Патент USA US2406154код для вставки
Aug. 20,1946. M‘. MEDLIN \ 2,406,154 FUSED ELECTRICAL PLUG Filed Oct. 12, 1944 INVENTéR. MILTON MEDL IN B" W A TTOK/UE y, Patented Aug. 20, 1946 2,406,154 UNITED STATES PATENT OFFICE . 2,406,154 FUSED ELECTRICAL PLUG .Milton .Medlin, Brooklyn, N. Y. Application October 12, 1944, Serial :No. 558,344 .3 Claims. (Cl. zoo-115.5) 1 2 This invention ‘relates to new (‘and useful im fuses to act as an individual fuse for an velec tric object such as a lamp, electric toaster or In the accompanying drawing vforming a ma terial part of this disclosure: Fig. 1 is a perspective view of an electric plug constructed ‘in accordance with this invention. Fig. 2 is an elevational view of the electric plug shown in Fig. 1 with a section of the casing re the like, connected with the plug. 'Heretofore, moved to disclose interior parts. provements in electric plugs. The invention proposes a, new and improved electric plug which is provided with a fuse or ‘ Fig. '3 is a fragmentary enlarged sectional view it was customary to construct commercial elec of the electric plug shown in Figs. '1 and 2, this tric plugs without fuses and to depend upon a main fuse for protection. However when a short 10 section being as though taken on the line '3—3 of Fig. 1. circuit occurred in any one of the objects asso Fig. 4 is a fragmentary enlarged ‘sectional view ciated with the main fuse whichcaused the main fuse to blow, it often required great skill to de test just where the short was located. The short could be in a lamp, or electric wire, or other ob ject, and yet be of such a nature that it is rela taken on the line 4-4 of Fig. 3. _ Fig, 5 is a fragmentary enlarged sectional ‘view 15 of the electric plug shown in Fig. 1, this view being as though taken on the line '5—5 of Fig. '2. Fig. 6 is an elevational view of an electric plug constructed in accordance with a modi?ed form of this invention, a portion of the sectional cas rupted when a short develops, and one of ‘the 20 ing being broken away to disclose interior parts. Fig. '7 is a fragmentary enlarged vertical sec fused electric plugs has its fuse blown. tional view of the electric plug shown in Fig. 6, More speci?cally, the invention proposes an this view being as though taken on the line 'l-‘l'. improved fused electric ‘plug which is character of Fig. 6. ized by a sectional casing of insulation material having its sections releasably connected together 25 The fused electric plug, in accordance with that form of the invention ‘disclosed in Figs. 1-5 in and having recesses formed between their con tacting faces. It is proposed to provide termi clusive, includes a sectional casing I'll of insula tion material having its sections 1 I and l2>releas~ nals for electric leads, mounted within saidre ably connected together with bolts and ‘nuts l3. cesses and provided with clips for receiving and Recesses H! are formed between the contacting ‘holding one of the ends of the fuses. ‘It is also faces of the sections II and i2, proposed to provide prongs for engagement into Terminals [5 for electric leads are mounted an electric connector, and also mounted within within portions of the recesses Hi. The terminals said recesses and spaced from said terminals and i5 are provided with clips l6 for receiving and provided with clips for receiving and holding the holding one of the ends of the fuses ll. Each other ends of said fuses. It is contemplated that the fuses shall be in the nature of fusible strips, terminal 15 is formed from metallic sheet mate rial. Each terminal l5 includes ‘a strip portion or the standard fuse capsules may be mounted bent upon itself forming adjacent arms Ha. The between said clips. ends of these arms Ila are slightly ?ared for It is another object of the invention to so con struct the sectional casing that the recesses eX 40 forming clip portions or clips [6. One of the arms Ila is provided with a base lug l8 engaged tend into each of the sections thereof. by a terminal screw l9 beneath which the ends The invention also proposes a certain simple of the leads 26 are clamped. and ef?cient construction of the terminals and Prongs 2|] for engaging an electrical connector the prongs used in the fused electric plug. are mounted within other portions of said re Another object of the invention is the con cesses l4 and project from one of the ends of struction of a device as mentioned which is sim the casing E0. The inner ends of the prongs 26 ple and durable and which may be manufactured are spaced from the terminals I5 and are pro tively di?icult to detect. 'With the improved elec tric plug only a restricted portion of the house circuit, or other protected circuit, will be inter and sold at a reasonable cost. vided with clips 2| for receiving and holding the For further comprehension of the invention, to other ends of the fuses [1. Each prong 20 is and of the objects and advantages thereof, ref formed from a metal strip which is bent upon erence will be had to the following description itself to form adjacent arms, the free ends of and accompanying drawing, and to the append which are formed into clip portions or clips 2|. ed claims in which the various novel features of One of the arms of each prong 20 is formed with 55 a laterally offset portion 22 engaging within the invention are more particularly set forth. 