There was a J.H. Blake of New York who produced a .30-40 krag rifle about this time.

There were at least 2 firearm related patents issued on May 12, 1891.
Torkelson 452126, related to hammer, linkage and spring.
Finch 452699, was trying to re-invent or at least patent the lever action.

Hopkins & Allen had a long run with Merwin, Hulbert & Co. Perhaps looking for new markets at this time.

Pete