Why did thomas edison invent the movie camera

Edison and his assistant, WIlliam Dickson, grew worried that others were gaining around in camera development, such as Eadweard Muybridge. Muybridge presented the idea of collaborating to create a movie camera, but Edison turned him down. He planned to do this by using Edison's Phonograph and his Xoopraxiscope, a device for projecting motion pictures that pre-dated the flexible perforated film strip. Edison's Movie Camera, also known as the "Kinetograph" finally came together in 1891. The movie camera takes a sequence of photographs in order to give the illusion of motion when viewed in rapid succession.