US2729710A - High tension electrical switches - Google Patents

Description

Jan. 3, 1956 'r. F. JOHNSON HIGH TENSION ELECTRICAL SWITCHES 4 Sheets-Sheet 1 Filed Oct. 7, 1954 INVENTOR TOMLINSON F. JOHNSON BY MYM ATTORNEYS Jan. 3, 1956 'r. F. JOHNSON HIGH TENSION ELECTRICAL SWITCHES 4 Sheets-Sheet 2 Filed Oct. 7, 1954 FIG.

INVENTOR TOM LINSON E JOHNSON M 2 M ATTORNEYS Jan. 3, 1956 k T. F. JOHNSON 2,729,710

HIGH TENSION ELECTRICAL SWITCHES Filed Oct. 7, 1954 4 Sheets-Sheet 3 IN VENTOR TOMLINSON F. JOHNSON ATTORNEYS 1956 T. F. JOHNSON 2,729,710

HIGH TENSION ELECTRICAL SWITCHES Filed Oct. 7, 1954 4 Sheets-Sheet 4 F l 6. l3.

.5; .ss/ z 4 g 4 1 x j I (Y/ L- INVENTOR F I TOMLINSON F.JOHN$ONI ATTORNEYS United States Patent() HIGH TENSION ELECTRICAL SWITCHES Tomlinson F. Johnson, Atlanta, Ga.

Application October 7, 1954, Serial No. 460,853

7 Claims. (Cl. 20048) This invention relates to high tension electric switches and has more particular reference to high tension electric switches of the rocking insulator type.

An object of the present invention is to provide, in a high tension electric switch of the type comprising a base member on which is mounted a stationary insulator carrying switch jaws and a rocking insulator carrying a switch blade, a novel and improved bearing assembly for the rocking insulator including an insulator support plate having at least two arms positioned one above the other in spaced and generally parallel relation, the uppermost of which provides a mounting surface for the rocking insulator, the lowermost of which carries journal means rockably mounted in bearings carried by the switch base member.

Another object of the present invention is to provide a novel and improved bearing assembly for the rocking insulator of a high tension electric switch, as characterized above, wherein means are provided for adjusting the rocking insulator angle.

Another object of the present invention is to provide in a group of high tension electrical switches mounted in spaced parallel relation on a common support with each switch including a base member on which is mounted a stationary insulator carrying switch jaws and a rocking insulator carrying a switch blade, novel and improved means for operating the switches simultaneously as a unit comprising a bearing assembly for each of the rocking insulators including an insulator support plate having at least two arms positioned one above the other in spaced and generally parallel relation, the uppermost arm providing a mounting surface for the rocking insulator, the lowermost arm carrying journal means pivotally mounted in bearings carried by the switch base member; and shafting rigidly connecting all of the insulator support plates together so that. all of the rocking insulators will be operated simultaneously as a unit.

Another object of the present invention is to provide novel and improved means for operating the switches of a group of high tension electric switches simultaneously as a unit, as characterized above, wherein each of said insulator support plates is provided with means for adjusting the rocking insulator angle.

A further object of the present invention is to provide novel and improved means for operating the switches of a group of high tension electric switches simultaneously as a unit, as characterized above, which is simple in construction and efficient in operation and one which is relatively inexpensive to manufacture and reduces the overall cost by eliminating extra fittings now normally employed with a group or gang of switches.

Other objects and advantages of the invention will appear in the following specification when considered in connection with the accompanying drawings, wherein:

Fig. l is a side elevation of a switch unit of the rocking insulator type, showing one embodiment of an improved bearing assembly for the rocking insulator, constructed in accordance with the present invention;

2,729,710 Patented Jan. 3, 1956 Fig. 2 is a view similar to that shown in Fig. 1, drawn to a larger scale but with parts broken away and certain parts omitted;

Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 2, with parts broken away;

Fig. 4 is an end elevation of the bearing assembly shown in Fig. 2, but drawn to a larger scale;

Fig. 5 is an end elevation of a modified bearing assembly;

Fig. 6 is a side elevation of the bearing assembly shown in Fig. 5;

