USRE19716E

USRE19716E - Connecter

Info

Publication number: USRE19716E
Authority: US
Publication date: 1935-10-01

Description

Oct. 1, 1935. T. BIRKENMAIER CONNECTER Original Filed June 22. 1951, 5 Sheets-Sheet 1 Oct. 1, 1935. T BIRKENMAIER Re. 19,716

CONNECTER Original Filed June 22, 1931 5 Sheets-Sheet 2 Oct. l, 1935. T. BIRKENMAIER CONNECTER Original Filed June 22, 1931 3 Sheets-Sheet 3 1 FIG. I4.

@man

Ressued Oct. el, 1935 CNNECTEE Theodore Birkenmaier, St. Louis, Mo., assignor to W. N. Matthews Oorporation, St. Louis, Mo., a corporation of Missouri Original No. 1,849,999,

Serial No. 545,878, Jllne 22,-1931.

ama Maren 15. 1932. Application for reissue March 29, 1935. Serial No. 13.768

Claims. (Cl. 287-75) This invention relates to connecters, and with regard to certain more speciilc features, to single unit, service connecters f r connecting line wires and the like to service and the like.

5. Among the several objects oi the invention may .be noted the provision of connecters formed in one unit and which are screw and clamp actuated; the provision of a connecter of the class described which may be readily connected to the lo -mid-portion o! a length of wire without cutting or otherwise separating the wire, and which may be so connected with one hand oran operator:

f the provision of a connecter of the class described which is adapted to connect two wires together l5 Aby rotation oi' a nut of said connecter in either a clockwise or counterclockwise rotation; the provision or a one unit connecter of the class described in which there is no deformation of metal required as the connecter is applied to the wires `2o and which is adapted to connect wires of diil'erent sizes; the provision of a connecter of the class described which effects a more rapid connection between wires than has been heretofore possible with one unit connecters; and, the provision of connecters of the class described which are simple and economical to manufacture and which are strong. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which .will be exemplified in the structure hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated several oi various possible embodiments of the invention.

Fig. 1 is a front elevation of one form of the invention shown placed over a service connection and line wire but prior to tightening;

Fig. 2 is a vertical section taken on line 2--2 of Fig. l;

Fig. 3 is a side elevation o! the connecter as it is being applied to the line wire;

` Fig. 4 is a view similar to Fig. 3, but showing the connecter hanging on the wire after the hand is removed, the dotted line alternate position showing how one element may be positioned by a slight touch;

f Fig. 5 is a side elevation showing one position of the connecter clamping the wires;

Fig. 6 is a view similar to Fig. 5 but showing the wires clamped by an alternative position oi the connector;y

Fig. 7 is a side elevation of an alternative form of the connecter showing it clamping and connecting two wires;

Fig. 8 is a vertical section of a double threaded nut of the connecter of Fig. 7;

Fig. 9 is a side elevation showing the connecter 5 ot Fig. 7 opened and being applied to a line wire;

Fig. 10 is a top plan view of the connecter of Fig. 7:

Fig. l1 is a side elevation of another modication oi' a one-piece connecter shown clamping 10 two wires together;

Fig. 12 is a vertical section of the connecter of Fig. 11 opened and being applied to a line wire:

Fig. 13 is a front elevation of a preferred form of the invention shown placed over a line wire 15 and clamping a service wire of a smaller diameter thereto;

"Fig, 14 is a side elevation of the connecter of Fig. 13 showing it being applied to the line Fig. l5 is a view similar to Pig. 14 but showing the connecter in partially clamped position, and a service wire in place with the line wire but prior to the final clamping: and,

Fig. is 1s a vertical section taken on une ls-ls 25 of Fig. 13.

Similar reference characters indicate corne-V sponding parts throughout the several views of the drawings. J y Referring now'more particularly to Fig. l, there 30 is shown at numeral I a connecter positioned over aservicewire orconnection iandalinewire 3. In customary practice. the line wire I is stretched between poles or laid in permanent installation in underground conduits and the like and consequently such a wire has no ends which may be passed through aconnecter block. Further, inasmuch as connections are generally made to such line wires as indicated at numeral I. after the wires have been strung overhead vor laid under 40 ground, and because of the mechanical diiiiculties of splicing, and because it is inadvisable tocut the line wire I, the connecter I must necessarily be adapted to join the service connection 5 to the line wire 3 without requiring an end oi the line wire to be passed through a block, or without cutting or splicing the wires.

