SU1307433A1 - Device for indicating conditions of film in film transport section of photographic camera - Google Patents

Abstract

The invention can be used in cameras whose gates and movement of the film are carried out by electric current. The purpose of the invention is to expand the operational capabilities and increase the life of the camera. The device contains a photoelectric sensor 1, amplifier-driver 2, frequency divider 3, keys 4- .8, delay circuits 9-11, pressure table control unit 12, pulse duration expansion circuit 13, display unit 15, switch 14, pulse generator 16, trigger block 17, comparator 18, power amplifier 19, time relay 20, engine 21, counting unit 22, decoder 23, coincidence circuits 24, 25, and setters 26 and 27 of frames with encoder. The introduction of new elements and the formation of new connections between the elements of the device allows us to exclude the movement of film with the imposition of a frame on the frame and the operation of the shutter when there is no tg

Description

1307433

Its VII in the film tract, spreading and increasing the accuracy are determined by the possibilities of working with the perforation of the number of unexposed and unperforated photo frames. 1 il.

The invention relates to photographs, in particular, to the structural elements of cameras, and can be used in a camera, the operation of the gates of which and the movement of the film is carried out by electric current, and preferably in human aerial photographic cameras (FAFD).

The purpose of the invention is to expand the operational capabilities and increase the life of the camera by eliminating the movement of film with frame overlapping K, addr and shutter operation in the absence of it in the film path, possibly working with perforated and non-perforated film, and increasing the accuracy of determining the number of unexposed frames,

An indication of the termination of the displacement of the film caused by its breaking or sticking 5 is introduced into the device a delay circuit and a pulse generator that triggers the electronic switch that turns on the incandescent lamp signaling the breakage (sticking) of the film, and simultaneously disconnects the electrical circuit from the unit control before the shutter solenoid of the camera j, and the absence of pulses at the synchronization input of the trigger block ensures that the comparator turns off the electric photo rewind motor tops

The display of the number of frames of unexposed photographic film, as well as signaling about its limited remainder and turning off the AFA after exposing a specified number of frames, is performed using the frame setting counter block with the decoders, the coincidence circuits and the decoder.

The possibility of using the proposed device for operation with both perforated 5 and non-perforated photographic films is provided

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rigid mounting of the disk with holes on the axis of the measuring roller, which leads to the independence of the functioning of the type of transported film in the film path.

The drawing shows a block diagram of the proposed device.

The device contains a photoelectric sensor; amplifier shaper 2, divider 3 frequencies, electronic switches 4-8, delay circuits 9-11g pressure table control unit 12, circuit, 13 extensions and shulcoB electronic switch 14, display unit 15, pulse generator 16, trigger unit .17 trigger5 comparator 18 , power amplifier 19, time relay 20, electric 21 motor. gatel movement of film, counting unit 22J decoder 235, schemes 24 and 25 matches, setting devices 26 and 27 frames with an encoder.

A photoelectric sensor 1, designed to generate electrical signals when moving a photographic film, consists of an optocoupler pair and a modulator, which is a disk with openings located along its periphery. The disk is rigidly connected to the axis of the measuring roller. The diameter of the disk and the number of holes in it are chosen so that when moving the film to a length equal to the size of one frame with an interframe spacing, ten pulses are received at the input of the splitter 3 frequencies. This number of pulses provides the most simple execution of the subsequent part of the electronic circuit.

Amplifier-driver 2 serves to form rectangular pulses of the required amplitude from the signals coming from the photoelectric sensor i,

Frequency divider 3 is designed to form one control pulse after 2 ten pulses are received from the amplifier amplifier.

The electronic switch 4 serves to receive the signal 1 upon receipt of a boost pulse from the splitter 3 frequency.

The electronic switch 5 is intended to turn on in the electric lamp indicator display unit 15, signaling a limited remainder of the frames of the unexposed film,

The electronic key 6 provides for switching on the audible siren in the display unit 15 and passing a pulse to the control unit for turning off the AFA after exposing a predetermined number of frames.

The electronic switch 7 is intended to match the low current circuit of the expander 13 of the pulse duration with the high current circuit of the gate electromagnet.

The electronic switch 8 serves to turn on the electromagnet to lower the pressure table when a pulse is received from the electronic switch 14 and to turn it off with a pulse coming from the delay circuit 11.

The delay circuit 9 is intended to block the operation of the electronic switch 14 until the first three pulses are received from block 2 of the amplifier-former.

