DE1273381B - Data processing arrangement - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

JLJLJk

GERMAN #M \ PATENTAMT Int. Cl .:

G08b

EDITORIAL

G08c G09f German class: 74 c -12/01 Number: 1,273,381 File number: P 12 73 381.2-35 (T 24467) Registration date: August 10, 1963 Display day: July 18, 1968

The invention relates to an arrangement for processing a number of pulse-like, of a plurality remote stations of incoming query signals for the purpose of obtaining response signals from data, which z. B. refer to stock exchange transactions, securities or stock exchange prices and at a central station, which is connected to the remote stations via individual signal transmission circuits, to storage arrangements, such as magnetic drums, and for generating response signals in the form of a series of separate data, each such row corresponds to or is assigned to a question input signal.

Systems for displaying stock market prices or other stock market data are already known in which Corresponding data are stored at a central station, which after implementation of Control processes at the manually operated central station in the form of pulse-like signals sent to external stations and displayed there optically on display boards. All course display boards receive the same signals, so that an individual operation of individual distant Stations is not given.

An arrangement of the type mentioned at the outset has also been proposed in which the remote Stations scanned periodically by a scanning device in a central storage station to determine requesting stations and the resulting scanning signals on a Record memory in the form of a magnetic drum.

The object of the present invention is to create a data processing arrangement, with the remote stations after sending out request signals extremely quickly with in a central one Station stored data that relate in particular to stock exchange transactions and the like. Supplied can be. In addition, it should be possible to use the data that has already been saved can be brought up to date at any time.

To solve this problem it is proposed according to the invention that in the case of the aforementioned Data processing arrangement the signal transmission circuits of the remote stations from a Scanning device periodically scanned and the scanning signals generated thereby in a memory arrangement (Question section) that the scanning signals are recorded before they are recorded a control circuit (question logic) running, which is already in the memory arrangement (question section) Data processing arrangement

Applicant:

The Teleregister Corporation,

Stamford, Conn. (V. St. A.)

Representative:

Dr. H. Wilcken, patent attorney,

2400 Lübeck, Breite Str. 52/54

Named as inventor:

Emik Alexander Avakian, Crestwood, NY;
Robert Joseph Buegler, Stamford, Conn .;
Jack Knoll, Plainview, NY (V. St. A.)

recorded samples is responsive to a duplicate recording of the same sample during two successive scans of the signal transmission circuits by the scanning device to prevent the control circuit after performing the signal comparison between her and controls the question recording circuits provided in the memory arrangement in order to receive the inquiry signals or Scanning signals at fixed, the requesting remote station assigned storage locations on the Memory arrangement to record that the scanning device every single one on the signal transmission circuits the incoming pulse of the request signal is scanned or determined at least once, that switching means are provided which the query data recorded on the memory arrangement a central data processing device, which receives the request data and this Data associated output signals generated that these output signals to identify the to the corresponding query signals belonging response signals are used and, coming from the data processing device, on the memory arrangement (Answer section), each output signal series being a respective question signal which is stored in a memory location that corresponds to the requesting remote Station is assigned that scanning means at high speed the relevant storage locations for scan all remote stations in a fixed sequence and the scanned output signals generated in this way fed to a logic output circuit

809 570/62

which corresponding response signals pointed to on which the question signal, which is via the Form of a series of individual pieces of data that is transmitted to the line, is composed. That lines leading to distant stations, where searching for the voter pulses is carried out by a scanning device each response signal is carried out by the corresponding remote device 16, which switches Station is sent from which the associated 5 contains circle (e.g. an ordinary logical Tran question is assumed, and that the output switch sistor circuit), which is suitable, the lines 12 All output lines are periodically closed with a high sequence with a single input line 18 speed operated in such a way that no distant connect. The circuit 16 is by address station an appreciable time between the over-signals over an address line 20 in the way carrying the recorded data parts to wait 10 controlled that 'the special line 12, which is currently needs and that all remote stations are effectively scanned, the associated segment on the are supplied with response signals at the same time. Magnetic drum 14 as well as the under the magnetic

The invention will now be applied to a drum mounted recording head 22 Attached drawings shown is ordered. example explained in more detail. It shows 15 the entire time interval of the current opening

F i g. 1 is a block diagram which is schematic and closing during the dialing process the main parts of the arrangement shows about 100 milliseconds, e.g. B. 50 milliseconds

