"Sprocket" Quotes from Famous Books
 ... A represents an outer light-tight box containing a lens, C, and the other necessary mechanism for making the photographic exposures, H and H being cases for holding reels of film before and after exposure, F the long, tape-like film, G a sprocket whose teeth engage in perforations on the edges of the film, such sprocket being adapted to be revolved with an intermittent or step-by-step movement by hand or by motor, and B a revolving shutter having an opening and connected by gears with G, and arranged ...
— Edison, His Life and Inventions • Frank Lewis Dyer and Thomas Commerford Martin |
