_ Nov. 5, 1946. .1. E. STEVENS 2,410,691 ELECTRICAL CONNECTOR Filed Ma_r0h l9,v 1942 50 4 3 4 ll INVENTO/P ~ J.E. STEVE/VS ' B)’ Jréff. - Hz A7‘ ORNEY ' Patented Nov. 5, 1945 2,410,591 ' UNITED STATES PATENT oFFicE" ELECTRECAL CONNECTOR’ John E. Stevens, Silver Beach, N. Y., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York 1 Application March 19, 1942, Serial No. 435,335 5 Claims. (01. 173—328) This invention relates to electrical connectors, 2 electrically connecting electrically operated de spacers dividing the adjacent side of the body into three substantially equal areas. An abut ting member 2! is also formed integral with the vices to terminals in fuse boxes. In many factory departments the power serv body H) with the spacers leer 20 Or secured with 5 the spacers to the body, all of which areformed andlmore particularly to connectors for use in ices for the various electrically operated machines are provided with fuse boxes available in ?xed positions upon walls or columns, and it is fre of suitable insulating material. Clamp units, in dicated generally at 23, 2d and 25, are disposed at spaced positions, as illustrated in Fig. 3, these units being identical in structure and a descrip quently desirable to temporarily use ?oor scrapers or other electrically operated devices in such lo 10 tion of one will apply to all. Consider, for ex calities where electrical connections therefor are ample, the unit illustrated in Fig. 2. This unit not permanently made available. In such in consists of a pair of clamping jaws 21' of the con stances it is found advantageous to make use of tour illustrated in Figs. 2, 3 and 4 and having in the fuse boxes for such connections, this, how wardly bent integral portions adjacent the cen ever, necessitating a connector adaptable for such 15 ters of their sides, as indicated at 23, for pivotal use. - An object of the invention is to provide an electrical connector which is simple in construc mounting on a common shaft 29. The ends of the shaft extend through elongate apertures 30 in the legs of a U-shaped guide 3|, to maintain tion, easily operable and particularly adapted for the accurate positions of the clamping jaws 2'! electrical connection with fuse terminals of a 20 during their movement into and out of clamping fuse box. positions. A spring 32, of the contour illustrated With this and other objects in view, the inven in Fig. 3,‘ has two coiled portions disposed on the tion comprises an electrical connector having a shaft 29, a central loop portion 33 engaging one bodyof insulating material supporting a plu of the clamping jaws 27 while ends at engage the ra1ity of clamp units normally urged into open 25 other clamping jaw, tending to normally urge position but simultaneously moved into closed po the jaws into open positions. A connecting rod sition by connected cams to cause the clamps to 35 is connected to the shaft 29 by an aperture grip a plurality of terminals. in the rod through which the shaft extends, the Other objects and advantages will be apparent rod extending upwardly (Fig. 4) or to the left from the following detailed description when con 30 (Fig. 2), where a threaded portion thereof is sidered in conjunction with the accompanying connected to a pull rod 3?. The pull rod 31 ex drawing, wherein Fig. l is a front 'elevational view of an open fuse box, with the connector attached to the ter tends through a disc-like cam element 38, an ap erture in the U-shaped guide 3i and through the central aperture of a hollow bolt 40. The hollow minals therein to supply electrical energy to an 03 (I! bolt 40 is provided with a head Ill which serves electrically operated device; Fig. 2 is a vertical sectional view of the con hector; Fig. 3 is an end elevational View of the con nector, and Fig. 4 is a fragmentary detailed View of one section of the connector illustrating the mount ing thereof on a terminal in the fuse box. Referring now to the drawing, attention is ?rst directed to Figs. 2 and 3, which illustrate a body it, of the contour illustrated, having an aperture ll therein adjacent the mounting of a hollow to hold a terminal 42 in place through the aid of a nut 43, the bolt, as illustrated in Fig. 2, ex tending through an aperture in the body H}. A hollow cup-shaped member 44, formed of insulat 40 ing material, is disposed over the nut 43 to seal it against engagement by the hand of the op erator, the outer surface of the cup being dished, as at 45, to receive an actuating cam 56. The cam 46 is formed of suitable insulating material and is centrally grooved to receive the pull rod 3?, which is connected to the cam, through a pivot pin 4?. bracket If, to receive conductors M of a conduc- _ Attention is directed to the contour of the cam, particularly a curved surface 48 which rides on threadedly disposed in the hollow bracket l2, 50 the dished surface 45 of the cup 44 when the cam and, with the aid of a nut ll, the cord I5 is held is actuated, to cause longitudinal movement of tor cord l5. A tubular member It has one end in place. The elements l2, l6 and I‘! unite in the pull rod during the movement of the cam forming a handle for the body I ll. from the position shown in Fig. 2 to the position Insulating spacers l9 and 20 are formed inte shown in Figs. 1 and 4. gral with the body [0 or secured thereto, these 55 The structure