Kinetoscope

Muybridge and Edison met at Edison's laboratory in West Orange; Muybridge later described how he proposed a collaboration to join his device with the Edison phonograph—a combination system that would play sound and images concurrently.
The kinetoscope was a device that conveyed a strip of perforated film which had images on them over a light source with a high speed shutter on it, the images where then projected through a window on the cabinet the components were housed in, it was designed for films to be watched individually.

First described in conceptual terms by U.S. inventor Thomas Edison in 1888, it was largely developed by his employee William Kennedy Laurie Dickson between 1889 and 1892.
The name kinetoscope is derived from the Greek roots kineto- ("movement") and scopos ("to view").
Edison assigned Dickson, one of his most talented employees, to the job of making the kinetoscope a reality. Edison would take full credit for the invention.
This meant that Edison didn't play the biggest role in creating the kinetoscope but still took full credit in the creation of it, this lead to most modern scholars to assign Dickson with the major credit for turning the concept into a practical reality.