DE2049155C3 - Film projection device - Google Patents

Description

3 4

is possible especially with magnetic sound, so that a normal film projector 11 with an unwound openwork Monitoring of each individual sound track reel 12 and a take-up reel 13 for on one is desirable, according to a further development, 35 mm wide film strips combined copies for the invention at least one comparison circuit 8 mm narrow film type S, a tape player 14 with . provided, in which the output voltage is an unwinding 5 unwinding and take-up reels 15, a project inquiry unit with the output voltage of the playback wall 16 and a tape player 17 with a device for logging is compared endless belt, a so-called belt loop, 18. The and if there are discrepancies between the two outputs, the quadruple film copy 19 runs from the supply reel output voltages emits a signal. This one off 12 over a normal Baiud player 20 who, like The signal indicating the deviation can either be shown diagrammatically directly, as is the case with magnetic sound can be used to silence the whole arrangement - head arrangement: erase head, talk head, listening seat, or to have a lamp or some other head. From this band player 2Ö the runs Switch on the display device. Copy the film in the manner shown using the pre

This comparison circuit can either be parallel and rewinding drums of the projector 11 for winding

to the input of the reproducing system with the time i ₅ reel spool 13. The distance traveled by the copy

switches are connected, so that even small un- tape players 20, the tape player 14 and the endless

differences between the recording on the tape player 17 are synchronized with the projector 11

Trace and the trunk record can be identified, as indicated by the broken lines 21, 22

can that may not be loaded by the examiner and 23 from the Nachwickeltromniel to the individual

would notice, or is indicated for continuous monitoring ao devices; as already mentioned that should

All traces cannot be compared to each other. It cannot mean that all devices with the same

processing directly connected to the respective ear head run speed, but only that each

so that regardless of which track there is a fixed relationship between the respective recordings

When the query is made, the drawings are displayed correctly.

Interference is received. »5 With tape player 14 there is only one head

In the introduction it was said that a test is indicated schematically in front of the

lem is necessary for magnetic sound copies, optical sound drawing on the tape player running through

however, pien must also be checked. If the tape 24 from time to time after appropriate

this in a form that can be queried immediately (Philip-Mil strengthening and equalization, the clarity

ler process), can of course not be shown, a corresponding

of course, in principle, use the same arrangement - input voltage to the recording head in the tape

the one in which only the playback and interrogation units 20 are fed, so that all four audio tracks of the four

are modified accordingly, when using a combined film copies on the strip 19 corresponding

fast working developing device and / or be controlled accordingly. The schematically

with a sufficiently long delay of the scanned 35 indicated erase head of the tape player 20 can be in

Sound event it is however according to a special activity to be the soundtracks of the film copies

Formation of the invention possible to delete the arrangement, or these can be in a separate ar-

have also been magnetically neutralized for testing a film strip with at least one pass,

The readhead of tape player 20 is shown in FIG. 2

the sound events and the interrogation of the recording 40 shown in more detail at 25, it can be seen that this has four

treatment requires treatment. Listening heads that united the traces of the four

In the case of film copies with magnetic sound, film copies are assigned to the rental and scan them, also the requirement to record the sound. These individual hearing heads of the scanning hearing head 25 After returning the copy to check, as these are from the presenter with four connections of a timer 26 accidentally deleted or linked by a star-45, which is shown schematically as a rotating switch kes magnetic field may have been disturbed. For these four connections, each offset by 90 °, darge test an arrangement according to the invention can be that together practically the full extent can also be used, taking if desired on the path of the circumferential contact, the place of the trunk record to another so that the sliding contact is practically uninterrupted test copy can occur. Since there is so tension in this test, the four individual ones alternate visual examination of the image part usually not nen hearing heads of the common scanning head is required, is recommended to come according to a special. There is one on the circumferential contact Further development of the invention, the use of a playback system consisting of an amplifier Arrangement with comparison circuit, since then a 27 and a loudspeaker 28 are connected to this human auditor is not necessary, whereby 55 playback system can of course be used Rather, achieve considerable personnel savings from pre- and power amplifiers, mehsen. more loudspeakers, volume controls,

The invention is to be put together in more detail on the basis of the drawing taste equalizers, etc. -

be explained; it also shows, instead of the rotating switch, any-

Fig. 1 shows a preferred embodiment of the 60 any other time switch construction, both

Finding with a film projector and projection, for example, an arrangement of semiconductor switches

wall as a film viewing device.

F i g. 2 shows a part of an arrangement according to the invention between the time switch 26 and the input of the

tion for monitoring several audio tracks in the form of amplifier 27 is in the illustrated embodiment

a block diagram and 65 form of the invention of the endless tape player 17

F i g. 3 schematically that switches on a projection screen, which, as also indicated schematically

the arrangement according to FIG. 1 image received. is, in a known way, an erase head, a recorder

The in F i g. 1 arrangement consists of a speaking head and a large number of in the direction of travel

the tape loop wears hearing heads offset from one another. According to the running speed of the Ribbon loop, the hearing head dos loop device 17 is selected that corresponds to the running time of the film copy from Sampler headset 25 in tape player 20 to the standardized location of the pickup head, not shown in detail corresponds behind the image window of the projector 11, so that the output voltage of the respective ear head of the vit = r combined to form the pick-up ear head 25 Heads reached the input of amplifier 27 with a corresponding delay. Through this the part of the sound recording is reproduced by the loudspeaker 28; of the degree im Image window of the projector 11 corresponds to the image of the film copy, provided everything is in order.

