WO1994013037A1 - Coding device for mechanical coding of printed circuit boards - Google Patents

Coding device for mechanical coding of printed circuit boards Download PDF

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Publication number
WO1994013037A1
WO1994013037A1 PCT/FI1993/000473 FI9300473W WO9413037A1 WO 1994013037 A1 WO1994013037 A1 WO 1994013037A1 FI 9300473 W FI9300473 W FI 9300473W WO 9413037 A1 WO9413037 A1 WO 9413037A1
Authority
WO
WIPO (PCT)
Prior art keywords
coding
coding device
printed board
mother board
ribs
Prior art date
Application number
PCT/FI1993/000473
Other languages
French (fr)
Inventor
Tapio Tuomainen
Original Assignee
Nokia Telecommunications Oy
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
Application filed by Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to AU54230/94A priority Critical patent/AU5423094A/en
Priority to GB9510593A priority patent/GB2287368B/en
Priority to DE4396104T priority patent/DE4396104T1/en
Publication of WO1994013037A1 publication Critical patent/WO1994013037A1/en
Priority to SE9501922A priority patent/SE507203C2/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1438—Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
    • H05K7/1452—Mounting of connectors; Switching; Reinforcing of back panels
    • H05K7/1455—Coding for prevention of wrong insertion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/52—Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • 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
    • H01R13/64—Means for preventing incorrect coupling

