CA1298373C - Data transmission bus coupler - Google Patents
Data transmission bus couplerInfo
- Publication number
- CA1298373C CA1298373C CA000570983A CA570983A CA1298373C CA 1298373 C CA1298373 C CA 1298373C CA 000570983 A CA000570983 A CA 000570983A CA 570983 A CA570983 A CA 570983A CA 1298373 C CA1298373 C CA 1298373C
- Authority
- CA
- Canada
- Prior art keywords
- coupler
- housing
- stubs
- contacts
- forming
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/04—Connectors or connections adapted for particular applications for network, e.g. LAN connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Small-Scale Networks (AREA)
Abstract
Data Transmission Bus Coupler ABSTRACT
A plug-in coupler for forming a splice between a data transmission bus of a multiplexed data trans-mission system and a plurality of stubs of the system comprises a generally flat housing having a pair of disconnectable connector portions 5 that are connected to each other within the housing by a pair of conduc-tors 7 so that an in-line splice can be formed in the data bus. The housing also has an array of contacts 6 for forming releasable connections to a number of stubs, the contacts being transformer coupled to the conductors 7 via isolation transformers 8 and resistors 9.
A plug-in coupler for forming a splice between a data transmission bus of a multiplexed data trans-mission system and a plurality of stubs of the system comprises a generally flat housing having a pair of disconnectable connector portions 5 that are connected to each other within the housing by a pair of conduc-tors 7 so that an in-line splice can be formed in the data bus. The housing also has an array of contacts 6 for forming releasable connections to a number of stubs, the contacts being transformer coupled to the conductors 7 via isolation transformers 8 and resistors 9.
Description
~29~3~3 DATA TRANSMISSION BUS COUPLER
This invention relates to the transmission of data, and especially multiplexed serial data transmission.
Such systems are increasingly becoming important for a number of applications, for example in military avionics, where data is sent to equipment in the aircraft via a single data transmission bus, or data bus, that is common to a number of items of equipment, and a branched line or stub that connects the equipment to the data bus.
According to the present invention, there is pro-vided a plug-in coupler for forming a splice between a data transmission bus of a multiplexed data trans-mission system and a plurality of stubs, whic.h compri-ses a generally flat housing having a pair of disconnectable connector portions that are connected to each other within the housing by a pair of conductors so that an in-line splice can be formed in the data bus, and an array of contacts for forming releasable connections to a plurality of stubs, the contacts being transformer coupled to the pair of conductors.
Each of the stubs is coupled to the data bus within the housing by a transformer coupling arrange-~298373
This invention relates to the transmission of data, and especially multiplexed serial data transmission.
Such systems are increasingly becoming important for a number of applications, for example in military avionics, where data is sent to equipment in the aircraft via a single data transmission bus, or data bus, that is common to a number of items of equipment, and a branched line or stub that connects the equipment to the data bus.
According to the present invention, there is pro-vided a plug-in coupler for forming a splice between a data transmission bus of a multiplexed data trans-mission system and a plurality of stubs, whic.h compri-ses a generally flat housing having a pair of disconnectable connector portions that are connected to each other within the housing by a pair of conductors so that an in-line splice can be formed in the data bus, and an array of contacts for forming releasable connections to a plurality of stubs, the contacts being transformer coupled to the pair of conductors.
Each of the stubs is coupled to the data bus within the housing by a transformer coupling arrange-~298373
2 - FP039 ment which usually comprises an isolation transformer and a resistance of about 50 ohms on each line between the isolation transformer and the data bus so that a short circuit in one of the stubs, for example caused by damage to the equipment, will not affect the remainder of the data transmission system.
The coupler according to the invention has the advantage that it is particularly compact compared with known systems that use a coupler for individual stubs.
In addition the coupler is particularly versatile in that it can easily be removed and changed to accom-modate alteration in the equipment that is controlled by the system, and can be removed for testing or repla-cement. The coupler may be made, for example, in the form of a conventional plug-in rectangular connector having a coupler extension mounted on an end thereof.
