CN1051260A - Logging machine with coiling and tape drive - Google Patents
Logging machine with coiling and tape drive Download PDFInfo
- Publication number
- CN1051260A CN1051260A CN 90108668 CN90108668A CN1051260A CN 1051260 A CN1051260 A CN 1051260A CN 90108668 CN90108668 CN 90108668 CN 90108668 A CN90108668 A CN 90108668A CN 1051260 A CN1051260 A CN 1051260A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- register
- circuit
- magnetic head
- driver
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
- G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
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- 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
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/14—Masking or switching periodically, e.g. of rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
The register of tape drive is provided with rotating magnetic head cylinder and is used for the feed element of the storage medium of tape cassete except that coiling and tape drive, for driving mechanism and cooperating of signal processing electronic equipment need bigger debugging capability.This driver is the pre-accent eventually that is in harmonious proportion in factory generally.For simplification comprises the register debugging of plurality of single step, electronic equipment and the required debugging of doing of programming controller driving mechanism and magnetic head cylinder, tape and coiling driver are reached this purpose by reducing.Electrical circuit arrangement on the circuit board 2, is specially adapted to the driver of video recorder or DAT register below chassis 1.
Description
The present invention relates to a kind of logging machine, say in detail, relate to a kind of video and/or audio recording machine that has the driver chassis of realizing according to screw thread sweep record system, on this chassis, being provided with one reels and tape drive, be used for driving the storage medium of the recording strip form that remains on a box, also be provided with a magnetic head cylinder, it can be by the motor driven of a magnetic head cylinder, and have a plurality of circuit boards, be used to carry out the various circuit of signal Processing, control and adjusting, and each element that is used for these circuit.
As everyone knows, the existing commercial video and/or the magnetic head cylinder of audio recording machine and tape drive are that the motor that utilizes electrical control produces optimum condition to following relation, also promptly the various relative positions between the storage medium of the recording/reproducing magnetic head at the rotating magnetic head wheel circumference place that is arranged in the magnetic head cylinder and tape form are being produced optimum condition aspect both driving matching relationships.This high-precision control is to be handled by reference signal, and these reference signals are also referred to as the servocontrol ring as the common source of contact regulating command, are used for the control of magnetic head cylinder and tape drive.For example to a video recorder, reference signal is the frame change pulse of telling from TV signal, or correspondingly from this class pulse be stored in the sync mark that tape is derived, these all are sent in the comparator circuit of control (adjusting) device.In addition, well-known at control device, and for driving mechanism and the tape cassete Applied Digital circuit engineering in the electric controller of (loading) equipment of packing into, by this to utilize a microprocessor or computing machine to carry out programmed control to driving mechanism and tape drum load facility, control and supervision magnetic head cylinder, tape and coiling driver, and the various functions that realize each regulator.But this just needs to regulate the various signal processing circuits of driver and logging machine.For the measurement data of collecting each regulator with monitor driver and satisfy each driving mechanism and programme controlled requirement of tape drum load facility, then utilize sensor sampling regularly to realize.Sensor always is contained on the driver chassis, the signal processing circuit part of corresponding adjusting and control circuit is then owing to need a large amount of parts, so usually the group and in each individual components, and be arranged on the circuit board of variant position in the logging machine, and set up being electrically connected of each equipment room with electric wire.
Each driver is to utilize testing apparatus to carry out pre-adjustment in the factory that makes driver, regulates (transferring eventually) then at last at equipment manufacturing.
The objective of the invention is to simplify the various adjustings and the test of logging machine, these debugging include some distinct steps.
The register of playback of the present invention and/or tracer signal has a driver chassis, and the coiling and the tape drive that have a band shape storage medium to use on this dish remain in the box; By the rotating magnetic head cylinder of a magnetic head cylinder motor driving; And function control component, also have a plurality of circuit boards, be used for the circuit of Signal Processing, control and adjusting; And each element of using for these circuit, it is characterized by: a circuit board, its size is suitable for being attached on the driver chassis, wherein driver chassis and circuit board are merged into a machine assembly, and, for driver functions circuitry needed and element are arranged to match with the element on corresponding driving device chassis on circuit board, so that make driver chassis and circuit board form a functional unit.
