id=PUdWAAAAEBAJ&dq=1351845]