F i g. 2 part of a magnetic storage drum for "opening" and 50 milliseconds for that and the arrangement of the "closures" stored on the drum. However, this can be 100 milliseconds Dates and 20 interval under certain circumstances in ratios

Fig. 3 further details of the arrangement of the 70 to 30 or 30 to 70 be divided. To everyone data stored on the drum. possible changes in the state of the lines

The in F i g. The arrangement shown in FIG. 1 contains a 12 to determine a scanning speed of Group of voter telephones 10, up to at least one sample per 30 milliseconds a number of 1024, each of which to one ent- 25 required. In the present embodiment will be speaking output line 12 is connected. The lines 12 symbolically once every 16.5 milliseconds indicated telephones are in effect keyed using a drum Brokerage offices are arranged and serve the 14, which every 33 milliseconds a full Broker executes the latest security prices as HiUe at the turn and which lines 12 To transmit the settlement of securities transactions. 30 scans twice per revolution of the drum. The system is capable of almost instantaneous data from the sampling pulses on input line 18

of several thousand effects to deliver. To do this run to a control circuit, commonly called To obtain data, the broker simply highlights the "question logic" termed and the one shown in FIG. 1 through Pick up the hook and dial a four-digit block 24 is displayed. This question logic Code number that the goods in question 35 also receives via the return line 26 identified. After that, the broker will talk about the signals that represent the data that is already on Telephone handset a spoken message from until the drum 14 are stored, so z. B. Signals, to listen to 66 words, the individual data of the queried the already past state of the lines th goods, such as Display the last price, the opening 12. The question logic 24 compares that price and the number of allotments sold, 40 current state of each line 12 with its conveyed. . past state, as detailed below

Each line 12 is interrupted when the run, and brings the on the drum corresponding telephone receiver is on the cradle. saved data is up to date. Specifically, when the handset is lifted off the hook, the question logic determines whether a condition becomes the line closed to a circuit 45 change in a line 12

with a common, not shown earth pressure 1. is a pulse that has already been sampled,

line to complete. The voter signal starts 2. a new impulse is part of a partalso with the lifting of the handset from the cradle, wisely chosen digit forms, or

which closes the corresponding line 12. If 3. the first impulse of a series of impulses is the one

the voter mechanism is open and loose - represents 50 new digits, is left, the line is periodically opened and closed according to the number selected after this determination is activated. circuit or question-logic according to the question-while the voter is drawn up, arises between recording circles 28, so that the recording small the digits a long pause. When heads 22 new requested data to the appropriate one z. B. a participant dials the number 3721, begins to record 55 digits of the drum 14, the signal with a long end, followed by three The question signals are on eight tracks of the drum

brief interruptions, a long ending, mell4 accommodated. That part of the drum seven short interruptions, a long one that contains these traces, is used below as a question-ending, two short interruptions, called a long section. The drum 14 also includes Conclusion, a brief interruption and then a 60 control and address section and a continued long ending until the participant enters an answer section on which the answer (e.g. hangs. the requested security data) for transmission

The lines 12 are placed at the entrance of a still the inquiring participant. Circuit arrangement to be described switched according to FIG. 2, the drum 14 is longitudinal in 1024

which visits the voter impulses and divides the four running zones into one zone digit question signals on a magnetic drum 14 for each subscriber telephone 10. These zones are assembled. Each line 12 is a corresponding one of six columns, i. i.e., each zone contains of the area or segment on the drum trains- distributed over the circumference along a track space for

5 6

six binary digits. On the two address lanes, voter pulses in certain places on ent-30 are prerecorded binary numbers stored speaking positions in the question segment. This position (logical Zero and one), each corresponding oil count (DC) advances to the end of each intermediate zone identify. These address binary numbers place interruption before when the first voter becomes to an address registration device 32 5 pulse opens the line.

