EP0160065A1 - Enregistreurs a cassettes multiples - Google Patents

Enregistreurs a cassettes multiples

Info

Publication number
EP0160065A1
EP0160065A1 EP19840903971 EP84903971A EP0160065A1 EP 0160065 A1 EP0160065 A1 EP 0160065A1 EP 19840903971 EP19840903971 EP 19840903971 EP 84903971 A EP84903971 A EP 84903971A EP 0160065 A1 EP0160065 A1 EP 0160065A1
Authority
EP
European Patent Office
Prior art keywords
tape
cassette
cassettes
carriage
head assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19840903971
Other languages
German (de)
English (en)
Inventor
Terence Walter Daniel Murphy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MADSU UK Ltd
Original Assignee
MADSU UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB838328327A external-priority patent/GB8328327D0/en
Priority claimed from GB838330786A external-priority patent/GB8330786D0/en
Priority claimed from GB848410857A external-priority patent/GB8410857D0/en
Priority claimed from GB848410856A external-priority patent/GB8410856D0/en
Application filed by MADSU UK Ltd filed Critical MADSU UK Ltd
Publication of EP0160065A1 publication Critical patent/EP0160065A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/68—Automatic cassette changing arrangements; automatic tape changing arrangements
    • G11B15/682—Automatic cassette changing arrangements; automatic tape changing arrangements with fixed magazines having fixed cassette storage cells, e.g. in racks
    • G11B15/683—Automatic cassette changing arrangements; automatic tape changing arrangements with fixed magazines having fixed cassette storage cells, e.g. in racks wherein the recorder or player is moved according to the location of a selected cassette