Definitions

  • Coding device for mechanical coding of printed circuit boards
  • the invention relates to a coding device for mechanical coding of printed circuit boards to be mounted on a mother board, which coding device is intended to be fastened to a printed board in the vicinity of the mounting place of a printed board connector to cooperate with a coding pin or pins to be fastened to the mother board.
  • Mechanical coding of printed circuit boards means that printed boards are prevented mechanically from being mounted on false places of a mother board, to which are fastened several printed boards resem- bling each other. If printed boards have not been coded at all, they may be mounted on false places at the assembly already or later at maintenances. The printed board may then be destroyed and it may, in the worst case, cause disturbances in a device or system concerned, e.g. in a communication system. To prevent this, methods of different kinds have been developed for mechanical coding of printed boards.
  • the coding keys may thus be pushed into each other, which means that the printed board may be mounted on the mother board in a predetermined position of the coding keys only.
  • This arrangement is hardly applicable to serial production, and it is also expensive and takes up too much space on the printed board. Further, the solution contains few possibilities of combination.
  • Another method of providing coding is a solu ⁇ tion developed by the company Molex.
  • This arrangement requires printed board and mother board connectors designed especially for this purpose.
  • the side of a printed board connector is provided with a coding comb, the teeth of which may be pushed, on certain conditions, into coding chambers provided in the side of a mother board connector.
  • the coding is performed in such a way that one tooth or several teeth are removed from the coding comb and stopping means are mounted in the respective coding chamber/chambers of the mother board connector.
  • a printed board may then be mounted on that mother board connector only in which a stopping means or several stopping means are located at that place of the coding comb from which the respective coding tooth or teeth have been re ⁇ moved. Due to its dependence on connectors, this so- lution is expensive.
  • the coding is unreli ⁇ able because of a too short stopping distance formed by the coding components.
  • the AMP company has developed a method of coding, which is based on plastic stopping means to be mounted on connector pins. Even this so ⁇ lution is dependent on connectors and thus expensive at the same time. Moreover, the stopping means take connector pins and the reliability of coding is not sufficient.
  • a further coding method known from the prior art is disclosed in CH Patent 607 542, for instance, which method, comprising coding lists to be mounted between printed board and mother board connectors and coding elements pertaining to them, resembles the solution of the Molex company described earlier.
  • the object of the present invention is to eli ⁇ minate the above drawbacks associated with the prior art solutions.
  • This is achieved by means of a coding device according to the invention, which is charac- terized in that the coding device comprises super ⁇ imposed channels substantially closed at the side facing the mother board and intended to be opened in connection with the mounting of the printed board at that coding pin or those coding pins only which are supposed to cooperate with the printed board and which are to be mounted adjacent to a mother board connector, so that each coding pin may be pushed into the coding device channel opened for this coding pin only, when the printed board connector is mounted on the mother board connector.
  • the coding device is a device, which is compatible with standard flat con ⁇ nectors and may be manufactured preferably by extrud ⁇ ing from plastic, for instance.
  • Channels for connec- tor pins are formed preferably by means of ribs or intermediate walls forming an integral structure.
  • Channels of an uncoded coding device are closed at least at the insertion side of the coding pins.
  • a particular channel or particular channels are opened in connection with the mounting of the printed board after the position of the respective coding pin or pins on the mother board has been found out, not ear ⁇ lier. If the channels are preferably open at the sides, the channel wall facing the coding pin may be opened for instance by means of pliers made for this purpose.
  • the coding costs will be advantageous thanks to the device according to the invention, because the use of this device is not limited to any particular connectors.
  • the coding device takes up hardly any useful space on the printed board and no connector pins are needed for introducing it.
  • the coding device is easy to mount and change, as the printed board using this coding device.
  • Figure 1 shows a mother board intended for mounting of printed boards
  • Figure 2 shows a perspective view of a first preferred coding device according to the invention and how the device is connected to a printed board, the mother board and connectors therein
  • Figure 3 shows a perspective view of the coding device of Figure 2 from a direction opposite to that in Figure 2
  • Figure 4 shows a further perspective view of the coding device according to the figures 2 and 3
  • Figure 5 shows a view of a second preferred coding device according to the invention, correspond ⁇ ing to the representation of Figure 2 and
  • Figure 6 shows a perspective view of the coding device according to Figure 5 from a direction oppo- site to that in Figure 5.
  • Reference numeral 10 of the drawing stands for a printed board, reference numeral 20 for a mother board and reference numeral 30 for a coding device.