The connector may then be mated with a corresponding rectangular connector e.g. on opposite sides of a bulk-head in a conventional manner. The fact that the coupler can be made in such a small size has the addi-tional advantage that there is a greater choice of location of the coupler in the aircraft. For example, one problem with conventional databus systems is that, although the main databus can be balanced e.g. by appropriate impedance connections at each end, the con-nection of stub lines to the databus disturbs the balance, and this disturbance is worsened as the stub length is increased. By using databus couplers according to the invention it is possible for the main databus to extend in a relatively convoluted path so that it passes near (e.g. less than about 6m and pre-ferably less than 3m) to the equipment with a con-sequent reduction in stub length. For example in -` 1298373 _ 3 _ FP039 military aircraft it is possible to pass the databus along the aircraft wings and provide a coupler in the region of the missiles or other equipment rather than to provide a long stub from a coupler in the centre of the aircraft fuselage.
In one form of coupler according to the invention the disconnectable connector portions and the contacts for forming connections to the stubs are arranged together as a single array in a connecting face of the housing so that the stubs and the data bus may be disconnected in a single operation. This form of coupler is appropriate for use where the data bus is provided for example in the equipment racking system or where a connection can be made to the data bus via the racking system. In an alternative form of coupler the contacts for forming connections to the stubs are arranged together as a single array in a connecting face of the housing and the disconnectable connector portions for the data bus are located at separate points on the housing spaced apart from the connecting face of the housing. This form of coupler is appropriate where, for example equipment or racking for the equipment is to be installed and the data bus extends outside the equipment or racking. The connec-tor portions for the data bus are preferably arranged on opposite sides of the housing substantially in line with each other, in order to simplify the path of the data bus.
If, as is often the case, it is desired to screen the cables and the interior of the coupler from electromagnetic interference, this may easily be achieved, for example by the arrangement described in 12983~3 4 _ FP039 our copending European patent application No.
88305402.5.
The coupler will normally contain connection con-tacts for at least 4 stubs, preferably at least 6 stubs but normally not more than 12 stubs and especially not more than 8 stubs.
Two connectors in accordance with the invention will now be described by way of example for reference to the accompanying drawings, in which:
igure 1 is an isometric view of one form of coupler according the the invention;
igure 2 is a schematic circuit diagram of the coupler of figure 1;
Figure 3 is an exploded view of the coupler of figure 1 showing the electrical components;
igure 4 is a perspective view of another form of coupler according to the invention; and igure 5 is a circuit diagram of the connector of figure 4.
Referring initially to figures 1 to 3 of the accompanying drawings, a coupler 1 for forming a splice between a data bus of a multiplexed serial data transmission system comprises a generally flat die cast aluminium housing 2 that is formed in three parts, a top and bottom shell half 2 and 3, and a connector part 4 which encloses an array (not shown) of male or female 1~98373 _ 5 _ FP039 contact elements for forming a push fit electrical con-nection.
The coupler contains an array of eight coaxial male or female contacts 5 and 6 each comprising a pair of contact elements arranged coaxially, the two con-tacts 5 being connected together within the housing by conductors 7 so that the contacts 5 can be connected to the main data bus in order to form an in-line splice in the data bus when the coupler is pushed into the socket. The six contacts 6 are each connected to the conductors 7 via isolation transformers 8 and 52 ohm resistors 9 mounted on a printed circuit board 10.
The connector part is provided with side lugs 11 containing screw-threaded bolts 12 for firmly fixing the connector part 4 of the coupler to a bulkhead, racking tray or the like that contains a mating connec-tor socket.
An alternative form of coupler is shown in figures 4 and 5. This form of coupler has a flat housing comprising top and bottom shell halves 2 and 3 and con-héctor part 4 which encloses an array (not shown) of male or female contact elements for forming a push-fit electrica~ connection.
The housing has two disconnectable connector por-tions 13 and 14 that are connected to each other within the housing by conductors 7 so that an in-line splice can be formed in a data bus that extends outside the bulkhead, equipment or equipment racking system. In addition, the coupler has an array of eight coaxial male or female contacts 6 that are connected to the ~9~3373 conductors 7 via isolation transformers 8 and resistors 9 which are mounted on a printed circuit board (not shown) in the same manner as in figure 3.
As with the coupler shown in figure 1, side lugs 11 containing screw-threaded bolts 12 are provided for fixing the connector part 4 to a bulkhead or racking tray.
The coupler according to the invention has the advantage that it is particularly compact compared with known systems that use a coupler for individual stubs.