Definitions

  • the present invention relates to tape cassette machines.
  • this invention relates both to tape cassette machines which can be used for playing of magnetically recorded audio or computer tapes, and also to tape cassette machines which can be used for recording and playing of such tapes.
  • Machines for driving a tape material past a tape head are well known, particularly those where the tape is housed in a cassette.
  • the usual procedure is for a chosen cassette to be loaded in to the machine when required.
  • the cassette then has to be unloaded after recording and/or playing, so that the next cassette can be loaded.
  • This need for loading and unloading applies both to audio and to computer tapes, and more generally to other cassette-based systems including video cassettes.
  • a tape cassette machine comprising an array of cassettes, a movable carriage which carries a tape head assembly for movement of the tape head asssembly to any selected cassette in the array and which also carries a cassette engagement means for engagement of the selected cassette to bring the tape of the selected cassette in to operative association with the tape head assembly, and tape drive means which includes an extended capstan passing through one or more bearings on the carriage and extending the length of the array of cassettes, whereby the tape head assembly and cassettes are selectably movable relative to one another to bring together the tape head assembly and the tape of any selected one of the cassettes in the array, such that the tape head assembly can play back from and/or record on to the selected one of the cassettes.
  • a tape cassette machine of the present invention can be loaded with an array of chosen cassettes, and the tape head assembly brought in to operative conjunction with the selected cassettes in any desired sequence, thereby avoiding the need for repeated loading and unloading. It is readily arranged that the extended capstan engages the tape of the selected cassette to drive the tape past the tape head, either to give an output which can then be amplified or otherwise further processed, or to receive an input for recording on to the tape.
  • cassettes in the array there will be at least 3 cassettes in the array, with the number of cassettes preferably being a multiple of 5_ More preferably the number of cassettes
  • OMPI is between 10 and 200.
  • the cassettes are arranged in a one-dimensional array forming a bank of 5 cassettes extending, for example, along the machine.
  • a particularly preferred arrangement for the cassettes comprises a bank of the cassettes stacked side-by-side with their major faces adjacent.
  • cassettes can be used in the tape ' - 0 cassette machines of this invention.
  • the cassettes preferably house tape coated with magnetizable particles and suited for carrying audio and/or data signals.
  • the tape can for example be* arranged in a reel-to-reel configuration, but currently an endless-loop
  • cassettes are also part of this invention and can readily be made of relatively small size. Without being restricted to such dimensions, typical
  • 25 cassettes of this invention might be as small as about 1 inch (say 2.5 cm) long by about 0.5 inch (say 1.3 cm) tall by about 0.075 inch (say 0.2 cm) thick, thereby permitting a large number of the cassettes of this invention to be assembled as an array in a tape cassette
  • Preferred sizes for the machines of this invention are a length and width each up to about 15 inches (say about 40 cm) and a depth up to 6 inches (say 15 cm), with a typical example being a machine which is about 6 inches (say 15 cm) long, about 4 inches (say 10 cm) wide and about 1.5 inches deep (say 4 cm).
  • the audio machines of the invention are preferably used with earphones, but one or more built-in loudspeakers is also possible.
  • a self-sufficient power supply such as one or more batteries can also be included in the machine.
  • portability is not needed and indeed large stationary machines can provide for high capacity storage of data or a great number of audio cassettes.
  • the tape machines of this invention can be built with various kinds of tape head assembly.
  • a machine with a tape head arranged only for play back is particularly suited for the playing of music, while for more general use a play/record tape head is preferred, particularly an assembly comprising a play/record tape head with associated erase head for use when recording on to the tape.
  • the relative movement of the tape head assembly and selected cassette is a combination of movement of the tape head assembly on the movable carriage to a position adjacent the selected cassette, and local relative movement of the selected cassette to bring the tape of the selected cassette into operative contact with the tape head assembly.
  • the movement of the carriage and thus of the tape head assembly can be achieved for instance with drive means providing for indexed (notionally stepwise) movement of the tape head assembly relative to the cassettes.
  • the tape head assembly can be mounted on a carriage movable along one or preferably two or more supports so as to traverse a bank of cassettes forming a one-dimensional cassette array.
  • the trackways can then be conveniently carried on one of the supports.
  • the contacts can take the form of simple sprung metal blades bearing on a respective trackway.
  • the arrival of the head at the selected cassette leads to local relative movement of the selected cassette using, for example, a cassette engagement means.
  • the carriage can be driven by a motor carried on the carriage, but it is greatly preferred to use a remote drive mechanism.
  • preferred drive mechanisms include a lead screw cooperating with an internally threaded surface of the carriage, a drive cord extending from a driven drum, and other arrangements including those currently used for indexed movement of printing heads and like movable objects.
  • a stop can be moved in to the path of the carriage at the position of the selected cassete: on reaching the selected cassette the stop acts to prevent further travelling of the carriage.
  • the arrival of the carriage can be detected for example by an over-run device, and the carriage motor stopped and the next stage automatically begun.
  • the machine can be constructed to allow multiple selections such that the carriage moves in turn to each of a series of selected cassettes.
  • a lead screw drives the carriage and is held in position longitudinally at each end by biased end mountings, such as leaf-springs, which resist inertia in the carriage when it starts moving or friction when it is being driven.
  • biased end mountings such as leaf-springs
  • the lead screw continues rotating to deflect the biased end mounting at one end. This deflection can then be utilised to trip a switch or otherwise indicate arrival of the carriage at the selected cassette. with the subsequent functions arranged to disconnect power to the carriage drive motor.
  • a drive arrangement for the carriage is a drive cord.
  • the drive cord feed drum can be attached to one member of a differential gear assembly, and a second member of the differential directly connected to the drive motor. Restriction of motion of the third member of the differential causes the cord drum to rotate and thus move the carriage. When movement of the carriage is impeded by the appropriate stop the third gear member is forced to rotate against whatever device is restricting its rotation. For instance, a spring centred arm directly attached to the shaft can be used to actuate the next operation. By this arrangement therefore the same drive motor can be used to power both the carriage drive and other mechanisms.
  • the secondary motion of the third gear member need be used only to trip by a switch a separate motor drive.
  • the carriage includes a cassette engagement mechanism which for example can be actuated by the over-run detector or in some other way when the selected cassette is reached.
  • a preferred cassette engagement mechanism operates to engage with the selected cassette and pull the cassette in to the carriage or otherwise ensure that the tape is presented to the tape head.
  • the cassette engagement mechanism is preferably movable between an operative position where a selected cassette 0 is presented to the tape head, and a null position where the cassette is returned to a position which is remote from the tape head and which allows the carriage to traverse along the array of cassettes.
  • the cassettes themselves are preferably biased to the null position.
  • the cassette engagement mechanism can comprise a pair of opposed engagement members arranged to engage the selected cassette at its sides.
  • the cassettes of this invention can include cooperating surfaces dimensioned and arranged to cooperate with the t - * engagement members of the cassette engagement mechanism.
  • the cassette cooperating members can include an abutment face providing a bearing surface on. which the engagement members can bear when pulling in the selected cassette.
  • the 5 cooperating members can be notches or other forms of recess at the sides of each cassette. In the array of cassettes, such recesses can be aligned, thereby forming continuous pathways along which the engagement members can travel while the engagement mechanism is in the advanced position.
  • Actuation of the cassette engagement mechanism can be achieved using a driven actuator provided locally adjacent the tape head assembly, but it is preferred to use a remote drive.
  • the cassette engagement mechanism is suitably actuated mechanically by an actuator shaft.
  • OMPI extending parallel to the direction of travel of the carriage and passing through the carriage.
  • a non-symmetrical shaft such as a square or hexagonal shaft, can be used. In this general way, the need for mechanism to be present on the carriage is reduced and the possibility of sharing motor power with other mechanisms functioning in sequence is made available.
  • the machine also includes an extended capstan for engagement with the tape at the drive window of cassettes when selected.
  • the drive motor for the capstan can be carried on the carriage, but it is greatly preferred not to carry the capstan drive motor on the carriage.
  • the drive motor capstan can be mounted separately with a flywheel, and the capstan bearings on the carriage can be placed close to the tape head assembly and adequately supported.
  • capstan support bearings incorporated into the moving carriage maintains a condition of concentric rotation at the point of interface with the tape cassette, thus minimising wow and flutter and also minimising side loading on the end support bearings. Furthermore, the casette need be moved only a short distance away from the capstan to disengage the tape drive and permit the tape head assembly to traverse across the face of a series of cassettes constituting the array.
  • An array of selection devices or other selection means is preferably provided for use by the user to indicate the selected cassette and initiate the appropriate relative movement of the head and cassettes.
  • the selection means typically includes a bank of selection
  • OMPI devices based either on one switch for each cassette or a reduced number of selection devices for use in combination to indicate selection of a given cassette.
  • the present patent application further provides as a separate invention a matrix of switches comprising:
  • second switch means comprising two or more switches each individually operable
  • operation of the first switch means moves to a contactable position a shaft contact in each set of such contacts and operation of a given switch effects contact between a switch contact of the said switch and a contactable shaft contact.
  • the first switch means rotates the shaft until a selected contact in each set of shaft contacts is in a contactable position, and a given switch of the second switch means moves its contacts in a mutually contactable position, the result being that one of the shaft contacts is operably contacted by one of the switch contacts.
  • the switch matrix can be electrical and/or mechanical in operation.
  • electrical isolation of each shaft contact and/or each switch contact will usually be needed.
  • movement upon making contact can be utilized to effect switching: for example, the engagement between contacts can be used to move a given one of an array of pins from an inactive to an active position or vice versa.
  • the tape cassette machines of this invention preferably include actuating means which upon selection of a cassette actuate any necessary relative movement of the tape head assembly and selected cassette and actuate the tape drive means. At the end of play of the selected cassette, it can then be arranged that the sequence is repeated for other selected cassettes.
