Патент USA US2115642код для вставки
April 26, 1938. E. MARTIN ’ ELECTRICAL CONDUCTOR TERMINAL CAP Filed Aug. 5, 1929 2,115,642 2,115,642 V Patented Apr. 26,1938 ' UNITED STATES PATENT OFFICE 2.115.642 eu'zcrmcsr. oonnuc'roa TERMINAL cAP Earl Martin, Chicago, Ill., assignor to George H. _ Glade, Jr., Chicago, Ill. I , Application ‘August 5, 1929, Serial No. 383,537 13 Claims. (Cl. 173-9361) This invention relates to electric conductor " introduce the blades. the notch 4” at the end of terminal caps, particularly of the type used in the part 4“ of each blade is straddledover a making connections for, electric utility devices ' corresponding wire and forces it into its corre ' such as‘ ?oor lamps,‘ wash machines, toasters and sponding cavity 2“ of the cap 2; the wires thus assuming the formation shown ‘in Fig. 6. The 6 5 other portable devices. _ , dimension of the cavity 2* is such as to accom- ~ One of'the objects of the invention is to pro 'modate the thickness of the part 45 of the blade,‘ duce a terminal cap consistingfof few parts. Another object 01' the invention is to produce and to cause close'and suiiicient contact between the blade and the wire, and needing no further ’ a terminal cap of simple design. 10 Another object of the invention is to produce bond for reliably conducting the current 'from one 10 - , to the other. a terminal cap of sturdy construction. . Another object of the invention is to produce a terminal cap that permits of the wire ends being vconnected thereto in a secure and reliable 15 manner. > , \ ‘Another object of the invention is to provide a terminal cap of the character described, that permits 01' the wire ends, being secured in good electrical contact with the blades, without the '20 use-oi solder o1" auxiliary‘mechanical devices. Another object of the invention is to provide a terminal cap for conductors, having blades projectingtherefrom and cooperating therewith to provide a substantial and reliable connection 25 of said blades to the cap members and to the conductors. \, , . . Another object of the invention is to attain those ends and other‘ objects which will be point ed out in the claims. 30 ' In the drawing, in which a ‘commercial embodiment- of the invention is shown‘:——-. Fig. 1 is a side elevation of the device. Fig. 2 is an end view thereof. , 3 ' part 4a and these notches preferably form pro jecting barbs 4° so that when driven into the cavities 2L4“ of the cap these barbs become 15 imbedded in the material of the cap and tend to resist withdrawal thereof. ,_ - _ ' These barbed ends are forced into the cavities of the cap until the bent portions 4‘1 of the blades encounter the bottom of the grooves 2b-2b and are stopped thereby; these grooves 2” further act to securely retain the blades in parallelism. . The blades 4-4 are made of suitable electrical , conducting material, and the cap body is made of any suitable insulating material, such as semi- , 25 hard rubber, ?bre or any other substance which will lend itself readily in the construction of this device. It will of course be understood that due to the comparative stiffness of the blades 4--4 and the 30 convenient shoulder 4d the blades may be formed without the prongs 4c and driven into the open ings 2a being frictionally held therein. This has Fig. 3 is an axial section taken as indicated at the line 3-3 of Fig. 2. Fig. 4 is an end view of the cap alone, wit ‘ the blades and wires omitted. .. The blades 4 are notched at'the edges of the . - - Fig. 5 is a perspective view of onev of the blades. Fig. 6 is a view showing how the wire is formed 40 when assembled‘ in position. In Fig. 1 the cap 2 is shown as attached toa cooperating plug 3 which has scggrsthread con nections with a socket or outlet , which may be understood as indicating a source of electric cur as G! rent to be conducted by the cable D. The cable D is inserted in the bore 3 of‘ the cap member 2, and the wires l--.l of the cable are separated and spread in opposite directions, and made to contact with blades 4-4. 50 In assembling the blades 4-4 and the cap 2, it _ will be understood that suitable tools or devices are employed for holding the blades in proper position while driving the ends 4°~---4a thereof into the cavities 2**—2a of the member 2. a 55 Having spread the wires 1-! in readiness to been found a very effective way to hold the prongs ‘in place particularly when the'cavities 2“ are 35 formed slightly smaller than the width of 2. prong and the wire I. ' It will be noted that this construction provides vmeans for connecting the two wires to the blades or terminals, and the blades may be connected 40 to the cap and the wires without the use of any auxiliary devices such as screws, rivets or other expedients. _ ~ ' It .will be understood that many changes and modi?cations may be made without departing 45 from the spirit of this invention. I claim: ' , h ' , 1. In a device of the character described hav ing a. one-piece cap body and blades, said body having an opening therethrough, insulated con- '50 ductors therein with the ends thereof bent apart at one end of said opening and bared of insu lation, spaced cavities in said body near said end within which cavities said'blades are driven, said bared ends being electrically connected to said 55 2 2,115,042 blades, and means formed integral with the blades and located within said cavities to grip the walls thereof and secure said blades against with drawal. 2. In a device of the character described in cluding contact blades and a body member for mounting the same, said body member composed of resilient material and having cavities therein into which said blades are driven to assemble the same, said cavities constituting means for mount said base from the side opposite that through which said conductors enter, each of said prongs having a portion too large for ready insertion in, the corresponding hole but forced into said hole to secure the prong in position and prevent withdrawal, the outer portions of said prongs extending in the direction ?rst mentioned, a re cess extending from the open end of each hole to 1 said passageway, the ends of said conductors ex tending in opposite directions in said recesses and 10 ing the said blades in the said body member, the frictionally held between said forced-in portions portion of the blades occupying the cavities hav of said prongs and the walls of the holes to secure _ ing barbs formed thereon to secure same in posi said conductors in good electrical contact with tion and prevent withdrawal thereof. said prongs. _ 15 3._In a device of the character described in 9. In a plug construction, the combination of a cluding contact blades and a body member for mounting the same, said body member composed plug body formed of insulating material and hav of resilient material and having cavities therein ing a recess in the face at one end and an axial into which said blades are driven to assemble the bore extending from said'recess through.’ said body, insulated conductors entering said bore at same, said cavities constituting means for mount ing the said blades in the said bodymember, the : vthe other end of said body and extending there 20 .through, and a pair of substantially parallel blade portion of the blades occupying the cavities hav ing barbs so formed thereon that the blades may members each having a pressed at in a cavity extending inwardly from said recess near the exit be more readily entered than withdrawn, but se end of said bore, the ends of said conductors curely held against accidental withdrawal. 4. An electrical ?tting comprising a body of being bare and each end extending along the side 25 non-frangible insulating material having parallel of one of said blade members and folded around prong receiving openings and sheet metal mem— the same to engage ‘the other side also, said bers having barbed prongs of a thickness equal to folded ends being compressed between the walls the thickness of the sheet and of a width slightly of said cavities and said blade members,‘to estab greater than the diameter of the holes, the prongs lish mechanical and electrical connection there being incapable of easy insertion into the open- ' ings but capable of being forced into the same, ‘the barbed prongs being effective to resist re moval. - 5. An electrical fitting comprising ,a body of non-frangible insulating material having a face and two spaced holes extending inwardly from the face, and metallic members having prongs 40 forced into the holes, the sides of the prongs having laterally extending projections which en gage the walls of ‘the holes and resist removal. 8. In a device of the character described in cluding contact blades and a body member for with.- ~ 10. In a plug construction, the combination of a plug base of insulating material having a'recess in the face at one end and having an axial bore extending from said rebess through said base, in sulated conductors entering said bore at the other end of said base and extending therethrough, a pair of substantially parallel blades, the inner portions of which fit within a pair of substan tially parallel openings in said base, said open ings being spaced on opposite sides of said bore and communicating with the outer end thereof by means of said end recess, said blades having mounting the same, said body member being com 'notches in the inner ends thereof, said conduc~ posed of insulating material and having cavities tors being bent apart and positioned in said end recess and having the ends thereof bared and therein into which said blades are forced to as semble the same, said cavities constituting means each bent to follow the said inner portion of a for mounting the said blades in the said body blade along one side, through said notch, and member, the portion of each blade which occupies back along the other side, and clamped against a cavity having a barb formed thereon to secure said blade by the wall of the opening, to main same in position and prevent withdrawal thereof. tain eifective electrical and mechanical contact 7. An attachment plug cap comprising contact therewith. 11. In combination, a one-piece, molded at prongs and a preformed supporting base therefor having a passageway therethrough into which conductors may be led in one direction for con nection with said contact prongs, a pair of prong receiving holes arranged on each side of said pas sage-way and extending inwardly but not through said base from the side opposite that through which said conductors enter, each of said prongs having a portion too large for ready insertion in the corresponding hole but forced into said hole to secure the prong in position and prevent withdrawal, the outer portions of said prongs extending in the direction ?rst mentioned, and the ends of said conductors being secured in good electrical contact with said prongs. 8. An attachment plug cap comprising contact 70 prongs and a preformed supporting base therefor having a passage-way therethrough into which conductors may be led in one direction for con nection with said contact prongs, a pair of prong receiving holes arranged on each side of said pas sage-way and extending inwardly but not through tachment plug of. insulating material, having a longitudinal opening therethrough, a pair of sub 56 stantially smooth bore recesses in one end of said plug extending into but not through the same, and arranged on opposite sides of said longitu dinal opening substantially parallel thereto, con tact blades having their inner portions within said recesses, said portions having a transverse dimension in excess of that required for a sliding fit, whereby said blades are assembled by forcing the same into said recesses thereby gripping the walls thereof to maintain the assembled relation, said plug having a transverse groove in the outer end, connecting the outer ends of said recesses with the outer end of said longitudinal opening, to receive and partially enclose conductors led in 70 from the opposite end of said longitudinal open ing and extending to said blades. 12. In a device of the character described in cluding contact blades and a body member for mounting the same, said body member being com 75 3 ‘ 2,115,642 posed of insulating material and having cavities therein into which said blades are pressed to assemble the same, said cavities constituting means for mounting the said blades in the said body member, the portion of each blade which occupies a cavity having a barb formed thereon to secure the same in position and prevent with drawal thereof, and conductors each having a bared end positioned in one of said cavities in good electrical contact with the corresponding blade. 13. An attachment plug cap comprising con tact prongs and a preformed supporting base therefor having a passageway therethrough, con ductors in said passageway, a pair of prong-re ceiving holes arranged on each side of said pas sage-way and extending inwardly but not through said base from the side opposite that through Which said conductors enter, each of said prongs having a projection thereon with an inclined face sloping in a direction to facilitate insertion but not withdrawal of the prong from the corre sponding hole, said prongs having portions seated in said holes with other portions extending out wardly, a recess extending from the open end of each hole to said passageway, the ends of said conductors extending in opposite directions in said recesses and frictionally held against said seated portions to secure said conductors in good electrical contact‘with said prongs. EARL MARTIN.