Патент USA US2123631код для вставки
July 12, 193s. ' C. H. KQEHLER ' 2,123,631 ELECTRICAL'CONNECTER Filed July s, 1955 ' 3 sheets-sheet 1 ¿Wiz/"M @s July v12, 193s. c. H. KoEHLER ELECTRICAL(r CONNECTER med July e, 1955 2,123,631 3 Sheets-Sheet 2 04%@ ` July 12, 1938. Q_ |-|_ KOÈHLER 2,123,631 ELECTRICAL ' CONNECTER Filed July 8, 19.35 /52 /// ///,//// ./. ,. k 3 Sheets-Sheet 3 _2,123,631 Patented July 12, -1938 UNITED STATES PATENT oFFlcE 2,123,331 ELECTRICAL CONNECTER Charles H. Kuehler', Chicago, 1u. Application July s, 1935, serial N0.'3o,zs3 ' 14 Claims. (C1. 173-328) such use and produces a high-grade efficient con This invention relates to electrical connecters, and more particularly is directed to connecters providing a positive electrical connection between two spaced contact terminals, and capable of 5 maintaining an equalized contacting pressure at both contact terminals regardless of slight mis alignment of _ the terminals. tact device. Also, because of its self-aligning ~ characteristics, the present invention is capable of being employed in connection with the ter minals of circuit breakers, if desired, since the 5 sockets or terminals of such"v breakers must be self-adjusting and capable of maintaining equal - In my copending application, Serial No. 724,118, ized contact pressure upon the male contact plugs ñled Mayfä, 1934, now Reissue Patent No. 20,608, with which the breaker terminals are engaged when the breaker is connected in switch-closed 10 10 dated December28, 1937, I have disclosed a plug and receptacle connecter lparticularly adapted _ position. It is to be understood, however, that for connecting and disconnecting an electrical the invention is `not to be limited to these spe circuit, havingy a `plurality ofv contact shoes ciñc uses, since the'broad features thereof are applicable in various other iields. mounted for universal movement about a ter Other objects and advantages of the present 15 minal stud and adaptedto engage about a con tact stud carri`ed\,byÁ amovable closure member. invention Vwill appear more fully from the fol lowing detailed description which, taken in con The present invention; in Vits preferred em junction with the accompanying drawings, will disclose to those skilled in the art the particular bodiment, is directed tov af'similar connecter mounted on a ñxed terminal stud which is con nected to a second spaced contact terminal by means of an extending connecter having substan , tially floating engagement therebetween. This accommodates any slight misalig'nment between the terminals. Engagingeach of ’the terminals is a plurality' of contact shoes having substan tlally universal movement about .the termina‘ls and normally urged .under spring pressure against the terminals' andalso >against the connecter. An object of the present invention is to pro 3f) vide a connecter fory electrically connecting two spaced s contact'. terminals,` which connecter has relative ñoating engagement between .the ter~ minals to accommodate slight ,- misalignment construction and operation of a preferred form 20 of the present invention. - ` In the drawings: ` Figure v1 fs an elevational view, partly in sec tion, of an electrical connecter embodying the’ l present invention; ' ‘ - . 25 i _ Figure’Z is an enlarged plan view of one of the Vterminal contact devices, taken substantially on line 2--2 of Figure 1; , » , Figure 3 is a plan' view of a modiñed form of contact structure; ' 30 ` ` Figure 4 is a view, on a smaller scale, taken through the structureV shown< in Figure 3, with the connecter inserted; ' , ' ` _ Y `Figure 5 is a vertical sectional view through therebetween, -v » ¢ ` lAnother object o_f the. present invention 'is 4to a modifiedform of connecter; fj' ' Figure 6 is a plan viewI of amodiñed assembly maintain equal Ácontactpressure between the ter- ~ minals and the contact shoes, and ebetween* the >of Contact shoes; shoes and the-connecter. yThis :equalization of pressure obtainedby Áthe provisiony ofçxa yfull. ñoating housing enclosing the shoes and biasing the outer-ends ofthe springs associatedywith each of the shoes, or by the provisionI of aninter ~ mediate spider'member having, arms upon which the shoes are mounted 4for substantially universal spring-controlledgmovement. ' " . ,y , Another object Vof "th‘e present invention is the Figure 7 is‘a‘xsectional view through‘fa-still further modified type of~connecter; ‘ ‘ . Figure 8 `is -a vvertical sectional view through `4,0 a telescoping type ofy connecter` embodying rthe principles of the present invention; Figure 9 is a sectional viewstaken on Figure 10 is a sectional View taken substantially 45 on Yline Ill-I0 of Figure 8; and \ y MFigures 11 and 12 are sectional views of modi elimination of spring means from any 'part'of the electrical circuit- through the'contact" te# y'fled types of contacts.