DE2151103C3 - Device for synchronized recording of a film and recording of sound on an audio tape - Google Patents

Description

3 4

is only switched on when the switching load is active. In the rest position, the lock 150 blocks the Ansistor is blocked again after it has previously been conductive blow 143 and thus prevents rotation of the was switched. The direct monitoring of aperture 141

the terminal voltage of the film advance motor is left above the trigger slide 152 is on

the delay time exactly gk.ch the start-up time of the 5 in the rest position open switch 154 on one

Film advance motor so that attached immediately after the immovable part of the camera. A con-

When the frequency of the changeover is reached, the tone cycle of the switch 154 extends into the

the tape feed motor is switched on. Change the trajectory of the projection 151 of the trigger

For example, the frictional properties of the film advance pusher 152

push z. For example, as a result of the operation of the film camera _{10, FIGS} . 2 and 3 show the movement doors following one another when the camera is started up and when the temperature is extremely low or extremely high, so the deceleration processes also change accordingly. There is approximately time for recording motion pictures, which ensures that the sound of the shutter release lever 152 moves upwards. The upward movement of the trigger slide is always switched on for the tape feed motor only when the tape change frequency is actually reached. 15 152 the switch 154 is closed so that it is enough Sufficiently large supply, the lock 150 on the trigger slide 152 is still voltage to be monitored by the supply source, since the stop 143 is located in the orbit of the stop 143, which is part of the disc 141 for proper operation, and thus the supply voltage of the switching terminal is too low - io rotation of the rotating screen prevented (Fig. 2). If the sistor is not in its conductive state, the further movement of the trigger slide 152 in its end position, also not in its locked state, gives the lock 150 the stop that can be switched over, thereby releasing the switch-on while the switch 154 further conditions for the tape feed motor does not remain closed, so that the rotating diaphragm 141 can be reached. The main advantage of the new a _{5 is} now starting to turn in the direction of the arrow. In each device, however, the film image is exposed as a function of the actual full rotation of the rotary diaphragm 141 when the film advance motor is running up.

Control of the delay time for switching on When the motion picture camera is stopped, the

of the tape feed motor in contrast to the sequence of movements described above around and

in all comparable known devices 30 runs in the sequence from FIG. 3 to FIG. 1.

provided constant delay time, which for The individual parts have one of the described

the mean operating behavior of the film advance corresponding mode of action,

motors is set. The trigger slide 152 is usually from

The invention is operated on the basis of one in the drawing hand, so that one with the closing of the In the exemplary embodiment shown in the illustration, switch 154 simultaneously enables the circulation. In detail, aperture 141 shows is practically impossible. Even with one

F i g. 1, 2 and 3 are schematic representations of the actuation of the trigger slide by means of an electrical

Explanation of the relationship between a circulating magnetic or other quick release device

lens and a trigger slide in one device is the timing of the release of the

Film camera of the type used here, 40 revolving shutter 141 on the closing of the switch

F i g. 4 a schematic representation of the drive 154 due to the aforementioned deviation

the film camera, tolerance of + 0.1 seconds still achievable.

F i g. 5 shows a circuit arrangement of the new front. In a camera with the above-described

direction, NEN trigger arrangement was found that the

F i g. 6 shows the mode of operation of the in FIG. 5 the strength of the current supplied to the motor 148

showed the signal representing the circuit arrangement - such as the voltage present at the motor in the in

diagram and fig. 2 state of current intensity and voltage

FIG. 7 shows the relationship between which in a voltage in the state of FIG. 3 are different. on

Position of the rotating shutter and the shutter release - the basis of this knowledge are with the new one

1, 2 and 3 of the 50 device to the changes of current and

Film feed motor flowing current and the voltage responsive devices in the form of a

Signal diagram indicating the corresponding voltage. electronic circuit arrangement for controlling

Figs. 1, 2 and 3 show a device for the tape recorder provided by means of

Synchronize the start and stop of the start and stop of the tape device

The camera and the tape recorder can be precisely synchronized with the relationship 55 with that of the motion picture camera

is between a release element for the rotating shutter.

the camera and a switch for making and This circuit arrangement is shown below

Interrupting the power supply for the electric motor hand of FIG. 5 explains

the camera. Inside is a transistor 157 with its base across

A rotating diaphragm 141 is on a shaft 144 60 a resistor 158 and the switch 154 on the positive

stored and has an exposure window 142 and tiven pole of a voltage source 155 and further

a stop 143 on. The shaft 144 is connected to a connection of the electric motor 148

