US2295051A

US2295051A - Connector

Info

Publication number: US2295051A
Application number: US419539A
Authority: US
Inventors: Raymond T Roth
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-11-18
Filing date: 1941-11-18
Publication date: 1942-09-08
Anticipated expiration: 1959-09-08

Description

R. T. ROTH Sept. 8, 1942.

CONNECTOR Filed Nov. 18, 1941 4 Sheets-Sheet 1 IN VENTOR Raymond Z'Rot/z BIY N Am M MYTQISORNEY R. 1'. R-OTH I 2,295,051

Sept. 8, 1942.

' I comwcwon Filed Nov. 18, 1941 4 Sheets-Sheet 2 INVENTOR [Fay/2102111 7. Both N; ATTORNEY Sept. 8, 1942. R. T. RQTH 2,295,051 4 CONNECTOR.

Filed Nov. 18, 1941 4 Sheets-Sheet 3 INYENTOR Bay/wand 7T Bot/2 I BY 2 m ATTORNEY Sept. 8, 1942. R, ROTH 2,295,051

CONNECTOR Filed Nov. 18, 1941 4 Sheets-Sheet 4 WZ INVENTOR ATTORNEY Patented Sept. 8, 1942 i 1 was UNITED STATES PATENT" orgies] amt Raymond L Roth, Philadelphia, Pa. Application November 18, 1941, Serial No. 419,539

, 20 Claims. (01. 24-81) This invention relates to connectors and particularly to electrical connector forming what is known as a parallel cable tap, or other conductor or pipe connections.

In accordance with the invention in its broader aspects my improved connector comprises a bar or plate formed with reverse bends which are severally adapted to embrace cables, pipes or similar objects, together with a bolt extending through the bar or plate between bends and adapted to force the metal of the bar or plate into close clamping engagement with the cable at or adjacent to the bend. Among the objects of my invention are simplicity and economy 01- construction, strength and durability, as wellas ease of attachment o! the connecting device to the cables.

Also in certain forms of my invention the several parts of my connecting device are permanently attached to one another so that, in transportation of the connector or in applying it to the cables, there is no likelihood that any part will be lost, dropped or otherwise become separated from the rest.

Other objects of my invention will appear from the following description taken in connection with the accompanying drawings, wherein:

Figure 1 shows a side elevation of one form 0! the connector in partly unclamped and in clamped positions;

Figure 2 is a view similar to Figure 1, but showing the clamping bolt swung into a position to permit insertion of the cables into the clamping device; I I

Figure 3 is a top plan view, showing a plate or bar from which the clamping'bar shown in Figures 1 and 2 is made;

modified iorm oi! washer formed withaiclamping surface adaptedto engage 'tbc'conductor;

Figure 11 is a perspective view of the washer shown'in Figure 10;

Figure 12 is a view similar to Figure '1 but showing a still further modified form 01' clamping bolt and also showing the adaptability of the connector for receiving cables or varying diameters;

Figure 13 is a sectional view, taken on the line i3-l3 of Fig re 12;

Figure '14 is a diagrammatic view,.showing a connecting bar iormed with curved bends of difierent radii and showing the adaptability of the connector for receiving cables of diflerent diameters;

Figure 15 is a view'similar to Figure 14, but showing, the bolt head of Figure 12 and the clamping washer of Figure 11;

Figure 16 is a view showing a modification, wherein the connector is adapted to join together more than two cables.-

Figure is a diagrammatic view,.showing one end otthe clamping bolt, this end being termed with a portion adapted to be broken of! after the connector is applied to the cables;

Figure 18 is a view similar-{to Figure 4, but showing a blank for forming a clamping bar adapted to receive two clamping bolts.

Figure 4 is a view similar to Figure 3, but

showing a blank from which a modified connector clamping bar may be formed.

Figures 5 and 6 are perspective views'oi one end of a clamping bar, showing a modification of the bar and, in the case of Figure 6, a modified form of clamping bolt;

Figure 7 is a view similar to Figure 1, but showing a bolt holding washer 9 applied to the clamping bar:

.Figure 8 is a top plan view of a blank from which clamping bar shown in Figure 'I may be formed;

Figure 9 is a perspective view of the washer shown in Figure 7;

Figure 10 is a side elevation showingone end Figure 19 is a side elevation of a clamping bar with a band adapted to receive cables of difierent sizes and adapted to be clamped by means oi the clamping bolt shown in--Figure 12.

