Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . by means of drawing, attached to sprocket-roller. This star-wheel is marked 104 and 105, and at the first glance there appears a great resemblance to Edisons device shown in Figs. 78 and 79. But this latter was purely an escapement mechanism; the toothed wheel always had power applied to it, but could not turn because it was locked, and therefore its driving-pulley slipped. When a slot arrived in place the tooth escaped straight through it; the interaction of the w
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . by means of drawing, attached to sprocket-roller. This star-wheel is marked 104 and 105, and at the first glance there appears a great resemblance to Edisons device shown in Figs. 78 and 79. But this latter was purely an escapement mechanism; the toothed wheel always had power applied to it, but could not turn because it was locked, and therefore its driving-pulley slipped. When a slot arrived in place the tooth escaped straight through it; the interaction of the wheels supplied no power. But in Petits machine the slots were not straight; they acted as cams. It will be seen that the wheel b was held perfectly steady, the wheel a resting between two teeth. As the slot 3 approached the wheel b, a slight protuberance, 4, drew a tooth into the slot, which then forced the tooth through to the other side of the wheel a, thus rotating b and the sprocket-roller with it. It will be seen that a serves the double purpose of driving b round intermittently and also of steadying it between Fig. 105. CHRONO-PROTOGEAPHY. 103 Another invention of considerable interest waspatented in Germany by Miiller of Cologne on the25th August, 1895 (No. 92,247). There is no need togive a full description of the apparatus, for Fig. 106proves that it was identical in principle with Acres*Kinetic Camera shown in Fig. 97, a spring-actuated
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
