Motography (Apr-Dec 1911)

August, 1911. MOTOGRAPHY 77 1. In a device of the class described, a supply roll, a takeup roll, a film extending from one roll to the other, endless chains having grippers, said grippers having gripping surfaces for engaging the film, and means for intermittently causing said surfaces to feed the film. 2. In a device of the class described, a supply roll, a takeup roll, a film extending from one roll to the other, an endless chain on one side of the film and an endless chain on the other side of the film, each of said chains formed with grippers having gripping surfaces to engage opposite sides of the film near the edges thereof, and means for driving said chains. 7. In a device of the class described, a feed roll and a takeup roll, an endless chain on one side of the film and an endless chain on the opposite side of the film, said chains carrying a series of co-acting grippers having gripping surfaces at the ends thereof to grip the film near its edges, said chains carrying a series of rollers, yielding tracks for the rollers, said tracks causing the grippers to engage the film, and means for moving said chains. 16. In a film feeding mechanism, a pair of conveying members located upon opposite sides of the film, means for driving said members, and a guide or guides located adjacent to said members for directing said members toward and into engagement with the film. No. 988,792. Method and means of Producing Synchronism Between the Rotation of a Controlling Machine and the Rotation of One or More Electrically Driven Machines. Eugene L. A. Lertourne, Rouen, France. This invention has a direct application to the ever recurrent subject of "Talking Pictures," offering, as it does, a suggested means and method for keeping the projected pictures and the phonograph in unison. In his preliminary description, the inventor says : The object of this invention is to synchronize the relation of a controlling machine driven by a motor of any kind and the rotation of one or more dependent machines driven by an electric motor. This invention consists substantially in directing the electrical current collected by the successive contacts of a rotary distributer of which the rotating part is driven by the con trolling machine, into the successive contacts of a rotary receiver of which the rotating part is driven by the controlled machine, the contacts of the receiver, each in turn sending the current to the motor of the dependent machine and thus compelling the latter to adjust its speed to that of the rotating part of the receiver, that is, to progress by successive positions, or from one contact to the next contact. According to one way of carrying out this invention a current too strong, continuously pushes the brush of the receiver on the next contact which is inoperative. According to another way, the next position, instead of being inoperative, corresponds to a second circuit traversed by a current which is too weak for the synchronous running, thereby rendering the successive shocks less appreciable than in the preceding case. According to a third way, the current normally passes in a circuit regulated for synchronism, while two other circuits, the one having a large resistance and the other a small resistance, return the brush of the receiver into the synchronous position of synchronism so soon as it has moved from such position, the shocks being thus only accidental. According to a fourth way, electrical apparatus which are provided with signals are introduced in the circuits 988.981. in order to enable the working of the current in the said circuits to be followed and the resistance to be regulated in such a manner that the current shall remain always in the same circuit, thus tending to the suppression of accidental shocks. Further by means of this invention the accidental disturbances of the synchronism are remedied by changing by hand, the position of the rotating part of the receiver or of the distributer in relation to its fixed part. This invention also allows of simultaneously starting and stopping the machines by arranging the movement of the starting lever of the controlling machine to be governed by the interrupter of the current. Finally this invention facilitates the controlling or governing of any desired number of dependent machines by means of a single controlling machine. Each dependent machine is provided with its own electric motor and its own rheostat, its own regulating circuits and its own receiver so that it is merely necessary to connect the contacts of the receiver to the corresponding contacts of a single distributer operated by the controlling machine. The accompanying diagrammatic drawings illustrate applications of this invention to phonokinematographic synchronism, the kinematograph being in this example the dependent machine. Of the drawings, Fig. 5 is reproduced accompanying this review; in connection with the general description above quoted, the invention may be understood. Of the seventeen claims, the following are selected : 1. The combination of a controlling machine, a rotary distributer driven^ by said controlling machine, a dependent machine driven by an electric motor, a rotary receiver driven by said dependent machine, electrical circuits in which are comprised the successive contacts of the receiver, said electrical circuits being in series with the motor, resistances of different values automatically included in the said circuits and said resistances permitting an electric current to flow through said electric circuits as specified. 5. The combination of a controlling machine, a rotary distributer driven by said controlling machine, a dependent machine driven by an electric motor, a rotary receiver driven by said dependent machine, electrical circuits in which are included the successive contacts of the distributer and the successive contacts of the receiver, resistances comprising electric signals, said resistances being included automatically in the said circuits, and permitting the passage of an electric current through them as specified. 12. The combination of a controlling machine, a rotary distributer driven by the said controlling machine, the stationary part of said distributer being the contacts, a dependent machine driven by an electric motor, a rotary receiver driven by