US1851271A - Switch - Google Patents

Description

March 29, 1932. A. ALSAKER- SWITCH 5 Sheets-Sheet 1 A. ALSAKER March 29, 1932.

SWITCH 5 w 8 fl K MN MN MW. .%.%MN 5 w w & w w .w mm m FMN d M Q F m. K a 0 vs v @MN Q HHEH A Ar- I I O A. ALSAKER March 29, 1932.

SWITCH Original Filed Sept. 27, 1926 5 Sheets-sheet 4 Patented Mar; .29, 1932 r Altman ALSAKER, or cnrcaeojrnnrnors,nssrenonro-i'rnn nnn'ra sran 'nhnc'rnrcf COMPANY, OE'CHIGAGO, ILLINOIS, A CORPORATION :OF ILLINOIS SWITCH I i r 1.851211% Original application filed September- 27,1326, Serial Nol137, 92?, new" Patent in. 1,815,392, da e July 21*, 1931. Divided and thi application filed. December 3, 1928. Serial 7N0.3}23,236.," I

This appl ic-ati'on is a division of mycopending application .Serial No. 13759275 filed eptemberQT, 1926, now .Patent 1,815,392,

.dated.July2l,193L v My inventionrelates tofdisconnect switches. Since the number ofidisconnect switches in I 'a distribution system of even moderate -size.

' runs into considerable quantt V ity', individual cost is an important item. v

Inherently, a switch of this class must hav two contact members. at'least oneof which shall, be movable. I Thesecontacts must be suitably supported on insulating members, I

and the means for separating the contacts *must be insulatedifrom the contactsj The contacts must provideagood conducting sufficient Separation to'meet the voltage re-' path when closed; I They must he capable of V quir'ement and theymust close satisfactorily and accurately 2111(11611 121111 in serv ce indefinitely.

The aim of'the present invention is to-pro-'- vide a form of swltch which. Wlll requ re a minimum cost, but providethe essential operating features and give the desired continuity of operationand satisfactory service.

In consideringthe cost of construction it' is foundthat. the insulators, particularly when theswitch is to operate at considerable. voltage,isalarge item.

In the present switch'I have, therefore, adoptedthe two insulator construction as involving the minimum number of insulators.

; The length of opening which the switch must provide depends upon the voltage under which the switch must operate. In the pres; ent switch I provide two movable arms in;

1 order to avoid the necessity for along single;

arm.

Along single arm is more difiicult to open and more difficult to support and to guide. It hasthe clii'ficulty, furthermor'e of decreasing the clearance between phases.

In my switch I move both ofthe arms v pivotally on the insulators opposite ana gular direction so that the two arms move to the same side of the line joining the insulators for opening and closing movement;

The length of thearms is, therefore, substan-' tially half of the distance between the insulators,andwhenthe arms stand of]? sidewise they point'in the same direction' and extendonly half ofthe distance between'insm".

lators. I

In the' preferred form of my invention the insulatorshave the dual function of serving as anchors .for the adjacent ends of the line and, at the same time, as'the spindle or shaft for swinging the arms away from or towards ingto secure the necessary accuracy of alignment. A closeqfitting bearing on outdoor work is well nigh out of the question becauseof freezing, corrosion, etc. I have solved the problem by the useof a special bearing, name- 1y," a ball bearing which is introduced not;

particularly on. account of its low friction, al though that is. useful, butbecause I have found that such abearing gives .thenecessary accuracy andyjat the Sametime, provides means for breaking ice or corrosion which I mightotherwiseblock theswitch. This feature is claimedmore' broadly in my co-pending application, Serial No.11375926-{filed Septemben 27,1926.

I provide an improved iform of bearing. and connection for jmechani'cally supporting 1 the line wire and for electrically connecting and connection may be quickly and easily assembled or disassembled, but is positively,

locked together when the; switch is in nor mal position.

