le. noiselessness. On the higher speeds the blades are is narrowed, because the light rays suffer interfer- The shutter can be applied to any camera for any arrested without shock by an air-cushion, A, which is class of work. ence, so that serious speed limitations are imposed. controlled by the… … coiled around a spindle carrying at its outer end a bev- line is about 1,800 miles, and from Washington to The Operative Mechanism of the Multispeed Shutter. el gear meshing with the segmental rack of a driving- San Diego is about 2,400 miles. The matter has been ring d. The driving-ring travels on…
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