  • the mother board 20 is intended to be a mount ⁇ ing board for several printed boards 10 and the cod ⁇ ing device 30 a means by which the printed board 10 will be fastened to the right place on the mother board 20.
  • the mother board 20 comprises several mother board connectors 21, to which the printed boards 10 are fastened by means of connectors 11 arranged on the printed boards.
  • the mother board 20 additionally comprises coding pins 22 between or adjacent to the connectors 21, which pins are intended to cooperate with the coding devices 30.
  • the coding device 30 is in- tended to be fastened to the side of a printed board connector 11 in such a way that the printed board connector 11 will be positioned between the printed board 10 and the coding device 30.
  • the coding device 30 is a device preferably made of a plastic material for instance by extruding, which device comprises superimposed channels 31 closed at the side facing the mother board 20, which channels are not intended to be opened until in connection with the mounting of the printed board 10 at that coding pin or those cod- ing pins 22 only which are supposed to cooperate with the printed board. Then each coding pin 22 may be pushed into the coding device 30 channel 31 opened for this coding pin only, when the printed board con ⁇ nector 11 is mounted on the mother board connector 21.
  • the coding device shall pre ⁇ ferably form a substantially integral part.
  • the coding device 30 comprises a bottom plate 32 arranged against the side of the printed board connector 11, a front edge list 33 projecting verti- cally onwards from the edge facing the mother board 20 with respect to the printed board connector 11 and left closed at the manufacture and ribs 34 and 35 arranged between the bottom plate 32 and the front edge list 33, the ribs defining between themselves said channels 31 for the coding pins 22.
  • the coding device 30 further comprises means 38 and 39 for fas ⁇ tening the coding device to the printed board 10 and the printed board connector 11 and for supporting it thereon. Every second rib 34 extends between the front edge list 33 and the rear edge of the bottom plate 32 and every second rib 35 only along a part of the breadth of the bottom plate 32.
  • the shorter ribs 34 become evenly lower from the front edge list 33 onwards and have then a triangular form seen from the side, while the longer ribs 35 are equal in height and end in a rear stiffening rib 36 running along the rear edge of the coding device 30.
  • an intermediate stiffening rib 37 runs across the longer ribs 35, whereby rib portions 35a between the inter ⁇ mediate stiffening rib 37 and the rear stiffening rib 36 are thicker than rib portions between the front edge list 33 and the intermediate stiffening rib 37.
  • the bottom plate 32, the front edge list 33, the ribs 34 and 35, the stiffening ribs 36 and 37 as well as the means 38 and 39 are made of the same material and form an integral structure.
  • Such a rib structure, en ⁇ tirely open at one side, is durable and stiff enough for the flat coding pins 22.
  • the breadth of one typical coding device is 30 mm, the height is 55 mm and the thickness projecting from the side of or from above the printed board con ⁇ nector 11 (thickness of the bottom plate 32 added with the height of the ribs 34 and 35) is 7 mm.
  • Such a coding device may contain 19 superimposed channels 31.
  • the channels 31 of this coding device 30 are opened by removing mechanically material from the front edge list 33, i.e. area 33a at the channel 31, for instance by means of pliers made for this purpose ( ot shown in the drawing) .
  • One channel or several channels 31 of the coding device 30 may be opened, and respectively, one coding pin or several coding pins 22 may be used, depending on how many coupling variations of different kinds are required.
  • a second preferred embodiment of the invention according to the figures 5 and 6 differs from the structure according to the figures 2 to 4 mainly therein that both ribs 134, 135 become evenly lower from a front edge list 133 onwards in such a way that they have a triangular form seen from the side.
  • the longer triangular ribs 135 extend to the rear edge of a bottom plate 132, while the shorter ribs 134 essen ⁇ tially correspond to the ribs 34 according to the figures 2 to 4 and extend only along a part of the breadth of the bottom plate 132.
  • the front edge of the bottom plate 132 ( Figure 6) is additionally provided with recesses 136 at channels 131, which recesses are supposed to cooper- ate with projections 23 of the coding pins 22 to li ⁇ mit the insertion distance of the coding pins 22.
  • a similar effect has been provided in the structure ac ⁇ cording to the figures 2 to 4 by shortening the front edge of the bottom plate 132 suitably.
  • the embodiment of the figures 5 and 6 has a throughout lighter structure than the embodiment of the figures 2 to 4 and is suitable for use when it is manufactured of a material durable enough or when it does not need to endure as great stresses as the embodiment according to the figures 2 to 4.
  • the invention has been described above by means of two preferred embodiments only.
  • the channels of the invention may be provided in many different ways. They may be implemented, ex ⁇ cept by means of various rib structures, e.g. in such a manner that the coding device is made to a closed box, within which are arranged separate channels by means of suitable partition walls, to which channels an entry may be opened e.g. by drilling. Detachable channel closing means are also possible, but they may raise the price of the coding device.
  • the shape of the coding pins is not limited to be flat either, but they may have a round cross-section, for instance, if they otherwise meet the requirements of durability and strength.

