In the District Court of the United States, for the Eastern District of Pennsylvania, the United States of America, petitioner, vs. Motion Picture Patents Company, et al., defendants (1914)

707,934 justing the friction-roller 63 with relation to the friction-plate GG. The hub of the fricl ionroller is connected by an arm 70, having a screw-threaded sleeve through which passes 5 screw-threaded shaft 77, supported in bracket Ci and idapted to be turned by crank 78 to permit the adjustment of the friction-roller toward or from the center of the friction-plate to increase or diminish the rate of speed of to the friction-pl.tte shaft Go in a manner well understood, the rate of speed of the main shaft 23, connected to the friction-plate shaft Go through belt 30, being thus determined and regulated as desired. The pressure of the 15 friction-plate GO against the friction-roller GS is regulated by means of the milled-head screw 70, the point of which enters a depression in the end of the friction-plate shaft, as shown in Fig. 3. In Fig. 0 thefriction-speed 20 regulating appliances are shown adjusted for winding back the film from the receiving and delivering reel, the friction-roller GS having been shifted across the center of the frictionplate so as to. reverse the revolution of the 25 shaft Go. When winding back the film, the pulleys 73 and ~o are connected 03' belt 74 and the frames .57 58 are swung back, as shown in Fig. 7, so as to relieve the film of all binding tension. 30 The reel's may be of size suitable to carry any length of picture-bearing strip that may be desired. In operating the apparatus power is transmitted from the motor (not shown) by belt 72 35 and through friction-plate shaft by belt 30 to main shaft 28 of the apparatus. The operation of the gearing and the manner in which the teeth of the feed-drums engage the perforations in the edges of the picture-bearing 40 strip and move it from the delivering to the receiving reel and across the opening 06 in the line of the optical axis of the apparatus, with a momentary stoppage of the rilm crossing the optical axis as the central portion of 45 each picture is brought in the line of the optical axis, will all be understood from the preceding description. Wheuever the central portion of a picture is'in the line of the optical axis and the picture comes to res*jthe light 50 will pass simultaneously through the condensing-lens,throughtuepicture,and through the objective outward to the screeu or other plane surface. The light of course must be so adjusted as to cover the whole of the pic 55 ture. The pictures are projected successively with such greatrapidity, each succeeding picture showing a slightly-advanced stage of motion, that the effect on the eye of the observer is exactly the same as if amoving obr 60 ject or objects were being looked at directly. It is to be understood that many of the merodetailsof thCapparatus herein described may be varied without departing from. the principle of my invention — as, for example, 65 while the mechanism shown and described for forming the slack in the film and causing the picture-bearing strip to travel in such manner that there is a real stoppage of the film as each picture is presented in the line of the optical axis is the form and character 70 preferred by me, it is obvious that, the principle of the invention may be retained with differently-organized gearing and the employment of other" appliances than those shown and described. 7.5 Having described my invention, I claim as new — 1. The combination with devices for suitporting the bulk of a flexible film before and after exposure, of feeding mechanisms located 80 between the devices for supporting the film and separate and distinct therefrom, one of said feeding mechanisms being constructed to uniformly feed the ii-Im and produce a predetermined supply of slack, and the other 85 adapted to intermittently feCd.the slack across the exposure-window. 2. The combination with devices for supporting the bulk of the film before and after exposure, of feeding mechanisms located be 90 tween the devices for supporting the film and separate and distinct therefrom, one of said feeding mechanisms being constructed to uniformly feed the film and produce a predetermined supply of slack, and the other adapt 95 ed to intermittently feed the slack film across the exposure-window, and constructed also to cause the intervals of rest of the film to exceed its intervals of movement. 3. The combination with devices which sup 100 port the bulk of the film and supply it for ex posure and receive it after exposure, of positively-driven devices separate and distinct from the film-supporting devices, locate'd between them and at opposite sides of the ex 105 posure-window, and which respectively engage with and accurately and uniformly feed the film, and which respectively produce and take up slack'in it, and an intermittently-acting device located between said last-named no devices which intermittently moves the slackened part of the film across the exposurewindow. 4. The combination witn devices which s u pport the bulk of a flexible strip or film and 115 supply it for exposure and receive it after exposure, of positively-driven devices separate and distinct from the film-supporting devices and which engage the film and accurately compel its movement, and which feed the film 120 by uniform and continuous rotary action, and an intermittently-acting device located between said last-named devices and which moves the slackened part of the film picture by picture across the exposurewindow and 125 causes its period of rest to exceed its period of movement. 5. The combination with devices which support the bulk of a flexible film and supply it for exposure and receive it after exposure, of 130 positively-driven devices separate and distinct fpom the film-supporting devices and located between them atopposite sides of the exposure-window, and which cngagothe film