>r terially increased. provided a pair of spaced terminal supporting 50 minals, -whereby theliíe‘ of thel springs'is ma- , ^ Considering now Figure 1 in detail, I have connecter for connecting and disconnecting two members 5 and 6, which membersare in the 'form of brackets having normally extending por present invention ñnds particular application for connected ' In the Aprovision >of a disconnecting device or spaced terminals, spacial requirements usually ` tions adapted to be disposed in substantial ver demand a compact but sturdy construction. The tical alignment. The brackets 5 and 6 may be through any suitable connecting 55 2 2,123,631 ' means to a source of current supply. Each of the brackets 5 and 6 has extending therethrough a contact terminal, indicated respectively at 1 tion 26, which contacting portion is adapted to have equalized pressure contact upon the lateral surface of a connecting rod 21, which rod is and 8. The contact terminals are held in ñxed formed of a suitable metal member having a position by means of flanged collar portions en > relatively high degree of conductivity, such as gaging one surface of the bracket arms 5 and 6 copper or the like, the rod'21 being of sufficient and having threaded nut members, such as the length to have its head portion thereof, indicated hexagonal nut members 9, threaded over the ex at 28, comprising a substantially spherically tending portions of the studs 1 and 8. formed head portion guided by the inclined sur 10 Each of the studs 1 and 8 is provided with an faces I6 of the shoes I4 into the substantially cy 10 enlarged rounded head portion I0 and I2, respec lindrical opening defined within the inner sur-` tively, which head portions are joined to the faces of the shoe members Il to provide for con flange portion of the stud by means of a reduced ‘ neck portion. tact between the shoes 20 and the shoes I4. The connecting member or rod 21, at its upper end, is mounted within a suitable insulating han 15 ture indicated generally at I3, comprising a plu die member 29, or may be carried by any other rality of contact shoes I4, preferably six in num suitable operating mechanism for projecting it ber in the illustrated embodiment of the inven through the stud 8, which stud is provided with tion, although it is to be understood that any a cylindrical axially extending opening 30 adapt 20 desired number of contact shoes may be provided. ed to receive the rod 21, and throughv the cylin These shoes are internally recessed atl one end, drical opening formed in the contact shoes 20 20 as shown at I5, to engage about the head portion downwardly into engagement within the opening of the stud 1, whereby substantially ball and formed by the shoes I 4. It will be noted that the socket engagement of the shoe members I4 about rod 21 has relative telescoping engagement with 25 the head portion I0 of the s_tud 'I is provided. respect to the stud member 8, and the contact At their opposite ends, the shoes Ilare pro- ' between the stud member 8 and the rod 21 is pro vided `with inwardly extending tapered surfaces vided by the engagement of the inwardly extend I6, defining an inwardly tapering circular open ing portions 26 of the contact shoes 28 with the ing for receiving a connecting member. y The ex lateral surface of the rod. This provides a wiping 30 ternallateral surfaces of the shoe members are contact of these portions of -the shoe members w . . provided with recesses. I1 as shown in Figure 1, along the surface of the rod, whereby clean and which recesses are tapered to receive the small positive pressure contact of the shoe members ends of helically coiled spring members I 8, which with the rod is provided. ' spring members, at their inner ends, bea-r against ‘ Since the shoe members 20,- at their opposite 35 the shoe members I I to urge the same into equal ized contact pressure about the head portion I8 ends, have pressure contacting engagement with se of the stud 1, and at their outer ends are biased the head end I2 of the stud, which is connected against the defining walls of an enclosing housing to the _contact` supporting bracket 6, it is appar member I9 which is preferably polygonal in shape, ~ ent that the rod 21 is in proper equalized pressure contact with the bracket 6 _so that‘current may 40 having as many sides as there are shoe members _ transmitted from the bracket 6 through' the in the present embodiment of the invention, be ‘ being in the form of an hexagonal tube extending rod 21 with a minimum of resistance. It will be noted that the upper end of the stud axially ofthe stud member 1. This member I9 8 is with an outwardly flaring opening may be formed of insulating material Aif desired. 