Arontimious non-jointed connection is formedbetween the terminal of the line and so it to the movable switcliarm. This bearingfj insulator. In the modified form of my invention this flexible leader may extend all the way from the terminal to the switch con tact, but at all events the leader shunts the mechanical joint or bearing between the stationary line terminal and the swinging arm or contact.

Another feature of the invention is the novel construction of the blade member, and especially of the split contact or contact jaws for one of the blades. This contact comprises a pair of spaced jaws which are mounted mechanically on the end of one switch arm through suitable springs. Electrical connection betweenthejjaws and the arm or its terminal is had by means of stranded flexible leaders which have their respective ends s'e-- cured to the jaws and the blades. By this construction, I am able to get suitable contact between the co-operating switch members even though one of them or both of them may be slightl out of alignment. This result is achieved y a novel spring structure which permits the jaws to twist slightly.

There are also certain other features of the invention, which will become more fully apparent from the following specification when taken in connection with the accompanyin drawings.

n the drawings:

Fig. 1 is a side elevational view of the preferred form of my invention;

Fig. 2 is a plan view taken on the line 2-2 of Fig. 1;

Fig. 3 is a side elevational view of another embodiment of my invention;

Fig. 4 is a top plan view taken on the line 4-4 of Fig. 3;

Fig. 5 is a top plan view of one of the blade members used in the embodiment shown in Fig. 1;

Fig. 6 is a side elevational view of the same;

Fig. 7 is a top plan view of the blade member adapted to cooperate with the blade shown in Fig. 5;

F i 8 is a side elevational view of the blade mem r shown in Fig. 7; I

Fig. 9 is an enlarged side elevation of one of the contactjaws;

Fig. 10 is a sectional view of the bearing assembly for the insulators of the modification shown in Fig. 1;

Fig. 11 is an elevation. of the lever and clevis assemblies;

Fig. 12 is a sectional view of the blade adaptor and a lug support for the modification shown in 3;

Fig. 13 is a bottom plan view of the same taken on the line 13-13 of Fig. 12;

Fig. 14 is a sectionalview of the terminal lug and bearing member therefor used in con nectionwith the modification shown in Fig. 1; and

Fig. 15 is a sectional view of the same taken on the line 15-15 of Fig. 14.

In the preferred form of my invention illustrated in Fig. 1, which shows a disconnect switch of 600 amps. capacity and suitable for 135 k. v., I provide two separate built up insulators and 21. The insulator 20 com- PIISGS, three insulator units 22, which are joined together by suitable bolts 23. The lower one of the units 22 is secured to a bearing member 24 by means of bolts 25. The bearing member 24 is, in turn, mounted on a pair of channels 26 and 27 by means of bolts 28. Likewise, the insulator 21 comprises the insulator units 30 which are joined together by means ofthe bolts 31. The lower insulator unit is secured to a bearing member 32 by the bolts The bearing member 32 is also fastened to the channel members 26 and 27 by suitable bolts 34. The bolts 35, which extend through the sides of the channels and thread intot e bearing members 24 and 32, respectively, serve to further secure these bearings rigidly in place. To hold the channel frame members 26 and 27 in proper spaced rela tionship, I provide the spacing members 36..

These are secured to the sides of the channel members by means of bolts 37. A grounding lug 38 is fastened to one of the channel members and has a lead'wire 39 connected thereto for grounding the switch.

Both of the bearing members 24 and 32 are of the same general structure. The bearing member 24 is shown, in section, in Fig. 10. It comprises a body portion 40 having an integral flange 41, which is provided with openings 42. The bolts 34 are adapted to extend through these openings for securing the bearing member to the channel member. Suitable recesses are provided at the upper and lower ends of the body member 40 for ball races 43 and 44. Obviously, instead of separate races, integral races might be provided. Also, instead of balls, rollers might be used. Rotatably seated on the body 40 is the insulator support member 45. This is provided with a flange 46 having threaded openings to receive the bolts which extend through the base portion of the bottom insulator unit. To permit the support to revolve easily on the body 40, I provide the steel ball bearings 47 which are disposed between the races 43 and 48. A flange 49 integral with the support 45 forms an overhanging eave or water shed.