(Fig. 1), which are used for the main control of the The three binary numbers of digit counting begin Circuit 16 is used. The time impulses on the at 000. With the receipt of the first voter tracks 33 are sent to a timing circuit 34, impulses move the count to the first position 001 which is operated by conventional means, which is held while the pulse train, in order to develop suitable time keyings, which in the io represents the first data location in the area of the Arrangement for controlling the data processing first data point is collected, which is used as »thousands will. the «in the second column of the question segment

Because the lines 12 are drawn twice each time. With the first impulse of the second digit

rotation of the drum 14 is scanned, each advances the digit count to the second position 011,

six-column zone on the question section of FIG. 15 and the pulse train received thereafter is in the

Drum continues to accumulate in two three-column segments area of the second data location, which is called

divided. For example, zone # 0 contains questions- "hundreds" in the second column of the segment

segments for subscriber no. 0 and no. 512, etc. is designated. Then the number of digits moves up

It should be noted that each participant thus has two third position 101 and fourth position 111

has identical segments, as z. B. both zones No. 0 ao before the accumulation of the third and fourth

and no. 512 question segments for participants no. 0 digit in the lower column to the relevant

and no. 512 included. speaking passages beginning with "tens" and "one"

Simultaneously with the passage of a question- are designated to control.

segments for a given participant under the If the fourth data location completely together question headers 22 is set to the part 25 and the sample count has reached 7, the subscriber associated line 12 will answer the input question (e.g. the selected four-digit security line 18 switched to the line of the partial number) on a time memory 42 in a questioner to feel. At the same time the register 44 is running, whereby of course other question segment for the subscriber under which it is assumed that this memory is not already Question Readers 40 to the previous 30 contains a previous transmitted question. if the history of leading the participant to the participant inadvertently adding a fifth digit determine. The dials developed by the reading heads before the transfer to the question register Signals are scanned along with the can be done, the digit count advances to one current state of the line of question logic fifth position 110, which is an overwrite 24 is supplied, and the question logic then brings 35 to the fourth data position prevented if a the subscriber's question segment, which is then supplied to the question logic 24 under control signal. To passes through the recording heads, upon transferring the compiled question to the latest status. When the line of the subscriber question register 44 is the digit count to the sixth is unchanged in the previous scan, position 100 advanced as a control signal to it the question segment, which is then used under the orders 40, will indicate that the transmission has ended, heading through, with the other to repeat the transmission to ask segment of the participant, which among the obstacles. A dialing by the participant after Reading heads is made identical. (Even with the transmission of the selected data in the question, of course, the reading heads 40 are attached in such a way that the register does not change either the digit count or the that they have the previous state of the line of 45 recorded data.

The top column of the question segment also contains

recording heads scan for a certain period of time a binary number as a lock bit (IB), which as a logical

to carry out the necessary logical opera- one, the transmission of a response to the part

provisions.) Prevents the taker. This binary number is used every time

According to Fig. 3, each question segment consists of 50 when the participant hangs up, generated consequently,

24 magnetic spots or "binary numbers" that are usually used, e. B. every time

borrowed to be used to in binary form 1. the scanned line is open,

to represent individual information points. The upper 2nd is the binary number of the previous state open

Column on the right contains a binary number that shows and

outgoing state (PBS), which on a 55 3rd the count of the previous scan

a logical zero or a logical one indicates whether it is at 7.

the line of the subscriber during the previous deactivation The blocking bit is deactivated (logical zero),

key was open or closed. The three when an answer in the answer section of the drum

adjacent binary numbers represent the number of mel 14 compiled "is what the reception

previous scans (previous 60 follows a chosen question.

Scan Count PSC), in which the line If a subscriber hangs up, his line becomes

of the participant was unchanged. This counting keeps being sampled as open all the time, so the binary number

at 7, which serves to mark the end of the selected the previous state zero, the count of the

To mark the number. previous sample seven and the lock bit

On the left side of the top column put the 65 will be logical one. During this process will be

first three binary numbers the number of the selected digit counter (DC) and the digit memory fields

Represent and deliver signals to question logic 24 automatically back to zero and in one for one

to control the collection of the received further question ready state brought.

