CN1377480A - Computer security device for hard disc protection - Google Patents
Computer security device for hard disc protection Download PDFInfo
- Publication number
- CN1377480A CN1377480A CN 00813756 CN00813756A CN1377480A CN 1377480 A CN1377480 A CN 1377480A CN 00813756 CN00813756 CN 00813756 CN 00813756 A CN00813756 A CN 00813756A CN 1377480 A CN1377480 A CN 1377480A
- Authority
- CN
- China
- Prior art keywords
- storage unit
- switchgear
- computer installation
- contact
- electrical connection
- 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
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/80—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in storage media based on magnetic or optical technology, e.g. disks with sectors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Storage Device Security (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention concerns a computer device (8) which comprises at least two memory units (10, 12). The memory units (10, 12) are of the kind the function of which in the computer device at least partly is determined by whether electric connection is the case between two contact surfaces (14, 16; 18, 20) of the memory unit (10, 12). The computer device (8) also comprises a switching device (22). The switching device (22) is connected with the two contact surfaces (14, 16) of at least a first (10) of the memory units (10, 12). The electric connection between the two contact surfaces (14, 16) of the first memory unit (10) may be opened and closed with the switching device (22). The function of the first memory unit (10) is thus determined by whether the switching device (22) is set for closure of opening of the connection between the contact surfaces (14, 16).
Description
Background of invention and prior art
The present invention relates to a kind of computer installation, it comprises: at least two storage unit, wherein each includes at least two surface of contact in these storage unit, and the function of such storage unit in computer installation depends on situation about being electrically connected between these two surface of contact of storage unit at least in part; And at least one can manually-operated switchgear, this switchgear can be set so that closed or disconnect at least one connection.
Known this computer installation can be a personal computer (PC) for example.This PC comprises two hard disk units that for example constitute two storage unit sometimes.A hard disk unit can play for example effect of master unit, and another hard disk unit can play the effect of slave unit.Hard disk unit is normally such, and promptly comprising can be by the paired a plurality of contact pin that connect of wire clamp (being so-called wire jumper).By connecting two predetermined contact pins, certain hard disk unit can be defined as for example master unit with wire clamp.When computer installation comprises two such hard disk units,, one is defined as master unit and another is defined as slave unit usually by means of described wire clamp.In addition, computer installation comprises switchgear sometimes, and this switchgear can be set, so that connect by the key closed and disconnected.But the connection of closed and disconnected may only be the line voltage distribution of this computer installation.This means the people that can not the use key device that can't start or use a computer.
Known a kind of computer installation that possesses two hard disk units from file CA 2197502.This document has been described the computer installation that possesses switch.Can, which be selected to connect in two hard disk units. by this switchThereby can be without another hard disk unit.One or two key can be used for this switch.Switchgear is relatively complicated, and comprises public control and address wire and two circuit that three-state buffer is connected with computer installation.These impact dampers are connected to hard disk unit successively via two match circuits.
File US-A-5434562 has described the computer installation that can have the peripherals of multiple connection.This document has been described the different modes that the user can use different units.In the simplest example, determine whether inserting certain unit by closure or open-circuit line voltage.In other examples, adopt the circuit of more complicated to influence to deliver to or from the different control signals of control module (controller).
Therefore, said apparatus or relative complex are perhaps only utilized the conversion of line current or line voltage distribution.
Need can determine the possibility of the function of storage unit in computing machine with simple mode.For example, have such situation, for example in the family child father and mother not the time play computing machine.The program that is stored in the hard disk is had problems.By the used program of child, hard disk may be subjected to the infection of virus etc.Therefore, preferably can stop without permission people, for example child use a computer in certain hard disk at least.
Summary of the invention
The objective of the invention is to obtain a kind of computer installation, it makes the possibility that is switching to of the storage unit that comprises in the computing machine by very simple structure.For example, if the different user of computer installation uses different storage unit, may be favourable.An advantage of the present invention is to adopt existing surface of contact on the storage unit.
