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Abstract
The paper describes a novel method of securing extremely rapid advance of the film in a camera designed for single shot “on command” operation. The film is drawn through the film gate by means of compressed air which forms a loop of pre-determined size on the far side of the gate. The inertia of the moving parts of the system is very low and the overall resetting time for the mechanism is only 35 msec.
The rapid advance mechanism has been installed in a camera for spark chamber photography at an accelerator. Initial tests have been made (taking more than 500,000 pictures) which show the performance to be satisfactory.