At the lower end of the support 45, I provide the steel ball bearings 51, which are disposed between the ball races 44 and 52. The ball race 52 rests on a suitable cone 53 which is threaded to the lower end of the support 45,

' and has its lower end 54 milled off to provide facets for engagement by a wrench. To look the cone 53 in position, I employ a lock nut To lubricate the bearing surfaces andthe ball bearings, I provide a grease cup or grease plug 56, which extends through the side of the body 40. It will be noted that the only a point-fof co'ntact betweenvtherevolvablesupe -portt5:and the body 40 is throughrthe ball" bearings 47 and 51; The surta'ce area exposed in this-wayis very small, and :incase offreez-c ing, or; corrosion, the parts {may readily; be

broken apart; It will also-be noted that the bearing: surfaces are: fully protected from. rain and sleet. r i

y L Disposed substantially centrally between. 'the twogroups ofinsulators and 21, respectively, on the channel members 26 and 275' is *thecentra'l" bearing'member' 59. This'bearing member isof substantially the same construca tion as that illustrated in Fig; 10,' except that the lower end of'the revolva-ble support. 4:5 isma'de longer, so-that suitable actuating mechanism maybe fastened thereto. The extended portion ofthe. bearing'meinber 59is I ly be called-the, control bearing, is secured designated by the numeral 60. The central bearing'member 59, which may alsoproperto thechannel members-26 and '27, .respec} [59 has an octagon shape With a groove 60 tively, by means of the bolts 61 and62. The lower end portion 60-of the bearingmember formedabout the same. lever 60, having a split hub is adapted to be clamped together by bolts 60 upon the end portion 60 in any one of eight positions. 3 Ahead 60' is formed 1 on'the inner side of the hub to fitthe groove 60 to keep .the hub from jarring endWise oil of the shank of the spindle 60. To the up per end of the revolvable supports, I secure the separate lever arms63 and 64 by bolts A clevis '66 is'pivotally connectedto the end of the arm 63. A'pipe67 connects the clevis 166 with another clevis, 68' which; in turn; isfl-pivotally connectedto a lever 69 bolted to the flange at the upper end of the revolvable, support of the bearing member ment maybe nade.

24 by 'boltsp70. 7 Likewise, the free end of the lever 64 is pivotally connected'to' a clevis71.

Apipezor rodl r'2connects the clevis T7]. with a clevis 73 which is pivotallyconnected to a lever' f l fastened by bolts 75 to the'fiange on; the upper end: of the reyolvable support of the bearing member 32-. It will b'e'noted that turning the; lower end 60; of the bearing member 59 that the rotary motion imparted j theretoiwill be transmittedby the links which.

are'connected to the movable parts of bearing - members 24 and 32,, respectivelyf Hence,-

any'desired angular movement of the insular torgroups 20 and 21 may be obtained by simply Varying thelengths of thelinks which interconnect each of these groups with the f.

central bearing member'59. The clevises 771 and 66 arethreadedto the pipes67 and 7 2 andheld by suitable: lock nuts so that adjust-1;

The flanged mountingmeinber 81i-s bolted by bolts 83 tothe'upper endof the insulator "group- 20. the, mounting member 801s bolted; by bolts83 the left-hand switch arm.

The switch arm 82 comprises.a'T shapedrei-i v enforcing member 84: to, which is bolted, by the bolts 83,, a flat bar conductor 85. As

shown more fully in Figures5 and 6, itc.w'-ill benoted that the conductor or bar 85 "has" both of. its endszextendingabeyondthe ends of the T-shaped member 84. To one of these endsissecured the flexible cable or conductor 863135! theplate member 87 and the bolts 88. Theopposite end of the conductor 85 serves to make contact with a pair of cooperating jaws and it is provided withaigenerally box shaped protecting hood. 89wl1ich theretoby the'bolts 90.-

