PH26629A

PH26629A - Protective plug for connectors or disconnector banks

Info

Publication number: PH26629A
Application number: PH38064A
Authority: PH
Inventors: Klaus-Peter Achting; Gunter Hegner
Original assignee: Krone Ag
Priority date: 1988-04-20
Filing date: 1989-01-18
Publication date: 1992-08-19
Also published as: ZA89510B; TR24040A; DK21089D0; AU619269B2; MX165056B; JPH01313863A; FI94577C; IE63161B1; AR240527A1; UA15535A; DK170191B1; BR8901840A; EP0338187A2; EG18841A; IE890117L; DE3813889C1; FI890224A; NO174608B; NO174608C; IL89277A

Description

a ~—

CE PROTECTIVE PLUG FOR CONNECTOR i GS » = ) 2 to

OR DISCONNECTOR BANKS A & - or Sz

HI ~ ' t tas

BACKGROUND - :

Bu . The invention relates to a protectivve plug for connector or dieconnector banks of telecommunication systems provided with a collective earth connection according to the : preamble of claim 1. + A protective plug of the mentioned species is : : ! \ 19 known. . This protective plug comprises two half 3 : ghells of housing, in the interior of which a

Cor . protective hybrid with two parallel conductive : , _ pathe is arranged. The conductive paths are Co , connected over conductor contacts with the a-b wires or a - Db’ wires, Treep., of the . telecommunication line. Further, overvoltage : suppressors arranged side-by-side are provided

Co : being held between conductive pathe of the ! : protective hybrid and an earthing sheet. the : . ‘20 earthing sheet arranged underneath the oo protective hybride comprises for holding the oo ‘iy by - oe ! , - . : .

R. Cu ; Co :

Sh Te Po , . Ct overvoltage suppressors two resilient sheet- metal tongues being angled to form U-shaped clamps laterally to the longitudinal eides of the earthing sheet. In order to connect the overvoltage BUPPressors to earth, two additional sheet-metal tongues are required. , these sheet-metal tongues comprise one leg each being spaced relative to the conductive paths.

It is dieadvantageous, with this protective 19 plug, that by the arrangement of two eide-by- side overvoltage suppresgeors and by the earthing sheet including several eheet-metal tongues, the width and the thicknese of the housing are increased considerably.

When inserting the protective plug into a connector or disconnector bank, thus the wiring side of the bank is hidden euch that for connecting or diegconnecting (wiring) cable wires, firet the protective plug has to be pulled out. Another disadvantage is that the houeing of the protective plug is formed ae two-piece housing. - 2 _ i

The invention 'is based, therefore, on the . object to provide a protectivve plug of the : : aforementioned species, the housing of which is as small as poesible and in which the cables connected on the wiring eide of a connector or . disconnector bank are accesslble even after insertion of the protectivve plug.

The solution for this object results from the characterizing features of claim 1. The - 19 overvoltage suppressors are contacted with the

Co collective earth connection only after mounting

EE : | the protegtive plug on a connector. or - a _ disconnector bank, thus an earth connection : I a SEE being formed. According to the invention, the

LT RE | 15 collective earth connection is arranged outside , the housing of the protective plug, thus the ! housing “being substantially reduced in elze.

Co : : By reducing the housing size of the protectivve ’ plug, the cable wires connected on the wiring ; 20 side of the connector or disconnector bank are . accesslble even after plugging the protective ' plug on euch that wiring operations, e.g. 3. ¢ } ’ ) i : , oo loosening cable wires connected already, is } possible even without removing the protective rlug. Furthermore, the protective plug is constituted of a one-piece housing such that it can be manufactured much more economically. . Further advantagesous embodiments of the invention result from the subclaimes.

Particular attention should be directed to the embodiment according to claim 8, 7 and 8, } wherein the luge of the collective earth connection for contacting the overvoltage

BUPPressors exhibit a short length only.

