Patent number: 839535
Filing date: Mar 22, 1906
Issue date: 1906

The "disappearing sight" in the words of Aubrey, for brush shooting.
http://www.google.com/patents?id=E2lJAAAAEBAJ&printsec=description&zoom=4

Scroll down for all of Aubrey's patents:
http://damascus-barrels.com/Aubrey.html

There were additional patents held by Meriden Firearms Co.

Kutter, contact me at aubrey@damascus-barrels.com

Pete