WirephotoIn 1935, Wirephoto™ by AP News® was invented. It enabled the transmission of photographs by wire to member newspapers. The photo was wrapped around a drum. The drum was then rotated as a light-sensitive photocell moved over the image picking up brightness differences. The photocell created voltages that were amplified and sent by telephone lines to the subscribing newspapers. At the receiving end, a piece of photographic paper spun around on a cylinder within a light-tight enclosure. The intensity of a pinpoint of light focused on the paper varied with the signal being picked up by the originating machine. The paper was then processed in a darkroom in the same way as a normal photographic print.* |
