The topic intermittent is discussed in the following articles:

use in motion-picture cameras

  • TITLE: history of the motion picture
    SECTION: Edison and the Lumière brothers
  • TITLE: motion-picture technology
    SECTION: Principal parts
    The intermittent is usually a claw-type mechanism, sometimes a “dual-fork” claw that pulls down four sprocket holes at a time. The fork protrudes and recedes to engage the sprocket holes. Some cameras are equipped with pin-registering mechanisms, which hold the film firmly in place in the exposure gate, with the pins engaging sprocket holes.