The present invention provides a one-piece or unit connecter for making a service connection with a line wire 3, which requires neither an end 50 of the line wire nor any cutting of the wire to complete the connection and which may be rapidly applied with one hand.

The Fig. l embodiment of the present invention comprises two clamping laws or shanks l and 9 55 permanently joined together by a band or collar I I. The collar I passes around a circular groove, depressed or cut-out portion I3 ot the shank 1 and around asimilar but much longer cut away portion I5 of the shank 9. The shank 1 has a second machined or cut-out and unthreaded portion |1 and the shank 9 has a threaded portion I9 opposite the groove I1. A nut 2| is permanently but freely mounted on the shank 1 and held in place by the groove I1. The threaded portion I9 of the shank 9 is adapted to thread into the nut 2|. Thus both the nut and the shank 9 are permanently joined to the shank 1. The

shanks

1 and 9 are substantially hemi-cylindrical and have faces 3 and I|I which are adapted to slidably engage one another. Together, the

shanks

1 and 9 form a substantially complete cylinder, although positive, complete cylindrical (or circular cross-section) conformation is not essential to proper operation. Accordingly, the words complete cylindrical (or "complete circular cross-section) are herein dened as conformations more complete than hemicylindrical (or semi-circular conformations) As the threaded portion I9 is threaded into and out of the nut 2|, by rotating the nut relative to the two shanks, the portion I5 of the shank 9 slides freely through the collar II and consequently moves longitudinally with respect to the shank 1.

Both of the

shanks

1 and 9 are provided with

notches

23 and 25 respectively, the notches respectively having

end walls

21 and 29, and 3| and 33. The

notches

23 and 25 form the receiving portions of the

shanks

1 and 9, and the end walls the clamping portions. Thus when the notches are juxtapositioned as shown in Fig. 2, the two

wires

3 and 5 may befreely positioned between the notches but as shown in Figs. 5 and 6 when the

wires

3 and 5 are positioned in the notches, and the latter are moved out of juxtaposition as by axially moving the

shanks

1 and 9 relative to each other, the wires are clamped by the side walls.

It is to be noted that the shank 3 and its groove or notch 25 are both longer than the shank 1 and its notch. Thus the notch 25 is formed sufliciently long so that as the threaded portion I9 leaves the top of nut 2|, the edge 3| of the groove 25 is aligned with the top edge of the shank. Thus as the shank 9 is raised still farther above the nut 2| the collar I is positioned around the cut away portion I5 and the groove 25 and the shank 9 is allowed movement other than axial movement with respect to the shank 1. Hence the shank 9 may be positioned angularly with respect to the shank 1 (Fig. 3), thereby leaving ample space between the nut 2| and notch 23 to receive a wire 3. Further, by holding the shank l at its top portion and tipping it, as shown in Fig. 3, the shank 9 automatically assumes a position at an angle to the axis of the shank 1, this being by reason of the low center of gravity of the connecter as a unit. caused by the relatively heavy nut 2| attached to the bottom end of the shank 1.

The application of the connecter I to join a service wire 5 to the line wire 3 is as follows:

The operator holds the connecter I at the top of the shank 9, as indicated at numeral 33, and after the threaded pe :tion I9 of the shank 9 has been Unthreaded from the nut 2|, tilts the shank 9 thereby providing ample room to hook the connecter I over thewire 3, the wire 3 being positioned in the notch 23 of the shank 1 as hereinbefore described. The operator then drops the shank 9, and by reason of the low center of gravity of the connecter, a. slight pushing of the top of the shank 9 in a counter-clockwise direction swings the threaded portion I9 against the shank 1, to a position to effect threading into the nut 2|. In this position even though the operators hand is entirely removed from the connecter and even though the wire 3 may be vibrating to some extent or moving as under the action of a high wind or the like, the connecter I will not drop off the wire 3, because as the connecter is hanging on the wire 3, as shown by the dotted line position in Fig. 4, the weight of the nut 2| keeps the connecter I from rotating about the Wire to a position in which it could fall oi the wire by reason of the wire passing out between the nut 2| and the bottom of the shank 9.

