The Mutoscope was an early motion picture device, patented by Herman Casler on November 21, 1894. Like Thomas Edison's Kinetoscope it did not project on a screen, and provided viewing to only one person at a time. Cheaper and simpler than the Kinetoscope, the system—marketed by the American Mutoscope Company (later the American Mutoscope and Biograph Company)—quickly dominated the coin-in-the-slot "peep-show" business.
Read more about Mutoscope: Operation, Manufacture, Usage, Public Response