' Theupperend of the insulator group 21 is member,l secure therighthand switch arm '93. This arm is fu'lly illustrated in Figs. 7 and 8 and comprises a generally T shazped' issecured reenforcing member 94 to the underside of i which is secured a conductor-95 by the bolts '96 which also serve to holdthe blade member 93' on the. mounting member91. The bar;

conductor 95 has both of its ends extending. beyoncl'the ends of the reenforcingvmember" 94. To oneofthe projecting ends Isecure the stranded flexible cable or lead97=by means of the plate 98'and'the bolts 99. At the opposite end Iprovidea novel contactstruc-- tu'reiwhich is adapted to co operate with the conductor 85'. This contact is generally des ignated by the numeral TOO-and comprises a pair of angular flared-jaws; 101 which may be of copper or other suitable conducting ma' terial'; These jaws are spaced from the end 'otthe conductor "bar 95 'and'are connected; thereto bythe stranded flexible conductors l02which are fastened tofthe'inner'ends 0t 1 the jaw members 101." a The jalws 101 are pref-c tions oftubing crushed or collapsed upon-the leads'102. The opposite ends of the flexible "conductors 102 are secured to: the conductor .erably cast'dire ctly upon the ends of the flexv I 'ible leaders 102.v Theymay be made of sec- 95*by suitable plates 103 and bolts 104rwhich; extend through the'conductor95i To hold vthe jaws 101in. place, I provide ajpair of springs ll05 which' aresecured to the lower outer faces of the aws by suitable screws and nuts106. The opposite ends of these springs 105 are held'firmlyto theplate 1 03 by the studs 104. These springs are'preferably, but not necessarily; made :of phosphor bronze.

They not only serve to bring/the contact jaws 101 into firm contact with the conductor 85 when the switch blades are in perfeot-alig'nment, :but will also do so even though they maybe slightly out of alignment. F or this "purpose the jaws are'spa'ced' from the endof the; bar-conductor 95;, thereby permitting 1 the springs to twist or float laterally when 4 a ever necessary topermitthe jaws 101 to make good contact with the contact end of conductor, bar 85.

To the upper side of the blade member 82, and substantially in line with the longitudi- 'inal axis of the insulator group 20, is mountreenforcing member 84. Suitable bolts 113 serve to hold it firmly in place on the web. The member 111 is provided with a hollow 1 ..bore 115 through which the flexible conductor 86 is extended. The terminal lug member 112is adapted to seat on the bearing surface 116 of the bearing member. Extending upwardly from this seating surface is a genizerally cylindrical portion 117 which is adapted to snugly fit in the terminal lug 112. It is provided with an annular clearance or relief 118 which is filled with grease for lubricating the bearing part. Integral with v:the upper end of the cylindrical portion 117 is a lug or key member 119 which is adapted to ride on the bearing surface 120 of the terminal 112. To permit mounting of the terminal 112 on the bearing member 111, I pro- ..vide a keyway 121, which is slightly wider than the key 120 which co-operates with it. It will be noted that all that is necessary to remove the terminal from its bearing member is to bringthe key 119 in line with the key- .way 121. When this is done, the terminal may readilfvl be separated from the bearing member. owever, when both of these are in engagement, as is the case when they are put into service, the key 119 serves to lock ,;the terminal lug 112 to the bearing member 111. Hence, by this arrangement, it is nec essary to turn the switch blade through to 180 before the key 119 will come into-alignment with its keyway 121. In normal use, however, these do not come into register because the switch arm is not turned farenough. A grease cup or alemite fitting 122 extends through a side wall of the terminal 112 and opens into the clearance space 118. The terminal lug has a downwardly extending flange portion 123 on its inner surface. Through this flange portion and through the body of the terminal itself extends an opening into which is securely fitted the flexible cable 86, which closes the upper end of the hollow terminal member 112. The lower end of the hollow member 112 has a' skirt or circular eave overhanging the stud member 115. The

leader 86 preferably is sweated to the terminal so as to insure satisfactory connection therewith. The lower portion of the terminal has an outwardly extending lug 124 to 'which the line conductor 125 is connected by suitable clamping plates 126 and bolts 127.

