Taking turns after a lecture
The Brooklyn Institute’s physics department met on 9 May 1893. Its head, George M. Hopkins, explained a new moving-image apparatus to members and guests. Scientific American’s report of 20 May says more than 400 attendees passed the machine after the explanation, each watching for about half a minute. In the film a blacksmith and two assistants first passed a bottle to drink, then took iron from a furnace and hammered alternately on an anvil.
The report’s title used Kinetograph, but its individual peephole machine is generally known as the Kinetoscope; Kinetograph primarily names the camera recording successive photographs. Some frames were first projected for the audience, followed by individual viewing of the moving sequence. The event combined a shared presentation of stills with a different arrangement for seeing motion.
From laboratory prototypes to a long-film system
Before the demonstration, Thomas Alva Edison had organized motion-image research at his West Orange laboratory in New Jersey. William Kennedy Laurie Dickson conducted major experiments, with William Heise contributing photographic and mechanical work. Visiting women’s-club representatives had seen a peephole prototype on 20 May 1891, before the developed Brooklyn presentation.
In 1892–1893 the team improved a vertically transported film system and built the studio later known as the Black Maria. Laboratory personnel played the roles in Blacksmith Scene, performing arranged actions for the film. The depiction of everyday work came from a staged studio scene.
References: [3]
Continuous film, illumination and a rotating shutter
Edison’s U.S. Patent 493,426, Apparatus for Exhibiting Photographs of Moving Objects, was filed on 24 August 1891 and granted on 14 March 1893. Its specification places images of successive moments on a flexible long strip, joined into a loop and wound around upper and lower rollers inside a box. A motor drives it, storing a longer sequence within a limited enclosure and allowing repeated passage through the viewing position.
A lamp beneath the film and a reflector direct light upward for a viewer looking through a lens and opening above. An aperture in a rotating shutter periodically admits light, revealing the successive images briefly. Film movement, illumination and shutter timing must work together to avoid a blurred streak. Heat-absorbing components also address protection of the film under strong illumination.
The camera records stages of action; the viewing machine presents them again in order. The patent includes optical variations and projection possibilities. Those possible configurations extend beyond what the Brooklyn event actually demonstrated.
References: [2]
Silent viewing and a later commercial opening
Scientific American describes synchronized sound and screen images as the goal of a complete apparatus. It also specifies that the individual viewing machine demonstrated that evening operated without accompanying speech or a phonograph. Hopkins explained apparent motion with earlier optical toys, while the audience watched changing photographed actions. Description of the current device appears alongside future aims.
Manufacture still encountered delays. The commercial Kinetoscope parlor at 1155 Broadway in New York opened on 14 April 1894. Paying to view machines individually connected films, apparatus and a business venue in a spatial arrangement different from later group projection. Brooklyn demonstrated watchability; commercial operation came in a subsequent stage.