With the same hand, the operator now rotates the nut 2| in such a way as to thread the threaded portion I9 into the nut and continues to do so until the

edges

29 and 33 of the

notches

23 and 25 are substantially juxtapositioned. During this operation there are no critical periods when an inadvertent push may displace the connecter from the wire, as was the case with prior devices which required two-hand manipulation to ensure proper operation. After this operation has been completed, it is positively impossible to remove the connecter I from the wire 3 without unscrewing the nut 2| from the threaded portion I9, and consequently, the operater does not have to take any precautions whatsoever to prevent the connecter from falling from the wire. The end of the service wire 5 is now slid into position adjacent the wire 3 in the lower part of the hole or passage formed by the now juxtaposed

notches

23 and 25 and inasmuch as the

edges

29 and 33, and 21 and 3| are substantially juxtapositioned the

Wires

3 and 5 are freely movable in the passage bounded by the

notches

23 and 25. Then the operator by means of a wrench or the like applied to wrench receiving portion 22 of nut 2| tightens the nut 2| so as to further force the portion I9 of the shank 9 into the nut. In this Way the edge 3| of the nut 25 is gradually brought below the edge 21, and likewise the edge 29 of the notch 23 is gradually positioned above the end 33 of the groove 25. In other words, the edges 3| and 29 approach each other to positively clamp the two

wires

3 and 5 together. In this Way a good electrical, as well as a. strong mechanical connection is made between the two

wires

3 and 5, without cutting or splicing the wire 3.

If, however, after the nut 2| is once on the threads I9, the operator either inadvertently or intentionally rotates the nut 2| in a counterclockwise manner, the connecter I eiects a clamping action as shown in Fig. 6. The counterclockwise rotation of the connecter 2| pushes the edge 33 of the shank 9 toward the edge 21 of the shank 1 and these two edges being pushed towards each other under the action of the threads effect the clamping of the

wires

3 and 5 as is clearly shown in Fig. 6.

In order to remove the connecter I from the

wires

3 and 5 and accordingly to disconnect the wire 5 from the line wire 3, it is only necessary to substantially align the

respective edges

21, 29, 3| and 33 as shown in Fig. 2, pull the wire 5 from the connecter I and thread the portion I9 completely out of the nut 2| by the proper rotation of the nut 2| and then to completely remove the connecter from the wire 3, which removal is easily effected by reversing the procedure as described in the application of the connecter to the wire 3.

An advantage of this connecter is that it is not only formed in one piece or unit but also is readily applied with one hand by the operator. Further, as the connecter is applied, as shown in Figs. 3 and 4, there is very little likelihood of the connecter falling from the line wire 3 as was formerly possible with the usual two-piece type of connecter. Anothery advantage of the invention is that the threaded portion Il may be made suiliciently large to provide the amount of pressure necessary to eifectja relatively substantial locking ofthe wires 3 and i by means of the

shanks

9 and 1.

To facilitate manufacture, the ring is placed over the depressions and then the outer ends flanged over. The nut 3i is also placed inthe unthreaded groove I1 and the end of the groove is then flanged.

Referring now to the modification of the invention shown in Figs. 'i through 9, at numeral 3l there is illustrated a connecter clamping together the two

wires

3 and 5 which are similar to those shown in Fig. 1.

The connecter comprises two

Shanks

31 and 39, each shank having a threaded portion 4I and I3 and flat surfaces 45 and I1 respectively. The shank 31 has permanently and rigidly fastened thereto a band or ring 49 as shown in Figs. 7 and 9. Just below the band 49 a notch is cut out of' the shank 31. said notch being long enough to freely receive the two adjacent wires 3 and] as shown in Fig. '1. The threaded portion li of the shank 31 has right hand threads.

The shank 39 has a cut away portion 53 which faces the notch 5| of the shank 31, and which extends to the upper end of the shank 39. The curved surface of the shank 33 opposite the cut away portion 53 is also out away as shown at numeral and is adapted to slip or freely move past the ring I9 as the shank 39 movesaxially relative to the shank 31, the two surfaces 4I and l1 slid ably engaging and moving past each other. The threads I3 of the shank 39 are left hand threads. The two

shanks

31 and 39 are permanently joined together by means of the nut l1. 'nie nut 61 is provided with both right hand threads 33 and left hand threads 4|! as shown in Fig. 8, the right hand threads 33 finding the threads and the left hand threads 49 finding the threads 43. The two members or

shanks

31 and 33 are threaded together by positioning the threaded portion 4I in the top of the nut, and the threaded portion I3 in the bottom of' the nut, and then rotating the nut in a clockwise direction to cause the portion 4i to thread down into the nut and the portion 43 to thread up into the nut.- It is seen that by this operation `the two

shanks

31 and 39 are moved longitudinally relative to each other, the faces I5 and 41 sliding on each other.