Figure 20 is a perspective view similar to Figure 11, but showing a washer formed with clamping faces adapted alternately to engage cables of different sizes.

Figure 21 is a view similar to Figure 19, but

showing the clamping washer of Figure 20 upplied to an end of the clamping bar.

Figure 22 is atop elevation of the structure shown in Figure 21. i Y Figure 23 is a sectional view, taken on the line 23-23 of Figure 22.

Figure 24 is a side elevation of the clamping bar with two bends, at the upper end of which is the clamping washer of Figure 20, and at the lower end of which is a clampingwasher of modifiedconstruction, formed with pins adapted to of the clamping bar and bolt'together with a be received in openings in the lower end of the clamping bar.

Figure 25 is a perspective view of the washer shown in the lower part of Figure 24.

Figure 26 is a plan view of the blank from similar to Figure 14, but

- or lips.

in Figure 24, taken from the right.

Figure 28 is a detailed side view, showing a still further modification, wherein, instead of or in addition to, a clamping washer, portions of the metal of the clamping bar are cut and bent inwardly of the bend to form curved clamping jaws Figure 29 is a sectional view of the structure shown in Figure 28, taken on the line 2929 of Figure 28.

Figure 30 is a top plan view of the structure shown in Figure 28.

Figure 31 is a view similar to Figure 28, but showing a still further modification wherein a clamping block, separate from the clamping bar, is held by the bolt and is adapted to be forced by the bolt and nut into clamping engagement with the cable; and

Figure32 is a perspective view of the clamping block shown in Figure 31.

Referring to Figures 1-3 inclusive, A and B represent in section two cables adapted to be connected by the device C. Thedevice C comprises a connecting bar IU of highly conductive material, such as copper or copper alloy. This bar, as shown in Figures 1 and 2, is bent into approximately 2 shape, having reverse curved bends l5 and I6 at the comers of the Z, the inner surfaces of which, as will be seen, are in contact with the surfaces of the respective cables A and B, or this device may be used to attach a multiple of cables at either or both ends. The cables attached ateach end may be either all of the same diameter or of different diameters. The bar I0 is formed with a central elongated opening II, shown more clearly in Figure 3, and bar I 0 is also 1 formed with slots I 3, which extend inwardly from opposite ends of thebar, the sides of the slots preferably being straight. A bolt II, having a head I8 and a nut I3, extends through the slot I I and when the device is to be clamped to the cables A, B also extends through the end slots I3 of the bar I0.

Figure 1 shows, in full lines, the position of the bolt and nut as the nut is about to be tightened and, in dotted lines, shows the bolt and nut in their positions when the nut has been tightened to cause the bar IIl.to clamp the cables A and B.

The strap I0, it will be noted, is of substantial thickness relative to the cable, and is adapted when bent by the bolt around the cable to exert the requisite clamping force and to form a firm electrical contact with the cable, and at the same time provides the requisite current carrying capacity. In the form oi.- invention such as shown in Figure 1 the angles between the portions of the bar at opposite sides of the cable embracing bends in'the unclamped position of the bar, are

each approximately 20, .while in the clamped position these portions are approximately parallel or slightly convergent with the bolt head and nut pressing substantially flat against the outer face of the bar.

In certain cases the angle between adjacent portions of the bar in unclamped position may be more or less than 20.

In Figure 2 I show in full lines the bolt swung into a position which permits the cables A and B to be inserted in their respective bends of the bar n, without removing the bolt II- from the opening I|. When the parts shown in Figures 1 and 2 are assembled the screw-threaded end of the bolt I1 may be peened over as indicated at 20, so as to prevent removal of the bolt and at the same time permittin the connecting .device to be attached to the cables. It will thus be seen that as manufactured the connecting device may consist of permanently attached parts and there is no likelihood that one part may belost or misplaced or otherwise separated from the remaining parts. I may in certain cases, however, employ a form of bar shown at 20 in Figure 4, wherein,

instead of slots I3 I employ somewhat elongated openings 2| in place of the end-slots I3. In the latter case the nut I9 will be removable from the bolt to permit the parts to be assembled. Any of the bars shown may be formed with ridges 22 to improve the grip on the cable.

Where slots are employed at the ends of the clamping bar, in order to prevent any possibility of a bolt slipping out of the slots during the clamping operation; I may form the bar with offset portions 23, adjacent to the ends of the slot, which form an obstruction to any movement of the bolthead, as shown in Figure 5, out of the end-slot. Also, if desired, to permit tightening of the nut I9 by a single wrench applied to the nut, without the necessity of manually holding the bolt against rotation, I may employ the carriage bolt 25, having a square shoulder 26, which fits into the end-slot I3, and thus prevents the bolt from turning.