32 soprovided that the head end 28 of the rod 21 may be. Thus a full-floating self-aligning contact re 45 ceiving structure I3 is provided about the head. readily guided into the interior of the stud m‘em 45 15 The stud 1 is provided with a contacting struc , portion ~I-Il of thestud, which has substantial- uni ber 8 for telescoping movement therethroughA 4when it is-~desiredlto connect the contact brackets. versa] movement about the stud 1. By reason „5 and 6. of the springs I8, each of the shoe members has Normally, when the rod has not been connected substantially uniform contacting pressure with 50. the stud whereby equalized contact pressure of in position, the springs I8 bearing against tire the structure I8 with the lateral surface oi’ the tubular sleeve member I 9 will urge the upper ends of the shoe -members I4 inwardly, and when the stud 1 is provided. head end 28 of the rod is guided into the open The head rportion I2 of the stud member 8 has end of these shoe members along the tapered 55 engaged. therewith a plurality `of contact shoes . surfaces Il, the shoe members are spread out 28. which shoes have recessed portions at one wardly against the pressure of the springs I8 55 end thereof, -as shownat' 2_2, adapted to have whereby an equalized pressure contact of each of beating» engagement about the rounded stud I2, - whereby the shoes are supported for substantially the shoes upon the head endl! ofthe rod is lâzi‘ver’lllfconjoint movement' about the stud head -` 28, in theiriaister-smfaces, are 're providedgç ' - ~ _ `. . ` It is _thus apparent vthat I have À provided `an electrical connecter whereby the _ _ ' rod ceos'ed'fas 'shown at 23 tofprovide suitable> seating » 21 may_,be,._¿telescoped 'with respect’to one con , 4.portions-for helically coiledsprings ‘24,'which 65 springs, at their outer ends. are biased against an enclosing tubular polygonally shaped member 2l corresponding to the member I8 of Figure 2. 'I'he shoes are thus resiliently maintained in pres . sure contact about the head y portion I2 of the m70 stud 8, and are supported for floating movement thereabout due to the fact that the sleeve member tact studïand g/uided into >electrical contact en gagement .witha second spaced contact stud, the two contact studs having contact devices where-l by the rod is supported substantially for float ing movement between the two contacts, thus accommodating- for any misalignmentÀ between the contacts and providing an equalized contact pressure about each ofthe contacts and about 70 25 does not extend up to the flange of the stud I the surface of the rod at each of _the contacts and therefore floats about the head I2 with the>> regardless of variations in the alignment between -shoe members. Each of the shoes 20 is also pro these contacts. 'I'he opening 30l in the stud 8 75 vided with an inwardly extending contacting por accommodates slight cooking of the rod 21 there 75 2,123,681 in when the studs 1 and 8 are not in exact align ment. ' In the embodiment of the invention shown in Figures 3 and 4, the contact bracket 5’ has a con tact stud 1’ mounted thereon by means of the nut 9’ threaded over the extending portion of the stud, the head portion i0’ of the stud being adaptedto receive a plurality of .contact shoes 35 having recessed portions 36 at `their lower 10 ends adapted to engage about the head portion I0' of the contact stud 1’ whereby substantially universal movement of the shoes with respect to the stud is provided. ’ , Thev shoes 35, at their upper ends, are pro 15 vided with outwardly flaring tapered surfaces 31 for guiding the end 28 ofA a contact rod or connecting rod 21 into engagement within the circular opening formed by the respective sur faces of the shoes. Intermediate the head por 20 tion l0' of the stud and the position which the head portion 28 of the rod 21 assumes with re spect to the shoes 35, there is provided a spider member 38 having a plurality of radially ex tending arms 39. The arms are adapted to ex 25 tend through enlarged openings formed in the shoes 35, and project outwardly of the external periphery of the shoe members to the tapered openings 40 formed in the shoe members. At their outer ends, the arms 39 are adapted to 30 carry suitable cap members 42, which cap mem bers provide for biasing the outer ends of the helically coiled spring members 43 against dis placement outwardly of the ends of the arms 39, while the springs 43 are biased at their in ner ends against the base of the tapered open ings 40. The shoes _are thus mounted for uni versal movement about the stud-member 1', and are held in their respective cooperating positions , by means of the spring members 43 mounted 40 about the arms 39 of the spider 38. In this manner the shoes may move outward 3 indicated at 59, adapted to engage the head end "66- of a .terminal stud' member 62 secured in any suitable manner to a supporting bracket 63. A suitable garter spring 64 engages the free ends of the- spring fingers 58 for.urging them into tight uniform pressure contact with the head end 60 of the terminal 62.. The opposite end of the contact socket member 56 is adapted to receive the ball tip end 65 of a connecter rod 66 corresponding tothe connecter rod 21 of Fig» 10 ure 1, and the `spring fingers are inwardly rounded, as at 61, to receive a circularly coiled garter spring 69 for urging the fingers radially inwardly to provide a uniform pressure contact of each of the spring fingers 51 about the lateral surface of the ball tip 65. In this manner a selfáaligning contact assembly is provided in which uniform contacting pressure is produced between each of the contact fingers andthe con ,tact terminal and contact rod. In Figurek 5 I have disclosed a modified form of connection, in which only two points of con tact are required to effect electrical connection between a pair of spaced contacts. Referring in detail to the structure shown in 25 Figure 5, I provide