Methods Used
The intermittent mechanism must be employed in concert with a rotating shutter which blocks light transmittance during the motion of the film and allows light through while the film is held in place usually by one or more registration pins. The intermittent mechanism can accomplished in many ways, but most often, it is done with sprocket wheels, claws, or pins coupled to the camera or projector drive mechanism.
In movie theater projectors, the intermittent movement is often produced by a Maltese cross mechanism.
However, in a movie camera, it is done through a process by which a shutter opens exposing the film negative to light for a split second (the standard for regular motion in North America is 1/48 of a second), then the shutter closes blocking light from reaching the negative. Once the shutter is completely closed, a claw pulls down the next frame of negative film by the sprocket holes into the film gate and the process begins again. A movie projector works in a similar way.
Read more about this topic: Intermittent Mechanism
Famous quotes containing the word methods:
“We can best help you to prevent war not by repeating your words and following your methods but by finding new words and creating new methods.”
—Virginia Woolf (1882–1941)
“There are souls that are incurable and lost to the rest of society. Deprive them of one means of folly, they will invent ten thousand others. They will create subtler, wilder methods, methods that are absolutely DESPERATE. Nature herself is fundamentally antisocial, it is only by a usurpation of powers that the organized body of society opposes the natural inclination of humanity.”
—Antonin Artaud (1896–1948)