US Patent 909,568 · 12 Jan 1909

Round door with explosion chambers

by Sumner A. Ely

Patent drawing in section of a thick round safe door with chambers, lock and bolts
Hover to magnify · click for full screen
Sumner A. Ely's safe door, US patent 909,568 of 1909, sheet 1. Public domain, via Google Patents.

DownloadSave to Pinterest

Same maker or decade

1903 Fire and water proof safe door

1905 Rotary-door manganese steel safe

1906 Fire-resisting cabinet

1906 Self-locking bolt work for express boxes

1908 Shield over the screw-door joint

← 1908 Shield over the screw-door joint All patents 1910 Wall safe →