As mentioned above, the film projector 11 is a normal film projector; H. designed for 25 mm film, and when such a projector is used to project a 35 mm wide film strip onto the four 8 mm cine-film copies of type S are combined, then all four copies are practically uniform projected. Normally, of course, there would not only be four copies side by side on the screen 16 but also four consecutive images of each copy, possibly resulting in an as Disruption or confusion of the auditor. In the illustrated embodiment is therefore the image window of the projector is provided with an appropriate mask so that the in Fig. 3 appears, which consists of four adjacent images 1, 2, 3 and 4 exists, while the rest of the screen, which corresponds to the normal image window, is darkened are as indicated by hatching. The beam path from the projector is also corresponding 11 to the screen 16 in Fig. 1 shown hatched.

An arrangement is thus made available by the invention and its special designs with the fourfold film copies with a sound recording corresponding to a master recording can be provided, and also with the picture quality and the sound recording in terms of their Allocation to the picture as well as its sound quality can be checked for all four copies can. - After passing the test, the four copies are made from the 35 mm film strip in the known manner separately and can then be shown on a normal projector suitable for the relevant format will.

1 sheet of drawings

Claims (7)

ι 2 claims: fung of the film image, sound transfer from a master record and sound control known 1. Film image projection device for film image testing (Swiss patent 328 769). purposes with a sound recording device The invention is based on the object analogously and a subsequent 5 in the direction of film travel for this known film image projection device Tonabtasteinrichtung, both in the film direction - simultaneous examination of the film image, sound over-spitting are arranged in front of the image window, for the development of a master record and control Simultaneous examination of the film image, sound over- when processing several in one film strip to enable playback of a trunk recording and sound combined film copies, where it control, characterized in that io is not possible, at the same time audio dubbing that the device for processing several in one and sound control at the standard-compliant place behind Make film strips of combined film copies at the same time as the image window. term consideration of the corresponding number This novel object is according to the invention of copies is designed, the sound recording is solved in that the device for processing several and scanning device with a corresponding film copies combined in a film strip the number of units equipped, and to simultaneously view the corresponding the scanning units are designed for the number of copies via a timer, the sound recording common playback system such an- nungs- and scanning device with a corresponding closed are that each individual scanning unit is equipped with the number of units, and the cyclically for a predetermined period of time with ao sampling units via a time switch to a geder Playback system is connected and that connected to the common playback system in such a way Simulating a sound scan behind the image - are that each individual scanning unit cyclically for window in a manner known per se a sound connection a predetermined period of time with the playback delay device, in particular an endless system is connected and that for simulating a tape recorder, between the scanning units and the sound scanning behind the picture window in a playback system is connected, with which the well-known way a sound delay device, input voltage of the scanning units by a time - especially a continuous tape device, between the scanning span is delayed, which is the same as the runtime of the units and the playback system switched, Film strip from the recording device with which the output voltage of the scanning units until the standard distance behind the image 30 is delayed by a period of time equal to window is. Duration of the film strip from the recording input 2. Arrangement according to claim 1, characterized ge up to the standard distance behind the indicates that there is an on-picture window with the time switch. When examining the picture, the one with a show for the scanning unit is connected, each such arrangement possible mode of operation nor the because it is switched through to the playback system. 35 unexpected benefit that the examiner at the same time 3. Arrangement according to claim 1 or 2, since several images are presented, and if of them characterized by the fact that at least one can be assumed that at least one of the synchronizing is provided in which the film copies are perfect, the examiner needs this output voltage of an interrogation unit to the same extent and with the output voltage of the playback device for the parent 40 same intensity as it was for the test recording is compared and which is required if a single copy is rejected, in which the differences between the two output voltages- P-jfer must at least know whether one is in the copy gen emits a signal. existing fade-in or the like actually provided 4. Arrangement according to claim 3, characterized in that if such a fade-in indicates that each comparison circuit appears 45 or the like on all copies, he can do so directly connected to the respective interrogation unit assume that this is likely to be provided. is. The examiner therefore also saves the time that was previously required 5. Arrangement according to claim 1 or 2 and 3, it was necessary for him to be familiar with such parts characterized in that the comparison of the film was made before he checked the copy,
circuit parallel to the input of the playback 50 In order to be able to determine more easily in which of the system is connected to the time switch. checked traces a possible error occurred 6. Applying an arrangement after one is expedient with the timer of claims 1 to 5 for checking a film connected to a display for the scanning unit, the strip, which is switched through between the audio transfer and the playback system. the scanning of the recording of a hand- 55 If a film image presentation according to the invention is required, the tester hears practically 7. Applying an arrangement after a continuous sound recording, which is cyclical of the preceding claims for testing comes from the individual audio tracks, and there Stöeiner existing film copy. Usually hung for long periods of time 60 faults fairly reliably in this way if only the switching time of the timer is sufficiently short. This switching time should be selected based on experience, and it should be sufficiently fast It is a film projection device for film review timers are commercially available,
purposes with a sound recording device and 65 If, however, very brief disturbances of a subsequent Tonabtast- sound recording in the film direction must be expected, for example device, both in the film direction before the wise if it is to be feared that the sound track Lük image windows are arranged for simultaneous Check or other brief malfunctions what is above