The further interests that the present invention brought are illustrated in each appended claims.
Desired simplification mainly reaches the required adjusting of endeavouring of driving mechanism, regulator and control electronics and test by means of reducing.
Aspect main, arranged a circuit board in the bottom on driver chassis, except being used for that driving mechanism and tape drum load facility are carried out programme controlled sensor, and be used to monitor reel and the sensor of the detecting device of tape drive and the tape drum that is used for preventing writing down beyond, the register chassis also includes signal processing circuit, they are used for described servo control loop, and be used for driving mechanism, tape drum load facility and coiling, tape and magnetic head cylinder driver carry out described electrical control, therefore, the playback of the circuit of using for servo control loop and control circuit (external circuit) has not just needed in the driver testing apparatus.So, the adjusting of each driver and test just can be carried out easily, and the advantage that reduces each equipment room line number is provided in addition, and have therefore simplified the assembling and the test of equipment.
For above-mentioned adjusting and control, preferably adopt a microprocessor, in order to make driver startup work, corresponding instruction is delivered to microprocessor by an operating equipment, these instructions with and the report of finishing that turns back to operating means produce via data bus, these buses also can be connected with circuit board, as same operating voltage source electrical connecting wires that connects CD-ROM drive motor, adjusting and control circuit.By the next stage connecting line that is connected with circuit board, the circuit of the outside grade of the processing of circuit record that combines with microprocessor and replay signal can be connected, the connection of the related circuit plate of using for these lines preferably adopts so-called plug-in connector to finish.
Therefore, driver forms a machine assembly with circuit board, it can work in the suitable driver testing apparatus, for example it also can be a logging machine that is equal to pattern, be by means of a suitable operating equipment and a corresponding power supply and a tape cassete, the tape wrapping of be used for the accommodation zone guides, connect element (threading element) and tape drive being used and tape braking member etc. also are used for the process control of equipment.
In addition, video recorder that has a driver element according to the present invention's formation, the magnetic head that its vertical track is used can be regulated height and angle in simple mode, in this driver element, the adjusting of magnetic head cylinder and tape drive is played the electric and mechanical organ of all of servo control loop of influence and all exist worried permissible tolerance problem, so on the one hand aspect the reference tape playback of reference signal source, and between curved-line thread path and the signal that comes from vertical track synchronously and requirement, aspect the so-called X distance (tape length between a fixedly control head of using for sync mark and a fixing reference point) in the end, tape loop of this magnetic head cylinder of encirclement that determines according to logging machine system standard separately; And on the other hand, for regulating the command variable that relative position that magnetic head cylinder and tape drive obtain so-called record and playback transfer point is used, compensate with these variablees, those tolerances can be corrected in the driver testing apparatus or correspondingly adjusting to the end, according to the VHS standard, for example time window is assigned to the record-replay transfer point of first video heads, this transfer point is on 5 lines before first changes pulse front edge arrival or before the forward position arrival of the respective synchronization mark of noting (gating pulse), and continue 3 lines, for these adjustings (magnetic head promote and angle aspect, and X distance and record-replay transfer point aspect), only need additional being electrically connected, promptly the foregoing circuit section is connected with microprocessor, and with being electrically connected of magnetic head.Therefore, with being electrically connected of microprocessor, to be used for control by the determined signalling channel of mode of operation as the input sync mark of microprocessor and output control signal.
As when overhauling miscellaneous equipment, be assemblied in equipment and change driver, then non-common adjusting has not needed now.
Moreover by means of the demarcation point of interruption of perforation or fluting, circuit board also can comprise many discerptible veneers, and they can separate with circuit board or disconnect after common assembling, and are arranged in predetermined adaptive (installation) position after circuit board is fixed.These veneers preferably first veneer are from the teeth outwards suitable and be designed into the bottom of magnetic head cylinder, cooperate with motor winding, and therefore and as the stationary part of magnetic head cylinder motor; And second veneer is preferably set up the circuit that erasing head oscillator and amplifier are used thereon.Amplifier is preferably used in the audio signal of amplifying in the vertical track that is recorded in tape.
