This is a pretty fun, and informative little history of the espresso machine, from the very first patent.
“Though there were surely innumerable patents and prototypes, the invention of the machine and the method that would lead to espresso is usually attributed to Angelo Moriondo of Turin, Italy, who was granted a patent in 1884 for “new steam machinery for the economic and instantaneous confection of coffee beverage.” The machine consisted of a large boiler, heated to 1.5 bars of pressure, that pushed water through a large bed of coffee grounds on demand, with a second boiler producing steam that would flash the bed of coffee and complete the brew. Though Moriondo’s invention was the first coffee machine to use both water and steam, it was purely a bulk brewer created for the Turin General Exposition. Not much more is known about Moriondo, due in large part to what we might think of today as a branding failure. There were never any “Moriondo” machines, there are no verifiable machines still in existence, and there aren’t even photographs of his work. With the exception of his patent, Moriondo has been largely lost to history.”