Fig. 7 is a vertical sectional view taken on the line 77 of Fig. 6, with parts broken away;

Fig. 8 is a side elevation of another modified bearing assembly;

Fig. 9 is an end elevation of the bearing assembly shown in Fig. 8;

Fig. 10 is a vertical sectional view taken on the line 10-40 of Fig. 8, with parts broken away;

Fig. 11 is a diagrammatic end elevational view illustrating the manner in which a plurality of switch units,

as shown in Fig. 1, are mounted on a common support" and connected by shafting for simultaneous operation as a unit;

Fig. 12 is a view similar to that shown in Fig. 11, but showing a group of switches having bearing assemblies, as shown in Fig. 5;

Fig. 13 is a view similar to that shown in Fig. 11, but showing a group of switches having bearing assemblies, as shown in Fig. 8,.and

Fig. 14 is a view similar to that shown in Fig. 13, but showing a group of switches having bearing assemblies as shown in Fig. 8, with the bearing assemblies connected by an elongated one-piece square shaft.

The present invention provides in a high tension electric switch of the type including a base member on which is mounted a stationary insulator carrying switch jaws and a rocking insulator carrying a switch blade, a novel and improved bearing assembly for the rocking insulator and, in general comprises an insulator support plate having at least two arms positioned one above the other in spaced and generally parallel relation, the uppermost arm providing a mounting surface for the rocking insulator, the lowermost arm carrying journal or trunnion means pivotally mounted in bearings carried by the base member, and means mounted on the insulator plate for adjusting the rocking insulator angle. The present invention also provides, in a group of high tension electric switches, of the type above set forth, mounted on a common'support, novel and improved means for operating the switches simultaneously as a unit including a bearing assembly as above set forth for each switch and shafting rigidly connecting all of the bearing assemblies together so that all of the rocking insulators will be operated simultaneously as a unit.

While the improved bearing assembly of the present invention can be used with high tension electric switches of the type employing a rocking insulator and two stationary insulators, such as shown in my Patent No. 2,333,011, for the purposes of illustration, it will be shown and described as used with a high tension electric switch having a rocking insulator and a single stationary insulator as shown in Fig. 1 of my Patent No. 2,231,809.

Referring now to the drawings, there is shown in Fig. l, a high tension electric switch similar to that shown in Fig. l of my Patent No. 2,231,809, but employing one embodiment of an improved bearing assembly for the rocking insulator constructed in accordance with the present invention. As there shown, the switch unit comprises a stationary insulator 10 fixedly mounted on one end of an ordinary structural channel forming the base member 11 of the switch unit; and a rocking insulator am-acme 12 mpunted on the other end, of the base member ,by means of a bearing assembly, indicated generally at 13. The stationary insulator carries the usual switch jaws and terminal connections, indicated generally at 14", al'nd the :rocking insulator carries the usual switch blade "assembly and terminal connections, indicated generally at The improved bearing assembly, indicated generally at 13, andgas best shown in Figs. 2, 3 'and 4, comprises a pair of bronze upright support members '16, each secured to. one side .of the base member 11 and having a circular bearing 17 formed in its upper end; a shaft '18 in the form of a shortsection of hollowpipe journaled in the bearing 17 and provided with a spaced pairof bronze bearing rings 19 press fitted thereon 'i ne position to form a bearing surface to engage the bronze surface of the bearing; an S-shaped in'sulatorsupp'ort plate 20 positioned between the bearings 17 and rigidly'secured to the shaft'18, a's by means'of 'a spaced pair of depending lugs 21 welded to the plate 20 and the shaft 18;a'jrid a pairlof spacerirings '22, "each loosely mounted on the shaft 18 and positioned between one '-of the bearing mem bers '17ia'n'dthe'adjacentedges of the depending'lugs'21. The insulator support plate '20 is preferably made of an. elongated piece of strap metalbent on itself to the S-shape form, as shown in Fig. 1, to provide an upper arm 23, an intermediate arm 24, and a lower arm 25, positioned one above the other in "a spaced and'generally parallel relation. The upper arm '23 carries the rocking insulator 12, which is suitably secured'th'ereto asby bolting. v,The lower arm 25 carries the depending sup port lugs zLb'ymeans'of which'the 'S-shaped member is secured to the shaft 18. The space between the lower arm 25 and the intermediate arm 24'provides a mountingzs'pace for a short'beamorsh'aft 26, generally rectangular in cross'section, which istightly clamped betwee'nthe two arms as by an elongated spaced pair of bolts which extend. through the two arms, see Fig. 2. Theshaft 26, preferably'and as shown, is made of'wood.