In addition the coupler is particularly versatile in that it can easily be removed and changed to accom-modate alteration in the equipment that is controlled by the system, and can be removed for testing or repla-cement. The coupler may be made, for example, in the form of a conventional plug-in rectangular connector having a coupler extension mounted on an end thereof.
The connector may then be mated with a corresponding rectangular connector e.g. on opposite sides of a bulk-head in a conventional manner. The fact that the coupler can be made in such a small size has the addi-tional advantage that there is a greater choice of location of the coupler in the aircraft. For example, one problem with conventional databus systems is that, although the main databus can be balanced e.g. by appropriate impedance connections at each end, the con-nection of stub lines to the databus disturbs the balance, and this disturbance is worsened as the stub length is increased. By using databus couplers according to the invention it is possible for the main databus to extend in a relatively convoluted path so that it passes near (e.g. less than about 6m and pre-ferably less than 3m) to the equipment with a con-sequent reduction in stub length. For example in -` 1298373 _ 3 _ FP039 military aircraft it is possible to pass the databus along the aircraft wings and provide a coupler in the region of the missiles or other equipment rather than to provide a long stub from a coupler in the centre of the aircraft fuselage.
In one form of coupler according to the invention the disconnectable connector portions and the contacts for forming connections to the stubs are arranged together as a single array in a connecting face of the housing so that the stubs and the data bus may be disconnected in a single operation. This form of coupler is appropriate for use where the data bus is provided for example in the equipment racking system or where a connection can be made to the data bus via the racking system. In an alternative form of coupler the contacts for forming connections to the stubs are arranged together as a single array in a connecting face of the housing and the disconnectable connector portions for the data bus are located at separate points on the housing spaced apart from the connecting face of the housing. This form of coupler is appropriate where, for example equipment or racking for the equipment is to be installed and the data bus extends outside the equipment or racking. The connec-tor portions for the data bus are preferably arranged on opposite sides of the housing substantially in line with each other, in order to simplify the path of the data bus.
If, as is often the case, it is desired to screen the cables and the interior of the coupler from electromagnetic interference, this may easily be achieved, for example by the arrangement described in 12983~3 4 _ FP039 our copending European patent application No.
88305402.5.
The coupler will normally contain connection con-tacts for at least 4 stubs, preferably at least 6 stubs but normally not more than 12 stubs and especially not more than 8 stubs.
Two connectors in accordance with the invention will now be described by way of example for reference to the accompanying drawings, in which:
igure 1 is an isometric view of one form of coupler according the the invention;
igure 2 is a schematic circuit diagram of the coupler of figure 1;
Figure 3 is an exploded view of the coupler of figure 1 showing the electrical components;
igure 4 is a perspective view of another form of coupler according to the invention; and igure 5 is a circuit diagram of the connector of figure 4.
Referring initially to figures 1 to 3 of the accompanying drawings, a coupler 1 for forming a splice between a data bus of a multiplexed serial data transmission system comprises a generally flat die cast aluminium housing 2 that is formed in three parts, a top and bottom shell half 2 and 3, and a connector part 4 which encloses an array (not shown) of male or female 1~98373 _ 5 _ FP039 contact elements for forming a push fit electrical con-nection.
The coupler contains an array of eight coaxial male or female contacts 5 and 6 each comprising a pair of contact elements arranged coaxially, the two con-tacts 5 being connected together within the housing by conductors 7 so that the contacts 5 can be connected to the main data bus in order to form an in-line splice in the data bus when the coupler is pushed into the socket. The six contacts 6 are each connected to the conductors 7 via isolation transformers 8 and 52 ohm resistors 9 mounted on a printed circuit board 10.
The connector part is provided with side lugs 11 containing screw-threaded bolts 12 for firmly fixing the connector part 4 of the coupler to a bulkhead, racking tray or the like that contains a mating connec-tor socket.
An alternative form of coupler is shown in figures 4 and 5. This form of coupler has a flat housing comprising top and bottom shell halves 2 and 3 and con-héctor part 4 which encloses an array (not shown) of male or female contact elements for forming a push-fit electrica~ connection.
