Below are some interesting facts regarding refrigeration using an icebox. Often times today we think of those in the 19th century of not having refrigeration. And in terms of what we have today, that's somewhat true. However, below I've listed a few facts to help us rethink what our ancestors might have been using in the 19th century.
A lawsuit: Alaska Refrigerator Co. v. Wisconsin Refrigerator Co. et al. (Circuit Court, AT. D. Illinois. July 13,1891.)
Dealt with a patent violation: Here's the facts. The original patent No. 8,463, reissued October 22, 1878 and originally issued July 24th, 1877.
In another lawsuit it states "The original letters patent were granted to Azel S. Lyman, as inventor, Mar. 25, 1856 and were extended for seven years from Mar. 25, 1879 and were reissued to Lyman, Dec. 26, 1871 ...
This notes that the ice box was patented as early as 1856.
According to Ellen Plante in her book "The American Kitchen." She states that iceboxes were available in 1860 but not widely used until 1880.
In 1864 we have reference to the Refrigerator (icebox) in "The American Home cook Book: with several hundred excellent recipes by American Lady ©1864.