However, in place of the plates, I mayemploy a terminal lug, as shown at 128 in Fig.1. I have found that this terminal structure permits the switch arm to revolve easily about the terminal member as a pivot.

The switch arm 93 is provided with a bearing member 129 and a terminal lug 128 which are like the terminal lug and bearin member shown in Figs. 14 and 15. The aring member 128 is seated onthe u per edge of Y the T-shaped reenforcing mem er 94am is the embodiment illustrated in Fig. 1, they may be used, if desired. Such horns could be mounted on the blade member in any desired manner.

The modification-shown in Figs. 3 and 4 is shown as better adapted for lower voltages, ranging from to 37 k. v. I provide single insulator units 200 and 201. These insulators are secured to the upstanding base portions of the levers 230 and 235 by suitable bolts. The levers 230 and 235 are, in turn, secured to the bearing members 202 and 203 by bolts 204. These bearings extend through suitable openings-in the channel 205 and are secured thereto by'the bolts 206. Disposed centrally between the bearing members 202 and 203 is the central bearing or actuating member 207. This, likewise extends through a suitable opening in the channel and is secured thereto by the bolts 208.

The central bearing member 207 is substantially like bearing member of the switch shown in Fig. 1, or it may be like the bearing shown in Fig. 12 of my pending application, Serial No. 137,927, above referred to.

Both of the "bearing members 202 and 203 are of substantially the same construction as the central bearing member 207', except that the lower portion 220 to which the actuating mechanism is connected, is cut off.

Thelevers 224 and 225 extend from a central plate 226 which is bolted to the flange 215 of the spindle of bearing 207. The lever 224 is pivoted to a clevis 227 into which is threaded a link member 228. Tothe oppo' site end of the link 228 is fastened a clevis 229. The lever 230 is fastened by bolts 204 to the rotatable flangeportion of the bearing member 202. The free end of the lever 230 is pivotally connected to the clevis 229. Now, it will be seen that by actuating the central bearing memberthat the link mechanism connected thereto also actuate the insulator unit 200 which is mounted to the? bearing member 262. ,Theistructure for actuating theinsulator unit 201 is exactly the same as that employedfor actuating the insulator unit 260; j It" comprises the clevis-23 2, whichis'pivotally connected to thelever 225 {at one end andhas a linkmember'233 secured'to it at 7, its opposite end. Connection betweenthe lever andthe-bearing member203 is had by meansiof a clevis 234: w'hichis secu-recl to the link-233 and 'alever 235 to which the clevis is lpivotall yconnected "I The lever 23 5 is secure'd 'to the spindle ofbearing' member 203 by the, bolts 204. The'Ycha-nnel 205 has a;

grounding lug 236,

To the upper end of the insulator 200 is secured'the bracket clamp-240. r This bracket is ilhistratedin *Figs'q12"and13. Itcom rp-ri sesthe clamping socket 241 the base pordea-242', and the bearingsupport 243 The clamping socket241jreceives the end of the fttibuflararm 244.1 This clamping socket is split fema the bolts 245 for shrinking it.

T hegbase portion 242 isadapted to seat on' the topof'theinsu-latorunit 200 and lS'SGCUIGd thereto by means of the cap screw 246 which extends through the hole 247 into threads in the cap oifthe insulator. Dowel pins 248 are :seat'ediin registering, recesses in the base 24:2 and the insulator cap; The bearing support 1243 has the generalishape of acireular convex shell. It has an axial threaded opening through which is threaded. the end ofa shouldered bearing pin .249 which is *held to the mountingmember24-3 by means of a lock nut 2530; "Th Pin-249 has a shank of a diameter larger than that of the threaded end. Fitted ,over the shank portionof the ;.term1nal 249 is the terminal lug, 25,1?v This is provided with aclampingiend'252and a diagonal porction 253; "Thediagon'al p0rtio n253 terminates'in a" generally circular head 254: whlch fits overjthe bearing pin 249. The upper side oftthe "head 254; has-a conical ball race 255 and the lower sidehasasi-mila'r ball race 256.