After the

portions

31 and 39 have been threaded into the nut 51. as shown in Fig. 9. the ends of the threads Il at the lower end of the jaws 31v are swedged or otherwise deformed to prevent removal of the nut at that end (see numeral 2) It is impossible to remove the nut 51 from the top portion of the shank 31 which carries the collar 49 inasmuch as it has a larger diameter than the threaded portion itself. Itis to be noted that the length of the threaded portion 43 is at leest equal in length to the threaded portion 9|-, and when the nut Slis at the extreme end of the threads ll, the threads 43 are well within the nut 51.

The cut away portions 6I and 93 have edges Il fand $3 respectively, and as the shank 39 moves l tioning between the two

shanks

31 and 39 gives l0 ample room for the insertion of the line wire 3 between the two cut away portions Si and 53. The operater now pushes the connecter upward to seat the wire 3 between the cut away portions 5i and 53 and then rotates the nut 51 in a clock- 15 wise direction or in the proper direction to move the two

shanks

31 and 39 relative to each other to cause shank 39 to just pass into the collar I9, and at the same time to substantially align the edges or ends 9i and 63. At this stage the wire 3 20 is completely but freely locked in the connecter Vby the passage surrounded by the cut away portions il and 53, the collar 49 and the two edges Gi and 93. At this stage of the operation, the end 5 of the service wire is passed through the opening 25 and the nut 51 is then rotated to force the edge 33 of the shank 39 toward the collar I9, thereby clamping the two

wires

3 and 5 together between the edge 93 and the collar 49.

An advantage of this form of. the invention is 30 i the differential action obtained between the left and right hand threads. It is to be understood that this form of the invention may be changed to employ, for instance, two right hand threads of different pitches whereby a relatively large me- 3E chanical advantage may be obtained by the relative motion of the

Shanks

31 and 39. In the present form, as shown in Figs. 7 through 9, the rapidity with which the two

shanks

31 and 39 move with respect `to each other underlthe action oi' 40 the right and left handthreads is especially adr vantageous to complete the connection in a shorter period of time.

Referring now to the modification of Figs. i1

and 12,V which is a prototype of the form of Figs. 45 y 'I to 9,.there is illustrated at numeral 93 a connector connecting the two

wires

3 and 5 which is similar to those illustrated in the prior modiilcations. 'Ihe connecter B5 comprises two Shanks 81 and B9. the former shank comprising a head 50 1|, which has a cutout portion 13 having a top vedge 13; and a threaded portion 11 which has preferably right hand threads.

The shank I9 Ahas a cutout portion 33 similar` to that of the cutout portion 19, but which does 55 not have the end portion 15 at the upper end thereof. The cutout portion 33 however, has a lower edge 3l. A semi-circular, unthreaded groove B5 is formed in the shank 69 and is adapted to form the guiding seat for a nut 89.

The two

shanks

61 and 69 have faced portions 13 and li which when the nut 39 is threaded on to the threads 11, are juxtapositioned and slide past each other as the nut is threaded up and down the threads 11, the shank 69 being carried 65 by means of the nut seated in the groove 85. After the nut 89 has been threaded on to the jaw 61, the ends of the threads 11 are swedged or otherwise deformed to prevent the removal of th nut I9 from the shank 61. 10

The connecter is applied to connect the 'two

wires

3 and 5 by first positioning the

shanks

61 and 69, by rotating the nut 99. to drop the top of the shank 69 below the edge 15 of the cutout portion 13 to allow ample room for the introduc- 76 tion of the wire 3. Then, as described in connection with the modification of Fig. 7, the connecter is pushed upwardly in such a manner as to seat the wire 3 between the cut away

portions

13 and 83, and then the nut 89 is turned to axially push the shank B9 along the shank 61 to push the edge 84 of the cut away portion 83 toward the edge 15. The wire 3 being seated between the cut away portions prevents rotation of the connecter 65 relative to the wire 3 as the nut 99 is turned. After the edge 94 rises to substantial juxtaposition with respect to a corresponding edge 96 of4 the shank 61, the wire 3 is completely enclosed between the cutout portions 13 and B3 and consequently caught therein. The service wire 5 is now inserted between the cut away portions and the nut 89 is rotated to force the end B4 toward the edge 15 and accordingly to clamp the two

wires

3 and 5 between the

edges

84 and 15.

