Signedon front: Technicolor
on plaque on top of machine: Ealing / film-loops (TM) / FOR USE IN THIS PROJECTOR ARE AVAILABLE FROM: / EALING FILM LOOPS 2225 MASSACHUSETTS AVENUE, CAMBRIDGE, MASS. 02140, U.S.A.
Inscribedraised lettering above silver knob in back: ELEVATION
on plaque behind large metal switch in back: BRILLIANCE CONTROL / SUPER BRIGHT / NORMAL (Lamp saver) / DCF LAMP ONLY
Pat. No. 3,139,789, 3,206,757
FunctionAccording to the 1964 patent mentioned in the description field: "This invention relates to a motion picture projector and film cartridge wherein the cartridge contains a continuous loop roll of film and the projector receives the cartridge for optically projecting the film.
The present common form of motion picture projector and in particular portable projectors for use with 8 or 16 mm. film, require a supply reel with the roll of film to be shown and a take-up reel on which the film is wound as it is being shown. The film must be threaded through various sprockets and aperture or pressure plates before the picture projection can be started. Further, after the complete roll of film has been shown, the end must be attached to the original reel and rewound thereon from the take-up reel.
Both the period of time required to thread the film through the projector and the time required to rewind the film on to the original roll may be objectionable or annoying in many situations. The threading of the film through the sprockets and plates require a certain amount of skill and knowledge and therefore is not easily accomplished by one not familiar with movie projectors. As the use of motion picture film becomes more popular in the home, school and industry, it becomes important that the skill and knowledge required to operate projectors be minimized so as to permit their use by inexperienced persons."