Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 70
inder C terminating at one end in a smallhand-lever fits the hole loosely. When a film is to be mounted,the slot in the cylinder is turned to coincide with that in the drum-rim and the end of the film is inserted into the channel formedby the lined-up slots. The drum is then rotated by hand,… … Relation of film clamping device to camera drum. protrude from the lower end of the slot. Fig. 4 shows thesituation at this point. A turn is then given the hand-leverwhich puts the film under tension on the drum and simultaneouslylocks it in place. Fig. 5 shows the film position after this…
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