Has anyone seen this lock or it’s maker before?

[Carlking]

This lock has been in the collection for a good while. I just recently decided to do a little research.

I am reasonably certain it is this US patent 118473 issued on August 29, 1871. This date is different from the date on the padlock. The date on the lock is not a Tuesday so it is likely a mistake, or for a patent issued in another country besides the United States.

The patent indicates the inventor lived in Jerome, Westchester County, New York. A search of the internet revealed that the Jerome area was annexed by Bronx, New York in 1874. That likely refers to Bronx County, since the city, “the Bronx”, wasn’t formed until much later. Apparently the county lines moved around back then. The only evidence remaining is “Jerome Ave”, a major thoroughfare in the Bronx. Found no evidence of a city named “Jerome”.

Another problem with the patent is the inventor's name. It is shown as “Hermon Nelsen”, however when you look at the signature; it appears to be spelled “Herman”. In the index, the name is listed as “Nelson”, (more confusion.)

All of these inconsistencies may be contributing to my inability to find any information about this maker. Would anyone else like to give it a shot? I am looking for this guy’s possible connection to other lock makers from this area of New York.

The key post being in the center of the case is one of the design features mentioned in the description.