Realize purpose of the present invention by starting defined computer installation, the characteristics of this computer installation are: described switchgear is connected in the storage unit two of first module surface of contact at least, so that can by this switchgear disconnect and two surface of contact of closed described first storage unit between electrical connection, the described function of wherein said first storage unit depends on that switchgear will the electrical connection between two surface of contact of described first storage unit is set to disconnect still closure.Therefore, switchgear is directly controlled the closure and the disconnection of the connection between the surface of contact on the storage unit.Thereby between the surface of contact of switchgear and storage unit, do not need complicated circuit.Therefore, switchgear preferably directly links to each other with described surface of contact, and between them without any other circuit.
According to one embodiment of present invention, described switchgear comprises locking device, and the user that the latter has limited computer installation is provided with the possibility of the Push And Release of this switchgear.Thereby might have only the people that can use locking device could determine between the surface of contact is closure or disconnection.
According to another embodiment of the present invention, described locking device is arranged to by key and operates.Have only the people that can use this key could switch this switchgear.Also might be without key, but arrange to have the locking device of certain code.
According to still another embodiment of the invention, described switchgear also links to each other with two surface of contact of second unit at least two storage unit, so as can to disconnect and two surface of contact of closed second storage unit between electrical connection, wherein: at first desired location, electrical connection between described two surface of contact of first storage unit is closed, and at second desired location, the electrical connection between described two surface of contact of second storage unit is closed.Which storage unit two surface of contact of each storage unit can for example determine to be connected thus and can use in computer installation.When switch being set, can use first storage unit according to first desired location.When switch being set, can use second storage unit according to second desired location.
According to still another embodiment of the invention, described locking device is arranged like this, makes described first and second desired locations comprise the variable locking position that two available described keys are provided with.This means which in two desired locations the people that can obtain this key can the selector switch device will be arranged on.For example, father and mother are during without computer installation, and they can be provided with switchgear by key, make and can only visit certain storage unit.Children's device that then can freely use a computer, thereby addressable this storage unit.And children can't visit normally used another storage unit of father and mother.
According to still another embodiment of the invention, switching arrangement being arranged becomes also to comprise at least the another one desired location, wherein, on this other desired location, in all storage unit that link to each other with switchgear, the electrical connection between two surface of contact (linking to each other with switchgear) that switchgear connects respectively disconnects.If switchgear is arranged on this other desired location, just can prevent to import from all storage unit.When for example locking device is arranged to operate with key, this means that if switchgear is located at this other desired location, the user who does not then obtain this key can not use this computer installation.
According to still another embodiment of the invention, described first and second storage unit are hard disk units.Therefore, the function of hard disk unit in computer installation can be depending on the switching that switchgear is done.
According to still another embodiment of the invention, described two surface of contact of described first and second storage unit are made up of two contact pins, and they are such, and promptly this contact pin is arranged to and can connects by wire clamp.Such contact pin for example is arranged on the hard disk unit.These pins are types, can be connected to each other by wire clamp (so-called wire jumper).
According to still another embodiment of the invention, computer installation comprises at least one casing, and wherein said switching arrangement being arranged and is arranged in order to be able to outer setting from casing on casing.If user's easy operating switchgear, it is favourable that yes.Therefore, the vantage point of switchgear is on the casing of computer installation.
According to still another embodiment of the invention, can computer installation be set like this, make switchgear be arranged on first desired location and mean that the first module in the described storage unit is connected for the computer installation use, and second storage unit not be connected and uses.Suitably but and the nonessential practice be, also can computer installation be set like this, makes switchgear be located at the second place and mean that second storage unit is connected for use, and first storage unit is not connected, thereby can not use.
According to still another embodiment of the invention, computer installation is set like this, making switchgear be located at first desired location means that first and second storage unit all are connected for computer installation and uses, wherein first storage unit plays a leading role, and second storage unit (or a plurality of storage unit) plays subordinate role.Switchgear preferably also can comprise the second place, has connected first and second storage unit simultaneously and use for computer installation on this position, and first storage unit plays subordinate role but second storage unit plays a leading role.The suitable practice is to dispose computing machine by this way: switchgear links to each other with the predetermined surface of contact of storage unit, and has defined when computing machine is set that one of them storage unit plays a leading role and another storage unit plays subordinate role.