fl'llhese races; containijsteel balls 25 6 and 259 x which 'arefconfined ibfitWBQI-li the races and suitable end bearings. 1 The lower bearing'is ar ed "bythe he d Qf the pin 249- 116. the

upper-bearing isfformed bya block 260 wh ch rests against "the bottomvof the bearing supn port 243i' To connectthe clamping portion 252o-fthe terminal lug2'51 to the line conductor "261 I provide the clamping plates ,262

and the bolts-263.1. To the underside of the clamping 'flportion '2521is secured a flexible stranded ribbonor conductor-264 ajclamping plate-265 and the bolt's263 and nuts 266. The blade member 244, which is securedto the terminals240,comprises a coppertube whichhas'thel'slits 271 out 'intoiiti-n'a vert'icalplane at the end, which fits into the clamping portion 2tl. Thestranded ribbon 264'extends through the pipe'270and 1nto the '262and bolts 263.

276 for guiding forward end which is fia-tteneduponjtheend of the ribbon." This flattened end 272' forms a mounting for contact j aws 276. At its rear 3 end the ribbon 264'is clampedto the terminal 252and't0 the line conductor 261 by, plates The'jaws- 276 are fiat pieces of casti copper, brass,-or bronze, which are castuponthe outer ends: of flexible stranded leaders' i273 and have outwardly divergingior flared lips on the arm 285.

partsfof projecting" pins 278 .co-operatin'g, I

with leaf springs277 which have holes loosely V fitting upon the shanks of said pins and restr mg against ;the convex bases thereoi [The pins haveheads for preventingaccidental Fig. 10A and asdescribed in the j foregoing disengagement from the springsasighowfifin embodiment.

' The jaws 276 and their mountings upon the in'Figsq8 andQabove.

-T he springs 277 and flexible/leaders 273 the co-operating. contact 276 I The jaws 276 have" upon their "outer sides fiat portion 272is like the structuredisclosed v are-clamped to the flattened end 272 bolts 275 and plates 274.

The switch'arm 285 also consists'o f a piece of copper tube clamped by'the split jclam-p plit clamp fheretoconductor term-m a Switchblade contact28'Z.

If desired, a protecting hood may cover the jawsi276 and "adjacent parts; i 't i v In the operationo f the above described forms of switches the arms rotate 'in oppo- 'Thisblade'contact 287 adapted to enterfb'er' tween the fi aws 27 6 whenth'e switch is closed.

site angular directions with the result'thatthe movement of the contactsis; concurrent upon one side of the lineofthe insulatorsjfor closing-movement and divergent on the same side of the line for opening movement; I c 1 The arms are designed to move frbm a position of substantia'llydirectali-nement when closed to a position of substantially parallelism when open. The armsextendingfrom' the central hea ing" a dzfmmthe r tary I sujlators are-so designed fas to secure; this i a movement upon substantially 90? of move;

ment from vthe central actuatingspindle; but it will. be apparen tha ,th angu e i e .tions may hevaried changingthe linkn wwivs'hto emphasiz anothe mpo tan feature of my invention, namely, that small variations in angular position. are immaterial. Even if the switch arms are not accurately' in a straight =line Whenthe switch is closed, the contaet is not afiected forabout tively in the patent statutes,

the first fifteen degrees of movement the contacts do not separate because they move relathe same direction, i. e., laterally to one side and the endwise movement is Small. This has another important result, namely, that the first part of the movement exerts a very great force for breaking ice or corrosion.