In the following, the invention is described in more detail based on several embodiments of =a protective plug. There are:

Fig. 1 =a longitudinal eection through the protective plug inserted into a connector bank in the first embodimente,

. ..

Fig. 2 the main view of the protective plug,

Fig. 3 a cross section according to line III-.

III,

Fig. 4 a cross section according to line III- }

III with collective earth connection,

Fig. 5 a perspective view of the protective plug in the second e3mbodiment with collective earth connection, connector bank and mounting bracket, .

Fig. 6 a longitudinal section of the = protective plug inserted into a connector bank i in the second embodiment, : oo Fig. 7 the rear view of the protective plug;

Fig. 8 a longitudinal section of the protective plug, - : CL Co

I . Cs g Lr eo bo ! nL L to Co adios oa rma . :

Fig. 9 the main view of the protective plug,

Fig. 19 a croes section according to line X-X,

Fig. 11 =» cross section according to line IX-

IX,

Fig. 12 a longitudinal section of the protective plug in the third embodiments,

Fig. 13 the rear view of the collective earth : connection with plugged-on rrotective plug,

Fig. 14 a longitudinal gection of the 12 protective plug,

Fig. 15 the main view of the protective plug,

Fig. 16 a croes section according to line XVI-

XVI, .

Fig. 17 the main view of the protective plug of the fourth embodiments, and - B -

} Fig. 18 =a longitudinal section according to line XVIII-XVIII.

The protective plug 1 consists of a one-piece plastic housing 2, the fornt side 19 of the housing 2 being formed open. This front eide is closed by inserting a lug 11 of a collective earth connection 5 into an insertion oo | channel 48 or by a sheet-metal part 50, as will . still be explained later in detail. a 19 In the interiror 12 of the housing 2, “two i strip-type conductor contacts 13, 14 of a metal oo - i } material are inserted, the ends 15, 16 of which oo ; | ‘being advanced towards outeide from the housing

SE BN | 2 of the protective plug 1 and being fixed by :

CT 15 holding peices 49 in the housing 2. These ends - | 15, 16 represent together with a plastic plece : : I arranged between the ends 15, 16 and formed on the housing 1 the insertion section 18 of" the protective plug 1. The plastic piece 17 ’ includes, here, a latch 43.

The sections of the conductor contacts 13, 14 arranged in the housing 1 are inserted loosely in guide grooves 21, 22 and serve for contacting overvoltage suppressors 3. The two sections of the conductor contacts 13, 14 arranged in the housing 1 are shaped differently.

The conductor contact 13 ie U-shaped, and the conductor contact 14 ie S-shaped, the two bent.— 19 off ends 19, 20 of the conductor contacts 13, 14 being received in a guide groove 23 extending in parallel between the guide grooves 21, 22.

The two ends 19, 20 of the conductor contacts 13, 14 are, further, bent off rectangularly in direction of the open front side 19 to form ghort-circulating bridges 25, 26. The ende of the ehort-circuiting bridges 25, 26 engage in the rest position the insertion channel 48. 29 The eectione of the conductor contacts 13, 14 arranged in the hous ing 1 are spring-loaded such that they are pressed-in only after insertion of the overvoltage suppressors 3 into the gulde grooves 21, 22 and 23. : 5 The overvoliage suppressors 3 are inserted into the . protective plug 1 from the open front side 1@ and rest resiliently with one connection 29 : against a melt bead 32 inserted between the : conductor contacte 13, 14 and the overvoltage

C19 suppressors 3. By the resilient positioning, a safe contacting is achieved. } © On the other pole side 28, the overvoltage . = = suppressor 3 in the first embodiment according ; Co to Figs. 1 to 4 is held ae countersupport - by } 15 the resilient latch hooks 6, 7 arranged at the longitudinal sides 8 of the housing and is, BE ’ - | thue, fixed in the housing 2 of the protective oo plug 1. The ends 32 of the latch hooks 6, 7

IE are directed towarde each other to the

Lo 20 longitudinal axie 9 of the housing 2. oo .

Co -9- | a : ’

In the second embodiment according to Fige. 5 to 11, the latch hooke B, 7 are srranged centrally on the longituidnsl axis 9, on whixh, additionally, a central piece 33 is provided.

The central plece 33 comprises two clampling edges 34 for both-sides contact to the overvoltage suppressors 3 and a guide piece 35 forguiding the luge 11 of the collectivve earth connection 5, as will still be described later . 12 in detail. The overvoltage suppressors 3 are, thug, held on both sides by a latch hook 6, 7 : and by the clamping edge 34 of the central piece 33 in the housing 2 of the protective plug 1.

In the third embodimentr (Figs. 12 to 18), the overvoltage suppressors 3 are held. in the housing 2 by shoulder pieces 24. The shoulder pleces 24 engage inte the open front side 19, : for the two overvoltagse suppressors 3 two shoulder pieces 24 each being provided.

In the fourth embodimente (Figs. 17 and 18),

the overvoltage suppressors 3 are held in the housing 2 by a sheet-metal part 5@ being of U- shaped cross section with rectangularly bent - off side walls 51. The side walle 51 comprise

So 5 openings 52 into which engage latch hooks 54 arranged at the two narrow sides 45 of the housing 2 and fix, thus, the sheet-metal part . 58 at the housing 2. By the sheet-metal part 5@, the open front side 18 of the protective plug \ is closed. .Againet the inside 55 of the sheet-metal part 50 rest the pole sides 28 of ~~ the overvoltage suppressors 3, the outglde 55 of the sheet-metal part 50 is turned towards ) | the 1ineertion channel 48. The overvoltage suppressors 3 are, thus, connected electrically . to the sheet-metal part 53. The inside 55 of : the sheet-metal part 50 serves, further, as - contact ~ gurface for the gehort-circuiting bridaees 25, 26.

In the following, the construction and the plugging-on of the protective plug 1 on ‘the connector or disconnector bank 41g explained

I § 3 .

: * in more detail.

According to Fig. 5, the connector or disconnector bank 4 made of plastic is plugged on lugs 37 of a metal mounting bracket 36 connected to an earth line and 1s engaged therewith. Such a connector or disconnector bank to be latched on a mounting bracket 36 consists of a lower part and of an upper par? latched therewith. At the connector or 12 disconnector bank, at the one side (cable side) the cable wires 38 coming from the subscribers, and on the other side (wiring eide) the wires 39 leading to exchange installations are connected to insulation dieplacement contact pleceg 489, 41 disposed in two rows. The insulation dieplacement <ontact piece 49 of the one row is connected over a fork-type contact plece 47 to the insulation displacement contact piece 41 of the other row.

In parallel to the ¢onnector or disconnector bank 4, a metal collective earth connection 5 : ig plugged on. The collective earth connection comprises at the front sides two fork-type contact pleces 57 engaging over the lugs 37 of the mounting bracket 36 and connecting, thus, : the collective earth connection 6 electrically 5 to the mounting bracket 36.

The collective earth connection 5 comprises several lugs 11 with interposed slots 42. Per double wire 9a-b wire), one lug 11 ie provided. oo In cage an overvoltage protection is required

Co 19 for the cable wire 38 connected to the oo connector or disconnector bank 4, then for each - cable wire one protective plug 1 ie inserted . into the bank 4 between the two rows of. } '

Co insulation dieplacement contacte 49, 41 into . Co 15 the fork-type contact 47. The latch 43 of the " = : - insertion section 18 of the protective plug 1 ! Co enEagen, here, into the: bank a. The fork-type + oo , contacts 47 engage over the conductor contact

LL - | ends 15, 16 euch that the cable wires 38, 39 - CL 20 are connected electrically with the conductor : . oo contacts 13, 14. One lug 11 each of the oo - 13 -

collective earth connection engages into one insertion channel 48 of a protectivve plug 1.

In the firet embodiment of the protectivve plug 1 (Fige. 1 to 4), the luge 11 press the hooks 6, 7 holding the overvoltage suppreescre 3 away ~- as shown in Fig. 4 - and contact the one pole side 28 of the overvoltage euppressors 3 being, thus, connected to earth. The overvoltage suppressors 3 are pressed hy the resilient 19 conductor aontact pleces 13, 14 against the luge 11 of the collective earth connection 5, thus a safe contacting hetween the lugs 11 snd the pole side Z8 of the overvoltage suppressors 3 being mschieved. When pulling the protective plug 1 out off the connector or disconnector bank 4, the latch hooks B, 7 engsge =sgain behind the one ploe elde 28 of the overvoltage suppressors 3 and fix them again in the housing 2 of the protective plug 1. :

In the second embodiment of the protective pluf (Figs. 5 to 11), the lugs 11 cover one half

. each of the front eide 18 of the protective plug 1 guch. that the slot 42 disposed between the lugs 11 extends centrally on the longitudinal axis 9 of the protective plug 1 and receives the latch hooks 6, 7 and the guide piece 35 of the central piece 33. For a better guiding of the lugs 11, two additional guide pleces 44 are arranged at the front side 10 ‘of the narrow sides 4b. 19 The the third embodiment (Figs. 12 to 16), the lugs are, when inserting sthe protective plug 1 into the insertion channel 48, pressed under ' the shoulder pleces 24, as shown in Fig. 12.

In order to facilitate the insertion, the lugs 11 are, in this embodiment, glightly bent off + : at the front side 46. | :

In the fourth embodiment (Figs. 17 and 18), the oo lugs 11 are provided with a shorter length relativve to the embodiments described oo previously, as the lug 11 in this embodiment needs only be connected electrically with the Co sheet -metal part HA. For gniding the Ing 11, one guide angle 53 ench ie provided at the longitudinal elded 8 of the housing 2 guch that in the ingertion channel 48 the 1g 11 of the collective earth connection 5 16 arranged between the guide angles 53 and the sheet-metal part 50.

The case geyveral protective plugs 1 are connected gide-by-side at the longitudinal 19 sides 8, Aa protective plug bank 31 is formed.

In the following, the overvoltage CAaee le briefly deecribed. In «ase an overvoltage occurs, the overvoltage or the overcurrent, resp. , ie conducted over the cable wires 38, 39, the itnegulation displacement contacts 49, 41, the fork-type contact 47, the conductor . contacts 13, 14, the melt bead 3@ to the one pole side 29 of the overvoltage suppressor 3.

The overveltage suppressor 3 filled with =a noble gas ignites, thug the overvoltage being conducted to the other pole 28 of. the : overvoltage suppressor 3 being connected : electrically with the collectivve earth connection 5. The overvoltage ie, thus, conducted over the fork-type contacte 41 and B the collective earth connection 5 to the mounting bracket 36 being connected to an earth line. .

In case of a permanent ignition of the 19 overvoltage suppressor 3, the melt bead 30 will melt because of the developing heat, thereby : : the resillent short-circuiting bridge 25, 26 ! contacting the lug 11 of the collective earth ) connection 5 or the sheet-metal part 50 oo t15 connected to the collective earth connection i nC and short-circuiting the overvoltage Co

ST | CL suppressor 3. (fail-safe-behaviour). CA

Cv - descruction of the protective plug 1 16 thus co prevented. oo : - 17 - ro

Lo .

SUMMARY.

PROTECTIVE PLUG FOR CONNECTOR

OR DISCONNECTION. BANKS

BACKGROUND.

The invention relates to a protective plug (1) for connector or dieconnector banks (4) of telecommunication systems provided with a collective earth connection (5), comprising a housing 92) with overvoltage guppresesors 93) 19 and conductor contacte (13, 14).

In order to provide a protectivve plug 91), for which the housing sise is as small as possible gnch that the cables 933) wired on the wiring side of the connector and disconnector bank (4) are acceselble even with plugged-on protective plug (1), is in the protective plug (1) an inrertion channel 948) provided extending al;ong the one pole side (2B) of the overvoltege BUPPressor 923). The collective earth connection (5) is provided with = lug - 18 -

J

(11) engaging into the insertion channel 948)

Co for eacth connection of the overvoltage suppressor (23) (Fig. 5). o Cn aN oo - 19 -

List of references

Protective plug for connector or disconnactor banks 1 protective plug 2 housing 3 overvoliage suppressors 4 connector or disconnector bank . 5 collective earth 6, 7 hooks 19 8 longitudinal sides 9 longitudinal axie front side 11 lugs 12 interior 16 13, 14 conductor contache 15, 18 condnator contact paths 17 plastic plece 18 insertion section 19, 20 other end 21, 22, 23 guide groove 24 shoulder piece 25, 26 short-circuiting bridges

27 bottom side 28, 29 pole side 32 melt bead 31 protective plug bank . oo = 32 ende of latch hooks 33 central piece 34 clamping edge 35 guide piece 36 mounting bracket 19 37 lugs 38 cable wires 39 wires : 49 insulation displacement contacts 41 fork-type contacts o 42 slots

Co 43 latch - 44 guide piece a 45 narrow side : oo : 46 front side 47 fork-type contact oo 48 insertion channel 49 holding pieces 50 sheet-metal part ee 51 slide walle 52 openings

Gi guide angle 54 latch hook 55 ingide 56 | outside

Claims

Patent claims . 1, A protective plug for connector or } disconnector banks of telecommunication systems provided with a collective earth connection, comprising a . housing with overvoltage suppressors . and’ conductor contacts, characterized by that the housing (2) includes an insertion channel (48) extending along one pole side (28) of the overvoltage suppressors, and that the collective earth connection (5) is provided with a lug (11) engaging into the } insertion channel (48) for earth connection of the overvoltage suppressors. oo

: 2. A protective plug according to claim 1,

oo. 15 characterized by that the conductor contacts : (13, 14) include short-circuiting bridges (25, 26) engaging, after a melt bead (30) being molten, into the insertion channel (48).

3. a protective plug according to claim 1; characterized by that each overvoltage - 23 - oo

\ .

DAY D660) re’ of fae OL guppressor (3) ie held in clamp-type manner by two resilient hooks (6, 7) in the housing (2) of the protective plug (1).

4. A protective plug mccording to claim 3, characterized by that the resilient hooks 96, 7) are arranged at the longitudinal sides 98) of the housing of the protective plug 91).

5. a protectivve plug according to claim 3, characterized by that the resilient hooks 96, 7) are directed towards each other on the longitudinal axis (9) of the rrotective plug

(1).

6. a protective plug according to claim 1, characterized by that the housing (2) comprises along the pole sides (28) of the overvoeltage ) suppressors (3) a gheet-metal part (5@) against which rest the ploe eides 928) of the overvoltage suppressors (3).

T. A protective plug according to claim 6,

characterized by that the gheet-metal part (50) : ‘ts provided with openinge (52), into which engage the latch hooks (54) arranged on the : narrow sldes (48) of the housing (2).

8. A proteective plug according to claim 6, oo characterized by that the ineide (55) of the gsheet-metal part (50) serves as contact surface for the short-circulating bridges (25, 26) and for the pole sides (28) of the overvoltage suppressors (3), and that the outside (26) of the sheet-metal part (50) serves as contact ot gurface for the lug (11) of the collective i "earth connection (5). or : Sree Se vey A

9. A protective plug according to claim 1, CL : 1% characterized by that the overvoltage suppressors (3) are arranged in a row on the longitudinal axis (8) of the housing (2).

19. A protective plug according to claim 1, characterized by that several protective plugs (1) are formed side-by-side ae protective plug bank (31). - 25 =~ 4

{ . i