The accompanying drawing summary
Now the present invention is illustrated by the embodiment that provides as an example and with reference to accompanying drawing.
Fig. 1 schematically shows according to computer installation of the present invention.
Fig. 2 also schematically shows the switchgear that links to each other with storage unit.
Fig. 3 schematically shows the front elevation of the example of switchgear.
The detailed description of the embodiment of the invention
Fig. 1 schematically shows computer installation 8.In this example, computer installation 8 is personal computer (PC), but also can construct the computing machine of other types according to the present invention.Computer installation 8 comprises casing 26.Switchgear 22 is set on casing 26.Therefore, can touch and be provided with switchgear 22 from casing 26 outsides.Switchgear 22 comprises locking device 23.In this example, locking device 23 requires the user can obtain key 24, so that switchgear 22 can be set.
Fig. 2 schematically shows two storage unit 10,12.These storage unit 10,12 are formed for example two hard disk units 10,12.These hard disk units 10,12 suitably are arranged in the casing 26 of computer installation 8.Also may comprise plural hard disk unit 10,12 by computer installation 8.Dotted line is represented another such hard disk unit 28.Each comprises at least two surface of contact 14,16 and 18,20 respectively in the storage unit 10,12.These surface of contact 14,16,18,20 preferably constitute two contact pins, and these contact pins are to be arranged to the sort of type that available wire clamp (being so-called wire jumper) connects.This class contact pin 14,16,18,20 is type normally, and storage unit is furnished with several contact pins 14,16,18,20 that so available wire clamp is connected usually.By connecting certain to such contact pin 14,16, for example definable storage unit 10 constitutes the main memory unit of computer installation 8.Other each other functions to contact pin definable said memory cells.Shown in storage unit 28 at least one pair of such contact pin 31,32 is also arranged.The function of the storage unit 10,12,28 in the computer installation 8 depends on that at least in part being electrically connected is between two surface of contact 14 and 16, or between 18 and 20 or between 31 and 32.
In addition, also can define when computer installation 8 is set: when predetermined contact pin was connected to each other, certain storage unit 10,12,28 had any function in computer installation 8.For example, computer installation 8 can be provided with like this: if when the predetermined contact pin on certain storage unit is connected to each other, then said memory cells is connected for computer installation and uses, and another or a plurality of storage unit do not connect and can not use.Perhaps, can define like this when computing machine is set: when the predetermined contact pin of certain storage unit was connected to each other, this storage unit played master unit, and other storage unit play slave unit.This means that wherein the guiding of computer installation 8 is to carry out from the storage unit of master unit effect.
Two electrodes 44,46 of switchgear 22 are connected by two surface of contact 14,16 of circuit 15,17 with the first module 10 of storage unit.If the key 24 of locking device 23 is arranged on the primary importance that is connected closure that makes between the electrode 44 and 46, then between the contact pin 14 and 16 of storage unit 10 be connected also closed.The function of first storage unit 10 depends on that two contact pins 14 of 22 pairs of storage unit 10 of switchgear are closures with 16 settings that are electrically connected or disconnect.According to simple embodiment of the present invention, only need connecting line 15 and 17 between switchgear 22 and the storage unit 10.Therefore, just can connect or disconnect this storage unit 10 by key 24.
According to illustrated embodiment, the electrode 48,50 of switchgear 22 is connected with the contact pin 18,20 of second storage unit 12 by line 19,26.Can be arranged on the second place to switchgear 22 by key 24, electrode 48 is electrically connected mutually with 50 in this position.This means that the contact pin 18,20 of second memory storage 12 is connected to each other.When key was arranged on this position, the connection that electrode is 44,46 disconnected, and simultaneously, the connection that contact pin is 14,16 also disconnects.
Be placed on primary importance by a key 24, thereby for example only can connect storage unit 10, and storage unit 12 is not connected.Be placed on the second place by a key 24, can connect storage unit 12, and storage unit 10 be not connected.As selection, can play a leading role and 12 subordinate roles of another storage unit in storage unit 10 of primary importance, vice versa at second desired location.Switchgear 22 also can comprise the another one desired location.This other desired location can be such, when switchgear 22 is arranged on this position, is connected in the storage unit 10,12,28 of switchgear 22 at all, and being connected between two contact pins 14 are with 16,18 and 20 and 31 and 32 disconnects respectively.When switchgear 22 is arranged on this other position, for example can not carry out guiding.
