Renseignements généraux

Nº de série

S/O

Nº de partie

5

Nombre total de parties

7

Ou

S/O

Brevets

S/O

Description générale

Metal shutter body with wood casing on the outside

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

S/O

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Photographie

Catégorie

Ciné-divers

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

Used with Motiograph projector, which was used1939-1970

Canada

Used in the Canadian pavilion at the 1939 World's Fair in New York and then moved to Rideau Hall (info. from Jim Mitchell, Ottawa, July 31, 1990). The World's fair in Paris in 1925 revolutionised the art and design world by introducing the Art Modern style, the design patent (US D111602) draws inspiration from this movement and truly represents the feel of the late 1920's and the 1930's.

Fonction

Used in a system to isolate the projection booth in the event of a fire.

Technique

The Enterprise Optical Company of Chicago, founded by Alvah C. Roebuck, was responsible for many motion picture projector innovations, one of which was the Motiograph projector. Enterprise Optical changed names in 1936 to Motiograph. The first projector released in 1938 was the Motiograph model K that included double bearings, a one-piece shutter that was moved between the light source and the film - allowing less heat to be transferred to the film, and a faster framing device. The purpose of the shutter was to create a better illusion of motion between the frames, improving the mechanism of the shutter reduced flickering. Because of an agreement with Electrical Research Products Inc., a Western Electric subsidiary, Motiograph was able to change the sound system in the Model K to the Mirrophonic patent held by Western Electric. The Model K was the last projector produced by Motiograph prior to WW2. The arc lamp, manufactured by the Brenkert Light production Company of Detroit, Michigan, seems to incorporate three patents issued between 1937 and 1941. These patents are for the design (US D111602), the lamp (US 2241179 - filed in 1938), and the ventilating system (US 2101668). The second patent dealt with improvements to the lamp door allowing it to open fully while using less space in the projection booth. The Third patent (the only patent actually found on the artefact) creates a better ventilation system for arc lamps while removing the ash but not extinguishing the low amperage arc. This coupled with the Motiograph's improved rear shutter allowed for increased heat dissipation and lessened the risk of warping or melting the film.

Notes sur la région

Inconnu

Détails

Marques

None apparent

Manque

Appears complete

Fini

Grey metal frame with brown, unfinished wood casing.

Décoration

S/O