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Publication numberUS2107835 A
Publication typeGrant
Publication dateFeb 8, 1938
Filing dateJul 31, 1935
Priority dateJul 31, 1935
Publication numberUS 2107835 A, US 2107835A, US-A-2107835, US2107835 A, US2107835A
InventorsFred Pierce Milo
Original AssigneeWestern United Gas And Electri
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ground rod connecter
US 2107835 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 8, 1938. M. F. PIERCE GROUND ROD CONNECTER Filed July 51, 1955 llll IL I I H I HU I HHTIIIII IL llllllllll Patented Feb. 8, 1938 I UNITED STATES PATENT OFFICE GROUND ROD CONNECTER Milo Fred Pierce, Aurora, 111., assignor to Western United Gas and Electric Company, Aurora, 111., a corporation of Illinois Application July 31, 1935, Serial No. 34,056

2 Claims. (Cl. 173-31) y inVentiOn relates t ground rod connecters tures D and E respectively, which extend through of the type used for the purpose of electrically the collar and into which the conductors to be connecting a conductor to a ground rod. joined are inserted. In the present structure,

One of the objects of my invention is to protheapertures D and E are of different diameters 5 vide a device of this character in which the electo correspond to the different diameters of the trical contact between the conductors is accomconductors, and one opens into the other so that plished by actually bringing about the embedding the conductors are actually in contact with each of the metal of the connecter in the conductors other at F. to be connected under the force of considerable The apertures D and E are preferably larger pressure so that the connection will be of low than the conductors, principally for the purpose l0 resistance, will remain uniform, and will not be of freely inserting or removing the conductors. subject to corrosion. The walls of these openings or apertures are Another object is to provide an inexpensive parallel with the conductors, although this is not connecter requiring no special tools for its innecessary but is preferably from a manufacturing stallation and capable of ready removal and restandpoint. l5 peated use. The conductors are forced into contact with Other objects of the invention will appear from each other by the connecter and a tapered pin or the following description and claims by reference a wedging device G which extends through anto the accompanying drawing which illustrates other aperture H in the collar and which forms a one embodiment of the invention. seat for the tapered wedging member G. The 20 Referring to the drawing, wall of the seat is accordingly tapered or ar- Fig. 1 is a view in elevation of a ground Wire ranged at an angle corresponding to the taper of and ground rod in assembled relation, and conthe wedge member, as shown more clearly in Figs.

nected by means of my device; 2 and 3. The tapered side of the wedging mem- Fig. 2 is a transverse section on the line 2--2 of her is transversely curved to conform to the seat 25 Fig. H, but the opposite side J is preferably flat so as to Fig. 3 is a vertical section substantially on the bear against the ground rod as shown. line 3-3 of Fig. 2; After the conductors are inserted in the collar Fig. 4 is another vertical section at right angles in position to be connected, the wedging member on the line 44 of Fig. 2; is inserted in its seat and driven therein by means 30 Fig. 5 is a detail of the upper end of a ground of a hammer or other suitable tool. The wedgrod illustrating the manner in which the coning action of the wedging member causes the connecter metal is embedded in to the metal of the ductors to be drawn into contact with a relatively ground rod; and great force. While electrical contact is neces- Fig. 6 is a similar View of the ground wire sarily made between the collar and conductor by 35 illustrating the same contact. virtue of the intimate engagement which the In the drawing, A represents the end portion of wedging member has with the collar and ground a typical ground rod generally driven or sunk into rod, I do not rely upon this engagement for perthe ground for electrical purposes; and B reprefecting electrical connection. Surface contacts sents the end portion of a wire or conductor of this character have in the past not proven 40 adapted to be electrically connected to the satisfactory, being subject to corrosion and lack ground rod. of constancy. In addition, I provide knife edge While these conductors are of relatively difiercontacts wherein the metal of the collar becomes ent diameters and are circular in cross-section, it actually embedded in the metal of the conductors.

is understood, of course, that they may be of any This is accomplished by a number of ribs or pro- 5 diameter and cross-section in shape, and that jections on the walls of the apertures so arranged the shape of the connecter may be conformed that when the wedging force is applied to the thereto. collar, these ribs will actually pierce the metal of The connecter embodied in my invention and the conductors and become embedded therein.

illustrated in the drawing involves a band or In the present structure the wall of the aperture 50 collar 0, preferably in the form of a closed loop, E has an instanding rib K extending the length of adapted to embrace or surround the conductors the aperture and preferably positioned in dito be connected. The collar member is preferametrical alignment with both conductors. In ably made of hard brass or other suitable nonlike manner the wall of the aperture D is procorrosive material. It has two openings or apervlded with similar ribs L positioned on either side 55 of the diameters of the conductors. These ribs are integral with the collar and are preferably triangular shaped in section so that sharp knife edges are formed. The force provided by the wedging member causes the knife-edged ribs to actually pierce and deform the metal of the conductors to the extent of forming grooves M therein, as shown in Figs. 5 and 6. The projections thus actually become embedded in the metal of the conductors and the electrical contact formed thereby becomes so intimate and effective that it has proven immune to the entrance of corroding factors and has remained constant and uniform through long periods of time.

