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Патент USA US2111799

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22, 1938.,
c.
NEWPHER
2911119799
GROUND CONNECTION
Filed Nov. 5, 1936
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BY
INVENTOR.
MWVX
‘
ATTORNEY.
’
Patented Mar. 22, 1938
- 2,111,799
I " " [mm ‘STATES
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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;
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_
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
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,
»
' 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.
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