How the user that Fig. 3 schematically illustrates 23 pairs of devices of locking device of switchgear 22 seems.Switchgear 22 can suitably be contained on the support 25.This support 25 can for example be adapted to be mounted within certain normal place of computing machine.This device can be equipped with first cue mark 27 and second cue mark 29.Distinct symbols can for example be distinguished or comprise to these two cue marks 27,29 by different colours, different pattern.Simple for the installation that makes switchgear 22, line 15,17 and 19,21 (see figure 2)s can suitably have the indication corresponding to cue mark 27,29 respectively.The line 15,17 of guiding storage unit 10 into can constitute one section common cable, also can twist together.This cable or these lines 15,17 can for example comprise and corresponding certain color of the color of first cue mark 27.Correspondingly, line 19,21 can comprise and corresponding another color of the color of second cue mark 29.Locking device 23 also can have the centre position of placing key 24 as shown in Figure 3.Might can indicate this centre position by the 3rd cue mark 30.This centre position can be for example above-mentioned another one desired location, and wherein, the contact pin 14 and 16 of all storage unit 10,12,28,18 and 20,31 disconnected with 32 be connected.
When key 24 rotation direction left sides, when promptly pointing to first cue mark 27, preferably have lines 15,17 with the corresponding indication of cue mark 27 by short circuit.If the key 24 rotation direction right sides, promptly point to second cue mark 29, then preferably has the closure that is connected with 19,21 on the line of cue mark 29 corresponding symbols.
The present invention can enough very simple methods solve described problem by means of the lock of the function that can define certain storage unit, for example hard disk unit.Because surface of contact, for example contact pin 14,16,18,20 have been arranged on the hard disk unit,, only need from these contact pin 14,16,18,20 extension lines 15,17,19,21 to switchgear 22 according to the present invention.Do not need other electronic circuits between contact pin 14,16,18,20 and the switchgear 22.
Example as application of the present invention is mentioned such situation possibly, promptly uses the different user of same computing machine, the colleague who for example works together to want to use different hard disk units in order to avoid the operation program each other of taking a risk.According to the present invention, can easily be provided with to connect which hard disk unit by means of switchgear.Different user can use themselves hard disk, and need not emit the risk that makes the content changing of storing on other user's hard disks.
The invention is not restricted to illustrated embodiment, but can in the scope of following claims, change and revise.As mentioned above, locking device may comprise the desired location that all storage unit all can not be connected.In addition, also can be arranged to locking device to operate with different keys, these keys can insert different storage unit: switchgear can be arranged on primary importance with first key, and switchgear can be arranged on the second place with another key.
Claims (11)
1. a computer installation (8), it comprises:
At least two storage unit (10,12), wherein each unit in these storage unit (10,12) includes at least two surface of contact (14,16; 18,20), and their functions in described computer installation (8) depend on this two surface of contact (14,16 at least in part; Whether electrical connection is arranged 18,20), and
At least one manually-operated switchgear (22), this switchgear can be arranged to closure or disconnection at least one connection, it is characterized in that:
Two surface of contact (14,16) of the first module at least (10) in described switchgear (22) and the described storage unit are connected, make by described switchgear (22) can disconnect and two surface of contact (14,16) of closed described first storage unit (10) between electrical connection, the described function of wherein said first storage unit (10) depends on that described switchgear (22) is arranged to disconnection or closure with the electrical connection between two surface of contact (14,16) of described first storage unit (10).
2. computer installation as claimed in claim 1 (8) is characterized in that: described switchgear (22) comprises locking device (23), and the user that the latter can limit described computer installation (8) is provided with closure of this switchgear (22) or the possibility that disconnects.
3. computer installation as claimed in claim 2 (8) is characterized in that: described locking device (23) is configured to and can operates by key (24).