The housing has two disconnectable connector por-tions 13 and 14 that are connected to each other within the housing by conductors 7 so that an in-line splice can be formed in a data bus that extends outside the bulkhead, equipment or equipment racking system. In addition, the coupler has an array of eight coaxial male or female contacts 6 that are connected to the ~9~3373 conductors 7 via isolation transformers 8 and resistors 9 which are mounted on a printed circuit board (not shown) in the same manner as in figure 3.
As with the coupler shown in figure 1, side lugs 11 containing screw-threaded bolts 12 are provided for fixing the connector part 4 to a bulkhead or racking tray.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. A plug-in coupler for forming a splice between a data transmission bus of a multiplexed data trans-mission system and a plurality of stubs, which compri-ses a generally flat housing having a pair of disconnectable connector portions that are connected to each other within the housing by a pair of conductors so that an in-line splice can be formed in the data bus, and an array of contacts for forming releasable connections to a plurality of stubs, the contacts being transformer coupled to the pair of conductors.
2. A coupler as claimed in claim 1, wherein the disconnectable connector portions and the contacts for forming connections to the stubs are arranged together as a single array in a connecting face of the housing.
3. A coupler as claimed in claim 1, wherein the contacts for forming the connections to the stubs are arranged as a single array in a connecting face of the housing and the disconnectable connector portions are located at separate points on the housing spaced apart from the connecting face of the housing.
4. A coupler as claimed in claim 3, wherein the connector portions are arranged on opposite sides of the housing substantially in line with each other.
5. A coupler as claimed in claim 1, which contains connection contacts for at least 4 stubs.
6. A coupler as claimed in claim 1, which contains connection contacts for up to 12 stubs.
7. A coupler as claimed in claim 5 or claim 6, which contains connection contacts for from 6 to 10 stubs.
* * * * * *
* * * * * *
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB878715742A GB8715742D0 (en) | 1987-07-03 | 1987-07-03 | Data transmission bus coupler |
| GB8715742 | 1987-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1298373C true CA1298373C (en) | 1992-03-31 |
Family
ID=10620079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000570983A Expired - Lifetime CA1298373C (en) | 1987-07-03 | 1988-06-30 | Data transmission bus coupler |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0297865A3 (en) |
| JP (1) | JPS6430185A (en) |
| CA (1) | CA1298373C (en) |
| GB (1) | GB8715742D0 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0473336B1 (en) * | 1990-08-31 | 1996-05-01 | The Whitaker Corporation | Data current coupler |
| US5241219A (en) * | 1991-12-11 | 1993-08-31 | Amphenol Corporation | Current mode coupler |
| FR2735287B1 (en) * | 1995-06-08 | 1997-07-18 | Framatome Connectors France | ELECTROMAGNETIC COUPLER STRUCTURE FOR CONTINUOUS BUS |
| DE19607971C2 (en) * | 1996-03-01 | 1998-01-02 | Gore W L & Ass Gmbh | Line coupler |
| FR2750219B1 (en) * | 1996-06-25 | 1998-08-21 | Framatome Connectors France | OPTICAL BUS WITH MAGNETIC COUPLING BOX |
| EP1525608B1 (en) * | 2002-08-01 | 2014-12-24 | Bell Helicopter Textron Inc. | Network bus coupler and system |
| JP5048335B2 (en) | 2004-09-28 | 2012-10-17 | 株式会社 多自然テクノワークス | Fine bubble generator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT243328B (en) * | 1963-12-10 | 1965-11-10 | Fuba Antennenwerke Hans Kolbe | Master line distributor for community antenna systems |
| DE3513482A1 (en) * | 1984-02-14 | 1986-12-04 | Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen | High-frequency distribution device |
| US4682325A (en) * | 1984-12-27 | 1987-07-21 | Ncr Corporation | System for selectively coupling a plurality of stations into a single communications path |
-
1987
- 1987-07-03 GB GB878715742A patent/GB8715742D0/en active Pending
-
1988
- 1988-06-30 EP EP88305940A patent/EP0297865A3/en not_active Ceased
- 1988-06-30 CA CA000570983A patent/CA1298373C/en not_active Expired - Lifetime
- 1988-07-01 JP JP16578688A patent/JPS6430185A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6430185A (en) | 1989-02-01 |
| EP0297865A3 (en) | 1990-05-02 |
| GB8715742D0 (en) | 1987-08-12 |
| EP0297865A2 (en) | 1989-01-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 19980331 |