Also as a means for holding the bolt ends in the end-slots of the bar, I may employ a bar of the form shown at 28 in Figure 8, which is formed adjacent the end-slots with side recesses 29, adapted to receive the downwardly extending end portions or lugs 30 of a washer 3|, shown in Figures 7 and 9, formed with an opening 32, through which passes the clamping bolt II.

It will be necessary generally to provide means at one end only ofthe clamping bar, to prevent slipping of the bolt ends out of the end slots. However, the washer 3| shown in Figure 9 also prevents spreading of the portions of the clamping bar adjacent the end slots and for this reason at times it may be desirable to use a washer at both ends of the bar.

In Figures 10 and 11 1 show a modified form of washer indicated at 35, which is provided at its sides with downwardly extending portions 36, adapted to fit into the recesses 29 and which are cut to form clamping faces 40 which, in the clamped position of the connector, are firmly pressed into engagement with the outer surface of the cable A, thus forming an additional contact area for transmission of the current from the cable, as well as increasing the clamping action on the cable.

The washer shown in Figure 10 mayobviously be employed with a clamping bar formed with reverse bends or with clamping bars of other forms for making other types of connections.

Instead of employing a carriage bolt with a square shoulder 26, as shown in Figure 6, I may provide the bolt 42 shown in Figures 12 and 13, which is formed with a shoulder 44 of elliptical or non-circular cross section. The surface of the. shoulder 44 along the minor axis of the ellipse merges with the cylindrical surface of the shank of the bolt 42 as shown in Figure 13 and received in, and engage the side of, the elongated opening 32 in the clamping washer 3|. It will, of course, be understood that the bolt in connection wifli the constructions disclosed in any of the previous figures.

42 may be employed In igure 12 I also disclose a clamping bar 46 which is formed with bends 41 adapted to receive conductors or cables of difierentdiameters. Thus, at the upper portion of Figure 12, I disclose a cable or other cylindrical body A which fits snugly against the inner surface of the bend 41 of the clamping bar and also a cable A" which is spaced from the inner surface of the bend 41 and is held adjacent to the clamping bolt 42. A similar bend adapted for the reception of cables of different sizes is also shown in the lower part of Figure 12.

v In Figure 14 I show diagrammatically a clamping bar 50 formed with a bend for receiving a relatively large cable at its upper portion and with a bend'of less radius at its lower portion adapted to receive cables of different sizes.

Figure 15- is similar to Figure 14 but shows the application to the upper 'endof the clamping bar of the washer 35 provided with its clamping face 48.

Where it is desired to secure together more than two cables, a construction such as shown diagrammatically in Figure 16 may be employed, wherein clamping bar 52 is provided with three bends within each of which is received a cable. Such a bar would be provided with two openviously described.

On examination of Figure 1, which shows in dotted lines the bolt and nut in clamped position, it will be seen that when'the nut has been screwed on to the bolt into clamping position, a considerable length of bolt will extend below the nut. To" remove the downwardly extending unused screw-thread end of the bolt after the connector has been applied, I may form a bolt with a reduced weakened portion 60 as shown in Figure 1'7. This figure shows the nut 19 in full lines in unclamped position and in dotted lines in clamped position. It is obvious that ings 58, as well as end openings or slots as prewhen the nut has been screwed onto the bolt to the position shown in dotted lines, the lower end of the bolt may be removed by breaking the bolt at the weakened portion 68.

I may, if desired, provide the lower end of the bolt with means to prevent removal of the nut, as is shown for example in Figure 1. It will, of course, be understood that when the parts are connected or inseparable as shown in Figure 2 and washers or equivalent bolt holding means areused, the bolt will be of sufficient length to permit the bolt to be swung into position to adplied to the bar with one or the other pair ad-,

jacent the cable.

The washer 12 is formed with the central opening 32 for receiving the clamping bolt and is bent or turned at its sides to form downwardly extending portions 16 adapted to be received 'in the recesses or notches 29 of the clamping bar and these downwardly extending portions are laterally ofiset at 16' and continue downwardly and are formed at their ends with clamping jaws 88. In order to provide a substantial area of clamping surface, the metal of these extensions is turned outwardly at 19 to form the clamping surfaces 13 and 14.

