DE2034836A1 - Storage arrangement for digital information - Google Patents

Description

Hectiingen, July 10, 1970 Soh / s

Applicant: Dipl.-Ing. Walter Buhmann

Elektro-Apparatebau GmbH. 7451 Stetten near Hechingen Zollerstrasse 338

Official file number; New registration file number d. Applicant: 1 / 7U '

Storage arrangement for digital information

The invention relates to a memory arrangement for digital Information with one that contains information in serial Form-receiving, tape-shaped recording medium, the by means of a step drive in each operating phase by a section of tape comprising a character past a S0hreib- / Readehopf, which is switched on during this phase ** is feasible, and which has scannable markings for monitoring the tape movement.

In the storage of digital information on a g Oberflächenspeioher, for example, on a magnetic tape, which is determined by the respective coding bits can be a character either parallel form are recorded in a plurality of tracks of the record carrier simultaneously or in serial form in a single track of the recording medium, while the Parallel recording is mainly used in tape storage in data processing systems, serial recording is used because of its greater technical simplicity in so-called input-output devices, in which the interaction with a slower device, for example a typewriter, reduces the operating speed of the serial

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eller recording working memory can be accepted without disadvantage · With such devices, a step drive is required for the advance of the usually tape-shaped recording medium, by means of which the recording medium in an area which is large enough to contain all bits of a character including any test bits, is effiirted past a read / write head at constant speed. The entire switching step consists of a start-up phase, the operating phase at constant speed and a braking phase. Since the recording medium cannot be used in these areas because of the fluctuating transport speeds in the start-up phase and in the braking phase, the use of memory in deir-like devices is approximately 50 % in the most favorable case. The resulting disadvantage is increased by the fact that the storage capacity of these devices is not very large due to the use of recording media of limited length.

The object of the invention is to ₀ provide a storage arrangement in which a simple and at the same time exact Schrittsteuemng substantially better utilization of the given storage capacity achieved eiae

According to the invention, this TBEI is an arrangement of the type mentioned achieved that the _g for the control of the step drive ₅ - together are not long whose start · = and braking phases than that. Operating _{phase s} in a track arranged markings and the spaces between the markings each have the length of the tape section comprising a character, and that the scanning signals of the marking track of a control device can be filled _P by which for optional processing iron two "nested in a track" information sequences either the Markie "

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Rungs corresponding tape sections or the spaces between the markings corresponding to the tape sections for the operating phases can be selected.

The control device advantageously has the purpose of generating output signals during the operating phases the selected information sequence has an AND element, whose first input mil; connected to the writing / reading head is, and its second input under the control of a toggle switch either by the during the scanning of a Marking generated signal or by the via an inverter

while scanning a space between two markings gen generated signal is prepared

Furthermore, the control device has switching elements which by the disappearance of the control signal present during each operating phase, the braking device of the belt drive can be operated.

The arrangement according to the invention is designed with respect to its step drive in an advantageous and particularly simple manner, so that the phase at the start-up and the braking phase of a switching step transported tape sections have the same length, and that these lengths taken together, equal the like the length of the transported in an operating phase band section are·

An advantageous embodiment of the arrangement consists in that the scannable marking track is formed on the recording medium by a hole track, the holes Have longitudinal edges perpendicular to the direction of transport and their edges running in the direction of transport, as well as the spaces between the perforations correspond to the length of a section of tape for receiving a character.

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BAD ORlQiNAL

It is also advantageous that an optical scanning device is used to scan the perforations of the perforated track arranged on the tape is provided in which a light beam generated by a light source by reflection in the area of a Perforation can be fed to a photo element.

A particular advantage is achieved in that the Reflection surface of the scanning device for reflecting the scanning light beam in the area of a perforation through the cylindrical Surface of a tape guide roller is formed. With this arrangement, the photo element of the scanning device is applied only a narrow strip of light parallel to the long edge of the perforations is shown. This will be achieved sharp signal edges of the scanning signal. It is also advantageous that the scanning device in the transport direction is arranged inclined at a small angle to the surface normal of the tape. This will cause any annoying reflections of the strip surface in the photo element avoided

An advantage of the device according to the invention will continue to be seen in that the recording medium formed by a magnetic tape is accommodated in a cassette which when inserted into the device using the memory arrangement with the read / write head, the scanning device and the stepper drive can be brought into engagement.