2,406,154 3 4 complementary portions of the recesses l4. These offset portions 22 serve to hold the prongs 2!] from coming out of the casing ID. holding one of the ends of fuses mounted upon and within the recesses of one of said sections, and prongs for engaging an electric connector The recesses [4 of the sections II and I2 are mounted upon and within the recesses of said of equal depths, and are shaped or fashioned to section, each of said prongs comprising a metal hold the prongs 20 and the terminals I5 cen strip bent upon itself and having its ends within trally between the casing sections. The fuses II said section and separated and formed into clip are in the nature of fuse strips which are mere portions for holding the other end of one of said ly placed between the clip portions l6 and 2|. fuses, and one of the arms of each prong having The sections II and I2 of the casing II] are also 10 an offset portion engaging complementary por formed with recesses 23 in which extra fuse strips tions of said recesses for holding the prongs from H’ are normally stored. When the fuses I‘! blow, coming out. the electric plug may be re-fused by using the 2. In a fused electrical plug, a sectional cas fuse strips H '. ing of insulation material having its sections re The prongs 20 are resiliently maintained in 15 leasably connected together and having recesses one of the sections of the casing I0, namely the formed between their contacting faces, clips for section 12, by small projecting portions 25 formed holding one of the ends of fuses mounted upon in one of the corners between the offset portion and within the recesses of one of said sections, 22 and the adjacent arm of the prong, and and prongs for engaging an electric connector engage complementary recessed portions 26' 20 mounted upon and within the recesses of said formed in the section [2, half way down the re section, each of said prongs comprising a metal cess 14 thereof. Each recess 14 has a central en strip bent upon itself and having its ends with larged portion at the area where the fuses ll are in said section and separated and formed into located, forming a space with facilitates engage~ clip portions for holding the other end of one of ment and disengagement of the fuses, and which 25 said fuses, one of the arms of each prong hav also forms an air space useful when the fuses ' ing an offset portion engaging complementary blow. portions of said recesses for holding the prongs The fuses I‘! may be removed, and then the from coming out, and each prong having a small clip portions 2| of the prongs 20 may be pressed projecting portion engaging a complementary together so as to move the projecting portions 25 recessed portion of said recesses for holding the out of the recessed portions 26' which frees the prong on said section of said casing. prongs 20 so that they may be removed. 3. In a fused electrical plug, a sectional cas In Figs. 6 and 7 a modi?ed form of the inven ing of insulation material having its sections re tion is disclosed which is very similar to the leasably connected together and having recesses prior form, distinguishing merely in the fact that 35 formed between their contacting faces, clips for the terminals l5 are provided with clip portions holding one of the ends of fuses mounted upon l6’ and the prongs 20 are provided with com and within the recesses of one of said sections, plementary clip portions 2|’, which clip portions and prongs for engaging an electric connector are adapted to engage and hold fuses ll". These mounted upon and within the recesses of said fuses ll” are of the capsule type. section, each of said prongs comprising a metal In other respects this form of the invention is strip bent upon itself and having its ends with identical to the previous form and like parts are ing said section and separated and formed into identi?ed by like reference numerals. clip portions for holding the other end of one of While I have illustrated and described the pre said fuses, one of the arms of each prong having ferred embodiments of my invention, it is to be an offset portion engaging complementary por understood that I do not limit myself to the pre tions of said recesses for holding the prongs, from cise constructions herein disclosed and the right coming out, and each prong having a small pro is reserved to all changes and modi?cations com jecting portion engaging a complementary re ing within the scope of the invention as de?ned cessed portion of said recesses for holding the in the appended claims. prong on said section of said casing, said small Having thus described my invention, what I projecting portion being located near the clip claim as new and desire to secure by United end of the prong so as to be disengageable from States Letters Patent is: the complementary recessed portion when the 1. In a fused electrical plug, a sectional casing of insulation material having its sections releas together. ably ‘connected together and having recesses formed between their contacting faces, clips for arms of the clip end of the prong are pressed MILTON MEDLIN.