H3045 0R 20408;‘556 ~ #5 Oct- 1, 1945- c. A. HASENWINKLE Search Room 1‘ 2,408,556 SAFETY PLUG-IN CONNECTOR Filed Sept. 30, 1944 lNVENTOR Carl 1i. Hasen Wink/e QM M ATTORNEY _ Patented Oct. 1, 1946 Search Room 2,408,556 ' E UNITED STATES PATENT OFFICE 2,408,556 SAFETY PLUG-IN CONNECTOR Carl A. Hasenwinkle, Bison, S. Dak. Application September 30, 1944, Serial No. 556,510 1 Claim. (Cl. 173-361) 1 2 This invention relates to certain new and use other side, and between this shoulder and the outer edges of the separating member I! the base ?anges l8 and I‘! of the prongs lid and Ila ful improvements in plug-in connectors, and more particularly to the arrangement of the wire terminals and the metal connector prongs, where are arranged. by the screws which secure the base oil the prongs to the insulating body of the connector will be under constant pressure from the wire terminals, so that they will not come loose, and the prongs These prongs are thus con?ned against lateral displacement by the shoulders I‘ and I5 and by the outer edges of the separating member l2, and the base ?anges are secured in place by will be more ?rmly held in place on the insulat~ means of the screws I 61) and I'll), which are ing body. , 10 threaded through screw holes it’ formed in the Another object of the invention is to provide a base ?anges and into the body I. v plugin connector with an integral insulating par The base ?ange I8 is provided with a binding tition for separating the wire terminals, and fur screw lie, which is formed with a relatively large ther to provide relative deep pockets on the op head, and the base ?ange I1 is provided with a posite sides or the partition, which securely an 15 binding screw llc, which is also provided with a chor the base ?anges of the prongs against lateral relatively large head. These screw heads are lo displacement. cated below the outer surface of the separating With the above and other objects in view the member I 2, and the integral partition or out standing rib l3, extends outwardly of the heads structions, combinations of parts and relations 20 of the binding screws and the adjacent outer between the parts, clearly described in the fol faces of the separating member I!’ thew lowing speci?cation and fully illustrated in the Winsulatin drawing, in which: 20, w c e ormed with slots washers I a and IS 20aa t invention consists in certain new and useful con réceivethe'prongslmiiiif?it'qrhe'se ‘washers Fig. 1 is a central sectional view, taken on line l-l of Fig. 2, looking in the direction of the 25 are formed with straight inner edges 19' and 20', adapted to ?t against the sides of the central arrows. partition or rib l3, and with convex curved outer Fig. 2 is a bottom plan view, showing the insu edges l9" and 20", adapted to ?t against the lating face pieces removed. ' marginal rim II. Fig. 3 is a, central sectional view, taken on line 3-4 of Fig. 2, looking in the direction of the 30 A wire terminal II is extended from the wire passage 1 across the head of the holding screw 16b, of the base ?ange l8, and. the wire end Fig. 4 is a detail plan view 01' one of the con thereof is clamped in place by the binding screw ductor prongs. 160. Fig. 5 is a detail perspective view of one of the The connector prong of each base ?ange ?ts insulating pieces or washers. 35 closely against the straight edge of the separating Fig. 6 is a perspective view. arrows. member, and when clamped in place by its con necting screw will be braced against this sepa Referring to the accompanying drawing which illustrates the practical construction of my in vention 5 designates a body formed of suitable insulating material, and constructed with a cen tral wire receiving opening 6 and with separating wire passages ‘I and 8 which lead from this cen rating member. 40 - The insulating sheaths oi the conductor wires are nested in the pockets 9 and It. on opposite sides of the central partition, so that these wire sheaths cannot have physical contact with the tral opening and communicate with the pockets c‘ompanion plug-in connector or wall socket, in 9 and Ill adjacent to the inner side of the plug-in 45 which the connector prongs are forced, and the connector body 5. wire terminals will not be disturbed or displaced The inner side of the plug-in connector body by use. 5 is formed with a marginal rim II and is pro The insulated wire extends from the outlet hole vided with a separating member l2, which is of the wire passage around the outer side of the shown with an integral partition l3. This sepa rating member I! may be formed integral with 50 prong to engage the binding screw, and the prong is thus held under the pressure of the wire against the body 5, or made of a separate piece and ce the adjacent straight edge of the separator. mented or otherwise attached to the central por tion of the body 5. This arrangement makes it dii'licult, it not im possible, for the frayed ends of the wires to cross The body 5 is also formed with a shoulder ll ‘ on one side and a similar shoulder It on the 55 from their binding screws and establish con 2,408,556 4 ductive contact with each other, and thus short the circuit through the wires. ' Should the wires be pulled from their binding posts, for any reason, they will leave the con hector body in the form of a Y, so that conductive contact between the wires will not take place. The marginal rim of the body serves to take dentally pulled- out of the connector, the wire ends would not be brought together to short the circuit, but would leave the connector body in diverging relation, so that accidental contact may be prevented. It is understood that various changes may be made within the scope of the invention as de?ned up any thrust imposed on the plug-in connector. in the claim forming a part of this application. when the prongs are forced into the slots of the Having described my invention I claim': receiving socket or wall connector member, not 10 A plug-in electrical connector, comprising a shown. body formed fronininsulationrm?terial and pro The separating member is formed with a recess vided‘wit?'i'afsocket in one side thereof to receive l2a to receive each head of the binding screw. the end of an electrical cord and wire passages The adjacent edge of this recess at l2a' is concave, diverging from said socket to thebppos'itfside and acts to limit the outward play of the frayed 15 of’lsaid body, said body having open wells sur end of the wire, so that it is more readily forced rounding the outer ends of said divergent wire under the wide head of the binding screw and Passages and stielgiraulamcketunjach side retained in clamped position, since this concave of said body and an integral partition,_a,connegtor edge l2a.’ acts both as a guide for inserting the ‘ prong having a base snugly ?tted ineach well and wire end under the clamping screw head and as 20 a pronrai‘niipifo'jecting at right angles to said a stop to limit the outward displacement of the W said wells having a right angular frayed wire from the clamping screw. If desired shoulder engaged by its prong arm, a screw the wire may be curved away from the prong. threaded through each base into said body to hold The other wire terminal 22 is extended from each connector prong in place, and a semicircular the wire passage 8 across the outer side of the 25 washer of insulatingwmnatgial ispose 1n eac prong flange and its clamping screw Ha, and is s‘emicl?s'wc?ét?and p'r'ov'W e "witl'i‘amslot retained in place by the binding screw No. througrwhichwthe prong arm thereof projects, It will be seen that I have designed a plug-in the inner edge of each washer engaging the side connector which prevents the circuit wire ends of said partition and both washers being disposed from having conductive contact with each other 30 flush with the outermost surface of the body ad to short the circuit, that the prongs are reinforced jacent thereto. . by the manner of installing them in the connector body, and that should the electrical wires be acci CARL A. HASENWINKLE.