The invention is described on the basis of an exemplary embodiment illustrated by the drawings. Show it, each in a schematic representation:

1 shows the essential parts of the memory arrangement in a diagrammatic view,

2 shows the optical one used in the memory arrangement Scanning device for generating control signals, in a first embodiment,

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Pig.3 another embodiment of the optical Scanning device,

4 shows a diagram to explain the arrangement of the Information areas in a track of the recording medium with reference to that on this attached, optically scannable markings, the resulting control signals and the movements of the recording tape and.

■ 5 shows the circuit diagram of the control device for the band _like movement and the selection of a track. ™ of the information carrier contained information sequences.

In the embodiment of the memory arrangement described, a magnetic tape 11, which is designed as a wide web and can accommodate a large number of parallel recording tracks 12, serves as the recording medium, as shown in FIG. The magnetic tape can be wound back and forth between the supply rolls 15, 16 mounted on the axles 13, 14. The tape is driven in the processing direction by the continuously rotating motor 17, which can be brought into engagement with the axis 13 of the take-up roll 15 by means of the controllable magnetic coupling 18 and the controllable magnetic brake 19. Further means, not shown, serve to rewind the processing tape and to maintain the tape tension. The magnetic tape 11 is accommodated together with the two supply rolls 15, 16 in an exchangeable cassette, the housing of which is indicated by the dash-dotted line 20. When the cassette is inserted into the device using the storage arrangement, for example into a correspondence machine, the roller axle 13 automatically engages with the drive axle 22 via a claw coupling indicated by the dashed connection 21.

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BATH ORIGINAL

The magnetic tape 11 runs between the storage rollers 15, 16 on the guide rollers 23, 24 to ensure flatness the belt area in the processing area in which the Write b / read head 25 is arranged. The one as a multiple magnetic head trained write / I> esekopf 25 is by means of the dash-dotted line 26 indicated in a recording (not shown) guide attached, through which it can be moved perpendicular to the belt surface and transversely by displacement to the tape running direction on the individual recording tracks 12 of the tape is adjustable.

To control the information processing and the tape movement, a track 27 is on the magnetic tape 11 with in uniform Optically scannable markings which are arranged at intervals and which are designed as rectangular perforations 28 in the exemplary embodiment described. To the The scanning device 29, which is arranged above the guide roller 24, is provided for scanning the perforations 28 of the track 27 is. The cylindrical surface of the guide roller 24 serves as a reflection surface for the scanning light beam.

A suitable scanning device is shown in FIG. A light beam generated by the light source 30 passes through the condenser lens 31 and the semitransparent mirror 32 and hits the surface of the guide roller 14 if there is a perforation 32 reflects and passes from there through the lens 33 to the photo element 34. The _f narrow light strip imaged by the lens 33 on the plane of the photo element 34 is parallel to the longitudinal edge of the perforation 28. This has the consequence that the edges of the Perforations 28 produce very sharp light-dark transitions when the scanning device 29 is running durably. The axis of the scanning light beam

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C. <I <1

is at the scanning device 29 by a small angle oC pivoted relative to the normal on the plane of the magnetic tape. Any disturbing reflections from the surface of the magnetic tape are thereby avoided. .

Fig. 3 shows another usable scanning device. _In: this embodiment, the outgoing from the light source 30 light beam on the condenser lens 31 meet at an angle on to the surface of the guide roller fourteenth The objective 33 and the photo element 34 are arranged in the direction of the reflected beam. All optical elements are seen in a j through the center of the guide roller plane passing · I

The digital information is on the magnetic tape 11 iii recorded in serial form, i.e., the individual, by

each encoding of a character certain bits are arranged one behind the other in a recording track \. \ For the entry of a character, a certain section of the tape is required, the length of which is given by the total number of bits of a character including any : check bits and by tolerance ranges at the ends of the section.AJLIe, in each case the bits for a character are information sections the same length · There to. "'" Processing of the information contained in these sections, the band tion movement when passing a such a waste - must be a constant speed section at the magnetic head 25, on the other hand it must be possible but that. To stop tape movement after each character by means of the clutch 18 and the brake 19 and to start again, the information sections are separated from one another by spaces, which are composed of a section for the braking phase and a section for the start-up phase;