of the clamping units 23, 24- and 2,410,691 3 25 thus far described is identical in each unit, there being provided a connecting bar 50 ex tending across the cams 46 and secured thereto, 4 ends of the jaws against their respective termi nals 60. Thus a positive clamping engagement results between the clamping jaws and the ter minals, forming a positive electrical connection this bar being formed of suitable insulating ma terial. UK between the supply of electrical energy leading to the terminal 60 through the clamps of each Attention is now directed to Figs. 1 and 4, unit, terminal 42, conductors Hi, to the socket which illustrate the use of the clamp in forming 65. The electrically operated device 53 may then an electrical connection for an. electrically oper be supplied with the electrical energy by com ated device such as a motor operated hand drill 53. In this illustration a fuse box 55 is mounted 10 pleting the connection of the plug 66 with the upon a wall or column 56 and is provided with a cover 51 to completely enclose theelectrical socket 65. This connection may be maintained during’ the use of device 53, the cams 46 being moved’ beyond a dead center with respect to the mechanism disclosed in the box. In the present pivots 4.1 of the pull rods 31, assuring ‘against ac embodiment the electrical mechanism in the box consists of a mounting 58 to receive electrical 15' cidental release of their connections due to any possible pull on the cable. connections from supply lines 59 and is also pro During the forming of the connection of the vided with sets of terminals 6!! for receiving fuses connector with the terminals in the'fuse box, the 6|. In the present embodiment only the upper abutting member 2| rests against the mounting set of terminals 60 is illustrated, the clamp being unit 58 to serve not only in locating the clamp connected to the lower set of terminals as illus ing jaws accurately with respect to the termi trated more in detail in Fig. 4. In Fig. 4 the nals Gil to which they are to be connected but standard terminal 66 is formed of resilient con to assist in maintaining the clamping units ductive material, U-shaped in general contour, against accidental displacement. When it is de to receive between the arcuately curved portions sirable to disconnect the clamp, all the operator 62 of the legs thereof a standard fuse 6!. The need do is to move the bar 5!] to the position ends of the terminals thus normally project out wardly a sufficient distance, where access may ~ shown in Fig. 2, simultaneously imparting move ment of the cam 46 and thus releasing simul taneously the shaft 29. The spring 32 then func Attention is directed to the contours of the clamping jaws 21 as compared to the contours of 30 tions to move the clamping jaws 21 into open positions. out of engagement with the terminals, the ends of the terminal 60 in Fig. 4, making it thus freeing the clamp for removal from the fuse possible to form a rigid connection between the box. clamping jaws and the terminal when force is behad thereto for the clamping jaws 21. applied to move the outer ends of the jaws into intimate engagement with the outer ends of the In reviewing the operation of the clamp, it will be apparent that the plurality of clamping units may be readily secured to the terminals of the terminal. fuse box, requiring only the use of one hand of In completing the description of the structure the operator to support the clamp by the handle, of the clamp, attention is directed to a socket E5 move it into position through the aid of the abut electrically connected to the conductors l4, these conductors also being electrically connected to 40 ting member 2I and, through downward pres sure with the thumb of the same hand on the their respective terminal 62 of their clamping bar 5!), the cam 46 may simultaneously be moved units 23, 24 and 25. A plug 68, connected to a cord 67 including a similar arrangement of con ductors extending from the electrically operated device 53, is adapted for connection with the .1. socket 65. With the aid of theelectrical connector any electrically operated device,v such as the one shown, may be. provided with suitable electrical into clamping position. A similar but reverse movement imparted to the bar will readily free the clamps by moving the cams into their open positions shown in Fig. 2. . Although speci?c improvements of the inven tion have been shown and described it will be understood that they are but illustrative and that energy in any location where a fuse box is pres 50 various modi?cations may be made therein with out departing from the scope and spirit of this ent. To make such an electrical connection, let it be presumed that the socket 85 and the plug invention as de?ned by the appended claims. 