Патент USA US2408278код для вставки
Sept. 24, 1946. 2,408,276 c. J. sHRADER ELECTRICAL GROUND CLAMP Filed March 51, 1943 /////////// ///////r ////// //// ' /////////// l,7/ /4 w C halmdn John VSh‘rader l . INVENTOR ,By ATTORNEY Patented Sept. 24, 1946v 2,408,276 UNITED STATES PATENT oEFICE Chalmon John Shrader, Henrico County, Va. Application March 31, 1943, Serial No. 481,367 B'Claîms.> ' (Cl. 173-273) This invention relates to electrical ground clamp or connections and more particularly to arc Welding connections. One of the objects of this invention is the pro vision of a clamp adapted to be connected to various sizes of conductors. y 2 4--5 open and may be closed upon said metal thus securing the device to the metal in electri-‘ cal circuit. ` To secure the device, for instance, inside an angular metal bar C, members I and 2 are pulled against spring tension and contacts II--I2 move toward each other and may be inserted in tube Another object of this invention is the provi sion of an adjustable clamp. , and electrical contact thus made; as illustrated Other objects and features will more fully ap pear from the following description and accom 10 which current passes through conductor A from panying drawing, in which: generator B, through the angular bar C and de Fig. 1 is a vertical side View; Fig. 2, a sectional portional side view; Fig. 3, a top plan view, and Fig. 4, an electrical circuit. in the schematic electrical diagram of Fig. 4, in ` Y vice and returning to the generator via conduc tor I8. . Magnetic Iblocks 20y are respectively secured to Referring to the drawing, an angular male 15 members I-2 and adapted to hold the device in member I is disposed in slidable fashion in an a iixed position against any material that is at angular-female member 2 and is provided with tracted by said blocks. ' a ball and socket joint l3 to which is connected Having described this invention, what is a contact 4. claimed is: A contact 5, similar to 4, is connected to a ball 20 1. In an electrical connector, a tubular mem and socket joint 6 disposed in one end of a rod 'ber having a slot through its side wall longitudi 'I slidable through end 8 of the female member nally of said member, a hollow elongated mem 2, and adapted to lbe secured by a lock-nut 9. ber, a contact mounted on said member and eX Contacts 4 and 5 are held together by a spring tending through said slot, a tension spring within I0; the ends o1' which are respectively secured to 25 said hollow member having its ends secured to members I and 2. said members slidably ñtting within said tubular A contact member l I is secured near one end member, each of said members having an arm of member I While a contact I2 is disposed near rigidly extending laterally from the free end one end of member 2 as shown in Fig. 1. Con thereof, a first gripping element mounted upon tact member II engages slot I3 throughout its 30 the free end of one arm, a rod connected with length to prevent circumferential displacement the free end of the other arm for adjustment with respect to members I and 2. Welding of toward and from said element, means for secur member II to sleeve I through slot I3 of member ing said rod and its arm in adjusted position, and 2, may be accomplished by applying one termi , a second gripping element mounted upon the end nal of a source of current to sleeve I through such 35 of said rod adjacent said i’irst element. slot and the other terminal of the source to 2. In a connector as dei-ined in claim 1, eac-h of member II, thereby completing a circuit and ef fecting the welding of member II to sleeve I, in the manner well known in the resistance welding said gripping elements being universally pivot ally mounted upon said one arm and rod. 3. In an electrfical connector, a tubular mem art. Furthermore, it is obvious that the shank 40 ber, having a slot through its side wall longitu of part II may -be circular and have its end dinally of said member, a hollow mem-ber tele threaded to engage a correspondingly threaded scopically ñtting said tubular member, a tension hole in sleeve I. spring within said hollow member and having its Female member 2 is provided with a toothed end I4 adapted to scrape rust and non-conduct ends secured to said members, respectively, a first clamp element having a shank extending through said slot and there secured to said hollow mem a swiveled hook I5 having a pair of resilient legs ber, a second clamp element having a shank se IS-I‘I is adapted for being clamped to the de cured to said tubular member adjacent its end vice at any suitable point so that said hook may receiving said hollow member, a parallel arm be secured to an object and thus support the de 50 projecting laterally from the free end of each of ing materials from a conducting material; while v1ce. An electrical conductor I8 is connected to male ` member I and adapted to conduct electrical cur said members, a rod mounted on one said arm for adjustment toward and from theV other arm, means carried by said arm and securing said rod ' . in adjusted position, and cooperating contact ele It is obvious from the foregoing that if a piece 55 mentsA universally pivoted upon said other arm of metal is to be welded then by pulling members and an end of said rod. I and 2 apart, against spring tension, contacts CHALMON JOI-IN SHRADER. rent.