The delay circuit 10 serves to enable the electric motor 21 to move the photographic film after the passage of time necessary for the operation of the shutter and to raise the pressure table,

The delay circuit 11 is designed to provide for disabling the control signal for raising the pressure table for the time required for the shutter electromagnet to operate,

The pressure table control unit 12 serves to turn on and off the pressure table electromagnet with a power voltage supplied from the electronic key 8,

The pulse width extension circuit 13 is designed to provide a shutter release after the passage of time necessary to lower the pressure table,

The electronic switch 14 serves to coordinate the operation of the electronic control circuits for the electromagnet of the shutter and pressure plate, as well as the motor for moving the film with the logical control strings,

The display unit 15 is designed to accommodate incandescent electric lamps, a sound siren and a multivibrator. One of the incandescent lamps signals the break of the film or its jamming, the other about normal rewinding, and a third about the limited remainder of unexposed frames. The duration of the lighting of the signaling lamps is set by the switching frequency of the multivibrator. An audible siren is designed to signal that the scheduled number of frames has been displayed.

The pulse generator 16 is designed to control the operation of the delayed circuit 9 over the synchronization input.

The trigger block 17 serves to generate control threshold signals that ensure the operation of the comparator 18 from short pulses coming from blocks 2,3 and 11,

The comparator 18 is designed to control the operation of the DC power amplifier 19, which provides the motor 21 for moving the film, depending on the magnitude of the output voltage of the comparator 18,

Time relay 20 is designed to hold c. the operating state of the motor 21 for moving the film to the appearance of the output voltage at the comparator 18,

The electric drive motor 21 serves to effect the transfer of the film.

Counting unit 22 is designed to set the total and count the remaining number of unexposed frames. It contains a pulse generator, which is used to set the total number of frames to be exposed, a counter and a counter indicator, showing the current value of the remaining unexposed frames,

The decoder 23 serves to translate the binary-decimal code of the counter into the decimal code of the indicator and feed it to the inputs with an axis 24 and 25 matches.

The latter are intended for the selection of decimal numbers in accordance with the data set on the gauges. 26 and 27 frames.

The frame setter 26 is used to set the number corresponding to the number of frames, on reaching which, in the display unit 15, the incandescent lamp turns on, indicating the remainder of a limited number of unexposed frames.

The frame adjuster 27 is designed to set the number corresponding to the number of frames to be exported. When this number is reached, in the display unit 15, an audible siren is turned on, indicating that the planned number of frames is exposed. Simultaneously with the activation of the siren, a pulse is sent to the control unit to turn off the AFA,

In addition to these, the remaining elements of the proposed device can be implemented using standard microcircuits and transistors: a frequency divider, a delay circuit, a pulse width extension circuit, a pulse generator, a comparator trigger block, a counter block, a decoder, and a coincidence circuit are assembled using appropriate types of microcircuits; the keys and the electronic switch, unit, indications, power amplifier and time relay are assembled on transistors; the frame master is assembled at the dependent switches; the control table of the pressure table is assembled using electromagnets j as an electric motor for moving the film can be used a direct current electric motor,

The device works as follows.

When conducting ground-based training for aerial photographic equipment or in flight, before the start of aerial photography, a number corresponding to the number of frames that can be exposed during aerial photography is set on the frame counter 22,

At the setting device 27 frames, a number is set corresponding to the number of unexposed frames, when reached, it includes: audible alarm, and a pulse is simultaneously sent to the control unit to turn off the AFA. These numbers are added up from the number of unexposed frames required for samples.

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in case of chemical-photographic processing, imprinting sensitometric wedges after discharging the cassette and testing the work of the AFA during post-flight training.

On the unit setter 26, a number is set corresponding to the number of frames at which the lamp is turned on, signaling a limited film residue that can still be exposed before turning off the AFA,

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When switching on the AFA to the operation of current pulses with a follow-up frequency set on the scale of the control unit, through the electronic switch 14 is sent to the electronic key 8 and the pulse width extension circuit 13, the Pulse through the open electronic key 8 provides the electromagnet operation in the pressure table control unit 12, Since in the initial state the pressure table is in a raised state, the pressure table lowers when the electromagnet is triggered and presses the film tightly to the alignment glass. The impulse, which arrives at the pulse expansion circuit 13, after extending its duration to time j equal to the time for lowering the pressure table, ensures that the rear through the front, via the open electronic key 7, actuates the gate electromagnet. The impulse, supplied to the electronic key 7, simultaneously enters through the delay circuit 1I to the electronic key 8 and transfers it to the initial (initial) position. After the shutter electromagnet has triggered, a pulse opens the electronic key 8 to the lift control unit 12 on the electromagnet. presser table8 Impulse through the electronic key 7, the circuit 10 of the delay and the time relay 20 is supplied to the electric motor 21 for moving the film. Time relay 20 is set to a time equal to the duration of the passage of the opaque portion between the double-row adjacent holes in the photoelectric sensor disk i. The motor 21 begins to move the film through a measuring roller, the rotation of which is transmitted to a disk rigidly connected with it