  • an end of tape detector can be provided at or near the tape head.
  • a suitable detector comprises a pair of spaced contacts positioned to touch the tape when the tape head is in use. Normally the circuit across the contacts remains broken, but inclusion of a length of conducting tape at the end of the tape results in the circuit being completed. In this way the automatic operation of the machine can be facilitated. other methods for detecting the end of tape condition can be used.
  • Figure 1 is a schematic perspective of a tape cassette machine according to the present invention, with part of the cassette selection means removed as an aid to clarity;
  • Figure 2 is a schematic side elevation of the machine of Figure 1, but with a cassette pulled down for play;
  • Figure 3, 4, 5 and 6 form a series of schematic views of a carriage of the machine of the previous figures;
  • Figure 7 is a schematic front elevation of the machine of the previous figures and including the cassette selection means removed in Figure 1;
  • Figure 8 is a schematic detail of part of Figure 7.
  • Figure 9 is a schematic part circuit diagram for the machine of the previous figures.
  • Figure 10 is a schematic side view of a cassette according to this invention and suited for use in the machine of the previous figures.
  • a tape cassette machine 10 of the present invention for the playing of pre-recorded audio cassettes 12 includes an array 14 of 30 of the cassettes and a carriage 16 carrying a play back head 18. The carriage 16 and thus the head 18 is movable to any selected one of the cassettes 12 in the array 14. A cassette engagement
  • ' mechanism 20 on the carriage 16 then operates to pull the selected cassette in to the head 18 so that it may be read.
  • An extended capstan 22 driven by motor 24 through flywheel 26 cooperates with a pinch wheel 28 in the selected cassette to drive the tape 30 past the head 18.
  • the output from the head 18 can then be amplified and taken through earphones or other equipment, as desired.
  • the carriage 16 is supported by two parallel guide rails 32 which extend between end plates 34 of a chassis 36.
  • a selection means 38 is provided on the machines and includes a set of stop pins 48 mounted in a rack 49 positioned beneath the guide rails 32 and beneath the path of travel of the carriage 16.
  • the selection means is shown in Figures 7 and 8 and extends the length of the chassis. It comprises a set of six push buttons which can be operated to cause any one of the series of stop pins 48 to move into an extended position beneath the carriage 16.
  • the selection means has an encoding shaft 39 which is hexagonal in cross section. Its functional length is selected with regard to the total length of the array of thirty cassettes and their individual select pins 48.
  • the encoder shaft 39 is mounted in trunnions to allow it to rotate and at one end is positioned a ratchet mechanism 41 actuated by the first 43 of the six buttons. This ratchet/push button arrangement holds the encoder shaft and permits it to rotate one sixth of a revolution or 60° for a single actuation of the button. Repeated actuation of the button 43 causes the shaft 39 to rotate in a succession of 60° increments.
  • the encoder shaft is divided into five equal sections each the length of six of the cassettes in the array.
  • a projection 45 from the shaft At a position directly opposite the first cassette there is a projection 45 from the shaft, its width being the same as a single cassette thickness. Typically, it has a cross-section of an equilateral triangle with its base dimension equal to the width of the flat of the hexagon of the encoder shaft.
  • the second projection is located on the next flat surface of the hexagonal shaft, that is it is displaced by 60° relative to the first one.
  • the third projection is displaced from the second by 60° on the next flat of the shaft, and so on for each of the total of thirty projections.
  • first, seventh, thirteenth, nineteenth and twenty-fifth projections are spaced along the same flat of the hexagonal shaft as are the second. eighth, fourteenth, twentieth and twenty-sixth spaced along the next flat of the shaft 60° away. And so on similarly for the rest of the projections.
  • each button 47 Mounted above each set of six projections is a push button 47 of similar configuration to that employed to actuate the ratchet.
  • Projecting downward from each button stem is a set of six spring pin actuating leafs 53 with angled end contact points 55 positioned in close proximity to the projections 45 of the encoder shaft.
  • the actuation of one of the buttons 47 in a direction toward the shaft results in deflection of one of the six leafs, in particular the one which happens to coincide with the projection in closest juxtaposition. In this instance the leaf is deflected toward the respective pin 48 thus moving it into the active position.
  • the other five projections, relative to the leaf of each button are at least 60° away and thus do not move the other leafs. To make a selection therefore requires that the first button 43 be repeatedly depressed until the hexagonal face of the encoder shaft presents the appropriate projections towards the buttons leafs, such that subsequent depression of one of the five buttons 47 causes the required leaf to deflect and move the appropriate pin.
  • a list of selections can be displayed with the list arranged in six horizontal rows each of five selections. Each of the six rows would relate to one of the flats of the encoder shaft and each of the five columns relates to one of the five other buttons.
  • each of the hexagon flats of the encoder shaft By arranging each of the hexagon flats of the encoder shaft to switch an indicator LED light through a respective electrical contact 51. the row selected can be displayed alongside each row of selections. Depression of the ratchet button 43 results in LED indication of the row selected and subsequent depression of a second button 47 related to a column results in the appropriate individual pin being selected.
  • the encoder shaft need not be hexagonal in order to carry the sets of shaft contacts. Such sets can be arranged on shaft of other cross-section in greater or lesser numbers.