4. as the described computer installation of above any one claim (8), it is characterized in that: described switchgear (22) also is connected with two surface of contact (18,20) of Unit second (12) in described two storage unit (10,12) at least, make by described switchgear (22) can disconnect and two surface of contact (18,20) of described second storage unit of closure (12) between electrical connection; Described switchgear (22) is configured to comprise at least first and second desired locations, at described first desired location, electrical connection between described two surface of contact (14,16) of described first storage unit (10) is closed, and at described second desired location, the electrical connection between described two surface of contact (18,20) of described second storage unit (12) is closed.
5. as claim 3 and 4 described computer installations (8), it is characterized in that: described locking device (23) is provided with like this, makes described first and second desired locations comprise and can pass through two variable locking positions that described key (24) is provided with.
6. as claim 4 or 5 described computer installations (8), it is characterized in that: described switchgear (22) is configured to also comprise at least one desired location in addition, on this other desired location, in all storage unit (10,12,28) that link to each other with described switchgear (22), the surface of contact that links to each other with switchgear (14,16; 18,20; 31,32) electrical connection between any two disconnects.
7. as the described computer installation of above any one claim (8), it is characterized in that: described first (10) and second (12) storage unit is a hard disk unit.
8. as the described computer installation of above any one claim (8), it is characterized in that: described two surface of contact (14,16 of described first (10) and second (12) storage unit; 18,20) be made up of two contact pins, described contact pin is configured to and can connects by wire clamp.
9. as the described computer installation of above any one claim (8), it comprises at least one casing (26), it is characterized in that: described switchgear (22) is arranged on the described casing (26), and is arranged to and can be provided with from the outside of described casing (26).
10. as the described computer installation of above any one claim (8), it is characterized in that: described computer installation (8) is provided with like this, make described switchgear (22) be arranged on primary importance and mean that the first module (10) in the described storage unit is connected for described computer installation (8) use, and described second storage unit (12) is not connected use.
11. as the described computer installation of above any one claim (8), it is characterized in that: described computer installation (8) is provided with like this, make described switchgear (22) be arranged on primary importance and mean that described first (10) and second storage unit (12) is connected for described computer installation (8) use, described first storage unit (10) plays a leading role and described second storage unit or a plurality of storage unit (a 12) subordinate role.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9902869A SE516759C2 (en) | 1999-08-10 | 1999-08-10 | Security device for protecting hard disk drive in a computer |
| SE99028698 | 1999-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1377480A true CN1377480A (en) | 2002-10-30 |
Family
ID=20416642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00813756 Pending CN1377480A (en) | 1999-08-10 | 2000-08-10 | Computer security device for hard disc protection |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1222504A1 (en) |
| CN (1) | CN1377480A (en) |
| AU (1) | AU6603500A (en) |
| CA (1) | CA2381448A1 (en) |
| SE (1) | SE516759C2 (en) |
| WO (1) | WO2001011449A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7137034B2 (en) | 2000-05-19 | 2006-11-14 | Vir2Us, Inc. | Self repairing computer having user accessible switch for modifying bootable storage device configuration to initiate repair |
| US7100075B2 (en) | 2000-05-19 | 2006-08-29 | Sel Repairing Computers, Inc. | Computer system having data store protected from internet contamination by virus or malicious code and method for protecting |
| US7111201B2 (en) | 2000-05-19 | 2006-09-19 | Self Repairing Computers, Inc. | Self repairing computer detecting need for repair and having switched protected storage |
