DE7224274U - NARROW FILM CAMERA WITH A BLADE ARRANGEMENT - Google Patents

Description

AGFA-GEVAERT AKTIENGESELLSCHAFT June 28, 1972

10-eh-bo Leverkusen '

PK 3? 2 / * JK 774

Cine film camera with a dissolve arrangement

The invention relates to a narrow film camera with a dissolve arrangement, whereby the winding reel or its drive can be stopped when the film is forwarded and faded out and the film is inserted into free cassette or camera rooms, and with an arrangement for fading in and out Film forward, whereby the operating mode can be preselected by a program switch. The invention has the task based on the control of the fade and the film reel drive or the preselection of the desired program particularly easy way to realize.

To solve this problem it is proposed according to the invention that the program switch comprises at least one control cam, through which a program wheel known per se, which controls the motor run and aperture in a known manner, to the camera « drive can be switched on and optionally a blocking means for the Fi Im coil drive with the coil drive in or out of engagement is controllable. A special part-saving design

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form can be achieved if the Progratnmrad and the blocking means each cooperate with a slide and when the control cam and edges of the slide are assigned to one another in such a way that in one direction of movement of the control cam only the slide controlling the program wheel and in another direction of movement of the control cam, both slides can be brought into the operative position. It is also useful that with the control cam a switch located in the motor circuit of the drive motor is coupled, depending on the position of the control cam is pivotable in the course of a cam of the program wheel.

With the invention it is possible in the simplest way to block the drive of the take-up reel as a function to control the selected program by a program switch without using the cross-fade mechanism or the automatic cross-fade Having to make tangible changes.

The invention is explained in more detail with reference to drawings Show it

1 shows a camera according to the invention when it is set to normal film transport,

FIG. 2 shows the camera according to FIG. T when it is set to fade in and out,

3 shows the camera according to FIG. X when it is set to cross-fading.

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The invention is based on a narrow-film camera 1, known per se and therefore not shown in detail, with an objective 2, an electric motor and a known device sBur fading. Cross-fading arrangements have become known that work with a program wheel 3, which controls the cross-fading functions "film advance and fade * ¹ ," film rewinding when it is connected to the motor or its gear, e.g. screw 4, by means of a switch 5 with shutter closed * ¹ and "canter shutdown * ^1. After the switch 5 has been returned, the camera is set to forward running again in the known manner, so that when the camera release (not shown) is pressed again, the PiIm is transported forward and over the length of the rewound piece of film. the aperture is opened again

Usually reversible electric motors are used, which are set to forward and back through the program wheel 3 Reverse rotation can be reversed. Either the snail perform a reciprocating movement or it can swiaohen the worm 4 and the motor through the program wheel controllable reversing gear can be provided so that the Sohneck · 4 always runs in the same direction. With the snail is still a gear 6 in engagement, which has a slip clutch 7 »it the film reel carrier on the camera side. 8 is engaged

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722427412.10.72

PK 372 / ΜΚ 774

According to the invention, a rag or pin is on the switch 5 provided, the normal film transport according to Figure 1 out of engagement with any other parts of the camera stands. In the camera 1, two slides 10.11 are guided displaceably via pin-and-slot guides> Kfa, 12 or 11a, 13. They can be removed from FIG. 1 by means of springs 14, 15 upper stop positions held. The program wheel 3 is rotatably mounted about the axis 15 on the slide 10. The slider has an upper edge 10b which extends so far on both sides of the axis of rotation 16 of the switch 5 that it is turned when it is turned of the switch 5 lies on both sides from the rest position 0 in the range of motion of the pin 9. The edge 11b of the slide a 11, on the other hand, is only in one position when the switch 5 is turned Direction (clockwise according to the figures) in the range of motion of the pin 9.

With the known cameras according to the Super 8 system the film spool carrier for cross-fading and film forwarding 8 blocked, so that the film exposed during the stop-down is not wound onto the film spool and can therefore be rewound. When the motor is actuated, the gear 6 then runs idle while through the effect of the slip clutch 6 of the coil enmi takers 8 and thus the film reel remain at rest. The transported

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The film is stored in loops in free storage space. For this purpose, a gear 17 is mounted coaxially with the gear C and is rigidly connected to the reel driver 8. The slip clutch 6 is conveniently located between the two gear wheels 6 and 17

To produce a cross-fade, the switch 5 is now rotated clockwise as shown in FIG. 3, so that the pin acts on the two edges 10b, 11b and moves the slide 10, 11 downward in the drawing under tension of the springs 14, 15. The tip lic comes into engagement with the gear 17 and blocks the reel driver 8. The film take-up reel is therefore prepared for a fade in the sense that when the film is advanced, it is not wound up but is stored in a loop. But the slide 10 has also been moved downwards, so that the program wheel 3 has come into engagement with the worm k.

As already mentioned, there are various options for controlling the motor with KMuera release and cross-fading. If the screw k executes a forward movement in the forward movement and a forward movement in accordance with a reversible motor, the movements here do not have to be

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essential control elements on the program wheel 3 should be designed so that the program wheel causes the film advance and the fade-out and also the switching of the motor when the film is rotated by 180 ° and then turned back by 180 ° when the film is returned. Another control disk has to be tensioned during the advance, which opens the shutter again over the same period of time after the switch 5 has been reset after film rewinding and when the camera is operated again during the next film advance. It is also possible, between the motor and the worm k to provide a reversing gear, so that the worm k at the film leader and the film transport back in the same direction expires and the program wheel 3 during forward and return transportation of the film performs a rotation of 360 ^0th Here, too, any control springs must be tensioned which, after the switch 5 has been reset to the position according to FIG. 1 and the camera is operated again, cause the fade-in over the corresponding length of the film. The known configuration of the program wheel 3 and these control means are not important in the present invention, since all known constructions can be used for this purpose.

A disadvantage of known blending arrangements based on this principle is that the take-up core is towards the end of the film in the cassette is so full that you can store files loosely

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PK 372 / HK 77 *

There is no more space available in the cassette for loops during dissolving and film advance. Will transitions anyway carried out, this can lead to Bo damage of the film. On the other hand, it can sometimes be desirable to have no fades, just fades in and out to be carried out when the film is advanced. Therefore, the present invention is intended to create the possibility of not just fades, but instead only fade in and fade out »

For this purpose, the switch 5 is rotated counterclockwise from the rest position according to FIG. 2, so that the pin only pushes the slide 10 downwards under tension of the spring Ik. Thus, the program wheel 3 comes into engagement with the worm 4, while the bobbin driver 8 is not blocked. Depending on the design; The program wheel 3 or the automatic cross-fade can then run different processes, but lead to the same effect.

With a program wheel 3 that only goes back and forth by 180 ° when fading is set to fade in and out while the program wheel is running, the film is transported forward by 180 because the reel driver 8 does not block is. This is dimmed while the drive is for

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PK 372 / MK 774

the fade in is already stretched, as is the case with

a dissolve is the case. After a turn of 180 ° however, the camera is switched off. The shutdown process can by hand or automatically by means of suitable switches and control means known per se. Then the Switch 5 reset to the rest position, so that a film rewind is omitted. If the camera is now operated again, the film continues to be transported forward while just like with a dissolve, the diaphragm is opened again over a piece of film that is the same length as the dissolve.

If, on the other hand, the program wheel 3 is designed so that when over-

glare the program wheel during the film advance and film

return transport covers an angular ^{distance of 36O 0} , then

it is also switched off after I80 with pure fade-in and fade-out. The following film transport then already takes place in

as described, the fade-in takes place again.

Of course, other exemplary embodiments, not shown for the sake of simplicity, are also possible. So could at the switch ί instead of a pin 9 also ~ "pins can be provided, the

sifed symmetrically to the rest position 0. In addition, As only indicated in Figure 2, a switch 19 * 20 can be connected or coupled to the pin 9, the contact 19 of which is in the

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The position shown in Figure 2 is offset by 180 ° to a cam 3a of the program wheel 3 · The switch 19, 20 is in the motor circuit. If the program wheel 3 has run down by 180 ° with film forward and fade-out, the cam 3a opens the Switch 19120 and automatically switches off the engine. Now switch 5 is set back to * 0 "to fade in and operated the camera again. In all other positions of the switch 5 and thus of the pin 9, the switch is 19, 20 closed and is outside the path of the cam 3a, so that the motor either effects the normal camera function or is controlled according to the control function of the program wheel 3 for cross-fades.

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Claims (4)

I ■ ■ I) II · ■ -10- AGFA-GEVAERT AKTIENGESELLSCHAFT June 28, iO-en-be Leverkusen PK 372 / fcK 77 * Claims. 1. Narrow film camera with a cross-fade arrangement, whereby the take-up reel or its drive can be stopped when the film is forwarded and faded out and the film is inserted into free cassette or camera spaces, and with an arrangement for fading in and fade out during film forward movement, the operating mode being preselected by a program switch, characterized in that the program switch (5) comprises at least one control cam (9), by means of which a program wheel (3), known per se, which controls the motor and shutter in a known manner, can be connected to the camera drive and optionally a blocking means (11 ) for the FiImspulentrieb (8) with the spool drive (8) can be controlled in or out of engagement. -11- 722427412.10.72 PK 372 / MK 774 2. Camera according to claim 1, characterized in that the program wheel (3) and the blocking means (lic) each cooperate with a slide (10, 11) and that the control cam (9) and edges (1Ob ₁ IIb) of the slide (10 , 11) are assigned to one another in such a way that in one direction of movement of the control cam (9) only the slide (10) controlling the program wheel (3) and both slides (10, 11) can be brought into the operative position in another direction of movement of the control cam (9) · 3. Camera according to one of the preceding claims, characterized in that that the two slides (10,11) are designed to be displaceable approximately parallel to one another and under the Effect of one return spring (14, 15) each. 4. Camera according to claim 3, characterized in that the Program wheel (3) can be switched to the same gear part (4) that drives the drive (8) of the take-up reel 5 · camera na co one of the preceding claims, characterized in, that with the StauernockexT "T9) one in the motor circuit of the drive motor lying switch (19,20) is coupled, depending on the position of the control cam (9) in the drainage path a cam (3a) of the program wheel (3) is pivotable For this purpose 2 sheets Ί 2 10 72