Патент USA US2111799код для вставки
22, 1938., c. NEWPHER 2911119799 GROUND CONNECTION Filed Nov. 5, 1936 .l 1 v/@ | i ‘ BY INVENTOR. MWVX ‘ ATTORNEY. ’ Patented Mar. 22, 1938 - 2,111,799 I " " [mm ‘STATES / . . _ PATENT OFFICE 2,111,799 GROUND CONNECTION Charles F. Newpher, Shaker Heights, Ohio, as ‘Signor to Republic Steel Corporation, Cleve land, Ohio, a, corporation of New Jersey Application November 5, 1936, Serial No. 109,278 4 Claims. (o1. 173-31), This invention relates broadly to electrical '_ ground connectors and more speci?cally to a sleeve and rod construction which is adapted to facilitate the use of rods of relatively short length to secure an assembly which will provide an e?ec~ tive electric ground connection. In the installation of apparatus for supporting high tension wires, it is necessary to provide ground connections at various points along the 10 lines in order to permit transmission of static electricity and also to ground the poles or sup porting structure in case the apparatus is struck by lightning. In forming the ground connec tion, the workman making the installation is often forced to use a rod of considerable length before an e?icient ground connection can be obtained. Since the workman is unable to anticipate the proper length of the rod at the beginning of such operation, it has been found necessary to use rods of substantial length, but such prac= tice usually entails theme of‘ scaffolding. To avoid such practice various expedients have been employed to connect short lengths of rod and progressively connect the same with pipe nipples or threaded couplings. This practice is objec tionable since the threads must be preserved dur all the various objects are realized will appear in the following description which, considered in connection with the accompanying drawing, sets forth the preferred embodiment of the inven tion. Referring to the drawing: Fig. l is an elevational'view of an electric wire supporting structure or pole and illustrates the improved ground connection asqgdriven in the earth; " _ Fig. 22 is a detailed view shown on an enlarged 16 scale illustrating the ground rod connected with the base of an electric tower; Fig. 3 is a longitudinal section through the coupling member and a pair of rods connected id thereby; and Fig. 4 is a transverse section through the ' coupling illustrated in Fig. 3, the sectionlbeing taken3. on the plane indicated by line ?-wit As illustrated. in 1, the ground ccnneow tion comprises a plurality of rod sections it united by the coupling members ii, the last sec~= tion of which extends slightly above the earth's surface. while the leading section may be pointed to facilitate the driving of the assembly into the ing shipment and further, the impact tools used ground. The lead cable or ground line it and in sinking the rod sections into the earth, upset clamp 63 therefor may be of any well known or or multilate the ends of the sections rendering desired type, such for instance as the U~bolt them un?t for use. shown in Fig. 2 and the wire or bus-bar shown: 30 The present invention contemplates a rod in Figs. 1 and 2 respectively. coupling which is adapted to envelop the end of ‘ As illustrated in Figs. 3 and 4i the end portions the rod which has been driven in the ground and id of the rods it are formed with longitudinal effect an automatic connection with the second serrations or teeth which may be of suitable length of rod which may be superposed thereover height relative to the diameter or" the bores it and driven down in the same manner as the ?rst in the end portions of the sleeve to deform and rod section. It will be understood that any mun ber of rod sections may be‘added, in the manner , just described, until a sufficient depth has been 40 attained to eifect a suitable grounding connec tion. The coupling member as herein contemplated may also be utilized as a driving head for receiv ing the impacts of the pneumatic hammers em 45 ployed in sinking the rod section into the earth. A suitable adapter may be provided which will abut the end wall of the bore in the coupling thus eliminating any mutilation or upsetting of the rod end or coupling. 50 I Another object and advantage of the invention resides in the construction of the rod and im proved coupling which is economic of manufac tlire, sturdy and durable. Other objects and advantages moreor less an 55 cillary of the foregoing and the manner in which out key-ways therein as the rods are driven to» gether, or which may be formed for frictional engagement within broached openings of com plemental form in the ends of the sleeves ii. _ The extreme end portions of the rod are pref= erably formed with a shank i1 and a rounded end face iii in order to effect proper engagement with the end wall or bottom of the bore it. The shank or reduced end portion ii is also provided to prevent mutilation of the serrations [5 during .the driving operation and to assure the entry of the rods with the couplings as they are successive ly added to the assembly while being driven into the ground. It will be readily recognized that the provision of the serrations IE will increase the ' area and thus assure a suitable electrical connec ticn and without loss of rigidity of structure. Moreover the coupling will facilitate an installa tion which may be expeditiously effected by one 2 , , » ' 2,111,799 z, _ individual and without help, since the rod sec- tudinal serrations mam-mam effective electrical tions may be made relatively short and may be quickly united without the use of tools during connection between the coupling and rod when the rod'lengths are driven into the ground. 2. A ground connection for electrical appara tus comprising a plurality of relatively short lengths ‘of rod, longitudinal teeth adjacent the ends thereof, a coupling comprising a body having the installation ‘of the ground connection. When the ‘removal of the rod and‘ sleeve as sembly is contemplated, which is necessary in the event some hard substance such as rock is struck before reaching su?icie'ntdepth to insure an effec < longitudinal bores in the end portions thereof, tive grounding connection, the engagement- of the longitudinal teeth in said bores of complemental con?guration with the teeth in said rod and in 10 10 serrations within ‘the end portions of the sleeve are . interlocking frictional engagement therewith. made to effect a relatively tight or drive ‘?t, the 3. A ground connection for electrical appara form of construction in. which the serrations of the rod ll constitute the broaching element to cut the grooves in the bore of the sleeve, being a pref 15 erable type of connection for this purpose. Although the foregoing description is neces _ sarily of a detailed character, in order that the invention may be'completely set forth, it is to be understood that the speci?c terminology is not in '20 tended to be restrictive or con?ning, and that vari tus comprising a plurality of relatively short lengths of rod, longitudinal serrations adjacent the ends thereof, coupling members for joining said rods, said coupling members comprising a body having longitudinal bores in the opposed ends thereof, serrations in said bores, said bores and serrations being proportioned relative the serrated portion of said rods to effect a frictional engage 20 ment therebetween, whereby said rods’ may be detail may be resorted to without departing from , successively assembled into an effective electrical the scope} or spirit of the invention as herein conductor by- superposing said couplings on said rods and driving said rods into said couplings. 4; A ground connection for electrical apparatus 25 ‘ I claim: ' 1. A ‘ground connection for electrical appara ”‘ comprising a plurality of rod lengths, said rod ‘ tus comprising a plurality of lengths of rod, said lengths having longitudinal serrations on their contiguous extremities, acoupling for uniting said rod lengths having longitudinal serrations ad jacent the ends thereof, a shank portion at the rods, said coupling having bores in the end por 80 outer ends of said rods, a coupling for uniting tions thereof of less diameter than the diameter 30 of the serrated portion of the rod, whereby when said rods, said coupling embodying a sleeve hav ing bores in the end portion thereof and end walls the rod lengths are driven into the ground with for abutting engagement with the shank and end the coupling therebetween the serrated ex~ portions of said rod, said bores being formed to tremities unite with the coupling and provide an 35 e?fective electrical connection therebetween. ‘receive the serrated portions of said rods and re > CHARLES F. NEWPHER. tain the same in frictional engagement, the longi ous rearrangements of parts and modi?cations of claimed. ‘ '