a fixed contact Cmember 10, having a normally extending arm 12 supported upon a suitable supporting bracket 13. The con tact member 16 is provided with a ball tip end 14, and is also provided with a longitudinally ex 30 tending central passageway 15 receiving the in ternally threaded sleeve 16 which is mounted therein and which has an extending end portion projecting below the contact 10 and having a bevel gear member 11 keyed thereto. The gear 35 11 ,is driven by a second gear member 16 sup ported on a driving shaft 19. The threaded shaft 16 is adapted to receive an externally threaded shaft 80 which is recipro cated within the passageway 15 by rotation of the 40 shaft 16, the shaft 89 having a suitable stop mem ber 82 for limiting its downward movement with in the passageway 15. The stop 62 slides in a suitable keyway 83 formed in the passageway 15 to prevent rotation of the shaft 86 and to pro vide for only longitudinal movement thereof. ly to accommodate the admission of the head end 28 of the connecting rod 21, and an equalized pressure of each of the shoe members against the surface of the rod and against the surface of the head portion I0' of the stud is provided. The upper end of shaft 80 has a socket 86’ re It is obvious that the maintenanceof equal ized pressure and the'provision of a positive, high ceiving the ball end 8|' of a pin 8l mounted 'for grade, eiiicient contact structure is provided with universal movement about the upper end of shaft 50 either the construction shown in Figures 1 and 2, 8U. 50 At its upper end, the pin 8l is provided with where an enclosing polygonally shaped housing is provided, or by the provision of a spider such a spider member 84 having radially extending arms 85 passing through suitable openings formed as shown in Figures 3 and 4.' In Figure 6 I have shown a further modified in a plurality of contact shoe members or bars R.. form of contact assembly, in which a plurality 86,.,the outer lateral surface of the contact bars of contact shoes 50 form a circular opening 62 - 86 being provided with tapered recesses ill re ceiving the helically coiled spring members 68 into which a contact connecting member is adapt ed to extend, and are held in position by means carried by the arms 85 and biased at 'their outer ends against a stop plate 89 secured to the .outer y of a coiled garter spring 53 engaged in a suit ends of the arms. This provides for resilient able groove 54 formed in the outer lateral periph 60 ery of the shoes 56. The shoes are provided, movement ofthe contact bars 86 inwardly and at one end, with the inclined> tapered surface outwardly with respect to the spider 64, and also 55 for guiding a connecting rod into the socket provides for resilient and uniform contact pres defined by the shoes. The garter spring 53 is sure of the bars against the ball tip end 90 of a contact member 92 fixed at a predetermined dis 65 65 adapted to constantly urge the shoes toward each tance from the contact 10. other, and radially inwardly toward the contact The lower ends of the contact bars 66 are also> ' member, whereby equalized pressure of each of provided with tapered recesses 93 formed in the the shoes against the contact member is pro outer ‘lateral surface thereof, which recesses are vided.' adapted to receive helically -coiled springs 94 70 The structure shown in Figure '7 comprises a 70 normally biasing the lower ends oi’ the contact 'resilient metal socket member 56, which is pro vided at its opposite ends with slotted portions - bars into contact engagement 'with- thelball tip4 providing a plurality of spring fingers 51 and 14 of the contact 10. The springs are'maintained in proper biasing position by an enclosing hous 56, respectivelyr The spring fingers 5,8 are'pro al. vided with an enlarged arcuately curved portion ing member 95 having suitably inset portions 96 4 2,123,631 forming spring seats for the springs-94. In this for the lower end |09 4of a threaded shaft ||0, manner the lower ends of the contact bars 86 are which shaft at its-lower end is provided with a biased inwardly into uniform contact engage lhelical gear ||2 having bearing within a suit ment with the lateral surface of the ball tip 14. able supporting bracket member ||3. Suitable Preferably, the inner contacting surfaces of the thrust washers ||4 are provided at opposite ends 5 contact bars 86 and the ball tips 'I4 and 90 of the of the gear |I2, and the gear is adapted to be > contacts 'l0 and 92 are silverplated in order to rotated by a second helical gear ||5 carried reduce the resistance to passage of current there within suitable bushings ||6 extending into op through. 