US Patent 166,107 · 1875

Fire-proof safe filling

by Theodore Hyatt

Patent drawing of a fire-proof safe in section, showing hollow walls and door packed with fire-resisting filling, T. Hyatt, No. 166,107, patented 27 July 1875
Hover to magnify · click for full screen
Theodore Hyatt's fire-proof safe, US patent 166,107 (1875): sections through the filled walls. The patent lists gypsum, Glauber's salts and asbestos among possible fillings. Public domain (via Google Patents).

DownloadSave to Pinterest

Same maker or decade

1872 Spherical safe with revolving door

1873 Crank-pin safe-door hinge

1873 Spherical burglar-proof safe

1876 Time attachment for locks

1877 Twin-movement time lock

← 1873 Spherical burglar-proof safe All patents 1876 Time attachment for locks →