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ORIGINAL BATHROOM

- ⁸ - 2014836

These relationships are shown in Fig. 4 in line ä. There are 12 of the startup phase for a Aufzeichnuhgsspur corresponding sections with A, the sections corresponding to the operating phase with B and those corresponding to the braking phase Sections marked with G «As from Fig« 4, line a, can be seen, the elements controlling the start-stop operation, in particular the clutch 18 and the brake 19 »see above set up that the areas A and O for the start-up and Braking phase are the same length and, taken together, correspond to the length of an information section B. For example the sections A, G are each 0.5 mm long, while the Sections B have a length of 1 mm.

The one in Fig. 4 »line b, with reference to the information sections B of the track 12 perforations 26 shown in the direction of movement of the tape edges 35 »that length corresponds exactly to the length of the information sections B. Likewise, the intermediate spaces 36 correspond between two adjacent ones Holes 28 the length of each from your run-up section A and the braking section G formed. Sections.

As already mentioned, the perforated track 27 serves to control the "writing in" and reading out of information as well as the movement of the tape. The scanning device 29 arranged above the guide roller 24 generates scanning signals when scanning the perforations 28, the shape and phase position of which is shown with respect to the perforations 29 in FIG. 4, line c from the "0" level to the "1" level, and vice versa, the signal edge 38 generated when the trailing edge of the hole is passed over corresponds to a transition of the signal from the "1" level to the "0" level.

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- y -

The scanning signals are fed via the line 39 to the control device 40, which via the line 41 allows the read / write head 25 for the information sequences recorded in the sections B to become effective only in the area in which the scanning signal level is "1" . As a result, as can be seen from lines a and b in FIG Scanning the trailing edge of a perforation occurring signal edge 58, so that the braking phase can be initiated at the end of each information section B, after which the tape stops at the end of section C. With a start signal on the inputs of the clutch 18 and the brake 19, the belt can now be set in motion again. It goes through the start-up phase A and when the scanning device 29 passes over the next leading edge of a perforation 28, it has reached its full speed again. The course of the belt speed according to this control is shown in a greatly simplified manner in FIG. 4, line d. The areas A correspond to the sections 43 with increasing speed, the areas B correspond to the sections 44 with uniform speed, and g to the areas C correspond to the sections 45 with decreasing speed. The stop points 46 of the belt correspond to the boundary lines between the areas A and C.

In the track 12 of the magnetic tape, a further information sequence is marked, the information ^{sections B 1 of which are arranged} exactly in the sections 0, A of the track 12 which cannot be used by the first information sequence (FIG. 4 »line a). Correspondingly, the start-up phase ^{sections A 1} and the braking ^{phase sections C 1 of} this information sequence lie in the sections B of the first information sequence. The course of the belt movement for this case is shown in Fig. 4 »line e,

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EADOWQiNAL

posed. The starting and braking sections 43 'and 45' are located opposed to section 44 at a uniform speed, and conversely, section 44 'lies opposite the sections 43 and 45 opposite. The stop positions 46 * are in the Middle of sections 44. This second series of information too is with the help of the holes 28 in cooperation with the Scanning device 29 and the control device 40 are written in or read out.

The input of the control device 40 connected to the read / write head 25 via the line 41 is via the amplifier 47 and the pulse shaper 48 to the input 49 of the AND gate 50 supplied. The input of the control device connected to the photo element 34 of the scanning device via the line 39 40 is via the amplifier 51 and the pulse shaper 52 with an input of the AND-G-Iiedes 53 and via the Inverter 54 connected to one input of AND gate 55. The outputs of the AND gates 53 and 55 form via the OR gate 56 the second input 57 of the AND element 50.

Is now the AND gate by a control signal at input 58 prepared, when the "1" signal occurs, the scanning device at input 39 also prepares the AND element 50, so that during the passage of the perforation 29 the information section B corresponding signals from the magnetic head 25 reach the output 59 of the control device via the AND element 50. The signal from the scanner disappears when the trailing edge of the perforation is passed over, the AND gate 50 is also blocked, so that no signals of the recording track can reach the signal output 59 of the control device.

