Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 737
. has finished an exposure. When this happens the rollers D,Fig. 4, cease to feed the unexposed tape, but the rollers E andO continue to feed the exposed tape through the solutionsuntil all has passed through. The mechanism, shown enlargedin Fig. 3, serves to guide the tape into the storage space… … door—P, Fig. 4—which carries the cylindrical lens with itsaxis in a horizontal plane. The amount of light admitted to thelens is regulated by a horizontal aperture of variable width whichcan be opened or closed by a knurled screw Q, Figs. 2 and 4.The power necessary to drive the mechanism is…
Science · Technology · Meteorology · Patents
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