If the adjustment of the connections is not accurate as forexample, if three switches in the three phases of a line are not all exactly angularly alined, no failure to make contact occurs because the contact extends over a relatively large part of the movement at the inner end of t e path. 7

It will be observed that the diverging lips Tonthe jaws extend out endwise and that the contacts engage substantially endwise with a wiping and turning motion. This is beneficial in securing and maintaining good contact. The jaws are mounted for universal movement on the pins and hence tend to aline themselves with the knife or blade contacts. The guiding and holding springs do not permit unrestrained sidewise or cndwise movement of the jaws and hence do not permit the flexible leaders to be subjected to undue stresses.

In each modification the switch arm comprises a reenforcing arm for the sake of strength and rigidity, and a low resistance conductor in parallel therewith. The low resistance conductor shunts the rotary joint and hence the rotary joint does not interpose any resistance.

A further feature of my invention resides in the directness of the connection through the switch with a minimum loop eflect. The loop effect is undesirable because of the destructive magnetic stresses which develop on heavy current flow. Attention is called to the fact that in the modification shown in Fig. 3 the electrical connections through the switch form practically a straight line with aminimum of loop effect. c

In compliance with the requirements of p I have herein shown a few preferred embodiments of myinvention. It is, however, tobe understood that my invention is not limited to the precise structures shown, the same being merely illustrative. What I consider new and desire to secure by Letters Patent is 1. In combination, a flexible conductor, a tubular blade member having a flat deformed portion at one end, said flexible conductor extending through said blade member and being secured in said deformed portion, a pair of contact jaws, flexible conductor means electrically connecting said jaws with said blade member, and a pair of spring members for mechanically connecting said jaws with said blade member. I i

2. In a switch, a tubular arm, and a flexible stranded conductor in said arm, the endof said arm being collapsed flat upon the ennductor to form a switch contact. p

3. In a switch, a tub lar arm, a flexible stranded conducting ribbon in said arm,the

end ofsaid arm being collapsed flat upon the conductor, and a pair of jawsmounted upon lator, and a line terminal mounted on said.

bearing member.

5. In combination, an insulator, ablracket mounted on the'insulator, said bracket comprising a base, a tubular split socket for clamping a tubular switch arm disposed laterally of the base, a bearing supportintegral with the socket, a bearing member on said support axially in line with the insulator, a. line terminal mounted on said bearing member, a

tubular switch arm in said socket, and a flexible cable connected to saidline terminal and extending into said tubulararm. l

' 6. A bracket member comprising a base portion for mounting on an insulator, a

clamping socket integral with said base, a

bearing supporting portion integral with said clamping portion, a bearing thereupon, and a terminal lug pivotally mounted on said bearing. I I i 7 In combination, an insulator, a terminal secured thereto, said terminal having a terminal lug pivotally connected thereto and an integral clamping portion, a line conductor leading to said terminal means for securing said line conductor to said terminal lug, a blade member secured to a clamping portion of said terminal, and a flexible conductor electrically connecting said line with said blade member.

8. A support for switch blade a line terminal, comprising a pair of spacedplate like members one above the other and the upper one being concave downwardly, said members merging'with one another at one end thereof to form an integral'structure, a switch blade holding portion formed at their merged end, the opposite end being open, means mounting one of said plate like members for rotary movement, a bearing disposed between said plates with its axis coincident with axis of rotation of said su port, and a terminal lug mounted on said aring and extending through said open end, the opening being large relative to said lug to permit relative turning between the lug and the support about the bearing axis as a center, and the upper one of the plate'like members overlying the bearing and acting. as a watershed therefor. v I

9. A switch blade comprising a mounting a tubular switch arm disposed lat member having an upper portion of an inverted dish shaped formation mergingalong one end With a mounting base spaced below the same, means for'mounting' the baselfor rotative movement, a switch bladeportion extending from the merging portion, a bear ing mounted between the upper and lower por-v tions and in alignment with'the axis about which the blade rotates, and a line terminal 9 ournaled in said bearing said upper portion overlying said bearing and acting'as a Watershed therefor; i a p I In ,Witness whereof," Lhereunto subscribe my name this 26th day'of November, 1928. I ALFRED ALSAKER.

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