McCree’s fire escape could roll and had a carriage that could be raised and lowered.
It was intended to be part of a building’s own fire prevention equipment and stored on location.
D. McCree improved on the fire-escape used in bigger buildings and created a portable wooden fire escape that could be attached to a home
McCree patented his portable fire escape on November 11, 1890 and it is the basis for models used today.
(U. S. Patent # 440,322 )