,'The"inner ,free end of the upper arm'23 is adjustably'conne'cted to the inner end ofthe intermediate arm 24, as by means of a spacedpair of bronze bolts 27. The bolts 27 carrying adjusting nuts and a'locking nut, by means of'which the plane of the upper arm'can'be varied about its transverse axis and/or its longitudinal axis, to adjust 'the "rocking insulator angle in two directions.

The. outer end of the lower arm '25 is bent 'dowriwardly,"as shown at 28, to provide a' limiting stop for therocking insulator when swung to open position, andan adjustablebronze nut 29is carried by the channel member 11 toprovide an adjustable stop for the rocking insulator when swung to closedposition.

High tensionelectric switches of the rocking insulator type areusuallyemploye'd as a group or 'gang 'inwhich each of the switch units'are mounted in'spaced parallel relation on a common support'for operation simultaneously. as aiunit.

High tension switch units having bearing assemblies as described above are'particularly adapted to be employed as agroup organg in which each of the'switch units are mounted in spacedparallel relation on a common" support, usually cross arms fixedly secured to the top'ofa pole, for operation simultaneously as'a unit. 7

In Fig. 11, there'is diagrammaticallyillustratedgthe manner in which such a group of switch units is'mounted. As there illustrated, three such switch units"S,"S,j S, are shown as being mounted in spaced parallel relation on cross arms C. When so mounted, the short wooden shafts 26 of the bearing assemblies of the'three switch units are replaced by an elongated generally rectangular in cross sectionshaft '30, preferably'and as shown, made of wood, which'extends through the bearing assemblies and is tightly clamped between the intermediate arrris24 and the lower arm 25 of each of the S-shaped rocking insulator support platesyso that allof the rocking insulators will be operated simultaneously as a unit. The shafts 18 of the bearing assemblies of the two outer switch units are shown as carrying the usual balancing springs B, while the shaft 18 of the bearing assembly of the middle switch unit is shown as carrying the usual operating arm A connected to the usual operating rod R by which the switches are operated. I

The wood beam or shaft 30 can be removed without affecting the adjustment of the switch, thus enabling the switches to be adjusted before shipment. Also, as the shaft 39 is made or wood, lightning is less apt to jump across from one switch to the other, when the-switches are mounted on a wooden structure.

A modified form of bearing assembly is illustrated in Figs. 5, 6 and 7. In this particular modification, the bearing assembly is mounted and positioned on the structural channel base member 11, as is the bearing assembly shown'in Fig. 1, and't'he upright support members 16, with 'their bearings 17, together with the shaft 18 with its spaced bronze bearing rings 19, and the spacer rings 22 are identical inconstruction to the corresponding members a's "showni'n the modification illustrated in Fig. 2. However, in this particular modification, the rocking insul'atorsupp'ort plate *20' is bent to the C-shaped configuration, 'ass'hown in Fig. 6, to-provide an upper arm 31 andfalowerarrn 32. The upper arm 31 carries theroc'king insulator12, which is suitably secured thereto, as by bolting. The'lower arr'n 32 is spaced from and is generally parallel 'to'the upp'er arm 31 and is secured to the shaft 18, asby Welding.

The outer'freeend of the upper arm 31 is adjustably connected to the outer end portion of the lower arm 32, asbymeztns of a 'sp'a'ced pair of bronze'bolts 27. The bolts27'"carryadjustingnuts and alocking nut, by means of which the pl'ane of the upper arm can be varied about its tr'aiisver'se axis and/or its longitudinal axis to adjust the rocking insulator angle in two directions.