Gears 145, 146 and a friction spring 147 closed. Another connection of the electric motor

A friction fit with the drive shaft 149 of the elec- tric 148 is at the negative pole of the voltage source 155

tromotors connected (Fig. 4). Connected to one side of the 65 and through a resistor 159 am

Stop 143 is a release slide 152 arranged negative pole of a further voltage source 156.

net. It has a barrier 150 as well as a projection with its collector, the transistor 157 is on

151 and is through a spring 153 downwards to the negative pole of the voltage source 156 and with

its emitter has a value that is entered with a fixed value. This results in an increase

stood 161 in series connected variable resistor 160 of the connection voltage between the base unc

applied to the base of a transistor 162. The base of the emitter of the transistor 157 lying against

of the transistor 162 is also via a resistor level 158 and thus one to control the Tran

163 with the negative pole of the voltage source 156, 5 sistor 157 sufficiently high voltage, so that dei

its emitter also becomes conductive with the negative pole of transistor 157 and to the resistor

Voltage source 156 and its collector across a 16, 161 and 163 has no voltage. The Tran

Resistor 164 with the base of a transistor 165, sistors 162 and 165 therefore remain blocked. Tue <

connected. between the base and the emitter of the transistor!

The transistor'165 is with its base also io 157 applied voltage is due to the resistor

via a resistor 166 at the positive pole of 158 and the strength of the friction spring 147 is determined

Voltage source 156, with its emitter also in the mutual position shown in FIG

at the positive pole of the voltage source 156 and with the rotating shutter 141 and the switch 154, whom

its collector via a relay coil 167 on the nega- so the motor current / and the voltage V the span

tive pole of the voltage source 156. 15 voltage source 155 in Fig. 6 for the period Γ

Having a plotted value that can be actuated by energizing the relay coil, the strength is dei

Working current contact leads to a remote control motor current / considerably below that to the on

connector 168 for the tape recorder. control the transistor 157 required minimum

The operation of the control value I ₀ described above, so that it is blocked and a voltage

Rungseinrichtung for the tape recorder ao is applied to the resistors 160, 161 and 163

is below with reference to FIG. 6 and 7 explained. This turns transistor 162 and thus also de:

In the state shown in Fig. 2, the Um transistor 165 is conductive, so that the Rclaisspule 16 '

Barrel 141 prevented from rotating, although attracts and closes the relay contact. That with the

switch 154 is closed. Tape recording connected to relay contact in this state

if the motor 148 rotates the device is set in motion.

Friction spring 147 generated frictional resistance to the recording of motion pictures under

overcome and is therefore overloaded. As a result, rises broken, so the revolving diaphragm 141 and dei

the motor current / and the voltage V of the span switch 154 from that shown in FIG. 3 in FIGS. ii

Power source 155 decreases, as in FIG. 6 for F i g. 2 and finally the state shown

a time period T _{1 is} shown. 3 ° in the in F i g. 1 shown. In this way he leaves it

In the in F i g. 3 trigger position shown, the tape recorder synchronized with the

the motor 148 can be found in its normal continuous motion picture camera starting and stopping,

operating state, wherein the current intensity / is the capacity of the voltage source 155 bi;

and the voltage V of the voltage source falls below the voltage required for operation

155 increases, as in Fig. 6 for the time period T ₂ 35 range V _n , decreased, then the following results:

is shown. In the state shown in Fig. 2, di (

The transistor 157 is controlled by the strength of the current flowing to the motor 148

The strength of the motor current is determined if it exceeds the limit, however, due to the reduced

stood 158 has a constant resistance value. Capacity of voltage source 155 does not have the value / ₀

The relationship between the strength of the motor- 40 being the voltage also below the values

Current / and the voltage V of the voltage source V _t remains. Accordingly, transistor 157 remains ge

on the one hand and the operating state of the transistor blocks and the connection voltage of the resistors

157, on the other hand, can be seen from FIG. In it 163 between the base and the emitter of the Tran

denotes / ₀ the sistor 162 for driving the transistor 157 remains low, so that the transistor

Required minimum strength of the motor current, V ₁ is 45 ren 162 and 165 remain blocked and the relay

the coil 167 required to drive the transistor 157 is not energized. Thus the tape becomes

Minimum voltage of voltage source 155, V _m recorder not started. In the ii

draws a voltage range, within the state shown in Fig. 3 the strength is reduced «

the voltage source 155 can be used effectively, the current flowing to the motor 148 continues

and V ₀ denotes a voltage range within 50 so that the transistor circuit does not respond to

half of which it cannot be used effectively, the tape recorder remains idle

Provided that the voltage source 155 has sufficient such start-up control for the tape record

Has voltage and is therefore usable, mingsgerät reduces the risk of failure de

is that of the engine 148 in the state according to FIG. 2 to- Synchronization of sound and image, as this has a

current intensity greater than I _n and the motor 55 such device controlled recording devices

current / as well as the voltage V of the voltage source very quickly on starting and stopping de

lie within the in Fig. 6 for the time period T ₁ motion picture camera responds

For this purpose 2 sheets of drawings

Claims (1)

1 2 elapsed time is less than the delay Patent claim · time of the delay circuit. This will but in most operating states part of the Device for synchronized film recording is wasted, since the individual images running before the appearance of a film and the recording of sound on the start mark on the optics of the film camera in front of a tape with a delay switch are not set to music, i.e. neither for delayed switching on of the tape before these Sound reproduction is possible.
feed motor after the start of the film advance- One of the DT-GM 18 24225 is electronic motors, characterized in that a stabilized delay arrangement for a start the delay circuit (157, 161, 162, 167) io marking with image-synchronous sound recording legs a switching transistor (157), which knows when the dropping, which a relay for delayed switching on the terminal voltage of the film feed motor of a magnetic recorder and for delayed shutdown (148) as a result of its start-up, and when a light bulb exposing a film is switched on, the terminal voltage increases as a result of the motor speed becoming constant again after the film feed motor has been switched on. The relay is located in the emitter path becomes non-conductive, as well as a further switch of a transistor, the base of which has a timing element of forming components (161, 162, 167) , the supply voltage is controlled. The timing element, which is switched on when the switching transistor is switched back, receives a stable supply voltage with the help of Zener diodes, which emit independent of the output signal causing the act, ao neuter supply voltage of the supply source and any changes in the switching properties of the components due to temperature change of course is. The transistor therefore switches regardless of the actual size of the The supply voltage delivered by the supply source after a very specific delay time in its main The invention relates to a device of. State and thus energizes the relay, which is its for synchronized recording of a film as well as since the magnetic device turns on and the glow recording turns off sound on a tape with a lamp. Delay circuit for enlarged switch-on. This well-known delay arrangement also pray of the tape feed motor after the start of the uses thus a fixed and mostly empirically determined Film advance motor. Delay time after which after switching on the In such a device from DT-AS 18 09 243, the film feed motor and the tape feed device is switched on after switching on a motor. This delay time of the film advance motor with the help of a delay 35 must be chosen so large that under all switching on the operating states possible by the film advance motor, the ported film applies a start mark before it expires, and reaches the frame rate of the camera, that is, the one compared to the one on the respective transport lead-up time has ended with certainty.
the beginning of the film related to a few frames. The object of the invention is to provide a new device is arranged shifted. Simultaneously with the 40 device for synchronized recording of a film Making this start mark on the film and recording the sound on a tape will also create the tape feed motor with the help of which the delay time until calibration Delay circuit switched on. switch the tape optimally to the actual one At the end of each with the exposure of the operating behavior of the film advance motor to be transported 45 sound recordings made in the film. According to the teaching according to the invention, this is on the transported tape this tape a stop marker is provided, the object is achieved in that the delay switch for switching off the tape feed motor device a switching transistor, which is used when falling. The terminal voltage of the film advance motor used in the known device as a result of the delay circuit is constructed as an RC element , 50 when it starts it is conductive and when the terminal voltage used for the desired delay rises due to the time constant becoming constant, it is to be dimensioned as far as possible so that the motor speed becomes non-conductive again , as well as the activation of the tape feed motor, which acts as a further switch forming components, always shows the start marking on the film, which is applied when the switching transistor is switched back, when it is ensured that the activation of the tape feed motor before the film feed motor has reached its nominal speed emits an effective output signal.
has, so the acceleration process of the film. With the new device, the gill camera is ended. Since this acceleration bias voltage or the motor current of the film process is monitored directly by the mechanical film transport device push motor, this device, the Füm itself, the electrical components 60 dropping out during the start-up of the motor and when the supply circuit for the film feed motor and the motor speed become constant, So after which is also dependent on the supply voltage, the start of the motor must increase again. With this time constant of the delay circuit so chosen, the new device has a switching mode that, under all possible operating conditions, the acceleration process is actually conductive when the terminal voltage drops and is already terminated when the terminal voltage rises. However, this means that it is blocked again. In most of the operating states of the film camera, the switching transistor is connected to other components in such a way that the tape feed motor is via these components until the acceleration process is completed