Inasmuch as a cable A of smaller size when clamped in the bend of the bar will be positioned farther inside the bend than a larger cable A (as may be seen, for example, in Figure 19), and as a result, the smaller cable will be positioned farther away from the washer-receiving notches 29 of the bar, I 'form the washer with the clamping faces 13 of lesser radius at a greater distance from the parts of the washer en- "gaging the notches than the clamping faces 14 of greater radius. The clamping surfaces 13 and 14 are curved to conform ordinarily to the curvature of the surfaces of the cable to be clamped and the positions of these surfaces are such as toin'sure eifective clamping against their respective cables.

The downwardly extending portions 18 are offset at 16' so as to permit the washer to be re- .moved from the clamping bar.

In the form of invention shown in Figures 24-27, inclusive, instead of forming the washe with downwardly extending lugs adapted to be received in notches in the clamping bar, I provide a washer 89 with a pair of .pins 90 adapted to be'received in a corresponding pair or in one .of 'a' series of corresponding pairs of openings 92 formed in a clamping bar 93. It will be noted that in the construction shown in these figures the pins 90 are located at opposite sides of the mit the cables into the bends of the bar without withdrawing the bolt from the opening II.

In the case of cables of relatively large diameter when it is desirable to provide for increased clamping stress or to provide greater cross sectional area, of the current carrying clamping plate, I may form this plate with two or more end-openings 62 as shownin Figure 18 or slots and a corresponding number of intermediate slots 63 with' a corresponding number of clamp"- ing bolts which, in the clamped position of the connector, will be positioned parallel to one another.

Referring toFigure' 19, I show a clamping bar 18 with'the bolt 42 having a shoulder 44 of elliptical cross section, the bend of the strap being adapted to embrace alternately cables A and A'.

In Figures 20' and 23, 'I show a clamping washer 12 formed with two' pair of' curved clamping'faces -13and 14. Either pair of clamping f faces may be employed, depending on the .size

bolt-receiving opening 94 and the two openings 92 of each pair are located at opposite sides of the elongated bolt-receiving recess l3 in the end of the bar 93.

In place of receiving pins, I may stamp out one or more tits from the metal of the washer.

The washer 89 is formed with .side flanges 95, extending over the outer edges of the clamping bar and as shown in Figure 25 the metal of each flange is turned outwardly at one end to form a clamping jaw 98.

When the clamping bar is formed with a number of pairs of openings 92 as shown in Figure 26 it is obvious that the pins 90 may be inserted in any pair of openings, depending upon the size of the cable to be clamped. Thus, in Figure 24, I show the washer 89 in full lines with the pins in! serted in the outer pair of openings 92, this position being adapted to clamp the cable A, and I show in this figure in dotted lines the pins 98 inserted in the middle pair of openings 92 in which position the clamping jaws 98 are adapted to engage a cable A. v

I may form the washer with pins and flanges as shown in Figure 25 and also provide this washer with two pair of clamping jaws as shown, for example, in Figure 20. When two pair of clamping jaws are employed, the pins 90 will not ordinarily bepositioned midway between the jaws, as it is desirable to position the jaws of lesser radii nearer to the bend of the clamping bar than jaws of larger radii. It will be clear, with a washer of this construction, with a proper spacing from one another ofsuccessive pairs of openings in the clamping bar, that when the pins are inserted in one pair of openings two-cables of different sizes may be clamped, depending upon in which position the washer is applied to the bar, and when the pins are inserted in the next pair of openings two other cables of difierent sizes may be clamped, all four cables being of different sizes.

In the form of invention shown in Figures 28-30, the clamping bar I is formed at opposite sides of the bend I03, with one or more cutaway portions IOI which are bent inwardly to form clamping jaws or lips having clampingfaces I02.

Such clamping lips may be formed on either or both sides of the bend in the bar and in Figure 28 I show two clamping lips on the inner side of the bend adapted to engage cables respectively of different sizes.

The construction shown in Figures 28-30 is particularly advantageous where the double bend clamping bar is employed to form a branch connection from a continuous supply cable. Thus the upper bend of the clamping bar may be formed as shown, for example, in Figures 1 and 2, which permits the cable to be inserted in the upper bend and the lower portion of the connector may be formed as shown in Figure 28, which permits the end of the branch cable to be inserted laterally into the lower bend of the clamping bar.

In Figures 31-32 I show a clamping block I 09 formed with a clamping face I I0 and an opening I adapted to receive the clamping bolt as indicated in Figure 31. In this embodiment it will be noted that the block I09 is not fixed to the clamping bar and the clamping action on tightening the bolt is in the nature of a wedging action.