10 ` _ posite ends of a' cylindrical'recess formed in the In the operation of the structure shown in member ||3. Suitable graphite or other bearing 10 Figure 5, in the position shown in this ñgure the members ||'| are interposed between the ends contact bars 86 have been moved upwardly to of the gear | |5 and- th'e bushings || 6, the bush provide for contacting engagement between the ings ||6 being bolted into position by means of contacts 10 and 92. When it is desired to dis the stud bolts ||8 threading into the lateral connect the ’electrical connection between4 these walls of the bracket ||3. f contacts, the shaft 19 is rotated by any suitable The bracket ||3 is also provided with oppositely driving means to effect corresponding rotation’ `extending flanged shoulders | I9,l which shoulders of the sleeve 16. This results in threading of the are adapted to receive suitable stud members |20 externally threaded shaft 80 downwardly within securing the bracket ||3 to the portion |04 of the passageway 15, and results in corresponding the member |03. It will be noted that the bracket movement of the contact bars 86 due to their en ||_3 may be rotated through a limited arc with gagement by the arms 85 of the spider 84 secured respect to the member |04 in order to accommo on the sleeve member, away from the ball tip 90, ’ date any slight misalignment between the mein-l . . disconnecting the contact 10 therefrom. At the ber |04 and the shaft |22 which carries the gear same time, the lower ends of the contact bars ||5. ` `are moved downwardly past the ball -tip 14 of The .shaft |22 extends outwardly of the bush the contact '|0 until the contact bars 86 assume ings | I6 and is provided with squaredend por a position with the spider 84 disposed imme--- tions |23, one~of the end portions |23 receiving' diately above the ball contact tip 'I4 of the con . a crank member |24 whereby the shaft |22 may 30 tact 10, with thelower ends of the contact bars be rotated in. opposite directions to produce cor 86 being disposed about the lower cylindrical responding rotation of the threaded shaft ||0. portion of the contact 10. ' 'I'he upper end of the Itubular member | 05 is' This provides a suitable clearance between the provided with a rounded external bead |25, which ‘ contacts 92 and 10, and at the same time pro bead is adapted to form a suitable contact sur , .duces wiping engagement of the inner surfaces face engaged by a plurality of contact shoes |26 of the contact bars 86 across the ball contact' having arcuate inner surfaces engaging about the tip 14, and also across the ball contact tip 90 when bead |25 at the lower end thereof. The contact the bars are moved ‘upwardly into contact en-v gaging position. This is extremely advantageous 40 in providing a clean and positive contact between the ball contact tips and the contact bars, thus reducing the resistance through the connection. At the same time, the spring mounting -of the contact bars 86 at their upper and lower ends assures that uniform contact pressure of each " of the bars upon the lateral surface of the ball -contact tips '14 and 90 will be secured. Obviously, the reciprocatory movement of the contact bars 86 might be secured by other means thanv the externally threaded shaft fitting in_to Ul Cl the threaded sleeve 16, and I do not intend to limit my invention to this specific form of actu ating mechanism, since a suitable plunger mem ber might be employed for producing the same mode _of operation. Further, even if a slight mis alignment of the contacts 92 and 1.0 is present, the resilient mounting of the contact bars 86 upon the sleeve 80 insures that such misalign ment will be accommodated, and that no un shoes |26 are also provided with concave recesses -|21 for clearing the bead |25 -when the shoesv are lowered. A plurality of spring members of 40 arcuate cross-section, indicated at | 28, are adapt ed to engage in suitably notched portions of the external surface of the members |26, being held in position by means of a polygonal band |29 surrounding the shoes and connected with the springs |28 by means of the adjustable threaded pin members |30 which have suitable seating en gagement in the arched portions of the spring |28. This servos to urge the shoes |26 resiliently into engagement -with the upper end of the tubu lar member |05 and to >maintain equalized pres sure between the shoes and the contact surface of the member | 05. The threaded shaft> ||0 is provided with a spherical traveling nut |32 adapted to move up wardly and downwardly on the shaft ||0 by reason of the pin |33 guided in the keyway |34 formed in the internal surface of the member | 05, whereby the nut |32 is prevented from ro 60 even contact pressure Will be produced thereby. tation and threads upwardly and downwardly the invention shown in Figures 8, 9 and 10, a contact stud |00 is provided with an extending threaded portion |02 receiving a support member upon the shaft || 0 as the shaft is rotated. » A suitable supporting sleeve |35 is providedat its lower end with a ball socket portion |36 welded or otherwise suitably secured thereto which en Considering now„ in detail, the embodiment of |03 threaded thereover and having a laterally extending portion |04 which receives a hollow metallic tube |05 threaded into a recess formed in the portion |04 of the member |03. Within the lower end of the tube y|05 there is 7 gages about the spherical surface of the traveling nut |32 to provide for substantially universal movement of the sleeve |35 about the member | 32. The socket portion | 36 of the member |35 is suitably milled out as shown at |31 about the provideda bushing |06 which has an annular pin |33 to provide for this universal movement shoulder |01.seating on the bottom of the recess _ of the sleeve |35 about the traveling nut. into which the tube |05 extends. The bushing The upper end of the sleeve |35 is provided |06 also has an extending cylindrical portion |08 with an annular disc-like member or spider |40 whichextends into a suitable recess formed in having a plurality of radially extending slots the member |04. the bushing serving as a guide " milled into the outer surface thereof, which slots 2,123,631 » are adapted to receive radially extending blade 0r cam members |42, the members |42 extend ing radially‘outwardly of the spider |40 and be ing suitably welded or otherwise secured in- the milled out slots formed in the outer surface of the disc | 40. The upper ends of the shoe mem bersl |26 are slotted, as indicated at |43, from the end longitudinally to a point below the extend ing arms |42 of the spider |40. Suitable leaf spring members |44 are mounted in vertically extending position on the external surface of the shoes |26 by means of bolts |45 threading into the shoes |26. _ ä modate any misalignment which may be present. 'I‘his swings the shoes in unison therewith. Also, by reason of the particular spring mounting dis closed, equalized contact pressure of each of the shoes against the stationary contact is provided, and the wiping action of the shoes across the contact surfaces serves to maintain these sur faces clean and bright. In Figure 11, I have shown a modified type of contact structure in which two round ended cylindrical contact members, |66 and. |62, are adapted to receive therebetween a suitable con tact sleeve formed of a plurality of contact shoes |63. Each of the contact shoes is provided at Retaining means |46 are carried by each of the .opposite ends with inwardly beaded portions |64 15 arms |42 at the ends thereof, whereby the shoes 15 |26 are supported upon the arms |42 by means `having substantially line contact engagement about the external surface of the members |60 of the bearing of the spring members on the up per edges of the arms |42. This provides for and |62, whereby circular line contact of the resilient mounting of the shoe members upon shoes |63 with the external cylindrical surfaces 20 of the members |60r and |62 is provided. Suit 20 the spider |40, whereby the shoe members may move radially inwardly and outwardly under the able tapered recesses |65 are formed in the ex ternal surfaces of each of the shoe members, pressure of springs |44 to be expanded or con and receive helically coiled springs |66 seating tracted, as desired.A thereagainst and biased into position by means A hollow contact sleeve |50, or any other de of a polygonal shaped sleeve member |61 main sired type of contact, is mounted in fixed posi tion above the tube |05, and has an externally taining the shoes in pressure engagement with the contacts |60 and |62. This provides for enclosing insulating member |52 carried there about and maintained in predetermined position equalized contact pressure of the beaded portions |64 of each of the shoes against the contact sur.- n with respect to the contact sleeve |50 by means 30 of the lock nut |53 bearing-against the lower faces. In Figure l2, I have disclosed a second type of end of the insulator |52 and threaded onto the contact sleeve comprising a cylindrical member contact sleeve. ' In the operation of the construction shown in slotted longitudinally from the opposite ends in Figures 8, 9 and 10, rotation of the crank |24 'Wardly past the central portion thereof, -the serves to rotate the shaft ||0, causing the nut member |10 having slots | 12 extending from | 32 to travel longitudinally of this shaft. This one end thereof which Aare alternately spaced results in downward movement of the member with respect to slots |13 extending frtm the op |35 from the position shown in Figure 8, which posite end thereof, the inner ends of the ad results in drawing of the upper ends |43 of the jacent -slots overlapping', as shown. The sleeve shoes |26 downwardly out of engagement with is adapted to fit over the rounded tips |14 and 40 |15 of a pair of contact studs |16 and |11, re-_ the contact end of the sleeve |50, thereby break spectively. Due to the slotting of the sleeve |10, ing contact between the contact |50 and the con the fingers formed by the slots |12 and |13 are tact |00. This downward movement is accom modated by means of the recessed portions |21 resiliently maintained in pressure engagement oi.' the shoes |26 which ñt around the beaded with the surface of the ball contact tips |14 and 45 portion |25 -of the tubular member |05. The |15, thereby maintaining a substantially equal traveling nut |32 can move downwardly upon ized contact pressure about each- of these con the shaft ||0 until the spider |40 rests upon the tact tips. The sleeve |10 or the contact as-` sembly comprising the shoes |63 of Figure 11 upper surface of the tubular member I 05. Inas much as the normal external diameter of the may be reciprocated with respect to the contacts tubular member |05 is substantially less than the in any desired manner to provide for