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124 OEIGINAL PETITION, EXHIBIT 9.
the film as to cause the successive images to be received thereon separately and in single-line sequence. The movements of the tape-film are intermittent, and it is preferable that the periods of rest of the film should be longer than the periods of movement.
By taking the photographs at a rate sufficiently high as to result in persistence of vision the developed photographs will, when brought successively into view by an exhibiting apparatus, reproduce the movements faithfully and naturally.
I have been able to take with a single camera and a tapefilm as many as forty-six photographs per second, each having a size measured lengthwise of the tape of one inch, and I have also been able to hold the tape at rest for nine-tenths of the time; but I do not wish to limit the scope of my invention to this high rate of speed nor to this great disproportion between the periods of rest and the periods of motion, since with some subjects a speed as low as thirty pictures per second or even lower is sufficient, and while it is desirable to make the periods of rest as much longer than the periods of motion as possible any excess of the periods of rest over the periods of motion is advantageous.
In the accompanying drawings, forming a part hereof, Figure 1 is a plan view, with the top of the casing removed, of a form of apparatus which I have found highly useful for the taking of the photographs. Fig. 2 is a vertical longitudinal section on line a: a: in Fig. 1. Figs. 3 and 4 are enlarged views of the stop mechanism of the photographing apparatus. Fig. 5 is a plan view of the shutter for the photographing apparatus, and Fig. 6 is a perspective view of a section of the tape-film with the photographs thereon.
Referring to the drawings, 3 indicates the transparent or translucent tape-film, which before the apparatus is put in operation is all coiled on a reel in the sheet-metal box or case 1, the free end being connected to an empty reel in the case 2. The film 3 is preferably of sufficient width to admit the taking of pictures one inch in diameter between the rows of holes 4, Figs. 2 and 6, arranged at regular intervals along the two edges of the film, and into which holes the teeth of