Theouter end of the lower arm 32 is bent downwardly as shown at 33,10 provide a limiting stop for the rocking insulatorwhen swungto open position and the usual adjustable bronze'bolt 29 ismounted on the channel memher-11 imposition toengage the curved portion of the insulator" support plate to provide'an adjustable stop for the "rocking insulator when swung to closed position.

'Whenthis particular modification of bearing assembly is 'employed in a singleswitch unit, the ends of the shaft 18'rexten'd beyond the bearings 17 a sufiicient distance to provide 'a' mounting for the'usual balancing springs, as well as for "a conventional operating arm. However, switch unitshaving thisparticular bearing assembly are well adapted'to be employed in a group or gang for simultaneous operation as a unit.

In Fig-12, thereis-diagrammatically illustrated the mantierin which" such a group of switch units is mounted. Asthereillustratedgthreeswitch units '8 are shown as bei'n-gmounted-in spaced parallel relation on cross arms C. The"shafts"'18' of the bearingassemblies' of thethree switchmnitsereconnected-by intermediate shaft sections 34"which' are 'det'ach'ably' connected to the adjacent ends of the shafts 18 by *suitable'fittings,so that the shafts 18"'of"the switch units'and the intermediate-shaft section 34"form acontinuous rigid shaft connecting all of the switch 'unitssoth'at all of the switch units will be operated simultarieously' as ai-unit. Theinterrnediate shaft sections3i4 may bernade of wood or metal, preferably, and as shown,-they"'are"made of wood. The shafts 18 of the bearing "assemblies'of the two outer switch units are shown as carryingthe: usual balancing springs B, while the shaft" 18 'of the middle switch unit is shown as carrying theusual operating arm 'A connected to the'usual operating rod' R"by which the switches are operated.

"'Another'modifiedform c? bearing assembly is illustratedinFigs. 8, 9 and 10. In this-particular modification, the'bearing assembly is mounted and positioned on the "structural channel "base memberllgas is the 'bea'ring assembly shown in Fig. 2, and the'upright support members 16, with their bearings 17, are identical in construction to the corresponding members as shown in the modification illustrated in Fig. 2. Also, the rocking insulator support plate 20" is similar to the support plate 20' shown in Fig. 6, and is of a O-shape form to provide an upper arm 31' and a lower arm 32'. The lower arm 32' is spaced from and is generally parallel to the upper arm 31' and is secured, as by welding, to two separate spaced-apart trunnion or journal members 35 in the form of short hollow pipe sections, each journaled in one of the bearings 17. Each of the trunnion or pipe sections 35 has a bronze bearing ring 36 press fitted therein in position to form a bearing surface to engage the bronze surface of the bearing 17.

A short shaft 37 in the form of a hollow pipe of rectangular cross section extends through the pipe sections 35 and projects beyond the bearings 17 a sufiicient distance to provide a mounting for the usual balancing springs, as well as for a conventional operating arm.

The shaft 37 is detachably secured to the lower arm 32 of the insulator support plate 20", as by means of a clamping spacer plate 38 engaging the bottom surface of the arm 32' and one side of the shaft 37, and a clamping plate 39 engaging the opposite side of the shaft 37. These clamping plates are tightly clamped on the square shaft 37 by a pair of clamping bolts 40, one on each side of the pipe 37 and extending through the clamping plates, the lower arm 32' and a reinforcing plate 41 mounted on the upper surface of the arm 32 and secured thereon as by a bolt 42. This construction permits the shaft 37 to be removed and/ or replaced without affecting the adjustment of the switch.

The outer free end of the upper arm 31' is adjustably connected to the outer end portion of the lower arm 32, as by means of a spaced pair of bronze bolts 27". The bolts 27" carry adjusting nuts and a locking nut, by means of which the plane of the upper arm can be varied about its transverse axis and/or longitudinal axis to adjust the rocking insulator angle in two directions.

The outer end of the lower arm 32' is bent downwardly, as shown at 33", to provide a limiting stop for the rocking insulator when swung to open position and the usual adjustable bronze bolt 29 is mounted on the channel member 11 in position to engage the curved portion of the insulator support plate to provide an adjustable stop for the, rocking insulator when swung to closed position.

When this particular modification of bearing assembly is employed in a single switch unit, the ends of the square shaft 37 extend beyond the bearings 17 a sufiicient dis tance to provide a mounting for the usual balancing springs, as well as for a conventional operating arm. However, switch units having this type of bearing assembly are particularly adapted to be employed as a group or gang for simultaneous operation as a unit.

In Fig. 13, there is diagrammatically illustrated one manner in which such a groupof switch units is mounted for operation as a unit. As there illustrated, three such switch units S are shown as being mounted in spaced parallel relation on cross arms C. The short square in cross section shafts 37 of the bearing assemblies are replaced by an elongated square in cross section shaft 43 which extends through the bearing assemblies and is tightly clamped to the lower arm 32 of each of the bearing assemblies, so that all of the rocking insulators will be operated simultaneously as a unit. The shaft 43 is shown as carrying a pair of balancing springs B, each mounted on the shaft adjacent one of the outer switch units and an operating arm A mounted on the shaft adjacent the middle switch unit and connected to the usual operating rod R. The shaft 43 can be removed without affecting the adjustment of the switches, thus enabling the switches to be adjusted before shipment.

Under certain conditions, when switches of this type are mounted as a gang or group, itmay be preferable to employ intermediate shaft sections made of wood connected to the adjacent ends of the shafts 37 of adjacent switches by suitable fittings so that the shafts 37 of the switches and the intermediate shaft section form a continuous rigid shaft connecting all of the switches for simultaneous operation, as diagrammatically illustrated in Fig. 14. As there illustrated, three switch units S" are shown as being mounted in spaced parallel relation on cross arms C. The square in cross section shafts 37 of the bearing assemblies of the three switches are connected by intermediate wooden shaft sections 44 which are detachably connected to the adjacent ends of the shafts 37 by suitable fittings so that the shafts 37 of the switch units and the intermediate wooden shaft sections 44' form a continuous rigid shaft connecting all of the switch units so that all the switch units will be operated simultaneously as a unit. The shafts 37 of the bearing assemblies of the two outer switch units are shown as carrying the usual balancing springs B, while the shaft 37 of the middle switch is shown as carrying the usual operating arm A connected to the usual operating rod R by which the switches are operated.

From the foregoing description, it readily will be apparent that there has been provided in a high tension electrical switch of the rocking insulator type, a novel and improved bearing assembly for mounting the rocking insulator, which is simple in construction, inexpensive to manufacture, efiicient in operation, extremely fiexia ble in its adaptations, and provides means for adjusting the rocking insulator angle in two directions.

Furthermore, there has been provided in a group of high tension electric switches of the rocking insulator type, mounted in spaced parallel relation on a common support, novel and improved means for operating the switches simultaneously as a unit, which means also is simple in construction, efiicient in its operation, extremely flexible in its adaptations, and greatly reduces the overall cost by eliminating extra fittings now normally employed with a group or gang of switches.

Obviously, the invention is not restricted to the various modifications herein illustrated and described.

What is claimed is:

1. In a group of high tension electric switches mounted in spaced parallel relation on a common support with each switch including a stationary insulator carrying switch jaws and a rocking insulator carrying a switch blade mounted on a base member, the combination with the rocking insulators of means for operating them as a unit, whereby all of said switches will simultaneously be opened or closed, said means comprising a bearing assembly for each rocking insulator including a pair of upright support members mounted on opposite sides of the switch base member and having ring shaped bearings formed in their upper ends, a shaft extending through and journaled in said bearings, an insulator support plate having an S-shaped configuration to provide three arms positioned one above the other in spaced and generally parallel relation, the uppermost of said arms providing a mounting surface for the rocking insulator, the lowermost of said arms being rigidly attached to said shaft intermediate said bearings, and adjusting means mounted on said support plate for varying the plane of said uppermost arm to thereby adjust the rocking insulator angle in tWo directions; and an elongated shaft rigidly connecting all of the bearing assemblies together, said elongated shaft being received in the space between the lowermost and intermediate arms of each of the insulator support plates and detachably clamped therein, whereby all of the rocking insulators will be operated simultaneously as a unit.

2. In a group of high tension electric switches mounted in spaced parallel relation on a common support with each switch including a base member on which is mounted a stationary insulator carrying switch jaws and a rocking insulator carrying a switch blade, the combination spasms rocking iiciuldthisbf means for operating them "whereby all 'of saidswi'tche's will besimtiita- 1d ior closetl, said mealns comprising a bear- I, y for eacnrocking"insulator includin'g'a'pair of up'right 'supp'ortkneiiibers mounted on opposite sides oftlie switch b'ase"iiiemberand having ring shaped bearings'rennes in'theirltipp'er' ends, a shaft'extending through 'and'journa'ledin said bearings,an insulator support plate havinga" shapedconfiguration to provide two arms positi on'ed 'one'above theother in a spaced and generally parallel relation, the upper of said arms providing a mounting surface for the rocking insulator, the lower of s'aidarms "being fixedlyattached to said shaft intermediatesaidbearings, andadjustingmeans mounted on said insulator support plate for varying the plane of saidupper arm totherebyadjust the rocking insulator angle in two directions; and intermediate shaft sections detachably connected "to thea'djac'ent ends of the shafts extending throughthe bearings of'each switch to form a continuous rigid shaft'co'nnectin'g"allof the bearing assemblies together so'th'atallof the rocking-insulators will be operated simultaneously asa unit.

3. Ina group'of'hightension electric switches mounted in'spaced parallel relation on a common support with each switch including a base member on which is mounted a stationary insulator'carrying switch-jaws and a rocking insulator carrying a switch blade, the combination with the rocking insulators of means for operating them as'a unit, whereby allof'said switches will simultaneously be opened orclosed, said means comprising a bearing assembly for each rocking insulator including a'pairof upright support members mounted on opposite sides of the switch base member and having ring shaped bearings formed-in their upper ends, an'insulator support plate having a C-shaped configuration to provide twoarms positioned oneabove the other in a spaced apart and generally'parallel'relation, the upper of said arms providing amounting surface for the rocking insulator, the lower of said 'armshavin'g apair'of spaced-apart transversely extending axially aligned hollow pipe sections fixedlyattache'dtoits bottom surface with the outer free ends of each of said pipe sections 'journaled in-one of said bearings, a short shaft, generally rectangular in cross section extending through said sections of holiow pipe, clamping means carried by said lower arm and positioned betweensaid short pipe sections for rigidly clumping said'square shaftto said lower arm, and adjusting means'mounted on said insulator support plate for varying theplaneof said upper arm to thereby adjust the rocking insulator in two directions; and intermediate shaft sections'detachably connected to the adjacent'ends of the 'square'shafts extending through the'hollow'pipe sections of ithe be'arings'of each switch to form a continuous rigidshaft connecting all of the bearing assemblies -togeth'erso'that all of the rocking insulators will be operated simultaneously asa unit. v

'4. In a group of high tension electric switches mounted in'spaced parallel relation on a common support with each switch including a'base member on which is mounted a stationary insulator carrying switch jaws and 'a rocking insulator carrying a switch blade, the combination with the 'rocking'insulatorsof means for operating them as a unit, whereby all of said switches will simultaneously be opened or closed, said'm'e'ans comprising abearing assembly for a'ch'roc'k'in'g' insulator'i'ncluding a pair of upright support r'r'iembers'mounted "on oppos'ite'sides of the switchbase member and having ring shaped bearings formed in their upper ends, an insulator support plate having a C-shaped configuration to'p'rovide two arms positioned one above the other in a spaced apart and generally parallel relation, the upper of'said arms providing a mounting surface for the rocking in'sulator, the lower of said arms having a pair of spaced-apart transversely extending axially'aligned hollow pipe sections"fixedlyattached to its bottomsurfac'e w'i'tli the deter 'fi-eeends cream of said pipe seetiensjonrv ai'd b'el'ari'figs,and adiustingmeansmountefl 'fs'aid insulator stippdrt' pl'ate "forvaryin'g the plane- 'of said upper-arm to "thereby adjust' therocking insulator in two tii're'ct'itins; aneloi igated shaft, rectangular in cross seetiomeir'teiiding through the'hollow pipe sectionso f'all of said'bearing assemblies; "and blarnp'in'g means carried by the HoWe'rarm of "each of said bearing assemblie'send p' itiond between' the"short pipe sections thereof for rigidly and detachably "clamping said square shaft to the lower "a'rrn, whereby all of the rocking insulators will be operated simultaneously as a unit.

5. In a'high'ten's'ionele'ctric switch ofthe type wherein astationary'insulatorcartyingswitch'jaws and a rocking insulator carrying'a'switch blade are mounted in spaced relation on a common-elongated'b'ase member; the'combinatio'n'wi'th'said'rockiriginsiilator of abe'aring assembly for pivotallymoilnfing the rocking insulator on saidbase member,-said bearin'g'as'se'mbly' comprising a 'pair of'upngmsu pon members mounted on opposite sides of said base member andha'vi'ng ring s'haped bearings formed in their upper ends", a sha ft e'xtendingthrough and j'ournaled in said bearings; an insu'latorsupport plate having an S-shaped configurationito'provide three arms'positioned one above theother in spaced and generally parallel relation, the uppermost of said arms providing a mounting surface for the rocking insulator, the lowermost of said arms being rigidly connected to said shaft intermediate said bearings;adjustingmeans mounted onsaid insulator support plate -lor varying theplane of said uppermost armto thereby adjust the rocking insulator angle in two directionspanda reinforcing wooden block generally rectangular in cross section extending transversely oi -said insulator supporL-plateand clamped between the-intermediate and lowermost of 'saidarms.

-6. In-a higlrtension-electric switch of the type wherein a stationarydnsulator carrying switch jaws and a rocking insulatorcarrying'a switch blade'are mountedin spaced relation on -a commonelongated base member; the combination with said rocking insulator of a bearing assembly fonpivotally mounting the rocking'insulator on said-base member, saidbearing'zassemblycomprising arpair of upright support mer'nbers mounted-on opposite-sides of-said base member andhaving ring shaped bearings formed in their upper ends; a shaft extending through and journaled in said'be'arings; an insulator support plate having "a C shaped configuration to provi'de two armspositioned one above the other in'a spaced'and generally parallel relation, the=11pper or said arms 1 providing amounting surface for the rocking insulator, the lower of said arms being fixedly attached to said shaft intermediate said bearings; and adjusting i means mounted on said insulator support, plate forvarying the plane -of said upper armto'thereby adjust the rocking insulator an le in two directions.

7. in a hig-h 'tensio'nelctric switchof-"the type wherein 'a sta'tio'naiy Sui-stews ryingswitchiaws and a rocking 'ii'ist'ilator carrying a 5 switch bladeare mounted in spaced relation 'on a 'eommon longated base member;"the combination ".vith's'aid"rockinginsulator of a bearing assembly tori 'piv'enn mounting the rocking insulator on said base memben said bearing assembly comprising a-'pair-' of upright support members mounted on opposite sidesof sai'd base'me'rrlber and having ringshaped bearings formed theirfnp'per ends; an inseam support'plate having-a C-s'ha'ped configuration 1 to provide two arms 'position'e d one sis-evens other in s space d' 'a'part andgenerally paral- =lelrelation; the upper of said' arm's" providing a mounting surfacefor tlie roaring-insulator, the lower or said arms having a pair of spaced-apart transversely extending axially aiigsew 'h'oll'ow p'ipes'ections fixedly attached to its bottom -siirfae' with the outer free ends of eachof said pipe sections jdurnal'edin one'of said bearings;-a short shai't, generally rectangular 1 in I cross section extending through-said sections ofhollow pipe; clamping means car- 'r'ied"by sairhflowefiarm"andpositioned betweensaid sliort pipe sections for rigidly clamping said square shaft to said lower arm; and adjusting means mounted on said insulator support plate for varying the plane of said upper arm to thereby adjust the rocking insulator in two directions.

References Cited in the file of this patent UNITED STATES PATENTS

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