Moreover this circuit board also can manufacture with the so-called magnetic head amplifier of next circuit board as rotatable magnetic head.After common assembling, as this second veneer, it is can be dividually and be arranged in a predetermined installed position on the rotating band chassis.
As an example the present invention is described with accompanying drawing below.
Fig. 1 is the synoptic diagram of a driver using of a VHS video recorder;
Fig. 2 is the transverse section signal of driver, and has the part schematic cross section of magnetic head cylinder motor;
Fig. 3 is the wiring layout of the stationary part on magnetic head cylinder brace table.
Fig. 1 illustrates the representative structure of driver.
ST90(SGS-Thomson): except a microprocessor is used for described various control and adjusting, this circuit mainly comprises: a monostable trigger (the single triggering), control by processor, so that be video head 8a, 8b obtains the transfer point of described record-replay, this is on the one hand, and on the other hand, also in order in replay operations, to obtain its given alternately conversion, for the command variable that the record-replay transfer point is used is determined in adjustment process with following parts, promptly by means of microprocessor, trigger, mechanically be installed in magnetic head cylinder motor 11(Fig. 2) on a sensor 23 and described reference tape (reference signal source) and, be stored in subsequently in the nonvolatile memory of microprocessor, carrying out a kind of adjusting of record-replay transfer point can know from German patent DE A13528452 by means of a microprocessor, this microprocessor is also controlled the switching of signalling channel, and this passage is in the circuit of audio frequency that the change of handling according to mode of operation determines and vision signal.
U2559B(TELEFUNKEN) mainly comprise: a multiple circuits; A reference voltage source; Be used to operate circuit at different levels with Transistor-Transistor Logic level; And a digital-analog convertor, be used for converting modified value (pulse length of modulation, and can produce) to the analogue value by microprocessor, be used for control head cylinder 11 and main driving wheel motor 3.
U2560B(TELEFUNKEN): mainly comprise a motor driven amplifier, it has a conversion control circuit, is used for the motor coil 21 of magnetic head cylinder motor 11.
U2561B(TELEFUNKEN): mainly comprise a direction determining device, can import two FG signals to it, regulate the magnetic head cylinder and tape drive is obtained regulated variable in slow motor performance with thinking, the FG signal can be produced by the tech-generator of main driving wheel motor 3; Also comprise adjustable a writing-sense amplifier, be used for gating pulse (sync mark).
L272(SGS-Thomson): comprise that mainly a motor bridging with driving amplifier connects, be used for a feed motor (threading motor) 28(method of operation control motor), so that drive driver and box-packed control gear of going into equipment.
All electronic units of naming above are shown among Fig. 1 and are illustrated in down.
The sensor 34a that loads the sensor 34b of back (AL) and not loading (UL) is designated as photoelectricity frame (hook) coupling mechanism, is used for the process control of driving mechanism; Coiling plate sensor 41a, 41b are designated as photoelectricity frame coupling mechanism equally; A tape cassete position transducer 13b is the form of sentive switch, is used for box-packed process control of going into equipment; A sensor 36 also is designated as a sentive switch, is used to protect tape cassete to avoid record; And a box chamber light emitting diode (LED) 48 is together with start sensor 29b and stop sensor 29a, one is used from supervision tape 63, for this reason, as is generally known ground tape cassete 64 is provided with suitable optical channel and transparently sees the starting of tape and stop, sentive switch 36,13b, box chamber LED 48 and start sensor 29b, stop sensor 29a is inserted into each corresponding aperture 27a of tape cassete 1,27b, 35, in 49 and 135, coiling plate sensor 41a, 41b can both take turns running by toothed, each wheel lays respectively at coiling plate 39a, below the 39b, penetrate and pass in the process at tape 63, sensor 34b after the loading and the 34a that does not load can turn round by being positioned at chassis 1 beneath console panel (not shown) segmental arc, by this, driver control mechanism physical location separately is instructed to microprocessor.
