Патент USA US2042398код для вставки
May 26, 1936. ¢_ ,__ HILE 2,042,398 ELECTRIC CONTACT PLUG Filed April 19, 1955 I a \V 26 Patented May 26, 1936 2,042,398 UNITED. STATES PATENT FFlQE 2,042,398 ELECTRIC CONTACT PLUG Charles L. Hile, Louisville, Ky., assignor of one half to William Ruedeman, Louisville, Ky. Application April 19, 1935, Serial No. 17,343 2 Claims. This invention relates to certain new and use ful improvements in electric contact plugs. The primary object of the invention is to pro vide an electric contact plug of the type employed I5 in connection with electric sad irons, toasters, heaters and the like for attachment to terminals for the conduction of electricity. In attachment plugs of the foregoing char acter, two contacts are usually employed and are 10 of the spring type for engagement with two ter minals and the interior of the plug casing be comes highly heated and hastens disintegration of the casing body and wear on the contacts. It is therefore an important object of this invention 15 to provide for a thorough ventilation of the plug by disposing the conductor wires in spaced rela tion at their points of entry into the plug casing and to utilize the usual resilient plug pulling de vice as an air ventilating passage for the circula 20 tion of air into and through the plug casing, and for anchoring the conductor wires. ' A still further object of the invention is to provide a contact plug of the foregoing character wherein the electric wires that are attached to the 25 contacts are spaced from each other within the plug casing and pass outwardly of the casing at spaced points respectively opposite the longitudi nal axis of the‘casing so that liability of the wires touching each other within the casing is 30 eliminated. With the above and other objects in View that will become apparent as the nature of the inven tion is better understood, the same consists in the novel form, combination and arrangement of 35 parts hereinafter more fully described, and then claimed. In the drawing: Figure 1 is a side elevational view of an elec tric contact plug constructed in accordance with 40 the present invention, showing the conductor wires separated at their points of passage from the plug casing; Figure 2 is a plan view of the plug with one casing section removed and showing the spaced 4. relation of the spaced conductor wires within the casing and the unobstructed air passage from the casing through the resilient plug pulling de vice; 50 Figure 3 is a side edge elevational view of the Plug; Figure 4 is an outer end elevational view of the resilient plug pulling device; Figure 5 is a detail sectional view taken on line 55 5_5 of Figure 3; (Cl. 1'73—332) Figure 6 is a detail sectional view taken on line 5-6 of Figure 3; and Figure 7 is a plan View of one of the casing sections with the contacts removed and showing the lateral passages for the conductor wires. Referring more in detail to the accompanying drawing, there is illustrated an electric contact plug of the conventional exterior con?guration and comprising sections lb of identical construc tion mating to form the casing and secured to- 10 gether by the usual transversely extending counter-sunk nut and bolt combinations ll. Each casing section I0 as shown in Figure 7 has a raised central longitudinally extending rib l2 providing lateral grooves l3 for the reception of the usual contacts I4 and each groove l3 has cross ribs l5 rising from the bottom walls there-v of to space the contacts I4 from the walls of the casing ID. The ribs l2 have openings I6 therein through which the bolts l I pass. The inner end of each casing section I0 is provided with a semi-circular channel I‘! with the two channel sections- mating to form a cir cular channel for the reception of one end of the resilient plug puller. The semi-circular channels 11 are spaced from opposite side edges of the casing section II] and the inner end wall of the casing section between each end of the semi circular channel IT and the side edge of the cas ing section is cut away as at Hi to provide a passage for the conductor cord. A diagonally extending rib [2a is disposed adjacent each cut away portion “! and the inner end of the rib terminates in spaced relation to the longitudi nal rib l2 to provide an air passage or vent I2b. As shown in Figure 2, the contacts M are seated in the. respective grooves I 3 and the conductor cords l9 are anchored as at 20 to the respective 15 20 25 30 35 contacts I 4, the conductors respectively passing through the cut away portions l8 and being en- 40 tirely separated from each other within the plug casing and at their points of passage from the casing and exteriorly thereof. The resilient plug pulling device comprises a tubular coil spring 21 having a ring 22 at one 45 end thereof removably received in the channel sections I‘! to be locked in said sections when the casing sections are secured together. The other end of the tubular spring 2! is anchored in the pull handle 23 as shown in Figure 6 and said pull 50 handle is provided with a cross head 24 out wardly of the tubular portion 25 to which the spring is anchored. The cross head 24 of the pull handle is of channel formation as shown in Figures 4 and 6 and the tubular portion 25 there- 55 2,042,398 V 725,‘, of’ opens into the cross head to’ provide an unob structedair passage from the interior of the plug > > casing to the tubular coilspring'2l and pull han . 1. In'an electric contact plug of the character’ 7 described, a plug body formed of sections having spacer ribs and ventilator openings therein, a a 1 dle.» A transverse opening 26 is formedin'the pair of contacts therein, a tubular plug pullerlate ' channel shaped cross head 24 and the two con ,tached toone end thereof and including a’ coil’ ductor wires 29' may be brought together, passed through and anchored in the opening'26 and at a convenient point attached to a: plug or other _ source of electrical energy. ' spring having one end anchored to the body and, a transversely extending puller head at itsxouterir end, the puller head having an opening extendé ing transversely thereof, said plug puller being ‘in . From the above detailed description of the in; open communication with the plug body to' ef-n 10w ventioni it is believed that the construction and frect ventilation of the latter and'conductor wires P use thereof will at oncebe apparent, it being attached to the contacts and passing from the noted" thatrthe' conductor wires are completely plug body in spaced relation to each other and at opposite sides of the plug puller and ,freely pass 7 separated from each other within the plug cas 15 ing, thereby eliminating the blowing of fuses and ing in juxta-posed relation through the trans 15; .10 the burning of wires while a thorough ventilation of the plug is possible by directing the conductor wires from the plug casing exteriorly of the tubu ,lar' resilient plug puller so that air may freely 20 circulate through the plug puller into the plug casing. It is also to ‘be understood that the re silient plug puller that is directlyattached to the plug body relieves’ all strain on the conductor wires and liability of the wires being pulled loose from the contacts is eliminated.’ ‘ 7 'While there is herein shown and described the preferred embodiment of the invention, it is nev ertheless to be understood that minor changes may be made therein without departing from the 30 spirit and scope of the invention as claimed. I claim :— 7 ~ verse opening in the outer end of the puller head. 2. In an electric contact plug of the character described, a plug body, a pair of contacts there in, a tubular resilient plug puller attached to'the plug body, conductor wires attached to the con 20 tacts, spaced from each other within the plug body and passing from the plug body respectively at opposite sides of the plug puller and the outer end of the plug puller having an opening there- '25 in through which the conductor wires are passed with su?icient slack present in the conductor wires at opposite sides and exteriorly of the plug puller whereby strain on the wires is relieved 7 during the pulling of the plug. 7 r ' CHARLES LlHILE. ' '