Having now described my invention, what I desire to secure by Letters Patent is:

1. In an electrical connector, a clamping bar having reverse bends adapted to embrace and to be clamped against cables at or near. the bends, said bar having an opening intermediate its ends and having cutaway portions at opposite sides of the opening and a bolt extending through said opening and cutaway portions and serving to force the bar into clamping engagement with the cables.

2. In an electrical connector, a clamping bar having reverse bends adapted to embrace and to be clamped against cables at or near the bends, said bar having an opening intermediate its ends and having cutaway portions at opposite sides of the opening and a bolt extending through said opening and cutaway portions and serving to force the bar into clamping engagement with the cables, portions of the bar at opposite sides of the bends forming, in unclamped position of the bar, an angle of approximately 20 degrees to one another.

3. In an electrical connector, a clamping bar having reverse bends adapted to embrace and be clamped against cables at the respective bends, said bar having an opening intermediate its ends and slot extending inwardly from opposite ends, a bolt extending through said opening and slots and between the cables, and adapted to force the bar into clamping engagement with the cables, and means preventing angular movement of the bolt out of the slots when in clamping positions.

4. In an electrical connector, a clamping bar moval of the bolt from having reverse curved bends, said bar having an elongated opening intermediate its ends and slots extending inwardly from opposite ends, a bolt extending through said opening and slots and between adjacent bends and adapted on tightening to cause said bar to clamp the cables at opposite side of the bolt, a nut on said bolt, said bolt and nut when untightened adapted to be swung in said opening to remove the ends of the bolt from the slots to a position to provide space for insertion of a cable into a bend.

5. In an electrical connector, a clamping bar having reverse curved bends, said bar having an elongated opening intermediate its ends and slots extending inwardly from the opposite ends, a bolt extending through said opening and slots and between adjacent bends and adapted on tightening to cause said bar to clamp the cables at opposite side of the bolt, a nut on said bolt, said bolt and nut when untightened adapted to be swung in said opening to remove the ends of the bolt from the slots to a position to provide space for insertion of the cables into their respective bends and means to prevent removal of the nut from the bolt.

6. In an electrical connector, a clamping bar having reverse bends therein and adapted to clamp a cable inside each bend, said bar having openings intermediate its ends and between bends and cutaway portions at opposite sides of said openings, a bolt extending through said openings and cutaway portions and a nut on said bolt, said bolt and nut being adapted to force the said bar into clamping engagement with the cables and means for preventing rotation of said bolt as said nut is screwed onto the bolt.

7. In an electrical connector, a clamping bar having reverse bends therein and adapted to clamp a cable inside each bend, said bar having openings intermediate its ends and between bends and cutaway portions at opposite sides of said openings, a bolt extending through said openings and cutaway portions and a nut on said bolt, said bolt and nut being adaptedto force the said bar into clamping engagement with the cables, said bolt being formed with noncircular portions adapted to cooperate with said bar to prevent rotation of said bolt as said nut is screwed thereon.

8. In an electrical connector, a clamping bar having reversed bends adapted to clamp a cable near the bends of said bar, said bar having openings intermediate its end and slots extending inwardly from the end of the bar, a bolt extending through said opening and slots and a nut for said bolt adapted to force the bar into clamping engagement with the cables, the material of said bar being ofiset adjacent a slot to prevent the bolt from moving out of the slot in clamping position.

9. In an electrical connector, a clamping bar having reversed bends adapted to clamp a cable near the bonds of said bar, said bar having openings intermediate its ends and slots extending inwardlyi'rom the ends of'the bar, a bolt extending through said opening and slots and a nut for said bolt adapted to force the bar into clamping engagement with the cables, the material of said bar being offset adjacent a slot to prevent the bolt from moving out of the slot in clamping position, said opening in said bar being of sumcient length to permit said bolt, in released position, to be swung out of the slots without rethe opening, to enable the cables to be inserted into the resnentivn 1mm.-

, slots extending inwardly for said bolt, said bolt serving to clamp cables at the bends, and means for preventing removal of the bolt and nuts during clamping and in clamped positions, said means consisting of a washer having offset portions seated in said recesses.

