Procedure and device for synchronising cinematographic cameras with a projector

Claim 2

A cine-camera including apparatus for synchronising the speed of shooting the cine-camera with the rate of a projector, said apparatus comprising means for applying a marking on each of successive frames of a movie film during shooting, which marking has characteristics corresponding with a predetermined image frequency in shooting and which marking can be read at the time of projection in order to regulate the speed of projection, said apparatus further comprising a device having a number of colored filters adapted to be positioned to intercept light directed onto the edge of the film and means for coupling said device to the camera speed control switch such that the colored filter positioned to intercept said light correponds with the selected camera speed.

Claim 3

A cine-camera as set forth in claim 1 wherein said means for applying a marking comprises a light cooperating with the objective shutter of the cine-camera and said colored filters to apply marginal interrupted markings on each frame of the movie film during shooting.

Claim 4

A cine-camera including apparatus for synchronising the speed of shooting the cine-camera with the rate of a projector, said apparatus comprising means for applying a marking on each of successive frames of a movie film during shooting, which marking has translucent characteristics corresponding with a predetermined image frequency in shooting and which marking can be read at the time of projection in order to regulate the speed of projection and wherein said means for applying a marking comprises means for applying light of constant luminosity on the edge of the film during shooting such that the speed of movement of the film determines the translucent characteristic of the marking that corresponds with the instantaneous image frequency of the film in shooting.

Claim 5

A cine-camera including apparatus for synchronising the speed of shooting the cine-camera with the rate of a projector, said apparatus comprising means for applying a marking on each of successive frames of a movie film during shooting, which marking has translucent characteristics corresponding with a predetermined image frequency in shooting and which marking can be read at the time of projection in order to regulate the speed of projection and wherein said means for applying a marking comprises means for applying light of constant luminosity on the edge of the film during shooting such that the speed of movement of the film determines the translucent characteristic of the marking that corresponds with the instantaneous image frequency of the film in shooting.

Claim 6

A cine-projector including apparatus for synchronising the speed of a projector with the speed of shooting of a cine-camera in which a marking is made on each frame of a movie film during shooting, which marking has color characteristics corresponding with a certain image frequency in shooting, said apparatus comprising reading means for reading said marking and producing an output signal which corresponds with the image frequency at the time of shooting so as to enable said output signal to operate a speed control device that controls the speed of the projector corresponding to the characteristics of said marking, said reading means comprising means for producing a light signal through the edge of the film bearing the marking, color filter selector means arranged to intercept the light transmitted by the marking and means for sensing the light from the color filter selector means to sense the color characteristic of the marking and thereby control the speed control device.

Claim 7

A cine-projector including apparatus for synchronising the speed of a projector with the speed of shooting of a cine-camera in which a marking is made on each frame of a movie film during shooting, which marking has color characteristics corresponding with a certain image frequency in shooting, said apparatus comprising reading means for reading said marking and producing an output signal which corresponds with the image frequency at the time of shooting so as to enable said output signal to operate a speed control device that controls the speed of the projector corresponding to the characteristics of said marking, said reading means comprising means for producing a light signal through the edge of the film bearing the marking, color filter selector means arranged to intercept the light transmitted by the marking and means for sensing the light from the color filter selector means to sense the color characteristic of the marking and thereby control the speed control device.

Claim 8

A cine-projector as set forth in claim 4 wherein said last mentioned means for sensing comprises a photo-electric cell and at least one threshold switch coupled to receive the output signal of the photo-electric cell.

Claim 9

A cine-projector as set forth in claim 4 wherein said last mentioned means for sensing comprises a number of photoelectric cells, each respectively coupled to operate a threshhold switch, and said last mentioned means for sensing further comprising a number of impulse generators for transmitting a series of impulses of different frequencies, each frequency thereof corresponding with a different color characteristic of the marking on the film.