closing and opening of the circuit therebetween. beaded portion |25 thereof, or the external di It is therefore believed apparent that I have ameter of the contact sleeve‘l50, the shoes will be expanded against the pressure of springs |28 provided an electrical connecter adapted for use in situations in which contacts may be slightly 55 and |43 when in the position shown in Figure 8. misaligned, and which provides for the main Consequently, upon» downward movement, the shoes will contract, but cannot contract inwardly tenance of equalized contact pressures and» for, beyond the external diameter of the member the floating support of the contact member be ` |40 or the external >diameter of the member |05. tween the spaced contacts. Having described my invention in accordance 60 When the shoes have reached their lowermost 60 with the patent statutes, what I claim as new position, the upper ends |43 thereof are con and desire to secure by Letters Patent is: tracted to a slight extent by reason of the pres 1. In an electrical connecter, a pair of spaced sure of springs |44. so that upon upward move ment into switch closing position, the shoes will Contact studs, a full-floating contact structure mounted for universal movement about each of be spread radially as they come into engage said studs, one of said contact structures Lbeing ment with the contact sleeve |50 due to the up wardly and outwardly flaring end portions |43 adapted to receive a connecting member Aendvvise thereof, so that any slight misalignment of the therethrough, and a connecting member mov contact |50 and the tubulare member |05 will able endwise' through said one contact structure be accommodated by the swinging movement of into the other of said contact structures and 70 70 the sleeve |35 about the traveling nut |32, the having floating engagement between said con f . sleeve having substantially universal movement tact structures. , 2. In an electrical connecter, a pair of spaced about this nut so that as thecontact shoes are guided into engagement, the sleeve may rotate contact studs, each of said studs having a spring controlled contact structure mounted for uni about the nut in any desired manner to accom 75 2,123,631 versal movement thereon, one of said contact extending outwardly of said studs, the shoes for studs being adapted to receive a contact mem one of said studs defining an outwardly ilaring ber endwise therethrough, and a contact mem cylindrical opening, the shoes for the other stud ber movable endwise through said one contact having inwardly extending contacting portions atstud and into engagement between said contact their free ends, and a contact member movable structures to eiïect electrical contact between endwise through said one contact stud into said said studs through said structures. opening and within said contacting portions for 3. In an electrical connecter, a pair of spaced iloating support between said studs. contact studs, a plurality of contact shoes for 9. In combination, a pair of spaced contact 10 each of said studs, means for maintaining the studs having rounded head portions, one of said 10 shoes for each of said studs in equalized pres studs being adapted to receive a rod-like member sure contact with said respective studs, one of endwise therethrough, a plurality of contact said studs being adapted to receive a connecting shoes for said one of said studs having ball and member endwise therethrough, and a connecting socket engagement at one end about the head 15 member movable endwise through said one stud portion of said stud and having inwardly extend into engagement between the respective shoes of ing contacting portions at the opposite end. 15 each of said studs for effecting contact there spring means intermediate the ends of said shoes between. » - 4. In an electrical connecter, a pair of spaced 20 contact studs, one of said studs being adapted to receiv'e a connecting member endwise there through, a plurality of contact shoes for each of said studs, means for maintaining the shoes for each of said studs in equalized pressure con 25 tact with said respective studs, said means com prising an enclosing housing for said shoes hav lng spring means biased between the interior of said housing and each of said shoes, and a con necting member movable endwise through one of 30 said studs into engagement between the re spective shoes of each of said studs for' eiïect ing contact therebetween. 