66 have been separated, leaving the clamp with \Vhat is claimed is: ' the short cable connection and the socket 55 at 1. An electrical connector comprising com panion clamping jaws having like ends to jointly tached thereto. The operator may then, ‘by open clamp a terminal when moved into clamping po~ ing the cover 51 of the fuse box 55, move the clampto a position where‘ the clamping units 23, sit-ions and opposing ends to be engaged for movement of the jaws, a shaft having the jaws 24 and’ 25 will be in registration with the set of vpivotally mounted thereon intermediate their terminals 60 to which connection is desired, the abutting member 2| adapted to engage ‘the (30 ends, an element formed to engage the said op mounting 53 to assist in the positioning of the clamp units. When the connector is thus posi tioned downward pressure maybe applied to the bar 50 to simultaneously move the cams 46 about their aligned pivot pins d‘! to move the pull rods posing ends of the jaws and cause movement of the jaws about the shaft to move the said clamp ing ends into clamping positions ‘upon movement of the shaft and clampingjaws relative to the ele ment, a'oam, :and a pull rod operatively connect 3? longitudinally, to effect simultaneous closing ing the shaft and the cam to cause the movement of the clamping jaws of the units. The move ment of the cams 48 through arcs of ninety de grees will cause movement of the pull rods 31 of the shaft and jaws relative to the element. 2. An electrical connector ‘to connect an elec trically operable unit to a supply of electrical energy through substantially ‘Ll-shaped fuse ter and their connecting rods .35, pulling the clamp ing jaws, through their shafts 29, relative to their respective cam elements 38, causing :outward minals supporting fuses ‘between the legs thereof, the connector comprising a .body, a plurality of clamp units each including companion clamping movement of the adjacent ends/‘of the jaws to jaws having like ends to engage their adjacent move the jaws about their shaft 29 andvthus im part simultaneous inward movement of the outer 75 legs of. their respective terminal and’ jointly grip 2,410,691 5 the terminal when moved into clamping posi- - tions and opposing ends to be engaged for move ment of the jaws, a shaft for each clamp unit having the jaws thereof pivotally mounted 8 ing jaws having like ends to engage their adja cent legs of their respective terminal and jointly grip the terminal when moved into clamping po sitions and opposing ends to be engaged for movement of the jaws, a shaft for each clamp unit having the jaws thereof pivotally mounted thereon intermediate their ends, an element for thereon intermediate their ends, an element for each clamp unit formed to engage the said op posing ends of the jaws and cause movement of the jaws about their shaft to move the said each clamp unit formed to engage the said op clamping ends into clamping positions upon posing ends of the jaws and cause movement of movement of the shaft and clamping jaws rel- 10 the jaws about their shaft to move the said ative to the element, and means jointly con clamping ends into clamping positions upon nected to the shafts of each clamp unit to cause movement of the shaft and clamping jaws rel simultaneous movement thereof with their ative to the element, cams operatively connect clamping jaws relative to their elements. ed to the shafts to cause movement thereof with 3. An electrical connector to connect an elec-v 15 their clamping jaws relative to their elements, trically operable unit to a supply of electrical and means connecting the cams for simultaneous energy through substantially U-shaped fuse ter actuation thereof. minals supporting fuses between the legs there-of, 5. An electrical connector to connect an elec the connector comprising a body, a plurality of trically operable unit to a supply of electrical clamp units each including companion clamp 20 energy through substantially U-shaped fuse ter minals supporting fuses between the legs thereof, ing jaws having like ends to engage their adja cent legs of their respective terminal and jointly grip the terminal when moved into clamping positions and opposing ends to be engaged for movement of the jaws, a shaft for each clamp unit having the jaws thereof pivotally mounted thereon intermediate their ends, an element for each clamp unit formed to engage the said op posing ends of the jaws and cause movement of the jaws about their shaft to move the said clamping ends into clamping positions upon movement of the shaft and clamping jaws rel ative to the element, and cams operatively con nected to the shafts to cause movement thereof with their clamping jaws relative to their ele ments. 4. An electrical connector to connect an elec trically operable unit to a supply of electrical the connector comprising a body, a plurality of clamp units each including companion clamp ing jaws having like ends to engage their adja cent legs of their respective terminal and jointly grip the terminal when moved into clamping po sitions and opposing ends to be engaged for movement of the jaws, a shaft for each clamp unit having the jaws thereof pivotally mounted thereon intermediate their ends, an element for each clamp unit formed to engage the said op posing ends of the jaws and cause movement of the jaws about their shaft ‘to move the said clamping ends into clamping positions upon 35 movement of the shaft and clamping jaws rel ative to the element, means in each unit to guide the shaft thereof in its movement relative to the element, and cams operatively connected to the shafts to cause movement thereof with their energy through substantially U-shaped fuse ter minals supporting fuses between the legs thereof, 4:0 clamping jaws relative to their elements. the connector comprising a body, a plurality of clamp units each including companion clamp JOHN E. STEVENS.