Tape 63 is guided out tape drum 64 by connecting element 37a and 37b and 62, and around a magnetic head cylinder 6 coilings, and be added to fixing always being coated with on erasing head 32 and the combined head 58, combined head 58 comprises a control head that is used for sync mark and audio frequency erasing head and as audio head, the axle 4 of main transmission motor 3 drives tape 63 by means of rubber deflector roll 61 on the one hand, and on the other hand, by a belt pulley 5, a rubber belt 60, and the next belt pulley 46(by being provided with a pinion wheel 47 in the drawings according to the tape rotation direction shown in the arrow by it), and make a tumbler gear 45 be subjected to the driving of pinion wheel 47 therefrom, above-mentioned axle 4 and the driver plate 39a of tape coiler 38a are coupled, and this explanation is corresponding to mode of operation " rewinding retrieval mode " (Search mode backWards).Feed motor 28 and main transmission motor 3 for by shown in plug-in connector 31,65 on electric, be connected to circuit board 2.
The audio frequency erasing head, audio frequency and control head are to be connected on the dividing plate 51 that passes from circuit board 2 by strip line 59, it contains the individual conductor that each magnetic head is used in the strip line, control head is positioned at perpendicular on the line of tape sense of rotation and under audio head, this control head is recorded in the gating pulse that the picture synchronizing pulse from TV signal attracts on the tape 63, this tape 63 is at its playback duration Be Controlled head scanning, so that recover respectively or produce described relative position state, the control signal of scanning and the control signal that is recorded are imported by a strip line 53 that is connected to veneer 51 and circuit board 2, by this strip line or respectively by their next bar lines of line separately, an erasing head or be included in that each circuit of audio frequency playback amplifier is provided with operating voltage in the veneer 51, and therefore the signal path of these circuit is converted, to change the method for operation of record-replay.In this manner of playback, the signal that is scanned by audio head and be sent to plug-in connector 57 by the playback amplifier amplifying signal, this connector is arranged on the veneer 51, next stage is handled audio signal and also can be communicated on this connector, in recording mode, by means of switching signal path on the contrary, the audio signal that is fed on the plug-in connector 57 directly arrives audio head, pierce circuit offers total erasing head 32 with its oscillating voltage by a line (not shown) on the one hand under recording mode, and on the other hand, under recording mode, and during the back line (Post-Scoring) of an existing videograph, its oscillating voltage is fed to the audio frequency erasing head, the amplitude that can deliver to the oscillating voltage of audio frequency erasing head can utilize-and variable resistor 56 regulates, because well-known, this is side by side tape to be carried out premagnetization, so that audio signal is recorded on vertical track, veneer 51 is by spacer 55a, 55b is fixed to chassis 1.
The plug-in connector in being included in plug-in connector 31,65, also have electric plug-in connector 50,66,67 to be positioned on the circuit board 2, plug-in connector 66 is as being connected with power supply, so that with operating voltage be provided to regulate and control circuit main transmission motor 3, feed motor 28, magnetic head cylinder motor 11 and be included in veneer 51 and circuit board 44 in circuit or circuit section, plug-in connector 67 usefulness connect a data bus, so that microprocessor is connected on the operating means.Plug-in connector 50, as microprocessor and the external electric highway section of handling audio frequency and vision signal are electrically connected, to reach the purpose of coming the control signal passage according to working method, and reach input sync mark (by an antenna or via the sync mark of a so-called safety socket (SCART socket) input TV signal), or the purpose of output sync mark, this sync mark can be produced by the reorder function of microprocessor for appointment.
The signal transverse section that Fig. 2 represents is represented driver and is had the part signal transverse section of magnetic head cylinder motor 11.
Installation and the fixing position of circuit board 2 in chassis 1 can be identified, for instance, on circuit board 2, indicate an electrolytic condenser 70, a transistor 72, a resistance 69, a prominent face (break) 75 that in chassis 1, is provided with for plug-in connector 50, and another plug-in connector 73, plug-in connector 73 is inserted into plug-in connector 74, the latter include connection to the coupling part, and locate on the circuit board 54 of motor case 52 outsides that place main transmission motor 3, tape conductor side at circuit board 2 also has a resistance 68, it be configured to one so-called " mounted on surface magnetic spare " (SMD) and integrated circuit 71 also with the form installing of SMD.
