Improvements in Grips Used in the Laying of Underground Electrical Cables.
Year: 1899

page_text: Date of Application, 26th Aug., 1899
Complete Specification Left, 23rd Feb., 1900-Accepted, 14th Apr.,
1900
TRUVIDIUNAL DEVITICATION.
Improvements in Grips Used in the Laying of Underground Electrical
Cables.
We, THE STEEL NUT AND JOSEPH HAMPTON, LIMITED, of Franchise Street,
King's Hill, Wednesbury, in the County of Stafford, Manufacturers, and SAMUEL
HAMPTON, of Hollydene, Walsall Road, King's Hill, Wednesbury, aforesaid,
Works Foreman, do hereby declare the nature of this invention to be as follows:-
The said invention has reference to such grips as are used for pulling or
threading electrical cables through the underground tubes or protectors in which
the said cables are laid.
These grips, as ordinarily constructed, consist of a cylindrical or tubular base
slightly taper internally within which base the cable is gripped by two curved
wedges or wedge shaped clips operated by a sliding disc and screw above the
said tubular base, the said disc sliding upon two curved side straps rivetted at
opposite points in the interior of the tubular base. The two opposite straps
terminate at top in a cross head, in a screw box in which the screw described
works, the said screw having an eye for the attachment thereto of a rope or cord
for threading the cable, to which the grip is fixed, through the underground
tubes or protectors.
The base or cylindrical part of the clip is liable to distortion as during the
wedging action the figure of the base assumes somewhat the shape of an ellipse
and wedges or tightens in the tubes or protectors in which the cable is laid
and prevents the threading of the cable through the said tubes or protectors.
The object of this invention is to remedy in the following manner the defect
referred to.
Instead of using two curved straps rivetted at opposite points to the cylindrical
or tubular base of the grip and two curved wedges or clips for gripping the
cable between themselves and the tapering parts of the said straps within the
base, we use three equi-distant curved straps and three curved narrow wedges
or clips for gripping the cable. By this arrangement or construction the pres-
sure of the wedges or clips upon the tubular base in gripping the cable is dis-
tributed uniformly over the whole of the said base and the distortion herein-
before referred to effectually prevented.
Dated this Twenty-sixth day of August 1899.
5 Improvements in Grips Used in the Laying of Underground Electrical
Cables.
We, THE STEEL NUT AND JOSEPH HAMPTON, LIMITED, of Franchise Street,
King's Hill, Wednesbury, in the County of Stafford, Manufacturers, and SAMUEL
[Price 8d.]

page_text: HAMPTON, of Hollydene, Walsall Road, King's Hill, Wednesbury, aforesaid,
Works Foreman, do hereby declare the nature of the said invention and in what
manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
The said invention has reference to such grips as are used for pulling or
threading electrical cables through the underground tubes or protectors in which
the said cables are laid.
These grips, as ordinarily constructed, consist of a cylindrical or tubular base
slightly taper internally within which base the cable is gripped by two curved
wedges or wedge shaped clips operated by a sliding disc and screw above the
said tubular base the said disc sliding upon two curved side straps riveted at
opposite points in the interior of the tubular base. The two opposite straps
terminate at top in a crosshead, in a screw box in which the screw described
works, the said screw having an eye for the attachment thereto of a rope or cord
for threading the cable to which the grip is fixed through the underground
tubes or protectors.
The base or cylindrical part of the clip is liable to distortion as during the
wedging action the figure of the base assumes somewhat the shape of an ellipse
and wedges or tightens in the tubes or protectors in which the cable is laid
and impedes or prevents the threading of the cable through the said tubes or
protectors.
The object of this invention is to remedy in the following manner the defect
referred to.
Instead of using two curved straps rivetted at opposite points to the cylindrical
or tubular base of the grip and two curved wedges or clips for gripping the
cable between themselves and the tapering part of the base, we use three equi-
distant curved straps and three curved narrow wedges or clips for gripping the
cable. By this arrangement or construction the pressure of the wedges or clips
upon the tubular base in gripping the cable is distributed uniformly over the
whole of the said base and the distortion herein before referred to effectually
prevented.
Figure 1 of the accompanying drawing represents in elevation and Figure 2
in vertical section, a cable grip constructed according to this invention, Figure 1
showing the three curved equidistant wedges or wedge like clips in their raised
or non-gripping position and Figure 2 showing the said wedges or clips in their
advanced and gripping position for wedging the cable in the base of the grip;
Figures 3 and 4 represent horizontal sections of the same taken respectively
the dotted lines r, and y, y of Figure 2; Figure 5 represents in elevation the
grip before the cylindrical or tubular base is rivetted thereto and Figure 6 repre-
sents in vertical section the said base detached.
on
The same letters of reference indicate the same parts in the several figures of
the drawing.
a is the cylindrical tubular base of the grip taper internally (see Figures 2
and 6); b, b, b are the three equi-distant curved straps the lower parts 68, 68, 6º of
which are made taper and are rivetted to the taper interior of the said base a (see
Figure 4). The three equi distant straps b, b, b terminate at top in the cross
head 63 having a screw box b'; c, c, c are the three curved wedges or wedge like
clips toothed or notched on their inner gripping faces for gripping the end of
the cable passed into the base a when the said wedges are in the lowered or
advanced position represented in Figure 2. The said curved wedges 'c, c, c work
in the spaces in the base a between the lower parts 6º, 6º, 6º of the straps b, b, b
(as best seen in Figure 4) and the tops of the said wedges are provided with
heads for the sliding disc d to bear against (see Figure 2). The said disc d has
in its edge three equi distant openings to permit it to slide upon the equi distant
straps b, b, b (see Figure 3). The disc d is raised and lowered by the screw e
swivelling..ate in the said disc. The said screw works in the screw box b' in

page_text: the cross head 63 of the straps and has an eye at top for the attachment thereto
of a rope or cord for threading the cable to which the grip is fixed through the
underground tubes or protectors. When the disc d and wedges c, c, c are out
of action or in the positions represented in Figure 1 the base of the grip is clear
for receiving the end of the cable. By rotating the screw e so as to lower the
disc on the guiding straps b, b, b the wedges c, c, c are advanced into the
internally tapered base a (as represented in Figure 2) thereby closing the said
wedges upon the cable and securing it firmly in the grip. By raising the screw e
the pressure of the wedges on the cable is relaxed and the grip may be removed
from the cable.
By the use of a cable grip provided with three equi distant straps and three
equi-distant curved wedges working in the internally taper base of the grip the
pressure of the wedges or wedge like clips upon the tubular base in gripping
the cable is uniformly distributed over the whole of the said base and the dis-
tortion of the base thereby prevented.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that we
claim as the said invention of improvements in grips of the kind hereinbefore
described used in the laying of underground electrical cables: -
Providing the cylindrical or tubular base of the clip with three equidistant
curved straps rivetted at bottom to the taper interior of the said base and carrying
at top the usual cross head and screw box and the use with the said equidistant
curved straps of three curved wedges or wedge like clips arranged and working
between the said equidistant curved straps substantially as hereinbefore described
and illustrated in the accompanying drawing whereby the pressure of the said
wedges or wedge like clips upon the tubular base on gripping the cable is dis-
tributed uniformly over the whole of the said base and the distortion of the said
base effectually prevented.
Dated the Twenty third day of February 1900.
W. T. WHITEMAN,
Agent for the Applicants.