DE2656651A1 - PHOTOGRAPHIC OR KINEMATOGRAPHIC CAMERA WITH A DISTANCE ADJUSTMENT DEVICE - Google Patents

Abstract

The camera has both a focusing device for the image of the subject to be taken in the film plane, and a focusing display device. In order for the user of the camera to be given a clear display of the respectively set distance, the display device consists of an acoustic signalling device which is switched on over a prescribed time internal and has an audio oscillator (6-10). In accordance with the respectively set distance or distance range, the acoustic signalling device emits a signal characterising the latter. The manually or automatically moved focuser (17) has operating members (12-17) which cooperate with the acoustic signalling device. <IMAGE>

Description

Photographic or cinematographic camera with a

Distance setting device The invention relates to a photographic or cinematographic camera with a focusing device of the image of the object to be recorded in the film plane and with a notch setting display device.

There are visible in the viewfinder display devices known that the Mechanically display the set distance value.

However, a correct distance setting is often used by users refrain from using the cameras. This probability is greater, the more attitudes must be done on the camera.

The invention is therefore based on the object of a photographic or to create cinematographic camera of the type mentioned, in which the The distance value set in each case is clear and unmistakable to the user of the camera should be displayed. The object is according to the invention through this solved that as a display device at least during a predetermined period of time switched on, a tone generator having signal device is provided, corresponding to the distance value or distance range set in each case emits a signal identifying this, with the manually or automatically moved Distance adjusters cooperating with the acoustic signal device actuating members having. Thus, each distance value or distance is advantageously area assigned a tone signal or a tone signal combination.

According to a further embodiment, the acoustic signal device is inevitable when the operating switch is operated or when the camera shutter is operated during a first actuation stroke switched on before the start of exposure.

According to a further embodiment, the acoustic signal device has in addition to a tone generator on a clock generator, by means of the actuators of the distance adjuster is the part that determines the tone frequency of the tone generator is changeable, while by means of the clock generator the tone signals in time with the clock pulse phases or clock pulse pauses are fed to an electroacoustic converter. The distance values respectively.

Distance ranges are advantageously determined by the pitch signals. Here you will expediently the audio signal with the lowest frequency the smallest distance value and the sound signal with the highest frequency the largest Assign distance value.

According to a further at least equally advantageous development the frequency of the tone generator is fixed, with a clock generator with provided by the actuators of the distance adjuster variable frequency with the clock generator at the smallest distance value or

Distance range has a high frequency and at the opposite largest Values correspondingly lower frequencies. In an advantageous manner a constant-frequency tone signal is emitted during a constant time phase and depending on the set distance value after a corresponding period of time repeated. The shortest distance value is expediently the shortest Assign the repetition time and the longest distance value to the longest repetition time.

for this purpose, the clock generator has means through which the clock pulse phase is kept constant, while the pulse pause time can be changed.

According to a further training, the clock generator is either with a Circuit point of the tone generator that switches the tone generator on and off or connected together with the tone generator to a link stage, in its output circuit the electro-acoustic converter is arranged.

According to a further advantageous embodiment, the audio signal device contains in addition to a tone generator and a pulse generator, one that can be controlled by them digital counting device and a predetermined number of connected to their outputs Linkage levels, the outputs of which can be selected using the distance adjuster are, by means of the control signal at the output of the selected logic level a switching stage for shutting down the pulse generator can be influenced. More expedient wisely one becomes one of the smallest distance value or the near distance range smallest number and, in contrast, the larger distance values or larger distance ranges assign a correspondingly larger number of tone signal pulses.

To turn on the sound signaling device only for a predetermined time to let, a monostable switching stage is advantageously provided through that of the tone generator and / or the clock generator and / or the counting device during are switched on for the specified time.

In the following, the invention is illustrated by means of three, in FIGS. 1 to 3 illustrated embodiments described. They show: FIG. 1 a first Embodiment, Figure 2 a second embodiment and Figure 3 a third Embodiment.

According to Figure 1, 1 denotes a battery that has a switch 2 can be connected to the circuit arrangement.

A clock generator consists of a NAND gate 3 and one Resistor 4 and a capacitor 5. A tone generator has a NAND gate 6, a capacitor 7 and three resistors 8,9,10.

Between the NAND gate 3 and the NAND gate 6 is an inverter stage 11 arranged.

The resistors 8, 9 and 10 each lead to an electrical conductor track 12 or 13 or 14. These conductor track segments 12 to 14 are on a carrier 15 arranged. A further conductor track designed in the manner of a circular ring is denoted by 16. It is on the one hand with the output of the NAND gate 6 and on the other hand with a Slider 17 connected. The slider 17 connects each line ring 16 with the respective conductor track 12 or 13 or 14. The wiper 17 is not in FIG connected to the distance adjuster as shown.

From the output of the NAND gate 6 leads via an inverter stage 18 Connection to a loudspeaker 19. The output of the inverter 11 is via a Switch 20 can be connected to the positive pole of battery 1. The switch 20 is over a mechanical connection 21 can be connected to a film counter 22, which causes that when the end of the film is reached, the switch 20 is closed and thereby the relevant input of the NAND gate 6 is constantly applied to plus potential. the The result is that the end of the film is indicated by a continuous tone.

The distance range set in each case is differentiated by a high-pitched tone signals which is in rhythm with the frequency of the clock generator 3,4,5 can be heard. The resistors 8,9 and 10 are dimensioned so that the resistance 8 a low-frequency sound signal, the resistor 9 a medium-frequency sound signal and the resistor 10 generates a high frequency sound signal.

In the embodiment of Figure 2 are the parts according to the figure 1 corresponding parts are given the same reference characters. To the different However, identification has indices.

With 23,24,25 a monostable multivibrator is designated. Such tilt steps are for example in the Siemens data book 1976/77 "digital circuit" under the Describe type designation FLK 101. The monostable multivibrator 23,24,25 is by means of a switch 26 can be switched on. The output of this flip-flop is with the input a clock generator connected, which. from a NAND gate 27, a capacitor 28 and consists of resistors 29, 30 and 31. Through the resistances 29,30 and 31 the clock frequency is set, with a lower distance range the resistor 29 has a high clock frequency, in an adjacent medium distance range the resistor 30 has an average clock frequency and in the adjacent distance range the resistor 31 generates a low clock frequency. The output of the NAND gate 27 is connected to one input of a NAND gate 32, the other input of which with the. Output of a tone generator is connected, which consists of a NAND gate 33, a resistor 34 and a capacitor 35.

Depending on the distance range set, for a predetermined period of time before the actual release process during a a repetitive acoustic signal is generated for a given duration. So you get at close range Rapidly repeating sound signals, in the middle distance range in one tone signals that repeat themselves in the middle of the period and slowly in the long range repetitive beeps.

In the embodiment according to FIG. 3, the parts according to FIG. 1 are given corresponding parts with the same reference numerals.

An RC element is designated by 36,37. The voltage of the capacitor 37 is via a switch 38,39 to the R input and to the input of an RS master-slave flip-flop 40 switchable, the output Q of which is connected to an AND gate 41. With help of the RS flip-flop 40, the AND gate 31 is made ready, which in the clock of Pulses of a pulse generator is controlled, which consists of two reversing stages 42,43 and an RC element 44,45.

With iG a digital counting stage is referred to, the in the aforementioned Siemens data book 1976/77 is described under the type designation FLJ 181. A first output A1 has connections to AND gates 47,48,49. Between the exit A1 and the AND gate 48 an inverter stage 50 is connected between them. A second Output A2 also has connections to AND gates 47,48,49, the Connection between output A2 and AND gate 47 via an inverter stage 51 takes place.

The output of the AND gate 47 is connected to the conductor segment 12 "/ the Output of the AND gate 48 with the line segment 13 ″ and the output of the AND gate 49 connected to the line segment 14 ″. The line ring 16 "is with the input S of the RS flip-flop 40 connected. In addition, the line ring 16 ″ has a connection to the reset input R of the digital counting stage 46.

A tone generator consists of a NAND gate 52 and one RC element 53.54. The output of the tone generator 52,53,54 is via an inverter 55 connected to the loudspeaker 19 ″.

The free input of the tone generator 52 is connected to the output of the AND gate 41 connected.

Depending on the position of the wiper 17 ″ is either the AND gate 47 or the AND gate 48 or the AND gate 49 with the input S of the RS flip-flop tied together.

After the switch 2 ″ is closed, the circuit arrangement is energized provided. After closing the contact 39 of the switch 38,39, the AND gate 41 controlled so that the pulses from the generator 42,44,45 to the input of the digital counter 46 arrive. If the grinder 17 ″ has the one shown in FIG Position on, after the first pulse of the generator 42 to 45 at the input S of the RS flip-flop 40, a voltage signal occurs, which the AND gate 41 locks. As a result, the tone generator 52 to 54 is turned off. Connects e.g. the slider 17 ″ the line segment 14 "with the line ring 16", so that AND gate 41 is only blocked after three pulses from generator 42 to 45. Simultaneously with the blocking of the AND gate 41, the counter 46 is also reset. Upon reaching the end of the film, the switch 20 "is closed and by the tone generator 52 bis 54 generates a continuous tone, which indicates to the user of the camera that a new film is an add.

Claims (9)

Claims CJ Photographic or cinematographic camera with a Focusing device of the image of the object to be recorded in the film plane as well as having a focus display device characterized in that as Display device a switched on at least for a predetermined period of time, a tone generator (6 to 10; or 33 to 35 or 52 to 5) having signal device is provided, which corresponds to the respective set distance value or Distance range outputs a signal identifying this, the manual or automatically moved distance adjusters (17 or 17 'or 17' ') with the acoustic Signal device having cooperating actuators (12 to 17). 2 .. Photographic or cinematographic camera according to claim 1, characterized characterized in that the acoustic signal device inevitably when actuated of the camera trigger (2) during a first actuation stroke before the start of exposure is switched on. 3. Photographic or cinematographic camera according to claim 1 or 2, characterized in that the acoustic signal device in addition to a tone generator (6 to 10) has a clock generator (3 to 5) and that by means of the actuating elements of the distance adjuster (17) which determines the tone frequency of the tone generator Part can be changed, while by means of the clock generator the tone signals in time the clock pulse phases or clock pulse pauses an electro-acoustic converter (19) are fed. 4. Photographic or cinematographic camera according to claim 1 or 2, characterized in that the frequency of the tone generator (33 to 35) is fixed is and that a clock generator (27 to 31) through the actuators (12 ' to 17 ') of the variable frequency distance adjuster is provided, wherein the clock generator at the smallest distance value or distance range a high Frequency and, on the other hand, larger values corresponding has lower frequencies. 5. Photographic or cinematographic camera according to claim 4, characterized characterized in that the clock generator has means by which the clock pulse phase is kept constant while the interpulse period is set by the distance adjuster is changeable. 6. Photographic or cinematographic camera according to one of the preceding Claims, characterized in that the clock generator either with one of the Tone generator switching point of the tone generator on and off or together is connected to the tone generator with a logic stage (32), in the output circuit the electro-acoustic converter (19 ') is arranged. 7. Photographic or cinematographic camera according to claim, characterized characterized that the tone signal device in addition to a tone generator t52 to 54) and a pulse generator (42 to 45), a digital counting device controllable by this (46) 'as well as a predetermined number of linkage levels connected to their outputs (47 to 49), the outputs of which can be selected using the distance adjuster (17 '') are that by means of the control signal at the output of the selected logic level (47 or 48 or 49) a switching stage (40) for blocking the flow of signals the pulse generator (42 to 45) can be influenced. 8. Photographic or cinematografisclie camera according to claim 7, characterized characterized in that between the switching stage (40) and the digital counting stage (46) a link stage (41) is arranged, the input side with both the switching stage (40) as well as with the output of the pulse generator (42 to 47) is connected. 9. Photographic or cinematographic camera according to one of the preceding Claims, characterized in that a monostable switching stage (23 to 25) is provided through which the tone generator and / or the clock generator and / or the Counting device are switched on for the specified time.