11. In an electrical connector, a clamping bar having reversed bends along its length, said bar having an opening between the bends and having slots extending inwardly from its opposite ends and having recesses adjacent one slot, a bolt extending through said slots and opening, a nut for said bolt, said bolt serving to clamp cables at the bends, and means for preventing removal of the bolt and nuts during clamping and in clamped positions, said means consisting of a washer having offset portions seated in said recesses, said ofiset portions being formed with extensions adapted to be moved by said bolt into clamping engagement with the cable.

12. In an electrical connector, a clamping bar having a bend therein, said bar having openings at opposite sides of the bend, a bolt extending through said openings, a nut for said bolt, said bolt and nut being adapted to force the metal of said bend into clamping engagement with a cable and a washer for said bolt, said washer having extensions said extension adapted to be moved by the clamping movement into clamping engagement with the cable.

13. In an electrical connector, a clamping bar having reverse bends adapted to embrace and be clamped against a conductor said bar having an opening intermediate its ends and cutaway portions at opposite sides of the opening, a bolt extending through said opening and cutaway portions, a nut for said bolt said bolt and nut being adapted to force the ends of said bar toward one another and said bolt being formed adjacent its screw threaded. end with a weakened portion adapted when said nut has been screwed onto said bolt to a position beyond said weakened portion to be broken so as to permit the extreme screw threaded end of the bolt to be removed.

14. In an electrical connector, a clamping bar having a bend therein, said bar having openings at opposite sides of the bend, a bolt extending through said openings, a nut on said bolt, said bolt and nut being adapted to force the metal of the bend into clamping engagement with a cable, and a washer having an opening to receive said bolt, said washer having lateral extensions formed at opposite ends with curved bearing surfaces of different radii adapted to be moved by the clamping movement to cause one or the other of said surfaces to clamp the cable.

15. In an electrical connector, a clamping bar having a' bend therein, said bar having openings at oppositesides of the-bend, a bolt extending through said openings, a nut on said bolt, said bolt and nut being adapted to force the metal of the bend into clamping engagement with a cable, and a washer having an opening to receive said bolt, said washer having lateral extensions formed at opposite ends with curved bearing surfaces of different radii adapted to be moved by the clamping movement to cause one or the other of said surfaces to clamp the cable, said bar being formed at its sides with recesses adapted to re- .ceive said extensions, to prevent movement of said washer along said bar.

16. In an electrical connector, a clamping bar havinga bend therein, said bar having openings at opposite sides of the bend, a bolt extending through said openings, a nut on said' bolt, said bolt and nut being adapted to force the metal of the bend into clamping engagement with a cable,

. of said bend and a washer having an'opening to receive said bolt, said washer having lateral extensions formed at opposite ends with curved-bearing surfaces of different radii adapted tobe moved by the clamping movement to cause one or the other of said surfaces to clamp the cable, said bar being formed at its sides with recesses adapted to receive said extensions to prevent movement of said washer along said bar, the respective bearing surfaces at opposite ends of each extension being positioned at different distances along said bar from the recess.

17. In an electrical connector, a clamping bar having bends therein and having elongated openings at opposite sides of the bend and other openings along said bar at one side of said first mentioned openings, a bolt extending through the said first named openings, said boltand nut being adapted to force the metal into clamping engagement with a cable, and a washer for said bolt, said washer having lateral extensions adapted to be moved by the clamping movement into clamping engagement with said cable, said washer having p adapted to be received into one or another of said second named openings to prevent movement of said washer along said bar.

18. In an electrical connector, a clamping bar having a bend therein, said bar having openings at opposite sides of sa'd bend, a bolt extending through said openings, a nut for said bolt, such bar being formed with a cutaway portion, bent inwardlyv of the bend to form a curved clampin jaw and said bolt and nut being adapted to force the metal of said bend-and said jaw into clamping engagement with a cable.

19. In an electrical connector, a clamping'bar having a bend therein, said bar having openings at opposite sides of the bend, a bolt extending through said openings, a clamping member held by said bolt and separate from said bar, a nut on Y said bolt, said bolt and'nut being adapted-to-force the metal of said bend and said clamping member into clamping engagement with a cable.

20. In an electrical connector, a clamping bar having a bend therein, said bar having openings at opposite sides oi? the bend, a bolt extending through said openings, a washer for said bolt, having side extensions cut away at one end to form clamping faces, said bar being formed with side recesses adapted respectively to receive said extensions and a nut for said bolt, said nut and bolt when tightened being adapted to force the material of said bend and said faces into clamping engagement with a cable.

RAYMOND T. ROTH.

a nut for said bolt,

or tits cut out from the metal of the washer,