openings modulating the light flux in the optocoupler of the photoelectric sensor 1; Further control of the motor operation is carried out from an electronic circuit including a comparator 18 that compares the input signals from the two triggers located in the trigger block 17. The signals that are quenched in block 1, the number of which is proportional to the length of the rewindable film, are fed to the shaping amplifier 2. The pulses from the shaping amplifier go to the 3 frequency divider, delay circuit 9 and the trigger 17 block. The first pulse, which generates the amplifier-shaper at the counting input, starts one of the triggers of block 17. The signal from the delay circuit 9 arrives at the synchronization input of this trigger. I

The signal from the trigger output is fed to the comparator 18, which controls the operation of the electric motor through the power amplifier 19. The comparator supplies power to the electric motor until the signal from the second trigger arrives. After the tenth pulse arrives, a pulse is generated from the mapper 2 at the output of the frequency divider 3, which is fed through a second trigger to a comparator that switches the power supply to the motor for moving the film. The motor stops, the movement of the film stops.

After moving the film to a length equal to the size of one frame and the interframe gap, the pulse from the splitter 3 frequency goes to the electronic key 4 and to the counting unit 22. At the same time, the pulse through the electronic key 4 enters the display unit 15, where the glow lamp begins to glow, signaling normal moving film. The electronic key 4, when opened, transmits a pulse to the electronic switch 1A, which also receives signals from the delay circuit 9, which ensures the passage of a pulse from the control unit to the AFA electromagnet, t, e, the whole circuit is ready for a new cycle of operation. After the exposure of the next frame, each pulse arriving from the child of 3 frequencies to the counting unit 22,

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reduces the meter reading by one, as indicated by the meter indicator. From the output of the counting unit, 22 information in binary code is fed to the input of the decoder 23, and from the output of the latter, to the inputs of the circuits 24 and 25 matches.

When the remaining number of unexposed frames is equal to the value set on the frame setter 26, the coincidence circuit 24 is triggered, the electronic key 5 is opened, and a glow lamp turns on in the display unit 15, indicating a limited balance of unexposed frames.

When the remaining number of unexposed frames is equal to the value set on the 27 frames frame, the coincidence circuit 25 is triggered, the electronic key 6 is opened, and in the display unit 15 an audible alarm is turned on, informing you that the planned number of frames has been exposed and aerial filming of the AFA must be stopped. turning on the sound alarm closes the electronic key 5, turns off the glow lamp in the display unit 15, indicating a limited remainder of the unexposed frame c, and a signal is sent to the control unit to turn off the AFA,

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When the film from the amplifier-maker 2 breaks (jammed) to the counting synchronization input of the delay circuit 9, the pulses are stopped. As a result, after the third pulse arrives from the generator 16 pulses to the synchronization input of the delay circuit 9, it turns on an electronic switch 14 disconnecting the circuit from the unit

control up to the shutter electromagnet, and turning on the flash-lamp in the display unit 15, which signals the breakage (jamming) of the film. At the same time, no pulses are received at the synchronization input of the trigger unit 17, the comparator 18 turns off the film moving motor 21.

The resetting of the device is accomplished by pressing a button in the counting unit 22, which grounds the frame counter circuit.

Ph o rmula of the invention

A device for indicating the state of a film in a tape path of a camera, comprising a photoelectric sensor made in the form of an optocoupler and an aperture disk, an amplifier driver, a frequency divider, a pulse width extension circuit, a frame counter, an electronic switch and a display unit characterized by that in order to expand operational capabilities and increase

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the input of the second electronic key, the second input of which is connected to the output of the second delay circuit, and the output is connected to the input of the pressure table control unit, the third output of the electronic switch is connected to the input of the pulse width extension circuit, one of the outputs of which is connected to the input of the second delay circuit, and the second - with the output of the third electronic key, one of the outputs of which is connected to the shutter of the camera, and the second output is connected to the input of the third delay circuit.

the life of the camera by means of the 5-which output is connected to the input of the transfer of the film with the time, the output of which is connected frame position per frame and is activated with the motor of the movement of the film,

moreover, the input of the amplifier-former is connected to the output of the photoelectric

neither the shutter in the absence of it in the film path, the ability to work with perforated and non-perforated film and improve the accuracy of determining the number of un-exposed frames, a pulse generator, three delay circuits, a counting unit, frame adjusters j with encoders, decoder, coincidence circuit, trigger block, comparator, power amplifier, time relay, five

