Патент USA US2125713код для вставки
Aug. 2, 1938. A. M. DRAVING ELECTRICAL TERMINAL PRONG WITH INTEGRAL LUG Filed ‘Feb. 18, 1936 2,125,713 Patented .2, 1938 ' 2,125,713 UNITED STATES PATENT vcaries - ‘ 2,125,713 ‘ ELECTRICAL TERMINAL PRONG WITH ' INTEGRAL LUG ' Arthur M. Drawing, Philadelphia, Pa., assignor to - ‘ Hugh H. Eby, Inc., Philadelphia, Pa. ‘Application February .18, 1936, Serial No. 64,481 ' I 2 Claiins.._ (Cl. 173—361) in the body of the tubular prong, sidewall offsets from the abutment shoulders, and the sidewall and more particularly to a terminal prong with ' extensions to form the soldering lug. Fig. 4 shows a top View of Fig. 3. an integral lugJormed and drawn from strip or _ My invention relates to improvements in an electrical terminal prong with an integral lug, 5 sheet metal. - > _ Y Heretofore electrical plug-in devices using a terminal prong in combination with a separate soldering lug have been found costly to manu facture due to the assembly and riveting opera 10 tions, also to the cost of the parts, and further more detective electrical connections have re suited from poor riveting of the lug to the prong.‘ One object of my invention is to provide a tubular terminal prong and soldering lug in one integral unit. } ' - I Fig. 6 adapted Fig. 7 sidewall shows an aperture in an insulatingbase to receive the prong sidewall extensions. shows a front elevation of a prong with extensions inserted in an aperture, the' 10 insulating base being shown in section. . Fig. 8 shows a view similar to Fig. 7, but after‘ the sidewall extensions have been‘ folded in and pressed together, providing clamping means and a soldering lug. Fig. _9 is a top view of Fig. 8. v 15 . A further object is to provide a tubular ter minal prong with a lug of uniform shape and ing the integral lug of a prong after the assembly maximum strength at low cost. and clamping operations. ‘ A further object is to provide a.tubular ter 20 minal prong with a lug made from sheet metal in one stamping and drawing operation. A further purpose‘ is to provide an abutment shoulder on the prong portion at its open end. A further purpose is to provide a ‘lateral onset 25 of the sidewall extensions at the termination of the tubular prong's open end providing means for forming said sidewall extensions into a. sol dering lug. fastening the prong/and the lugv to an insulating base member. . Fig. 10 is a top view of an insulating base show ' Fig. 11 is a side elevation of Fig. 10, Referring to the drawing like numerals refer to like parts in the ?gures where they appear. To produce a tubular prong, seamed and with uniformly true sidewalls, having the same ex tended and providing means for forming a sol dering lug, and also means for anchoring the prong with the lug unit in an apertured base, I I provide a ductile strip or ?at sheet of metal of correct uniform width so that when the prongs A further purpose is to provide sidewall ex 30 tensions at the termination of the tubular sec tion of the prong to form means for rigidly 35 Fig. 5 shows a side elevation of Fig. 3. ' . ‘ are formed by the drawing and folding 'method, iii and it’ become seams i l and I i’of the tubular body portion i2 whenthe blank is forced into the cavity ii and the remaining portion’ of the blank is forced into the cavity it. being con?ned inside A further object is to provide an integral ter minal prong and lug in combination with an elec and out by punch and die so that when the shoul trical plug-in device. die, the tapered end portions 22 of the blank are ‘ v A still further purpose is to provide an insulat— der iii of the punch enters the cavity it of the 35 pressed outwardly and form the shoulder it, and ing base having suitably formed apertures to’ the parallel sidewall extensions it areiormed receive and hold a drawn metal prong with an 40 integral'lug. With the foregoing and other objects in view I have devised ‘ an improved construction and method of fabricating from sheet metal an intee grai terminal prong and soldering lug, and my 5' invention lies in the structure and features here inaiter described and claimed. ‘ Referring to the drawing: Fig. 1 shows a metal strip with the ends ta pered and punched to form an integral soldering lug prior to drawing and forming ‘operation. - Fig. 2 shows a punch and a cross section thru when ‘the aforementioned shoulder ‘it of the punch presses outwardly and down on the strip 4:0 oi’ sheet metal, seating the same on the shoulder it of the die. This shoulder may be formed at any .point intermediate the rounded closed end it and the ends of the sidewall extensions 23. By increasing the diameter of the die cavity 20 over that of‘ the cavity 2! and employing a blank of uniform width as between points 25 of. the blank shown in Fig. 1, an abutment shoulder i5 is formed. separating the sidewall extensions... it‘ v with clearance space it between the same. Ta- . pered end portions 22 of’ the blank shown in Fig. a die for drawing and forming a tubular prong 1 are pierced at it and a common lug is formed with an integral lug according to my invention. Fig. 3 shows a ‘ii-out elevation oi'the prong '55 andulug also showing one oi! the two iold seams after mounting the prong on the insulating base, providing means for attaching a wire terminal 3 i , as shown in Fig. 8. An insulating base it, Fig._ 2. 2,125,713 10,‘ is apertured as shown in Fig. 6 thru which Having thus set forth the nature of my inven prong sidewall extension pieces I‘ are inserted , tion, what I claim is: as shown in Fig. 7. A portion of said extension 1. In combination, a base member of insulat pieces It extends thru and past the top surface ing material having an aperture therethrough, 25 of the aforesaid base and after the abument portions of the said extension pieces M are then the aperture being generally circular and the wall thereof being provided with apluralityj of inwardly extending projections, and a generally tubular terminal prong secured in said aperture, the said prong having upwardly extending side folded over and pressed inwardly until both of aforesaid sidewall extensions are pressed to wall extensions, the diametral distance between the sidewall extensions being greater than the shoulder i5 01’ the tubular prong I2 is ?rmly seated against the under side of the base pro jections 21 in the aperture, and the projecting gether as at QL'fOI‘ITLiHg a common soldering lug diameter of the prong proper and the projec and also providing means for clamping the prong tions in the aperture extending into the spaces between the said projections whereby the prong is prevented from rotation. 2. A plug-in device comprising a base member having an aperture therethrough, the wall of the aperture being provided with a plurality of in and lug unit securely in the aperture of the insulating base. An aperture 28:: in an insulating base member 26 to receive and hold a prong with a lug member is shown in Fig. 6 in which 29 shows the edge of said base, the aperture is generally circular in form, its diameter being slightly larger than the overall dimensions of the prong at the shoulder IS, the base projections?! extend inwardly from wardly extending projections, aterminal prong. generally tubular in con?guration and provided 20 at one end with a plurality of axially extending lugs o?set radially therefrom, the said lugs be ing spaced apart circumferentially of the prong a distance substantially equal to the width of the the circumferential edge 28 of the aforesaid aper ture providing means for preventing turning of the prong with its integral lug and also provid aperture wall projections andv the said lugs be-' - ing means for seating the prong abutment shoul projections are interposed between them, where ing so disposed in the aperture that the said der l5 and for folding over of the sidewall e'x— . by the prong is prevented from rotation. tensions H at 32, as previously stated. ARTHUR M. DRAVING.