CA1037140A - Identification member for electrical terminals - Google Patents
Identification member for electrical terminalsInfo
- Publication number
- CA1037140A CA1037140A CA250,840A CA250840A CA1037140A CA 1037140 A CA1037140 A CA 1037140A CA 250840 A CA250840 A CA 250840A CA 1037140 A CA1037140 A CA 1037140A
- Authority
- CA
- Canada
- Prior art keywords
- identification member
- plates
- plate
- screw
- legs
- 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
Links
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An identification member for attachment to an uninsulated electrical terminal comprising a metal sleeve and a clamping screw consists of two plates of insulating material secured face to face by mating projections and recesses in the plates, each plate having a pair of legs with detent teeth for engaging the ends of the sleeves, and a recess to receive an identifying plate or tag, the mating faces of the plates containing matching recesses forming a bore for the screw.
An identification member for attachment to an uninsulated electrical terminal comprising a metal sleeve and a clamping screw consists of two plates of insulating material secured face to face by mating projections and recesses in the plates, each plate having a pair of legs with detent teeth for engaging the ends of the sleeves, and a recess to receive an identifying plate or tag, the mating faces of the plates containing matching recesses forming a bore for the screw.
Description
1~37~40 T~IS INVI~IQ~ rela~es to an id~ntification member adapted to be attached to an uni~eulated electrical terminal comprising a metal sleeve and a cl~mping screw located in a wall of the sleeve for clamping a conductor inserte~ irto the sleeve.
U~insula~ed screw-clampIng terminal slee~e~ are commonly used in electrical installations for making eaI~h or neutral connections to bus bars. ~o enable individual terminals to be reRdi}y identified, identification members are sometimes clipped onto the sleeves (German Patent ~pecification O.S 240208?). However, the integral construction used means that it is not possible to incorporate colour cod~ng for identifying the terminal as an earth connection, using the common green/~ellow coding 1~ for earth co~nections. Also, in the case of some forms of identification member, the position of the identification-carrying side of the member depends on t~e diameter of the conductor ~German Specification O.S 24162~1). Fbrthermore, existing identification members cannot readily be attached to previou~ly installed terminals.
~ he ob~ect of the present in~ention is to proYide an identification member capable ofb~ng attached to an ~ninsulated electrical terminal, which member is simple to ms~ufacture and use and avoids the above-~entioned disadvantages of existing identification ~ëmbers, and in particular can readily be m~ufactured in two colour8 and csn be clipped onto an alread~ installed terminal.
6~
i037140 The present invention resides in ~n idcntification member ror attachment to an uninsulatea electrical terminal comprising a metal ~leeve and a clamping screw located in a wall thereof, which identification member consists of two plates of insulating material provided with means for securing the pl~es together face to face, each of the two mating face~ containing a recess exten~ing thereacross to accommodate the clamping screw, at lea~t one plate having a pair of generally parallel laterall~ spaced legs at opposite sides thereof and retaining detent members on the legs for engaging in the ends of a said sleeve of a terminal to retain the identification member thereon, at least one recess being provided in that side of each plate that faces away from the legs, adapted to receive an identifying plate or tag.
~ Preferably, each said plate is provided with a saia ¦ pair of legs, and in general the two plates will be of ;~l substantially identical shape and dimension~.
~he two plates can readily be made of material of difrerent colours or provided with markings Or different ~, colours.
; Embodiments of the invention are shown in the ~ccompan~ing drawings, in which:
~igure 1 show, in perspective, an uninsulated electrical terminal and the two plates of an identi~ication member embodgqng the invention, ., .
U~insula~ed screw-clampIng terminal slee~e~ are commonly used in electrical installations for making eaI~h or neutral connections to bus bars. ~o enable individual terminals to be reRdi}y identified, identification members are sometimes clipped onto the sleeves (German Patent ~pecification O.S 240208?). However, the integral construction used means that it is not possible to incorporate colour cod~ng for identifying the terminal as an earth connection, using the common green/~ellow coding 1~ for earth co~nections. Also, in the case of some forms of identification member, the position of the identification-carrying side of the member depends on t~e diameter of the conductor ~German Specification O.S 24162~1). Fbrthermore, existing identification members cannot readily be attached to previou~ly installed terminals.
~ he ob~ect of the present in~ention is to proYide an identification member capable ofb~ng attached to an ~ninsulated electrical terminal, which member is simple to ms~ufacture and use and avoids the above-~entioned disadvantages of existing identification ~ëmbers, and in particular can readily be m~ufactured in two colour8 and csn be clipped onto an alread~ installed terminal.
6~
i037140 The present invention resides in ~n idcntification member ror attachment to an uninsulatea electrical terminal comprising a metal ~leeve and a clamping screw located in a wall thereof, which identification member consists of two plates of insulating material provided with means for securing the pl~es together face to face, each of the two mating face~ containing a recess exten~ing thereacross to accommodate the clamping screw, at lea~t one plate having a pair of generally parallel laterall~ spaced legs at opposite sides thereof and retaining detent members on the legs for engaging in the ends of a said sleeve of a terminal to retain the identification member thereon, at least one recess being provided in that side of each plate that faces away from the legs, adapted to receive an identifying plate or tag.
~ Preferably, each said plate is provided with a saia ¦ pair of legs, and in general the two plates will be of ;~l substantially identical shape and dimension~.
~he two plates can readily be made of material of difrerent colours or provided with markings Or different ~, colours.
; Embodiments of the invention are shown in the ~ccompan~ing drawings, in which:
~igure 1 show, in perspective, an uninsulated electrical terminal and the two plates of an identi~ication member embodgqng the invention, ., .
-2--~037140 ~igure 2 shows an identifjcation member of integral con~truction, and Figure 3 shows the detai7 ~ of figure 1, on a larger scale.
- 5 Figure 1 shows an earth bus bar 9 over which is fitted an uninsulated earthing terminal comprisiDg ~
metal sleeve 7 and a clamping screw 8 threaded in the wall 15 of the sleeve, so that by means of this terminal the conductor 10 can be clamped to the bus bar.
~o enable the terminal to be identified, an ident-ification member i5 provided whic~ consist~ of ide~tical plates 1, 1a of insulating plastics ~ater~al. Each plate i8 provided with a flared or headed pin 1~ and a recess 13, 80 that by interengagement of the pins 12 and reces~es 13 ~5 of the plates, the latter can be ~ecured together face to face.
~he ~ting faces of the plates contain respective reces~es 16 to accommodate the clamping screw 8. These recesses together define a bore.
~` 20 hach plate has at opposite sides parallel~aterall~
~paced legs 17 the s~acing ~etween which is substantiall~
eQual to the length Or the sleeve 7 (this being a standard dimension). Each leg has at or adaacent to its free end an inwardly projecting detent hook 2 so that, by virtue of the rlight resilience of the legs, the plates can be clipped over the slee~e 7, the hooks 2 engaging in the open ends 18 Or the sleeve to retain the plates thereon.
~ .. . , . . . ... .... , .. .. . . . . ... . . ... , . _, .. .. . ,, . ~ . ...
lQ37140 The sides 19 of the pl~tes that face away from the legs contai~ undercut recesse~ 11 to recei~s identification plates or tags 20 which may carry numbers, letters or other symbols.
Ea¢h of the recesses 16 contain~ a bead ~ at the end which in use is remote from the tex~inal, and another bead 21 at the end adjacent to the terminal. In addition an intermediate bead 5 divides the bore composed of the -recesses into upper and lower regions 4 and 6 respectively.
~he bead ~ i8 of sufficiently small diameter to pre~ent passage Or the head of the clamping screw. It can also be used as a guide for a screwdriver to operate the clamping ' screw.
;~ The bead 5 i~ also of smaller dia~eter th~n the i 15 ¢lamping screw head but has ~loping surfaces so that, under pressure, the screw head ca~ move passed it. ~he bead 21 has a sloping undersurface and a flat upper surface 80 that Il the scre~r head can mo~e passed t irto the bore but not out of the bore.
As shown i~ figure 3, each of the hoo~s 2 has an upper surface 22 perpendicular to the longitudinal direction o~ the leg 17, an ob~4ue lower face 23, and an oblique side face 24 on that side of the hoo~ which, in use, is cl~sest to the other of the plate~. ~he other side face 25 of the hoo~ is perpendicular to the 6urface of the leg and parallel to the long~tudinal direction of the latter.
The plates 1, 1a c~n be assembled together and clipped ;- onto the sleeYe ? in ~arious different ~ays. For example, . . .
- :~037140 the two plates can be fastened together b~ ~eans of the pins 12 mating with rece~ses 13, and the resulting assembled identiflration member can then be clipped onto the sleeve 7 by moveme~t parallel to the axis o~ the clamping screw so that the hooks 2 clip over the enas of the wall 15 of the sleeve and the bead 21 is forced passed the head of the clamping screw. The oblique faces 23 of the hooks facilitate ' assembly in this way. Alternatively, the plates can be clipped separately onto the sleeve either by movement parallel to the c~mping screw a~is (b~ virtue of the slopiDg faces 23 of the hooks) or by movement perpendicular to the clamping screw axis (by virtue of the sloping side faces 24 of the hooks), and the plates are thereafter fastened together by means of the pins 12 and recesses 13, enclosing the head of the clamping screw between them.
Normally, when the clampi~g screw has been tightened, its head is in the lower region 6 of the bore, as sho~n in Figure 1. ~he plates 1, 1a are held captive by the bead 21. If the screw is unscrewed, its head will engage the bead 5 and lift the plates, until the hooks 2 engage the underside of the wall 15 ofthe sleeve 7. On further unscrewing, the screw head will ride over the bead 5 and ~nter the upper region 4 of the bore. In this condition the screw is held captive by the outermost bead 3, in a position in which the terminal is loose relative to the bus bar 9. When the termi~al is to be fastened in place, light pressure with a screwdriver will push the screw head back into the lower region 6 of the bore. In the clamped state, movement o~ the iden~ification member comprising the la37~40 plates 1, 1a i~ limited by the beads 5 and 21 and the head 26 of the clamping screw, ~o that the position of the ide~tification member i8 substa~tiall~ fixed in relation to the bus bar 9, regardless of the thic~ness of the conductor 10 and the po~itio~ of the sleeve 7.
The positions of the hooks 2 on the leg~ 17 are such as to permlt limited relative movement of the identification member ,and clamping sleeve, 80 that the latter can accommodate - conductors Or different thic~nesses.
~ The plates 1, 18 are preferably made of injection mouldea coloured plastics insulating material, the colour or colours of the plates being selected to pro~ide colour 'fl , ¢oding if desired~ e.g. one plate may be green and the other yellow to indicate an earth termi~al. Alternatively, colouring may be applied to the plates a~ter moulding, ~ e.g. by,hot,foil,printing. I~ either case, the use of two individual plates to form the identification member facilitates the application of colour codi~g.
- Figure 2 shows a modification in which the plates 1, 1a are integrally moulded, being interconnected by a thi~
, hinge portion 14.
Numerous modifications of the embodiment described are pos~ible. ~or example, it is onl~ necessary to pro~ide one pair of legs, i.e. one plate could be manufactured without leg~. Also, an~ of the beads 3, 5, 21 could be omitted from one of the plates, or other form~ of constriction for e~gaging the clampin~ screw head can be provided.
, .
~>'
- 5 Figure 1 shows an earth bus bar 9 over which is fitted an uninsulated earthing terminal comprisiDg ~
metal sleeve 7 and a clamping screw 8 threaded in the wall 15 of the sleeve, so that by means of this terminal the conductor 10 can be clamped to the bus bar.
~o enable the terminal to be identified, an ident-ification member i5 provided whic~ consist~ of ide~tical plates 1, 1a of insulating plastics ~ater~al. Each plate i8 provided with a flared or headed pin 1~ and a recess 13, 80 that by interengagement of the pins 12 and reces~es 13 ~5 of the plates, the latter can be ~ecured together face to face.
~he ~ting faces of the plates contain respective reces~es 16 to accommodate the clamping screw 8. These recesses together define a bore.
~` 20 hach plate has at opposite sides parallel~aterall~
~paced legs 17 the s~acing ~etween which is substantiall~
eQual to the length Or the sleeve 7 (this being a standard dimension). Each leg has at or adaacent to its free end an inwardly projecting detent hook 2 so that, by virtue of the rlight resilience of the legs, the plates can be clipped over the slee~e 7, the hooks 2 engaging in the open ends 18 Or the sleeve to retain the plates thereon.
~ .. . , . . . ... .... , .. .. . . . . ... . . ... , . _, .. .. . ,, . ~ . ...
lQ37140 The sides 19 of the pl~tes that face away from the legs contai~ undercut recesse~ 11 to recei~s identification plates or tags 20 which may carry numbers, letters or other symbols.
Ea¢h of the recesses 16 contain~ a bead ~ at the end which in use is remote from the tex~inal, and another bead 21 at the end adjacent to the terminal. In addition an intermediate bead 5 divides the bore composed of the -recesses into upper and lower regions 4 and 6 respectively.
~he bead ~ i8 of sufficiently small diameter to pre~ent passage Or the head of the clamping screw. It can also be used as a guide for a screwdriver to operate the clamping ' screw.
;~ The bead 5 i~ also of smaller dia~eter th~n the i 15 ¢lamping screw head but has ~loping surfaces so that, under pressure, the screw head ca~ move passed it. ~he bead 21 has a sloping undersurface and a flat upper surface 80 that Il the scre~r head can mo~e passed t irto the bore but not out of the bore.
As shown i~ figure 3, each of the hoo~s 2 has an upper surface 22 perpendicular to the longitudinal direction o~ the leg 17, an ob~4ue lower face 23, and an oblique side face 24 on that side of the hoo~ which, in use, is cl~sest to the other of the plate~. ~he other side face 25 of the hoo~ is perpendicular to the 6urface of the leg and parallel to the long~tudinal direction of the latter.
The plates 1, 1a c~n be assembled together and clipped ;- onto the sleeYe ? in ~arious different ~ays. For example, . . .
- :~037140 the two plates can be fastened together b~ ~eans of the pins 12 mating with rece~ses 13, and the resulting assembled identiflration member can then be clipped onto the sleeve 7 by moveme~t parallel to the axis o~ the clamping screw so that the hooks 2 clip over the enas of the wall 15 of the sleeve and the bead 21 is forced passed the head of the clamping screw. The oblique faces 23 of the hooks facilitate ' assembly in this way. Alternatively, the plates can be clipped separately onto the sleeve either by movement parallel to the c~mping screw a~is (b~ virtue of the slopiDg faces 23 of the hooks) or by movement perpendicular to the clamping screw axis (by virtue of the sloping side faces 24 of the hooks), and the plates are thereafter fastened together by means of the pins 12 and recesses 13, enclosing the head of the clamping screw between them.
Normally, when the clampi~g screw has been tightened, its head is in the lower region 6 of the bore, as sho~n in Figure 1. ~he plates 1, 1a are held captive by the bead 21. If the screw is unscrewed, its head will engage the bead 5 and lift the plates, until the hooks 2 engage the underside of the wall 15 ofthe sleeve 7. On further unscrewing, the screw head will ride over the bead 5 and ~nter the upper region 4 of the bore. In this condition the screw is held captive by the outermost bead 3, in a position in which the terminal is loose relative to the bus bar 9. When the termi~al is to be fastened in place, light pressure with a screwdriver will push the screw head back into the lower region 6 of the bore. In the clamped state, movement o~ the iden~ification member comprising the la37~40 plates 1, 1a i~ limited by the beads 5 and 21 and the head 26 of the clamping screw, ~o that the position of the ide~tification member i8 substa~tiall~ fixed in relation to the bus bar 9, regardless of the thic~ness of the conductor 10 and the po~itio~ of the sleeve 7.
The positions of the hooks 2 on the leg~ 17 are such as to permlt limited relative movement of the identification member ,and clamping sleeve, 80 that the latter can accommodate - conductors Or different thic~nesses.
~ The plates 1, 18 are preferably made of injection mouldea coloured plastics insulating material, the colour or colours of the plates being selected to pro~ide colour 'fl , ¢oding if desired~ e.g. one plate may be green and the other yellow to indicate an earth termi~al. Alternatively, colouring may be applied to the plates a~ter moulding, ~ e.g. by,hot,foil,printing. I~ either case, the use of two individual plates to form the identification member facilitates the application of colour codi~g.
- Figure 2 shows a modification in which the plates 1, 1a are integrally moulded, being interconnected by a thi~
, hinge portion 14.
Numerous modifications of the embodiment described are pos~ible. ~or example, it is onl~ necessary to pro~ide one pair of legs, i.e. one plate could be manufactured without leg~. Also, an~ of the beads 3, 5, 21 could be omitted from one of the plates, or other form~ of constriction for e~gaging the clampin~ screw head can be provided.
, .
~>'
Claims (11)
1. An identification member for attachment to an uninsulated electrical terminal comprising a metal sleeve and a clamping screw located in a wall thereof which identification member consists of two plates of insulating material provided with means for securing the plates together face to face, each of the two mating faces containing a recess extending thereacross to accommodate the clamping screw, at least one plate having a pair of generally parallel laterally spaced legs at opposite sides thereof and retaining detent members on the legs for engaging in the ends of a said sleeve of a terminal to retain the identification member thereon, at least one recess being provided in that side of each plate that faces away from the legs,adapted to receive an identifying plate or tag.
2. An identification member as claimed in claim 1 in which both plates are provided with said legs.
3. An identification member as claimed in claim 1 in which the securing means comprise at least one projection on one plate and at least one mating recess on the other plate.
4. An identification member as claimed in claim 3 having at least one said recess and at least one said projection on each plate.
5. An identification member as claimed in claim 1 in which at least one of the recesses for receiving the screw has at its outer end a constriction for keeping the screw captive.
6. An identification member as claimed in claim 1 in which at least one of the recesses for receiving the screw has a constriction at an intermediate position between its ends.
7. An identification member as claimed in claim 1 in which each detent member has at least one oblique face to permit clipping onto a said sleeve, and a retaining face facing towards the associated plate and substantially perpendicular to the longitudinal direction of the associated leg.
8. An identification member as claimed in claim 1 in which the two plates are hinged together.
9. An identification member as claimed in claim 8 in which the plates are made of plastics material and the hinge is integral with the plates.
10. An identification member as claimed in claim 1 in which the two plates are of different colours.
11. An identification member as claimed in claim 1 in which the two plates are of substantially identical shape and dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,840A CA1037140A (en) | 1976-04-22 | 1976-04-22 | Identification member for electrical terminals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,840A CA1037140A (en) | 1976-04-22 | 1976-04-22 | Identification member for electrical terminals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1037140A true CA1037140A (en) | 1978-08-22 |
Family
ID=4105762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA250,840A Expired CA1037140A (en) | 1976-04-22 | 1976-04-22 | Identification member for electrical terminals |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1037140A (en) |
-
1976
- 1976-04-22 CA CA250,840A patent/CA1037140A/en not_active Expired
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