Motography (Jan-Jun 1913)

228 MOTOGRAPHY Vol. IX, No. 7 E with the operating crank. The opening G in the retaining ring is directly below the pin C. By employing two pins instead of one, the star wheel may be made to turn one half revolution instead of one quarter per revolution of the pin wheel, as the two pins will engage in the slots twice as often as the single Fig. 13, -The Claw Type of Intermittent Motion, Used Principally on Motion Picture Cameras. pin. The addition of the second pin necessitates no further changes in the gear except that a second opening G must be supplied under that pin. The ratio between the periods of rest and motion in the star wheel depends entirely upon the relation of the diameters of the two wheels. The claw mechanism, while seldom used in projector construction, is used extensively in the cameras used for taking moving pictures. In the claw motion, a finger works directly on the film perforations instead of acting through a sprocket wheel. The "claw," driven by a suitable crank or cam, moves forward, engages with "a set of perforations in the film, and then moves down, carrying the film with it through a distance equal to the height of the picture. At the end of the stroke, the claws disengage from the film and return to the starting point ready to pull down the next section of film. A typical example of this type of feed mechanism is shown by Fig. 13, in which F is the film, A and A1 the claws, E the connecting rod and C the crank. When the claws are in the position shown, they are in engagement with the perforations in the film F. As the crank continues to turn in the direction of the arrow, the claw points are carried down by the rods E and pulling the film with them in the direction of the arrow R. At the bottom of the stroke, the crank pin moves to the left and the claws to the right, pulling them out of the perforations and free from the film. The claws remain a short distance from the film until the crank again reaches the top of the stroke and moves to the right, moving the claws again into contact with the film perforations. The claw rods are prevented from moving with the crank in a horizontal direction by means of the radius rod B which extends from a stationary portion of the machine. The radius rod is pivoted at both ends, permitting the claw rods to oscillate about the joints. (To be continued.) Releases Diplomatic Feature In "The Spy's Defeat," released on March 31, the Essanay Film Manufacturing Company offers exhibitors a two reel subject dealing with the intrigue of a Russian spy to obtain plans of a German fortification. The story is well told and leads up to a dramatic climax at the end of the second reel. It was produced under the direction of Harry M. Webster and the leading roles are taken by Francis X. Bushman and Miss Ruth Stonehouse. Briefly the story is as follows : Paul Heinrich, a young lieutenant and secretary to the German minister of war, is in love with Fredericka, the German minister's daughter. The lovers at the embassy ball encounter Count Plentoff, a Russian Spy, and Olga, his assistant, who have come in in search of the fortification plans. Plentoff hypnotizes Fredericka and bids her bring to him the plans. She is seen by Heinrich and when the latter attempts to overpower the Russian and regain the papers he is tripped up by Olga, and the Russians make their escape. It is later, discovered, however, that they are to meet General Petrovsky, of the Russian war department, at a lonely roadhouse and deliver to him the plans. Heinrich arrives at the roadhouse in time to overpower the Russians and finally recovers the document. In the meantime the German minister has discovered his loss and is bordering on despair when Heinrich returns triumphant. The minister, relieved and delighted, pins decorations of several high orders on Heinrich's breast and permits the betrothal of Heinrich and Fredericka. S. S. Hutchinson of American Film Mfct. Company and Stewart Edward White, famous author.