Abstract

The invention relates to a coding device for mechanical coding of printed circuit boards (10) to be mounted on a mother board (20), which coding device (30) is intended to be fastened to a printed board (10) in the vicinity of the mounting place of a printed board connector (11) to cooperate with a coding pin or pins (22) to be fastened to the mother board (20). The coding device (30) comprises superimposed channels (31) substantially closed at the side facing the mother board (20) and intended to be opened in connection with the mounting of the printed board (10) at that coding pin or those coding pins (22) only which are supposed to cooperate with the printed board and which are to be mounted adjacent to a mother board connector (21), so that each coding pin (22) may be pushed into the coding device (30) channel (31) opened for this coding pin only, when the printed board connector (11) is mounted on the mother board connector (21).

Description

Coding device for mechanical coding of printed circuit boards
The invention relates to a coding device for mechanical coding of printed circuit boards to be mounted on a mother board, which coding device is intended to be fastened to a printed board in the vicinity of the mounting place of a printed board connector to cooperate with a coding pin or pins to be fastened to the mother board.
Mechanical coding of printed circuit boards means that printed boards are prevented mechanically from being mounted on false places of a mother board, to which are fastened several printed boards resem- bling each other. If printed boards have not been coded at all, they may be mounted on false places at the assembly already or later at maintenances. The printed board may then be destroyed and it may, in the worst case, cause disturbances in a device or system concerned, e.g. in a communication system. To prevent this, methods of different kinds have been developed for mechanical coding of printed boards.
There are several prior art solutions. One of them is a solution developed by the company Siemens, comprising a round cross-section coding pin to be mounted by means of a screw above a mother board con¬ nector of a mother card, a cylindrical first coding key to be pushed on the coding pin and having longi¬ tudinal ribs on its outer surface, a socket box to be pushed into holes made above a printed board connec¬ tor of a printed board and a sleeve-like second cod¬ ing key to be pushed into the socket box and having in its inner surface longitudinal grooves supposed to cooperate with the ribs of the outer surface of the first coding key. The coding keys may thus be pushed into each other, which means that the printed board may be mounted on the mother board in a predetermined position of the coding keys only. This arrangement is hardly applicable to serial production, and it is also expensive and takes up too much space on the printed board. Further, the solution contains few possibilities of combination.
Another method of providing coding is a solu¬ tion developed by the company Molex. This arrangement requires printed board and mother board connectors designed especially for this purpose. The side of a printed board connector is provided with a coding comb, the teeth of which may be pushed, on certain conditions, into coding chambers provided in the side of a mother board connector. The coding is performed in such a way that one tooth or several teeth are removed from the coding comb and stopping means are mounted in the respective coding chamber/chambers of the mother board connector. A printed board may then be mounted on that mother board connector only in which a stopping means or several stopping means are located at that place of the coding comb from which the respective coding tooth or teeth have been re¬ moved. Due to its dependence on connectors, this so- lution is expensive. Moreover, the coding is unreli¬ able because of a too short stopping distance formed by the coding components.
In addition, the AMP company has developed a method of coding, which is based on plastic stopping means to be mounted on connector pins. Even this so¬ lution is dependent on connectors and thus expensive at the same time. Moreover, the stopping means take connector pins and the reliability of coding is not sufficient. A further coding method known from the prior art is disclosed in CH Patent 607 542, for instance, which method, comprising coding lists to be mounted between printed board and mother board connectors and coding elements pertaining to them, resembles the solution of the Molex company described earlier.
The object of the present invention is to eli¬ minate the above drawbacks associated with the prior art solutions. This is achieved by means of a coding device according to the invention, which is charac- terized in that the coding device comprises super¬ imposed channels substantially closed at the side facing the mother board and intended to be opened in connection with the mounting of the printed board at that coding pin or those coding pins only which are supposed to cooperate with the printed board and which are to be mounted adjacent to a mother board connector, so that each coding pin may be pushed into the coding device channel opened for this coding pin only, when the printed board connector is mounted on the mother board connector.
The coding device according to the invention is a device, which is compatible with standard flat con¬ nectors and may be manufactured preferably by extrud¬ ing from plastic, for instance. Channels for connec- tor pins are formed preferably by means of ribs or intermediate walls forming an integral structure. Channels of an uncoded coding device are closed at least at the insertion side of the coding pins. A particular channel or particular channels are opened in connection with the mounting of the printed board after the position of the respective coding pin or pins on the mother board has been found out, not ear¬ lier. If the channels are preferably open at the sides, the channel wall facing the coding pin may be opened for instance by means of pliers made for this purpose.
The coding costs will be advantageous thanks to the device according to the invention, because the use of this device is not limited to any particular connectors. The coding device takes up hardly any useful space on the printed board and no connector pins are needed for introducing it. The coding device is easy to mount and change, as the printed board using this coding device. In the following, the invention will be ex¬ plained in more detail by means of two illustrative embodiments referring to the attached drawings, in which
Figure 1 shows a mother board intended for mounting of printed boards,
