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Kinematographic apparatus

"Improvements in or relating to Apparatus for Taking or Displaying a Series of Photographic Images in Rapid Succession."

Kinematographic apparatus.-Relates principally to improvements in the feeding-mechanism of strips z, which are brought from a roller g and passed, if desired, to a roller g1, intended either to receive a series of photographs of objects in motion, or to project such photographs, previously taken thereon, upon a screen. A plate b, capable of sliding in a vertical guide c2, is provided with hollow studs e, e1, and a second plate c is connected thereto directly by a solid stud d1 passing through the hollow stud e1, and by a lever j and a solid stud d passing through the hollow stud e. The plate c carries the points c1 which enter the perforations of the film to feed the latter forward. The hollow stud e bears against the sides of a
groove a1, a2 in a circular roller a, the groove having two portions a1 at the greatest distance apart running at right-angles to the axis of the roller, and two other portions a2 at about an angle of 45° thereto. The solid stud d bears against the bottom of the groove, which is made deep for about 1/3 of its length, then shallow for about 1/6 and again alternately deep and shallow for another 1/3 and 1/6, the stud being forced always to the bottom of the groove by a spring f. By this arrangement the points are forced inwards and outwards at the required times, while the film is pulled down suddenly, and remains stationary for a much longer period. In another arrangement, there is only one pair of studs, which is situated as at d¹, e¹, and the groove on the roller is situated higher up so as to engage with these studs. In a modification, instead of a cam roller, a disc may be used having a cam-groove of varying depth therein.

Patents for inventions. Abridgment Class Photography, 1897, p. 41-42.