It is to be understood, in connection with the modifications of Figs. '1 and l1, that after the connectors 35 and G5 respectively have assumed the position as shown in Figs. 9 to 12, the other hand of the operator may be used to prevent rotation of the

shanks

31 and 61 respectively, while the nuts 51 and 89 are being applied. Further, in these modifications both wires may be inserted at the beginning of the operation if so desired.

Referring now to the modification of Figs. 13 through 16. there is shown a preferred form of the invention, namely, a connecter which is adapted to connect substantially all sizes of line and service wires together and consequently is adapted to connect a relatively small service wire to a relatively large line wire as well as to connect wires of the same size.

The connecter as illustrated at numeral 9| is shown positively clamping a service wire 93 to a line wire 3, which wire 3 is similar to the line wires heretofore described. The service wire 93 has a substantially smaller diameter than the line wire 3.

The connecter 9| comprises a shank 95 and a clamping member 91, the former comprising a bolt shaped member having a hexagonal head |I, an exterior threaded portion 99, preferably extending over half way around the bolt shaped member, and a faced portion 9B opposite said threaded portion. The hexagonal head |0| is full size and has a notch or clamping portion |03 on the under side thereof, one edge of which is flush with the faced portion 98. The notch |03 has an outer edge |04.

The member 91 is substantially thinner than the shank 95 and is also substantially shorter. It has a faced portion I I, a groove oppositely disposed to the faced portion and a notch or clamping portion |01 at the top thereof. 'Ihe outer edge |09 of the notch |01 is adapted to just slide past the outer edge |04 of the notch |03 when the faces 98 vand III are juxtaposed (Figs. l5 and 16) The

members

95 and 91 are held in position, in the faces 90 and III slidably engaging each other, by a nut ||5 which is seated in the groove |05 of the member 91 and which threads on to the threads 99 of the shank 95. After the two

members

95 and 91 have been thus assembled by the nut ||5, the end of the threaded portion 99 of the shank 95 is deformed as shown at numeral 2 in order to positively prevent the removal of the nut ||5 from the shank 95. It is thus seen that the two

members

95 and 91 are joined together as a unit.

The faced portions 98 and I I are substantially continuous throughout the length of the

respective members

95 and 91, the notches |03 and |01 being formed respectively on the under side of the head |0| and the top portion of the member 91, in contradistinction to the positioning of the notches hereinbefore described in the modifica- 5 tions shown in Figs. 1 through 12. It is thus seen that at no time during the application of the connecter 9| to wires is it possible for a wire to slip down between a faced portion and a notched portion, which slipping thereinbetween would pro- 10 vide a relatively poor connection between the two wires. The inside surface of the notch |03 faces the inside surface of the notch |01 at all times and is at no time moved out of juxtaposition thereto. Consequently clamping by the two

members

95 and 91 consists in moving the inner surfaces of the two notches |03 and |04 toward each other.

The connecter 9| may be applied to clamp a line wire to a service wire in the following manner:

The connecter is opened, as shown in Fig. 14, by threading the nut ||5 down on the shank 95 to allow suicient room between the two end portions |09 and |09 for the passage of a line wire 3 25 therebetween. The nut I|5 is then grasped by the hand of the operator, and the notch |03 hooked over the line wire 3, by passing the line wire between the edges |04 and |09. 'I'he operator then with the same hand threads the nut I I5 up 30 on the shank 95, relative rotation oi. the shank 95 to the wire 3 being prevented by the notched portion |03, until the two edges |04 and |09 are substantially ush with each other as shown in Fig. 15. In this position of the

members

95 and 35 91, the wire is completely surrounded by the notches |03 and |01 of the

members

95 and 91 and consequently the removal of the wire 3 from the members is positively prevented.

It is to be noted that at all times during the positioning of the

members

95 and 91 around the wire 3, even though at times the hand of the operator may be entirely removed from the nut I5, there is no danger of the connecter 9| dropping oi the wire 3 due to vibrations or other dis- 45 turbances of the wire 3, inasmuch as the notch |03 provides a. substantial recess for the wire 3. The low center of gravity of the connecter effected by the positioning of the relatively heavy nut ||5 below the notch |03, prevents any rotation of the connecter 9| which would allow the connecter to drop from the wire.