7 8

If the number of effects specified by the participant. If the output of this counter is selected which, on the question register memory 42 exceeds digit number d in the sections 50 and 50 / is Retragen, the address of the subscriber is likewise gister 50 corresponds to the data point, which then, if memory to a second is 46 in which the question passes under the reading heads, transferred from the first register 44. This address is used in the 5th stage on a shift register response buffer stage 66 sequence to transmit the response data to the response logic 48 to which it is assigned. As soon as this permanent participant should be addressed. Transfer is carried out, is carried out in the section

As soon as the question register 44 is completely filled with the 50 / stored number digit increased by one, question data and the address of the subscriber is occupied (by a conventional circuit for adding one, conventional means not shown become effective one), so that the address logic 62 the next sam, in order to transmit a signal to control a response digit on the drum 56 as soon as logic 48 designated circuit automatically to the sync pulse counter upon receipt of the generate and transmit. This circuit includes next timing pulse advances. This method continues a register 50 which contains six sections 50 a to until the number stored in register sections 50 d to 50 /, of which the first four are suitable, 15 50 / has increased by 100. The four selected digits in the question. At this point, all data that are stored in registers 44 pertaining to goods to be received are captured on the answer. If this register is at the time when the signal buffer stage 66 is transmitted.

is received is empty, the selected items are selected. As mentioned above, the effect data is in

Numerical digits on four sections 50 α to 50d above this system on the drum 56 from unification, and the other two sections are set to zero for technical reasons in the form of 4-bit numerical digits. At the same time, the address of the part is stored, as is also transferred to the address register 52 with other processing users. investments is usually made. However,

As soon as all the necessary query data are received, the device for generating audible antgisters 50 and 52 have been transmitted, the key words used in this system will be a tion is automatically activated to use a central 6-bit identifier for each "word" that is on Data processor 54 who uses a rotating magnet to transmit the subscriber's phone. For this storage drum 56 contains the requested data reason were to be retrieved in the response buffer stage 66, which the special effects, the saved data actually first in a ent by identified the participant. 30 speaking 6-bit code converted (by usual, The drum 56 may e.g. B. contain 200 tracks, means not shown), although of course, where each track recorded data of ten if the data drum and the output sections contains various effects. Use the data block for the same code, no conversion each commodity can be 100 decimal places long (eg is required. In the special, according to the Er-400 Binary digits), so that each track of the drum-finding arrangement consists of the longest mel contains 1000 decimal places. The data for each response from 66 output tags, which after Goods are stored in a fixed format converting 89 decimal places to the and, if required, are stored on the drum track by a data 100 digit part input device 58, e.g. B. a hand-operated are formed. Unused number typewriter keyboard 60, up to date 40 digits contained in the 100 digit data field brought. Code that translates into an "interruption".

The system is further arranged in such a way that, if a response is shorter than 66 identifiers, the numerical digits stored in register 50 contain the interruption code, the unneeded last sections release address for the response buffer stage retrieved from drum 56,
represent the data to be obtained. This system provides 45. Once the response buffer stage 66 is full, data from 2000 effects, and the selected numbers, the response data must be recorded on the response section assigned to these effects (for reasons of the drum 14, not in accordance with the invention belong), are arranged in a row in the room assigned to the participant making the exploration from 2000 to 3999. Thus, when the payment is made, it is assigned. If this answer-2758 is selected, the register 50 will contain the number 50 section contains 66 tracks, one for each digit comprising 275800, whereby a commodity which is word of maximum length and is located on track 75 is identified (the The first digit of each word represented by a 6-bit tag number 2 is considered a zero because it will be assigned in sequence along the track in the lowest first digit located in any commodity-speaking zone of the subscriber ). The data for this particular item 55. As will be explained below, the drum response beginning with digit number 800 around the device reads the response data at once and intercepts track 75 and extends to the digit number developing an audible reply word for every 900. If the If the selected number is 3756, the 6-bit identifier that is stored on the track, the desired effect data is stored on track 175 and these words are distributed to the relevant partial finds, which begin with the number of digits 600. 60 takers. With such an arrangement, the trigger address data in register 50 will pass flags of the effects data in the response accordingly to address logic 62 which is connected to a buffer stage 66 on the track of drum 14 which data processor 54 is connected to. Also, first of all scanned is accommodated, whereby this circuit arrangement hears the usual time impulses of each participant first the start word of the response from a synchronization track 64 on the drum 65 word message. The transmission of the response is supplied. These time pulses operate a characteristic of the drum 14 can be carried out by a convenient counter to determine the number of digits among the known means, and the special drum reading heads at any moment do not form part of the means used

Invention. The address of the subscriber stored in register 52 is used via conventional address blanking means, such as. As indicated by block 53, used to control the location of the response flags on ₍ , the zone from which the subscriber is requesting the data. This is achieved by only appropriately activating the reading or recording heads 70, when the special zone passes underneath.