The connecter may be readily removed at any time by driving out the wedging member, and may be repeatedly used because of the fact that none of the parts become damaged or distorted.

While the structure shown is conformed to conductors of different diameters, it is obvious that the diameters of the conductors, the shape of the collar, and its recesses or apertures, and the number of ribs, may be varied without departing from the spirit of the invention, and I contemplate such changes as may fairly fall within the scope of the appended claims.

I claim:

1. In a ground rod connecter of the class described, the combination of a ground rod and a conductor to be connected therewith adapted to be positioned in contact with and at one side of the ground rod, a closed band surrounding the ground rod and conductor and having intersecting apertures therethrough for said ground rod and conductor, said apertures having knifeedged ribs instanding from their walls, said band having a recess forming a. tapered seat at the side of the ground rod opposite said conductor, and a removable tapered wedge member seated in said tapered seat and adapted to be driven between said seat and said ground rod to force said ribs to pierce the metal of the ground rod and conductor and become embedded therein.

2. As an article of manufacture, a. ground connecter comprising a single piece of metal formed as a closed loop and having a central aperture therethrough and a different sized intersecting recess at one side thereof to accommodate the electrical conductors to be connected, and longitudinal integral knife edge ribs on the walls of said aperture and recess in position to engage the conductors, the wall of said aperture also having a tapered recess on the opposite side of said central aperture to accommodate a wedging member between said tapered portion and the conductors.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2649647 *Aug 25, 1949Aug 25, 1953West Shore Mfg CoToolholder
US2742533 *May 15, 1951Apr 17, 1956North Electric CoWedge lock to multiple
US2994850 *Nov 22, 1957Aug 1, 1961Jaeschke Herman PElectrical connector clamp
US3060257 *Feb 2, 1961Oct 23, 1962Anderson Electric CorpCombination driving point and compression connector for ground rod and ground conductor
US3191139 *Feb 19, 1962Jun 22, 1965Alois SchiffmannTap connector and setscrew therefor
US4047907 *Nov 26, 1975Sep 13, 1977Ab Svenska FlaktfabrikenDust separator apparatus
US4215911 *May 25, 1979Aug 5, 1980Amp IncorporatedBattery terminal for telephone storage batteries
US4271917 *Apr 9, 1979Jun 9, 1981Syndrill Products Joint VentureLocking device for hard metal inserts
US4639950 *Nov 1, 1984Feb 3, 1987Leif PalmaerMethod of and means for holding a securing member in an existing attachment slit
US4712557 *Apr 28, 1986Dec 15, 1987Cordis Leads, Inc.A pacer including a multiple connector assembly with removable wedge and method of use
US4754542 *Jan 30, 1987Jul 5, 1988Westinghouse Electric Corp.Process of fabricating spar-type consumable electrode for vacuum arc melting of zirconium or titan alloys with wedged-on segment
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US5661932 *Apr 15, 1996Sep 2, 1997Barefield; David H.Post anchor and method of installing a post
US5672065 *Apr 22, 1996Sep 30, 1997Womack; Robert R.Ground rod connecting device
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US6048233 *May 11, 1998Apr 11, 2000Mainstream Engineering Corp.Retrofit arrangement for attaching leads to compressor motor terminals
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US7543529May 13, 2005Jun 9, 2009Wood Stone CorporationVertical rotisserie cooking system
US8387518Apr 30, 2009Mar 5, 2013Wood Stone CorporationVertical rotisserie cooking system
US20040132356 *Dec 16, 2003Jul 8, 2004E & J Demark, Inc.Electrical connector
US20130172714 *Jan 4, 2012Jul 4, 2013Medtronic Xomed, Inc.Clamp for securing a terminal end of a wire to a surface electrode
USD486791Jan 29, 2003Feb 17, 2004Senior Industries, Inc.Ground block
USD487427Jan 29, 2003Mar 9, 2004Senior Industries, Inc.Ground block
DE2839898A1 *Sep 13, 1978Mar 22, 1979Elteknik Ab F SVerfahren und vorrichtung zur erdung
U.S. Classification439/100, 439/387, 403/374.2, 174/7, 403/396, 439/863, 439/790
International ClassificationH01R4/50, H01R4/66
Cooperative ClassificationH01R4/66, H01R4/5083
European ClassificationH01R4/66, H01R4/50W