Magnetic head cylinder 6 supports the annular section 25 of platform 10 to remain on a predetermined angular position by being positioned at The One On The Chassis one, delivery video head 8a, the motor drive shaft 13 that the head wheel 7 of 8b attaches ground and magnetic head cylinder motor 11 is coupled, in the transverse section of this signal, can declare and recognize rotor portion 14 and stationary part 20, they are encased by the annular section 76 of motor case 12, the rotor disk 15 of annular is to be made by transparent plasticity thing, there is in one ring 16 be bonded to rotor disk 15 and surrounded by a soft iron ring 17, this ring 16 includes a plurality of little permanent magnet circumferentially equidistant and that be spaced apart from each other, they are being placed facing to stator coil 21, the electric commutation of this coil energy, so that generation rotating magnetic field, stator coil 21 passes on the dividing plate 22 of circuit board 2 and is arranged to annular, rotor disk 15 owing to motor drive shaft 13 attach that coupling rotates during, be subjected to the sensor 23 of photoelectricity frame arranged in form on veneer 22 rotor disk 15 outer shroud 18 driving and turn round, therefore, produce pulse by means of being present in the wire tag on the outer shroud 18, utilize these pulses and obtain to regulate the magnetic head cylinder, drive tape and be the commutate required regulated variable of commutation control signal of usefulness of stator coil 21.
Set up between stationary part 20 and the circuit board 2 by flexible circuit conductor bridge 24 and to be electrically connected accordingly, these are also as stationary part 20 is converted to the hinge that gets in its installation site, cooperate guide for this installation site provides a form, this guide is made of guide hole that is arranged in veneer 22 and the pilot pin 19 that is in place, magnetic head cylindrical base 9 fixed positions.
In the back of the motor drive shaft 4 of main transmission motor 3, can see clearly by spacer 55a, 55b and be assembled to The One On The Chassis veneer 51, it includes the circuit of described erase oscillator and audio frequency playback prime amplifier.
Fig. 3 illustrates stationary part 20 fixing on the support platform 10 of magnetic head cylinder 6.
At the sillometer place of the annular section 25 of supporting platform 10, have two so-called round caps 77 toward each other lay and have can stayed surface, veneer 22 is screwed onto on these circle caps.Therefore, promptly cause stationary part 20 needed predetermined deflected position for the fixing seating surface of the round cap 77 of veneer 22 usefulness.
The present invention is specially adapted to video and DAT register driver.
Claims (15)
1, the register of playback and/or tracer signal has a driver chassis, and a coiling and a tape drive of being with the shape storage medium to use remains in the box on this chassis; By the rotating magnetic head cylinder of a magnetic head cylinder motor driving; And function control component, also have a plurality of circuit boards, be used for the circuit of Signal Processing, control and adjusting; And each element of using for these circuit, it is characterized by:
A circuit board (2), its size is suitable for being attached on the driver chassis 1, wherein, driver chassis 1 and circuit board (2) are merged into a machine assembly, and, for driver functions circuitry needed and element are arranged to match with the element on corresponding driving device chassis 1 on circuit board (2), so that make driver chassis 1 and circuit board (2) form a functional unit.
2, according to the register of claim 1, it is characterized by: circuit board (2) is fixed on the driver chassis 1 in the bottom on driver chassis 1, makes circuit board (2) strictly be positioned in predetermined installation site whereby.
3, according to the register of claim 1 or 2, it is characterized by: one is installed on the circuit board (2) for a stationary part (20) of magnetic head cylinder motor (11) usefulness.
4, according to the register of claim 3, it is characterized by: stationary part (20) is positioned on the interior veneer of circuit board (2) (22), is established by the perforation and/or the groove of the middle stop setting of demarcating around it.
5, according to the register of claim 3 or 4, it is characterized by: the circuit that provides between veneer (22) and circuit board (2) connects, and it acts on as hinge, and the veneer (22) that is used for having stationary part (20) is transformed into the installation site.