On the other hand, if the information sequence B 'is to be processed, the AND gate 55 is prepared by a control signal at the input 60 of the control device. Because this AND element

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connected to the defeat signal input 39 via the inverter 54 is, it provides a "!" output when the scan signal is at the "O" level. This will in this lalle the AND gate 50 via the input 57 in those areas prepared that the space between two loohungen 28 correspond. The signals from the writing / reading head 25 arrive thus in areas B * to output 59 of the control device and are ineffective in the other areas A *, GV »

Be advertising supplied at the end of each information region on the line 42 of the clutch 18 and the brake 19 the corresponding control signals, the dee for stopping the belt drive I the can over by the dashed lines indicated ^l switching elements 61 at the output of the OR gate 56 abgenoaaen .

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Claims (9)

Hechingen, July 10, 1970 See / s Applicant Dipl.-Ing »Walter'Buhmann Elektro-Apparatebau G-mbH *. 7451 Stetten near Hechingen Zollerstrasse 338 Official file number Hay registration file number d. Applicant: 1/70 Patents claims Storage arrangement for digital information with a "tape-shaped recording medium receiving the information in serial form, which can be guided by a step drive (in each case in an operating phase around a" one character containing band section on a read / write head which is switched on during this "phase) and which has scannable markings for monitoring the belt movement, characterized in that the one for controlling the stepper drive (17-19, 21 ₉ 22), its start-up (43 or 43 ') and braking phase (45 or «, 45" ) together are no longer than the operating phase (44 or 44 ') »markings (28) arranged in a track (27) of the belt (11) and the spaces (36) of the markings (28) each have the length' (35) of the tape section (B or B ') comprising a character, and that the scanning signals (37, 38) of the marking track (27) can be fed to a control device (40), by means of which for the optional processing of two, in one track ( 12) nested information sequences either the tape sections (B) corresponding to the markings (28) or those corresponding to the spaces (36) of the markings. 109884/1566 the belt sections (B ¹ ) can be selected for the operating phases. ' 2. Arrangement according to claim 1, characterized in that the control device (40) for generating output signals during the operating phases of the respectively selected information sequence (B or B ¹ ) has an AND element (50) whose first input (49) with the read / write head (25) is connected, and its second input (57) under the control of a changeover switch (53, 55, 56) either by the signal generated during the scanning of a marking (28) or by the signal generated by an inverter ( 54) signal generated during the scanning of a space (36) between two markings is prepared. 3. Arrangement according to claims 1 and 2, characterized in that that the control device (40) has switching elements (61) via which the disappearance of the * the braking device (18, 19) of the belt drive is present during the duration of each operating phase is actuatable. β Arrangement according to claims 1 to 3, characterized in that the step drive (17-19, 21, 22) of the belt (11) is designed in such a way that the in the run-up phase (43 or 43 *) and the braking phase (45 or, 45 *) of a switching step transported belt sections (A or A ^1. C or C ^f ) have the same length, and that these lengths, taken together, equal to the length of the belt section transported in an operating phase (B or B «) are. 5. Arrangement according to claims 1 to 4, characterized in that that the scannable marking track (27) on the recording medium (11) formed by a hole track 109884/1566 det, whose perforations (28) have longitudinal chambers perpendicular to the transport direction and whose edges (35) running in the transport direction, as well as the spaces between the perforations (36), correspond to the length of a band section (B baw. B ^s ) for receiving a character » 6. Arrangement according to claims 1 to 5 »characterized in that that for scanning the Xiochungen (28) of the hole track (27) arranged on the tape, an optical scanning device (29) is provided in which a light beam generated by a light source (30) passes through Reflection in the area of a locality of a photo element (34) can be supplied » 7 · Arrangement according to claims 1 to 6 "characterized in that that the reflective surface of the scanning device for reflecting the scanning light beam in the area a Loohung (28) through the cylindrical surface a tape guide roller (H) is formed. 8. Arrangement according to claims 1 to 7, characterized in that the scanning device (29) in the transport direction is arranged inclined by a small angle (o () to the surface normal of the belt (11). 9. Arrangement according to claims 1 to 8, characterized in that the recording medium formed by a magnetic tape (11) is housed in a cassette (12), which when inserted into the storage arrangement using device with the read / write head (25) of the scanning device (29) and the stepper drive (17-19, 21, 22) can be brought into engagement » •1 AS- Blank page