The heads 70 for the response section on the drum 14 are also connected to the terminals of a step dial assembly 72 switched, whose common line 74 with the control circuit for the audio output circuit, referred to as output logic 76, is connected. (Actually used in commercial Devices of the switch 72 consist of an electronic circuit, but it is here called "step selector" referred to simply to emphasize the nature of its function.) The step selector 72 is used to do this, the 6-bit tags stored on the response tracks of the drum 14 to the output logic 76 to deliver, one track at a time. Simultaneously with the development of these response flag signals the subscriber addresses corresponding to each identifier are fed to the output logic 76 via the line 77. These two sets of signals are in appropriate registers, e.g. B. a number of magnetic cores that form a part the output logic form, stored, which serves as a multiple relay switching system to the simultaneous Distribution of spoken words recorded on a continuously rotating clay drum 78 are recorded again to control.

The drum 78 rotates once every 440 milliseconds, of which 400 milliseconds are dedicated to the reading of the prerecorded words (all starting at the same time), and the remaining 40 milliseconds are dead times or pauses. During the dead time, an end-of-word (EOW) signal is developed to convey the next set of 406-bit code signals from the response section on drum 14 to output logic 76. This is done by reading a complete track on the response section of the drum and transmitting this code signal together with the attached subscriber addresses to the preceding registers of the output logic. This transmission is completed during the 40 millisecond dead time, and for the following 400 milliseconds the sound readers 80 are turned on to select the subscriber's output lines 82 in accordance with the 6-bit code signals stored in the output logic. The circuitry in the output logic is fully adaptable so that any reading head 80 can be connected to any one or more output lines 82 according to particular message needs. The recording of the 6-bit response signals on the response section on the drum 14 is independent of the step selector 72 and, by recording the response, can take place rapidly during the 400 milisecond period of the word reading from the drum. The high-speed recording can be carried out by using a separate read-off recording chain for each track on the response section and by transferring the response data of the same name from the buffer stage 66 to the drum. To ensure that the first word of the message is placed on the track initially scanned by the step selector 72, the flags in the buffer stage 66 can be fed back by conventional means and placed in appropriate locations according to the track, which is then followed by the step switch is scanned, be pushed.

Claims (16)