5. In an electrical connecter, a pair oi.' spaced contact studs, one of said studs being adapted 35 to receive a connecting member endwise there through, a plurality ofcontact shoes for each of said studs, means for maintaining the shoes for each of such studs in equalized pressure contact with said respective studs, said means for one of said studs comprising a spider member hav ing radial arms receiving said shoes and spring means urging said shoes fcentrally toward said spider member, and a connecting member mov able endwise through the other of said studs into engagement between the respective shoes of each of said studs for eiïecting contact therebe urging said shoes together, a plurality of corre- ` sponding contact shoes mounted at one end about the head portion of the other stud and 20 having outwardly ñaring surfaces at their oppo site ends, corresponding spring means for said second plurality oi' shoes, and a rod-like member movable endwise through said one stud and the contacting portions of said first plurality of shoes 25 and guided at its opposite end by said flaring surfaces into contact within said second plurality of shoes. ' ` 10. In combination, a ñrst terminal stud adap't ed to receive a _connecting member endwise 30 therethrough, contact shoes mounted for uni versal movement thereabout and extending out wardly of said stud, a second terminal stud, con tact shoes mounted for universal movement about said second stud and extending outwardly 35 toward said ñrst stud, a connecting member movable endwise through said ñrst stud and be tween said contact shoes carried thereby into engagement within the contact -shoes carried by said second stud, and means for equalizing the 40 contact pressure between each of said-shoes and the corresponding studs and between said shoes and said connecting member. ' 11. In combination, a pair of spaced contact studs, contact shoe structures mounted for uni 45 versal movement about each of said studs and tween. `Iextending toward each other, one of said studs 6. An electrical connecter comprising a ñrst having an axial passageway therethrough, and a terminal stud having a rounded head portion contact rod movable through saidv passageway and adapted to receive a contact member end and having a ball tip portion engageable in the wise therethrough, a plurality of contact shoes contact shoe structure of said other stud. mounted for conjoint universal movement about the contact shoe structure of said ilrst stud said head portion and deilning a contact-re engaging about the lateral surface of said rod ceiving opening, a second terminal stud spaced as it is moved into engagement with the con 55 from said ilrst stud and having contact shoes tact shoe structure oi’ said other stud. mounted for conjoint universal movement there , 12. An electrical connecter comprising, in com- 4 about, and a contactv member movable endwisel bination, a pair of spaced apart contact mem and axially of said ñrst terminal stud into en bers having convex spherical contact portions, a gagement in said opening and with said contact polygonally shaped' support member disposed shoes of said other stud. _ substantially coaxially with said contact mem 7. An electrical connecter comprising a pair bers, a contact shoe individual to each inner side 60 » of spaced terminal studs having rounded head portions, a plurality ofcontact shoes mounted for universal movement about each of said head por tions, one of said studs having an axial opening therethrough, and means movable through said 1 opening and into engagement between the re spective contact shoes of each stud for eil'ecting electrical connection between saidl studs. 70 8. In combination, a pair Vo1' spaced contact studs, supporting brackets for each of said studs, >said contact studs being adapted to receive a contact member endwise therethrough, a plural ity of contact shoes having substantially uni versal movement about each of said studs and of said polygonal support member and arranged and adapted to interconnect said contact mem bers by contact engagement with said convex spherical contact portions thereof, and resilient 65 means acting between said support member and said contact shoes for biasing them inwardly in to contact engagement with said convex spher ical contact portions oi' said contact members. 13. An electrical connecter comprising, in 70 combination, a pair of spaced apart contact members having convex spherical contact por tions, a polygonally~ shaped support member dis posed substantially coaxially with said contact , members, a contact shoe individual to each in aiaaeai ner side of said polygonal support member and arranged and adapted to interconnect said con tact members by contact engagement with said convex spherical contact portions thereof, means preventing detachment of said contact shoes from one of said contact members, said contact shoes being readily detachable from the other of said contact members, and resilient means in dividual to each of said contact shoes and acting between the same and the side of said polygonal support member individual thereto for biasing said contact shoes inwardly into contact engage ment with said convex spherical contact portions of said contact members. 14. In an electrical connecter, a pair of spaced î contact members. one of said contact membersA being adapted to receive a connecting member` endwise therethrough, an assembly of contact ñngers for each contact member, a connecting member movable endwise through said one con tact member into engagement with the respec tive assemblies of contact iingers for effecting _contact therebetween, and resilient means for maintaining equalized contact pressure between said assemblies of contact ñngers, spaced con tact members and connecting member for pre determined positions of misalignment of said spaced contact members. CHARLES H. KOEHLER.