  • buttons can be held in the make position until depressed again.
  • the carriage 16 includes a main body 50 which has guide recesses 52 engaging with the guide rails 32.
  • _o_._p__ part of the cassette engagement mechanism 20 is vertically movable on the body 50 of the carriage 16 and is constrained by pins 56 on the body 50 cooperating with slots 58 in the casing.
  • a gear 60 carried on a square shaft 62 extending between the end plates 34.
  • the gear 60 meshes with a gear 64 which carries a lift pin 66 passing through an aperture 68 formed in the casing 54.
  • Rotation of the gear 64 by rotation of the shaft 62 results in reaction of the lift pin 66 against the part of the casing defining the aperture and thus movement of the casing against the action of a spring 67 from an advanced position to a retracted position, relative to the body 50.
  • the carriage body 50 has on its bottom face as shown in Figure 5 a pivot arm 70 horizontally pivotable between abutments 72 about pivot post 74.
  • the pivot arm 70 carries a depending pin 76 positioned to engage with a selected stop pin 48 in its extended position.
  • the bottom face of the carriage body 50 carries a sprung pivotable quadrant 78. while the bottom of the casing 54 includes a latch 80 of resilient material.
  • the latch 80 is shown in its disengaged position.
  • the latch 80 rides over the exposed corner 82 of the quadrant 78 to gain the engaged position of Figure 4.
  • the latch pivots the quadrant clockwise in the sense of Figure 4, such that the other corner 84 of the quadrant moves generally to the right. In so doing, this other quadrant corner 84 returns the extended stop pin 48 to its initial or inoperative position. Return of the stop pin 48 is achieved regardless of which of the two abutments 72 serves to restrain the pivot arm 70.
  • a threaded lead screw 86 which extends through and cooperates with an internally threaded aperture 88 in the carriage 16.
  • the lead screw 86 is held in position at each end by a leaf spring 90 mounted on a pillar 92 affixed to the respective end plate.
  • Switch contacts are then associated with each end of the lead screw and are opened or closed when the lead screw moves longitudinally against the bias of a leaf spring.
  • One of the end-of-lead-screw switches is indicated as switch 94 in the circuit diagram of Figure 9, though another is included in the supply line to the drive motor for the lead screw.
  • the arrangement is such that when the movement of the carriage 16 is arrested and while the lead screw 86 is still turning, the lead screw screws itself forwards through the aperture 88 in the carriage, against the leaf spring 90 at the end of the lead screw. Eventually the movement is such that the end-of lead-screw switches are actuated.
  • cams 96, 98 mounted on the square shaft 62 are two cams 96, 98 at one end which cooperate with sprung switch contacts, see Figure 9.
  • the cams are each generally circular except for a notch profiled to be able to accept a sprung contact of the switch. When the sprung contact is received in the cam notch, the relevant switch is open, while when the sprung contact rests on the remainder of the cam surface the switch is closed.
  • the two cams are mounted in opposed relationship such that the notches are 180" offset relative to the square shaft. Hence rotation of the shaft by 180° opens one switch and closes the second switch, and further rotation by 180° closes the said one switch and opens the said second switch.
  • the shaft 62 also carries a gear driven through a gear train from a motor (not shown).
  • the arrangement of the switches is as shown in Figure 9, where a normally open end of tape indicator 100 associated with the play back head is in parallel with one cam switch and a normally open end-of-lead-screw switch 94 is in parallel with the second cam switch.
  • Rotation continues for 180°, until the notch of the first cam arrives at the sprung contact of the first switch to open the circuit. Rotation thus ceases, either until the end-of-tape switch is closed or a parallel end-of-play switch is closed by the user. Rotation about 180° will then occur until the second switch is opened.
  • the shaft 62 also carries a third cam-operated switch which controls the lead screw motor and which disconnects this motor once the shaft begins to rotate upon arrival of the carriage at the selected cassette.
  • the tape head 18 includes transducer heads between the arms 108 of the mechanism 120 providing for reading of stereo tracks on the cassette. As such there are two output leads from the transducers, along with a common earth.
  • the carria carries three sprung contacts 63 as shown in Figure 6 which bear on three electrically isolated trackways 65 on the rail 67. The contacts 63 are connected to the transducers, and the trackways 65 are connected to the rest of the circuitry through connections at one end of the trackway.
  • FIG 10 shows in more detail a cassette of the invention, with an endless loop of tape 30 from a single spool 102 passing a guide post 104, pressure pad 106 and pinch wheel 28.
  • the cassette body is open at the pinch wheel for abutment with the capstan 22 and is also open at the pad for abutment with the head 18.
  • Notches 109 are formed at either side for eventual engagement with the fingers 108 of the casing 54.
  • Each cassette in the array 14 is biased to the position shown in Figure 1 but movable to the position shown in Figure 3. Such biasing is readily achieved using sprung holders or eqivalent devices and is not shown in the drawings.
  • One end-of-lead-screw switch turns off the lead srew motor, thereby discontinuing rotation of the lead screw.
  • the carriage is thus effectively stalled in position, having driven itself against the leaf spring 90.
  • Another end-of-lead-screw switch at the leaf-spring turns on the motor for the square shaft 62 of the cassette engagement mechanism 20.
  • the motor 24 drives the extended capstan 22 and thus the tape 30 by cooperation with the pinch wheel 28 of the selected cassette.
  • a multiple cassette machine of the kind shown in the drawings has been constructed and successfully used to play recorded music and to store a program for a micro-computer. Self-evidently, the invention is thus capable of extensive commercialization.

Landscapes

  • Automatic Tape Cassette Changers (AREA)

Abstract

Un enregistreur à cassettes (10), permettant la lecture de cassettes audio pré-enregistrées (12) comprend une rangée (14) composée de 30 cassettes et un chariot (16) portant une tête de lecture (18). Le chariot (16) et la tête (18) peuvent se déplacer vers l'une quelconque des cassettes (12) de la rangée (14). Un mécanisme d'engagement de cassette (20) sur le chariot (16) fait alors avancer la cassette sélectionnée jusqu'à la tête (18) de manière à en permettre la lecture. Un cabestan étendu (22) entraîné par un moteur (24) par l'intermédiaire du volant (26) agit de concert avec un galet d'entraînement (28) dans la cassette sélectionnée pour faire défiler la bande (30) devant la tête (18). Les signaux de sortie de la tête (18) peuvent ensuite être amplifiés et envoyés à des écouteurs ou à un autre type d'équipement, au choix.
EP19840903971 1983-10-24 1984-10-24 Enregistreurs a cassettes multiples Withdrawn EP0160065A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
GB8328327 1983-10-24
GB838328327A GB8328327D0 (en) 1983-10-24 1983-10-24 Multiple cassette machines
GB838330786A GB8330786D0 (en) 1983-11-18 1983-11-18 Multiple cassette machines
GB8330786 1983-11-18
GB8410857 1984-04-27
GB8410856 1984-04-27
GB848410857A GB8410857D0 (en) 1984-04-27 1984-04-27 Multiple cassette machines
GB848410856A GB8410856D0 (en) 1984-04-27 1984-04-27 Switches

Publications (1)

Publication Number Publication Date
EP0160065A1 true EP0160065A1 (fr) 1985-11-06

Family

ID=27449507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840903971 Withdrawn EP0160065A1 (fr) 1983-10-24 1984-10-24 Enregistreurs a cassettes multiples

Country Status (3)

Country Link
EP (1) EP0160065A1 (fr)
AU (1) AU3557684A (fr)
WO (1) WO1985002051A1 (fr)

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US6760644B2 (en) 2001-06-29 2004-07-06 Storage Technology Corporation System and method for transmitting communication signals to an automated robotic device in a data storage system
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Also Published As

Publication number Publication date
AU3557684A (en) 1985-05-22
WO1985002051A1 (fr) 1985-05-09

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