The service wire 93 is now positioned below the wire 3, as shown in Figs. 13 through 16, by slipping the end of the wire 93 through the pas- 55 sage provided by the notches |03 and |01, and then threading the nut |I5 farther on to the shank 95, thereby forcing the member 91 toward the head I0| of the shank 95 and thus forcing the two clamping portions toward each other to securely lock the two

wires

3 and 93 together.

An advantage of this modification is that regardless of the sizes of the two wires connected, positive connection between the two is always insured.

A further advantage of this modification is that the increased threaded portion 99 of the shank 95 and the stocky construction of the member 91 substantially increase the available pressure which may be exerted between the notches |03 and |01 by forcing the member 91 against the head |0| of the shank 95. Further the provision of the full hexagonal head |0| provides an additional hold for a wrench whereby two wrenches, one applied to the nut and one applied to the head, may be employed to clamp the two wires together.

A further advantage of this modification is that the member 91 may be made by process of drop forging with the consequent substantial overall reduction in the cost in the manufacture of the connecter.

A general advantage of the invention is that the one-piece connecters thus provided to connect a service wire to a line wire are readily applied with one hand. Furthermore, no tool is required to deform the connecters as they are applied over the wires.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. A connecter comprising a substantially hemicylindrical shank threaded at one end thereof, said shank having a notch in its plane surface intermediate its ends, a second substantially hemicylindrical shank associated with said rst shank and forming therewith a substantially complete cylinder, said second shank also having a notch in its plane surface intermediate its ends, said second notch normally facing said first notch, a nut encircling one end of said shank, and means on said second shank for retaining said nut thereon, said nut being adapted to receive and engage the threaded end of said iirst shank, whereby, upon rotation of said nut, relative longitudinal motion is effected between said shanks, said notches being thereby displaced from facing position to clamp together a plurality of wires inserted therein.

2. A connecter comprising a substantially hernicylindrical shank threaded at one end thereof in one direction, said shank having a notch in its plane surface intermediate its ends, a second substantially hemicylindrical shank associated with said first shank and forming therewith a substantially complete cylinder, said second shank being threaded at one end thereof but in a reverse direction, said second shank having a notch in its plane surface normally facing said rst notch, a nut threaded in two directions and engaging and holding in assembly the threaded ends of both said shanks, whereby, upon rotation of said nut, relative longitudinal motion is effected between said shanks, said notches being thereby displaced from facing position to clamp together a plurality of wires inserted therein.

3. A connector comprising a clamping portion and a threaded shank, said shank having a cross section less than a complete circle, a clamping member associated with said shank and having a cross section such that said shank and said member together have a substantially complete circular cross section, a nut engaging the threads on said shank and encircling said member, thereby holding said member to said shank, whereby, upon rotation of said nut, relative longitudinal motion is eiected between said member and said shank, said member having a clamping portion facing said first-named clamping portion, said portions being shaped to receive and at least partially surround a plurality of wires, so that when said clamping portions are brought together by manipulation oi said( nut, said wires are clamped together, and an unthreaded portion on said shank permitting disengagement of said nut from the threads of said shank to receive said wires.

4. A connecter comprising a clamping portion and a threaded shank, said shank having across section less than a complete circle, a clamping member associated with said shank and having a cross section such that said shank and said member together have a substantially complete circular cross section, a nut engaging the threads on said shank and encircling said member, thereby holding said member to said shank, whereby, upon rotation of said nut, relative longitudinal motion is effected between said member and said shank, said member having a clamping portion facing said first-named clamping portion, said portion being shaped to receive and atleast partially surround a plurality of wires, so that when said clamping portions are brought together by manipulation of said nut, said Wires are clamped together, an Unthreaded portion on said shank permitting disengagement of said nut from the threads of said shank to receive said wires, and means associated with said unthreaded portion for preventing separation of the shank and the remainder of ythe connecter, including the nut,

when said nut is free of the threads.

5. A connecter comprising a clamping portion and a threaded shank having a cross section less than a complete circle, a clamping member associated with said shank and having a cross section such that the shank and said member together have a substantially complete circular cross section, a nut engaging the threads on said shank and encircling said shank, whereby, u'ponrotation of said nut relative longitudinal motion is r surround a plurality of wires, so that when said clamping portions are brought together by ma' nipulation of the nut said wires are clamped together, and an unthreaded portion associated with said shank on which the remainder of the connecter is loosely and tiltably but non-remov- 00 ably held prisoner to said threaded shank.

THEODORE BIRKENMAIER.