The second sensor, the amplifier of the former, is simultaneously connected to the second input of the trigger unit and the input of the frequency divider, the first output of which is connected to the third input of the trigger unit, two outputs of which are connected to two inputs of the comparator, the output of which is connected to the input of the power amplifier , the output of which is connected to the motor of the electronic keys and the control unit 30 of the film, the second output deprizhim table, and the output of the pulse generator is connected to the first input of the first delay circuit, the second input One of which is connected to the first output of the amplifier maker, and the first output is connected to the first output of the trigger unit, the second output is connected to the first input of the electronic switch, the second input of which is connected to the output of the first electronic key switch, the third input is connected to the control unit of the camera, and the first output of the electronic switch is connected to the input of the indicator unit

The second output terminal is connected to the first 45 with a camera control unit.

Editor T „M. Liteiko

Compiled by, Arkhipov

Tehred IL1OPOVICH Proofreader A, Zimokosov

Order 1630/48 Circulation 421Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5

Production and Printing Enterprise, Uzhgorod, st. Project, 4

the input of the second electronic key, the second input of which is connected to the output of the second delay circuit, and the output is connected to the input of the pressure table control unit, the third output of the electronic switch is connected to the input of the pulse width extension circuit, one of the outputs of which is connected to the input of the second delay circuit, and the second - with the output of the third electronic key, one of the outputs of which is connected to the shutter of the camera, and the second output is connected to the input of the third delay circuit.

moreover, the input of the amplifier-former is connected to the output of the photoelectric

The second sensor, the amplifier of the shaping device, is simultaneously connected to the second input of the trigger unit and the input of the frequency divider, the first output of which is connected to the third input of the trigger unit, two outputs of which are connected to two inputs of the comparator, the output of which is which is connected to the engine variable

The frequency module is connected to the input of the first electronic key, and its third output is connected to the input of the counting unit, the output of which is connected to the 5th input, the commander of the decoder, the output of which is connected to the first inputs of the coincidence circuit, the second inputs of which are connected to the outputs of the setters of frames, and the outputs coincidence circuits are connected to the inputs of the fourth and fifth electronic keys, the outputs of which are connected to the input of the display unit, and the output of one of these electronic keys is additionally connected

Claims (1)

Claim A device for indicating the state of the film in the tape drive of the camera, containing a photoelectric sensor 5 made in the form of an optocoupler and a disk with holes, an amplifier driver, a frequency divider, a pulse width extension circuit, a frame counter, a 1C electronic switch and an indication unit, characterized in that, in order to expand the operational capabilities and increase the life of the camera by means of a claim · - 1 'to improve the movement of the film with the overlay on the frame and the shutter to operate when there is no It can be used in the film-pulling path, the possibility of working with perforated and non-perforated 21 films and increasing the accuracy of determining the number of unexposed frames, it additionally includes a pulse generator, three delay circuits, a counting unit: frame units with encoders , decoder, coincidence circuit, trigger unit, comparator, power amplifier, time switch, five electronic keys and control unit 3t pressure table, the output of the pulse generator connected to the first input of the first delay circuit, sec the first input of which is connected to the first output of the driver-amplifier, and the first 3 output is connected to the first input of the trigger block, the second output is connected to the first input of the electronic switch, the second input of which is connected to the output of the first electronic key 4., the third input connected to the control unit of the camera, and the first output of the electronic switch is connected to the input of the display unit, the second output is connected to the first 4 input of the second electronic key, the second input of which is connected to the output of the second delay circuit, and the output is connected with the input of the pressure table control unit, the third output of the electronic switch is connected to the input of the pulse width extension circuit, one of the outputs of which is connected to the input of the second delay circuit, and the second to the output of the third electronic key, one of the outputs of which is connected with the camera shutter, and the second the output is connected to the input of the third delay circuit, the output of which is connected to the input of the time relay, the output of which is connected., with the motor moving the film, and the input of the amplifier-former is connected to the output of the photocell of the electric sensor, the second output of the driver amplifier is simultaneously connected to the second input of the trigger block and the input of the frequency divider, the first 'output of which is connected to the third input of the trigger block, two outputs of which are connected to two inputs of a comparator, the output of which is connected to the input of the power amplifier, the output of which is connected to the film moving motor, the second output of the frequency divider is connected to the input of the first electronic key, and its third output is connected to the input of the counting unit, the output of which is connected to the input m of the decoder, the output of which is connected to the first inputs of the coincidence circuits, the second inputs of which are connected to the outputs of the frame adjusters, and the outputs of the coincidence circuits are connected to the inputs of the fourth and fifth electronic keys, the outputs of which are connected to the input of the display unit, and the output of one of these electronic keys is additionally connected to the camera’s control unit.