Figure 2 shows a perspective view of a first preferred coding device according to the invention and how the device is connected to a printed board, the mother board and connectors therein, Figure 3 shows a perspective view of the coding device of Figure 2 from a direction opposite to that in Figure 2,
Figure 4 shows a further perspective view of the coding device according to the figures 2 and 3, Figure 5 shows a view of a second preferred coding device according to the invention, correspond¬ ing to the representation of Figure 2, and
Figure 6 shows a perspective view of the coding device according to Figure 5 from a direction oppo- site to that in Figure 5.
To begin with, the invention is explained by means of its first preferred embodiment referring to the figures 1 to 4.
Reference numeral 10 of the drawing stands for a printed board, reference numeral 20 for a mother board and reference numeral 30 for a coding device.
The mother board 20 is intended to be a mount¬ ing board for several printed boards 10 and the cod¬ ing device 30 a means by which the printed board 10 will be fastened to the right place on the mother board 20.
The mother board 20 comprises several mother board connectors 21, to which the printed boards 10 are fastened by means of connectors 11 arranged on the printed boards. The mother board 20 additionally comprises coding pins 22 between or adjacent to the connectors 21, which pins are intended to cooperate with the coding devices 30.
On the other hand,! the coding device 30 is in- tended to be fastened to the side of a printed board connector 11 in such a way that the printed board connector 11 will be positioned between the printed board 10 and the coding device 30. The coding device 30 is a device preferably made of a plastic material for instance by extruding, which device comprises superimposed channels 31 closed at the side facing the mother board 20, which channels are not intended to be opened until in connection with the mounting of the printed board 10 at that coding pin or those cod- ing pins 22 only which are supposed to cooperate with the printed board. Then each coding pin 22 may be pushed into the coding device 30 channel 31 opened for this coding pin only, when the printed board con¬ nector 11 is mounted on the mother board connector 21. Made in this manner, the coding device shall pre¬ ferably form a substantially integral part.
The coding device 30 comprises a bottom plate 32 arranged against the side of the printed board connector 11, a front edge list 33 projecting verti- cally onwards from the edge facing the mother board 20 with respect to the printed board connector 11 and left closed at the manufacture and ribs 34 and 35 arranged between the bottom plate 32 and the front edge list 33, the ribs defining between themselves said channels 31 for the coding pins 22. The coding device 30 further comprises means 38 and 39 for fas¬ tening the coding device to the printed board 10 and the printed board connector 11 and for supporting it thereon. Every second rib 34 extends between the front edge list 33 and the rear edge of the bottom plate 32 and every second rib 35 only along a part of the breadth of the bottom plate 32. The shorter ribs 34 become evenly lower from the front edge list 33 onwards and have then a triangular form seen from the side, while the longer ribs 35 are equal in height and end in a rear stiffening rib 36 running along the rear edge of the coding device 30. In addition, es¬ sentially at the middle of the coding device 30, an intermediate stiffening rib 37 runs across the longer ribs 35, whereby rib portions 35a between the inter¬ mediate stiffening rib 37 and the rear stiffening rib 36 are thicker than rib portions between the front edge list 33 and the intermediate stiffening rib 37. The bottom plate 32, the front edge list 33, the ribs 34 and 35, the stiffening ribs 36 and 37 as well as the means 38 and 39 are made of the same material and form an integral structure. Such a rib structure, en¬ tirely open at one side, is durable and stiff enough for the flat coding pins 22. The breadth of one typical coding device is 30 mm, the height is 55 mm and the thickness projecting from the side of or from above the printed board con¬ nector 11 (thickness of the bottom plate 32 added with the height of the ribs 34 and 35) is 7 mm. Such a coding device may contain 19 superimposed channels 31.
The channels 31 of this coding device 30 are opened by removing mechanically material from the front edge list 33, i.e. area 33a at the channel 31, for instance by means of pliers made for this purpose ( ot shown in the drawing) . One channel or several channels 31 of the coding device 30 may be opened, and respectively, one coding pin or several coding pins 22 may be used, depending on how many coupling variations of different kinds are required.
A second preferred embodiment of the invention according to the figures 5 and 6 differs from the structure according to the figures 2 to 4 mainly therein that both ribs 134, 135 become evenly lower from a front edge list 133 onwards in such a way that they have a triangular form seen from the side. The longer triangular ribs 135 extend to the rear edge of a bottom plate 132, while the shorter ribs 134 essen¬ tially correspond to the ribs 34 according to the figures 2 to 4 and extend only along a part of the breadth of the bottom plate 132. In this example case, the front edge of the bottom plate 132 (Figure 6) is additionally provided with recesses 136 at channels 131, which recesses are supposed to cooper- ate with projections 23 of the coding pins 22 to li¬ mit the insertion distance of the coding pins 22. A similar effect has been provided in the structure ac¬ cording to the figures 2 to 4 by shortening the front edge of the bottom plate 132 suitably. The embodiment of the figures 5 and 6 has a throughout lighter structure than the embodiment of the figures 2 to 4 and is suitable for use when it is manufactured of a material durable enough or when it does not need to endure as great stresses as the embodiment according to the figures 2 to 4. The invention has been described above by means of two preferred embodiments only. However, the one skilled in the art is capable of implementing details of the invention in several alternative manners with- in the scope of the attached claims. So, for in¬ stance, the channels of the invention may be provided in many different ways. They may be implemented, ex¬ cept by means of various rib structures, e.g. in such a manner that the coding device is made to a closed box, within which are arranged separate channels by means of suitable partition walls, to which channels an entry may be opened e.g. by drilling. Detachable channel closing means are also possible, but they may raise the price of the coding device. The shape of the coding pins is not limited to be flat either, but they may have a round cross-section, for instance, if they otherwise meet the requirements of durability and strength.

Claims

Claims :
1. A coding device for mechanical coding of printed circuit boards (10) to be mounted on a mother board (20), which coding device (30; 130) is intended to be fastened to a printed board (10) in the vicini¬ ty of the mounting place of a printed board connector (11) to cooperate with a coding pin or pins (22) to be fastened to the mother board (20), c h a r a c- t e r i z e d in that the coding device (30; 130) comprises superimposed channels (31; 131) substan¬ tially closed at the side facing the mother board (20) and intended to be opened in connection with the mounting of the printed board (10) at that coding pin or those coding pins (22) only which are supposed to cooperate with the printed board and which are to be mounted adjacent to a mother board connector (21), so that each coding pin (22) may be pushed into the cod¬ ing device (30; 130) channel (31; 131) opened for this coding pin only, when the printed board connec¬ tor (11) is mounted on the mother board connector (21).
2. A coding device according to claim 1, c h a r a c t e r i z e d in that it comprises a bottom plate (32; 132) arranged in parallel with the side of a possible printed board connector (11), an edge list (33; 133) projecting onwards from the edge of the bottom plate (32; 132) facing the mother board (20) with respect to the printed board connector (11) and ribs (34, 35; 134,135) arranged between the bot¬ tom plate and the edge list, the ribs defining be¬ tween themselves said channels (31; 131) for the cod¬ ing pins (22), and that the bottom plate (32; 132), the edge list (33; 133) and the ribs (34, 35; 134, 135) form one integral structure.
3. A coding device according to claim 2, c h a r a c t e r i z e d in that the channels (31; 131) are intended for flat coding pins (22), every second rib (35; 135) extending between the front edge list (33; 133) and the rear edge of the bottom plate (32; 132) and every second rib (34; 134) only along a part of the breadth of the bottom plate (32; 132).
4. A coding device according to claim 3, c h a r a c t e r i z e d in that the longer ribs (35) are equal in height and end in a rear stiffening rib (36) running along the rear edge of the coding device (30).
5. A coding device according to claim 4, c h a r a c t e r i z e d in that an intermediate stiffening rib (37) runs across the longer ribs (35) essentially at the middle of the coding device (30), whereby rib portions (35a) between the intermediate stiffening rib (37) and the rear stiffening rib (36) are thicker than rib portions between the front edge list (33) and the intermediate stiffening rib (37).
6. A coding device according to claim 2 or 3, c h a r a c t e r i z e d in that the ribs (134, 135) become evenly lower from the front edge list (133) onwards, so that they have a triangular form seen from the side.
PCT/FI1993/000473 1992-11-25 1993-11-11 Coding device for mechanical coding of printed circuit boards WO1994013037A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU54230/94A AU5423094A (en) 1992-11-25 1993-11-11 Coding device for mechanical coding of printed circuit boards
GB9510593A GB2287368B (en) 1992-11-25 1993-11-11 Coding device for mechanical coding of printed circuit boards
DE4396104T DE4396104T1 (en) 1992-11-25 1993-11-11 Coding device for the mechanical coding of printed circuit boards
SE9501922A SE507203C2 (en) 1992-11-25 1995-05-23 Coding device for mechanical coding of circuit boards