6, according to any one register in the claim 3 to 5, it is characterized by: magnetic head cylinder (6) includes the bottom (9) that is positioned at the magnetic head cylinder on the last fixed position, driver chassis (1), and this fixed head cylindrical base (9) comprises an installation site at stationary part (20), and carries out the guide (19) that form cooperates.
7, according to the register one of in the claim 3 to 6, it is characterized by: be distributed in a stator coil (21) on the radius and be arranged in the stationary part (20).
8, according to the register of claim 7, it is characterized by: in stationary part (20), located a sensor (23), on the one hand, be used to obtain the control signal of using for the electric commutation face of stator coil (21); And on the other hand, obtain regulated variable for adjusting magnetic head cylinder and tape drive.
9, according to the register one of in the claim 1 to 8, it is characterized by: circuit board (2) is provided with strict more predetermined veneer (51), it is established by perforation on every side, in each perforation, mainly be positioned with an oscillator and an amplifier circuit, and the element of using for these circuit.
10, according to the register of claim 9, it is characterized by: this pierce circuit is used for smearing the signal that is recorded in band shape storage medium (63), and this amplifier circuit is as the playback amplifier of signal in the long rails that is recorded in storage medium (63).
11, according to the register of claim 9 or 10, it is characterized by: veneer (51) be installed to driver chassis (1) above, strictly give whereby and with veneer (51) to fix on a predetermined installation site.
12, according to the register one of in the claim 9 to 11, it is characterized by: the output oscillating voltage of oscillator can be conditioned.
13, according to the register one of in the claim 1 to 12, it is characterized by: circuit board (2) is made with next circuit board (44).
14, according to the register of claim 13, it is characterized by: circuit board (44) comprises a magnetic head amplifier circuit and the element used of circuit for this reason, so that recording/reproducing magnetic head (8a, 8b) is arranged on this magnetic head cylinder (6) by rotating mode.
15, according to the register of claim 13 or 14, it is characterized by: be set at the upward strict predetermined installed position in driver chassis (1) immediately following circuit board (2) and separated circuit board (44).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3935631.0 | 1989-10-26 | ||
| DE19893935631 DE3935631A1 (en) | 1989-10-26 | 1989-10-26 | RECORDER WITH A REEL AND TAPE DRIVE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1051260A true CN1051260A (en) | 1991-05-08 |
Family
ID=6392239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90108668 Pending CN1051260A (en) | 1989-10-26 | 1990-10-26 | Logging machine with coiling and tape drive |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0497797A1 (en) |
| JP (1) | JPH05501934A (en) |
| CN (1) | CN1051260A (en) |
| AU (1) | AU6527990A (en) |
| DE (1) | DE3935631A1 (en) |
| WO (1) | WO1991006954A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07147010A (en) * | 1993-09-28 | 1995-06-06 | Toshiba Corp | Motor device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6412296U (en) * | 1987-07-10 | 1989-01-23 | ||
| US4809115A (en) * | 1987-07-17 | 1989-02-28 | Hitachi, Ltd. | Magnetic recording and reproducing apparatus |
| DE68928698T2 (en) * | 1988-03-15 | 1998-09-24 | Mitsubishi Electric Corp | Belt tensioning device |
-
1989
- 1989-10-26 DE DE19893935631 patent/DE3935631A1/en not_active Withdrawn
-
1990
- 1990-10-17 JP JP51413290A patent/JPH05501934A/en active Pending
- 1990-10-17 WO PCT/EP1990/001755 patent/WO1991006954A1/en not_active Application Discontinuation
- 1990-10-17 AU AU65279/90A patent/AU6527990A/en not_active Abandoned
- 1990-10-17 EP EP19900915127 patent/EP0497797A1/en not_active Withdrawn
- 1990-10-26 CN CN 90108668 patent/CN1051260A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE3935631A1 (en) | 1991-05-02 |
| EP0497797A1 (en) | 1992-08-12 |
| JPH05501934A (en) | 1993-04-08 |
| AU6527990A (en) | 1991-05-31 |
| WO1991006954A1 (en) | 1991-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |