Many of my hog ringers show Aug 1872 Hills patent 130853 of Decatur,IL
The double with Apr 27,1880 is patent 226915 by John Heesen
The one with the tack like thing is Hills hog marker.

 The 1931576 patent is by Dickie DE Neui as of Oct24,1933
The Nu-Way Automatic Hog Ringer is by Austin MFG Co of Round Grove <il

And the rings they need to draw blooood'
plus a close up of the Nu-way