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925348 1992-11-25
FI925348A FI99236C (en) 1992-11-25 1992-11-25 Encoding piece for mechanical coding of circuit boards

Publications (1)

Publication Number Publication Date
WO1994013037A1 true WO1994013037A1 (en) 1994-06-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1993/000473 WO1994013037A1 (en) 1992-11-25 1993-11-11 Coding device for mechanical coding of printed circuit boards

Country Status (6)

Country Link
AU (1) AU5423094A (en)
DE (1) DE4396104T1 (en)
FI (1) FI99236C (en)
GB (1) GB2287368B (en)
SE (1) SE507203C2 (en)
WO (1) WO1994013037A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2009052305A2 (en) * 2007-10-17 2009-04-23 Be Intellectual Property, Inc. Adaptive power management system for aircraft galleys

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005023716A1 (en) * 2005-05-18 2006-11-23 E.G.O. Elektro-Gerätebau GmbH Electrical power switching unit for use with domestic equipment such as washing machine has coding lugs for correct assembly

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Publication number Priority date Publication date Assignee Title
US3200361A (en) * 1962-07-20 1965-08-10 Sperry Rand Corp Printed circuit board connector assembly
DE2455409B2 (en) * 1974-11-22 1980-12-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Coding device for multiple sockets
DE3630950A1 (en) * 1986-09-11 1988-03-24 Siemens Ag Multipole electrical plug connection having a coding device
US4772227A (en) * 1984-09-27 1988-09-20 Siemens Aktiengesellschaft Electric plug connection with a coder device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200361A (en) * 1962-07-20 1965-08-10 Sperry Rand Corp Printed circuit board connector assembly
DE2455409B2 (en) * 1974-11-22 1980-12-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Coding device for multiple sockets
US4772227A (en) * 1984-09-27 1988-09-20 Siemens Aktiengesellschaft Electric plug connection with a coder device
DE3630950A1 (en) * 1986-09-11 1988-03-24 Siemens Ag Multipole electrical plug connection having a coding device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009052305A2 (en) * 2007-10-17 2009-04-23 Be Intellectual Property, Inc. Adaptive power management system for aircraft galleys
WO2009052305A3 (en) * 2007-10-17 2009-07-09 Be Intellectual Pty Inc Adaptive power management system for aircraft galleys
US8289670B2 (en) 2007-10-17 2012-10-16 B/E Intellectual Property Adaptive power management system for aircraft galleys
US8576530B2 (en) 2007-10-17 2013-11-05 B/E Intellectual Property Adaptive power management system for aircraft galleys

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AU5423094A (en) 1994-06-22
SE9501922L (en) 1995-05-23
SE9501922D0 (en) 1995-05-23
FI99236C (en) 1997-11-10
GB9510593D0 (en) 1995-07-19
GB2287368B (en) 1996-10-09
SE507203C2 (en) 1998-04-20
GB2287368A (en) 1995-09-13
DE4396104T1 (en) 1995-11-23
FI99236B (en) 1997-07-31
FI925348A0 (en) 1992-11-25
FI925348A (en) 1994-05-26

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