Cinematograph projectors

Details Cinematograph projectors Cinematograph projectors

1974-06-21

1976-01-13

Hayes, Monroe H.

Optics: motion pictures

Gates

With curved film plane

352227, 352148, 352149, G03B 148

Patent

active

039320332

ABSTRACT:
A composite projector gate, aperture and light dowser assembly for a cinematograph film projector. The film guide surface through the gate area is curved convex towards the light source, film being held to curved marginal guides by flexible bands anchored before the gate, in the direction of film motion. A quick-release anchor is provided to retain the tension springs. The projection aperture comprises a removable plate in front of which, towards the light source, are spaced-apart heat screens with a horizontally-moving light-dowser blade therebetween in a space in which is provided forced air ventilation.

REFERENCES:
patent: 1812212 (1931-06-01), Meyer
patent: 1872353 (1932-08-01), Schulz
patent: 2461140 (1949-02-01), Capstaff
patent: 2506441 (1950-05-01), Charlin
patent: 3029687 (1962-04-01), Veit

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