Patent claims: 1. Arrangement for processing a number of pulsed stations from a number of remote stations incoming question signals for the purpose of obtaining response signals from data that z. B. on stock exchange transactions, securities or stock exchange prices relate and at a central station, which is connected to the remote stations are stored on storage devices such as magnetic drums and for generating response signals in the form of a series of separate data, where each such row corresponds to or is assigned to a question input signal, characterized in that that the signal transmission circuits (12) of the remote stations (10) are periodically scanned by a scanning device (16) and the scanning signals generated thereby are recorded in a memory arrangement (14) (question section) be that the scanning signals before they are recorded by a control circuit (question logic) (24) run on already in the Memory arrangement (question section) responds recorded scanning signals to a double Recording of the same sample signal during two consecutive samples of the Signal transmission circuits through the scanner to prevent the control circuit provided after the signal comparison between it and the memory arrangement Inquiry recording circuits (28) controls to the inquiry signals or scanning signals defined storage locations on the storage arrangement assigned to the requesting remote station (14) to record that the scanning device (16) each individual, on the signal transmission circuits (12) arriving The pulse of the request signal is scanned or determined at least once that switching means (44, 50) are provided which the query data recorded on the memory arrangement (14) a central data processing device (54) which receives the query data and generates output signals associated with this data that these output signals for Identification of the response signals belonging to the corresponding query signals are used and, coming from the data processing device, on the memory arrangement (14) (response section) are recorded, each output signal series corresponding to a respective interrogation signal which is stored in a memory section is stored, which is assigned to the requesting remote station (10) that scanning means (72) the relevant memory locations for all removed at high speed Scan stations in a fixed sequence and the scanned output signals generated in this way ■ logic output circuit (76) are fed 809570/62 the, which corresponding response signals in the form of a series of individual data parts to the lines (82) leading to the remote stations, each response signal of the corresponding is forwarded to the remote station from which the related question originated, and that the output circuit (76) periodically all the output lines (82) at high speed operated in such a way that no remote station has an appreciable time between the transmission of the recorded data parts needs to wait and that all remote stations are effectively supplied with response signals at the same time will. 2. Arrangement according to claim 1, characterized by magnetic drum storage (14), which synchronously rotate with the scanning of the input signals, recording heads (22) for recording the sampled signals on the drum (14) and data transmission circuits (40, 44, 48), which the signals recorded on the drum to the data processing device (54) transmitted after a complete input signal is assembled on the drum. 3. Arrangement according to claim 1, characterized by a data storage device (14, response section) which stores the data generated by the data processing device (54) and a plurality of individual memory fields (6 bits along the drum track) arranged in groups (zones 0 to 1023) comprises, data transmission means (66, 53) for transmitting each output signal to one of the corresponding memory field groups, the individual elements of the signal being stored in the individual fields and the second multiple circuit containing a sampling device (72) to sample the stored output signals in regular cycles, so that one field of each group is scanned during one cycle and the next field of each group is scanned during the following cycle. 4. Arrangement according to claim 3, characterized in that the data transmission devices Have control means (66) to establish the output signals in the memories, wherein the first signal element, which is defined in a memory field, directly by the second multiple circuit (72, 76, 78) is scanned. 5. Arrangement according to claim 1, characterized in that the remote stations from There are voter telephones (10) that generate groups of dialing pulses that have a particular Represent demand for the current state of certain data, and that main storage facilities (58) in the central station for storing the current status of a multitude of details (stock market prices) are provided which are to be demanded by the remote stations are selectable, and that the data processing device (54) with the main memory devices is operational to the output signals according to the current state of the selected Generate details. 6. Arrangement according to claim 1, characterized in that the second multiple circuit Has sound memory (78) which contain a series of information or words, and that Switching means (72, 76) for the compilation of the response signals in the form of groups of Words according to the output signals and for feeding the selected words to the output circuits (82) are provided. 7. Arrangement according to claim 6, characterized in that the sound memory consists of a rotating drum (78) or disk, which has a plurality of closed tracks, each track having a corresponding word recorded thereon, so that on the Drum track lies that all the words said during a particular part of the revolution Drum or disc can be played. 8. Arrangement according to claim 7, characterized in that the data processing device (54) contains a data memory (56) for storing the output signals and that Switches (72) responsive to the output signals for controlling the distribution of the words to the output circuits (82) are provided. 9. Arrangement according to claim 8, characterized in that the switches by the output signals triggered during part of the rotation of the sound storage drum (78) when no words are being played back. 10. Arrangement according to claim 1, characterized by a first recording memory section (Inquiry section) on the drum (14) which is arranged to be relatively movable with respect to first recording heads (22) and is suitable, store the scanning signals by a second recording storage section (response section) on the drum (14) relatively movable with respect to second recording heads (70) is set up and stores the output signals, drive means for moving the first and second memory sections in synchronism such that a given memory area of the first memory section a predetermined physical relationship to a given one Maintains storage area of the second memory section, each set of output signals for a given remote station (10) is stored in a location corresponding to the scanned Signals received from the remote station. 11. The arrangement according to claim 10, characterized in that the first and second storage sections (Question section, answer section) are rotating magnetic storage devices. 12. The arrangement according to claim 11, characterized in that the first and second storage sections each section is on the rotating drum (14). 13. Arrangement according to claim 13, characterized by a switching control device (24, 28), with which the scanned query signals in predetermined columns on the drum (14) according to the remote station from which the query message was received will. 14. Arrangement according to claim 13, characterized by an electronic switching device (16), which with the rotation of the drum for scanning the individual signal transmission circuits (12) is synchronized in rapid succession to existing on the signal transmission circuits To determine signal pulses. 15. Arrangement according to claim 14, characterized by address memory or tracks (33) with a set of address signals regularly recorded on the drum (14) and scanned in synchronism with the drum rotation, and an address registration device (32), which respond to the address signals for controlling the switch device (16). 16. The arrangement according to claim 15, characterized by switching devices (77) for Transfer of signals to the second multiple circuit (72, 76, 78) in accordance with the generated Address signals to the remote stations (10) corresponding to each set of output signals to identify. Considered publications:
German Patent No. 888,268;
German Auslegeschrift No. 1011178;
"SEG-Nachrichten", 1957, no. 1, pp. 25 to 29. 1 sheet of drawings 809 570/62 7.68 © Bundesdruckerei Berlin