| CA2414251A1 (en) | 2000-05-19 | 2002-03-14 | Self Repairing Computers, Inc. | A computer with switchable components |
| US7096381B2 (en) | 2001-05-21 | 2006-08-22 | Self Repairing Computer, Inc. | On-the-fly repair of a computer |
| US7392541B2 (en) | 2001-05-17 | 2008-06-24 | Vir2Us, Inc. | Computer system architecture and method providing operating-system independent virus-, hacker-, and cyber-terror-immune processing environments |
| US7849360B2 (en) | 2001-05-21 | 2010-12-07 | Vir2Us, Inc. | Computer system and method of controlling communication port to prevent computer contamination by virus or malicious code |
| US7536598B2 (en) | 2001-11-19 | 2009-05-19 | Vir2Us, Inc. | Computer system capable of supporting a plurality of independent computing environments |
| US7788699B2 (en) | 2002-03-06 | 2010-08-31 | Vir2Us, Inc. | Computer and method for safe usage of documents, email attachments and other content that may contain virus, spy-ware, or malicious code |
| WO2008092031A2 (en) | 2007-01-24 | 2008-07-31 | Vir2Us, Inc. | Computer system architecture having isolated file system management for secure and reliable data processing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4734851A (en) * | 1985-04-17 | 1988-03-29 | Dennis Director | Write protect control circuit for computer hard disc systems |
| GB2201992A (en) * | 1987-03-12 | 1988-09-14 | Lucas Ind Plc | Electrical switch and lock assembly |
| DE3914239A1 (en) * | 1988-07-07 | 1990-01-11 | Verweyen Gmbh | DATA PROTECTION DEVICE |
| GB2279163A (en) * | 1993-06-15 | 1994-12-21 | Boxware Limited | Computer security device which disables a disc drive |
| JPH08203257A (en) * | 1995-01-25 | 1996-08-09 | Mitsubishi Electric Corp | Card-type hard disk apparatus and data-processing apparatus using the apparatus |
-
1999
- 1999-08-10 SE SE9902869A patent/SE516759C2/en not_active IP Right Cessation
-
2000
- 2000-08-10 CN CN 00813756 patent/CN1377480A/en active Pending
- 2000-08-10 CA CA002381448A patent/CA2381448A1/en not_active Abandoned
- 2000-08-10 EP EP00953616A patent/EP1222504A1/en not_active Withdrawn
- 2000-08-10 WO PCT/SE2000/001567 patent/WO2001011449A1/en not_active Application Discontinuation
- 2000-08-10 AU AU66035/00A patent/AU6603500A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1222504A1 (en) | 2002-07-17 |
| CA2381448A1 (en) | 2001-02-15 |
| SE516759C2 (en) | 2002-02-26 |
| AU6603500A (en) | 2001-03-05 |
| SE9902869D0 (en) | 1999-08-10 |
| WO2001011449A1 (en) | 2001-02-15 |
| SE9902869L (en) | 2001-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8708724B2 (en) | Patch cord insertion detection and light illumination capabilities | |
| US8721360B2 (en) | Methods for patch cord guidance | |
| CN103427645B (en) | Power supply unit, power connector combination and data handling system | |
| US5519882A (en) | System for configuring a disk drive as a master or slave by either cable or local selection with only one jumper block or one switching device | |
| CN1377480A (en) | Computer security device for hard disc protection | |
| GB2258932A (en) | Achieving improved scsi bus control capacity | |
| JPS62114021A (en) | Back plane having back plane bus | |
| EP0889415A2 (en) | Dual voltage card connector | |
| CN105283815B (en) | Data bus module | |
| WO2006002175A1 (en) | Computer switch box | |
| US5721403A (en) | Selective circuit bypass for elevator system | |
| CN101165619A (en) | Programmable logic controller device | |
| JPH01205222A (en) | Connector sharing device | |
| WO2003009118A2 (en) | Computer multiplexor | |
| CN103138168B (en) | Cabling of an aircraft circuit breaker panel | |
| JP3657000B1 (en) | Slot machine | |
| EP1374349B1 (en) | Connection device | |
| CN200986663Y (en) | Programable controller system | |
| CN1225215A (en) | An arrangement for controlling subscriber interface circuits | |
| CN1352867A (en) | IEEE 1394 cable connector with short circuit switch | |
| US4125833A (en) | Sequence switching circuit with latching alarm | |
| CN101241383B (en) | Computer main unit supporting multi- hard disk independent startup and its accomplishing method | |
| KR100364175B1 (en) | Cyber Home Switch Hub | |
| CN101232758B (en) | Non-contact matrix switch for controlling a plurality of lighting equipments | |
| KR20030036091A (en) | Electronic apparatus with internal modems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| C10 | Entry into substantive examination | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |