Improvements in Metallic Telegraph Poles.
Year: 1889

page_text: Date of Application, 15th Mar, 1889
- ·Complete Specification Left, 16th Dec., 1889-Accepted, ·8th 'Mar.,
1890
PROVISIONAL SPECIFICATION.
Improvements in Metallic Telegraph Poles.
I, WILLIAM FREDERICK DENNIS, of 11, Billiter Street, in the City of London,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to telegraph-poles of the kind in which the upper portion of
the pole consists of a wrought metal taper tube, whilst the lower portion is composed
of cast metal and is either partially driven into or buried in the ground; my invention
consisting in improved means for fastening the wrought metal polo to the cast
metal pedestal.
In attaching the wrought inetal pole to the cast metal pedestal according to my
improved method, I form the lower extremity of the pole with a conical enlargement
which fits freely about a conical spigot end wherewith the upper extremity of the
pedestal terminates.
At the base of the conical spigot, the pedestal is provided with a shoulder whereon
the bottom edge of the tube rests. Surrounding the conical portions of the tube
and pedestal and extending a certain distance downwards is a junction-ring
whereof the upper portion is internally coned to fit the exterior of the wrought
metal tube and whereof the lower portion is internally provided with an inclined
groove or screw-thread. The groove is provided with an opening from bolow to
admit of the junction-ring being applied over a projection or stud wherewith the side
of the pedestal is formed or furnished. The exterior of the junction-ring is hexagonal
or is otherwise adapted for enabling the same to be turned by means of a spanner
or equivalent appliance.
In erecting a telegraph-pole constructed as hereinbefore described, the cast metal
pedestal having been buried or driven into the ground to the requisito depth, the
wrought metal pole is mounted thereon, its lower extremity surrounding the conical
spigot forming the upper extremity of the pedestal. The junction-ring is then slipped
down to embrace the joint, the projection or stud upon the side of the pedestal entering
the inclined groove in the junction-ring. Upon the latter being rotated, it is drawn
downwards by the action of the groove upon the stud until the upper or conical
portion of the junction-ring engages with and grasps the conical and enlarged
extremity of the wrought metal pole, the latter being thus firmly secured to the cast
metal pedestal.
Between the outer surface of the pole and the inner surface of the junction-ring,
I prefer to insert a wrapping of lead, asbestos millboard or other comparatively
yielding material with a view to ensuring an equal distribution of pressure without
turning and boring the adjacent surfaces referred to. Between the bottom edge
of the pole and the shoulder herein before referred to as formed upon the pedestal,
there may likewise be interposed a washer of suitable yielding material.
It will be obvious that instead of the inclined groove being formed in the
junction-ring with an opening from below as hereinbefore described, the groove may
be formed in the outer surface of the cast metal pedestal and have an opening from
above to admit a projection or stud formed or provided upon the junction-ring.
The cast metal pedestal may be hollow and terminate in a solid bottom, the top
being open for the admission of a rammer whereby the base is driven into the ground
in the usual manner.

page_text: COMPLETE SPECIFICATION.
Improvements in Metallic Telegraph Poles.
I, WILLIAM FREDERICK DENNIS, of 11, Billiter Street, in the City of London,
Mechanical Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:—
This invention relates to telegraph-poles of the kind in which the upper portion
of the pole consists of a wrought metal taper tube, whilst the lower portion is com-
posed of cast metal and is either partially driven into or buried in the ground; my
invention consisting in improved means for fastening the wrought metal pole to the
cast metal pedestal.
In the accompanying drawings, Fig. 1 represents in side elevation and Fig. 2 in
vertical section a metallic telegraph-pole constructed in accordance with my invention;
Fig. 3 being an enlarged view partly in elevation and partly in section shewing in
greater detail the improved means employed for fastening the pole to the pedestal.
In attaching the wrought metal pole a to the cast metal pedestal according to
my improved method, I form the lower extremity of the pole with a conical enlarge-
ment a¹ which fits freely about a conical spigot end wherewith the upper extremity
of the pedestal terminates. At the base of the conical spigot, the pedestal is provided
with a shoulder whereon the bottom edge of the tube a rests. Surrounding the
conical portions of the tube and pedestal and extending a certain distance downwards
is a junction-ring c whereof the upper portion is internally coned to fit the exterior of
the wrought metal tube, and whereof the lower portion is internally provided with an
inclined groove or screw-thread c¹. The groove is formed with an opening (not
shewn in the drawings) which extends to the bottom of the ring c in order to admit of
the ring being applied over a projection or stud 63 on the side of the pedestal. The
exterior of the junction-ring c is hexagonal or is otherwise adapted for enabling the
same to be turned by means of a spanner or equivalent appliance.
In erecting a telegraph-pole constructed as hereinbefore described, the cast metal
pedestal having been buried or driven into the ground to the requisite depth, the
wrought metal pole a is mounted thereon, its lower extremity a¹ surrounding the
conical spigot b forming the upper extremity of the pedestal. The junction-ring c is
then slipped down to embrace the joint, the projection or stud 63 entering the inclined
groove c¹. The ring, upon boing rotated, is drawn downwards by the action of the
groove and stud until the upper or conical portion of the junction-ring engages with
and grasps the conical and enlarged extremity a¹ of the wrought metal pole, the pole
being thus firmly secured to the cast metal pedestal.
Between the outer surface of the pole and the inner surface of the junction-ring, I
prefer to insert a wrapping of lead, asbestos millboard or other comparatively yielding
material with a view to ensuring an equal distribution of pressure without turning
and boring the adjacent surfaces referred to. Between the bottom edge of the pole
and the shoulder there may with the same object be interposed a washer of suitable
yielding material.
It will be obvious that instead of the inclined groove being formed in the junction-
ring with an opening from below as hereinbefore described, the groove may be formed
in the outer surface of the cast metal pedestal and have an opening from above to
admit a projection or stud formed or provided upon the junction-ring.
The cast metal pedestal inay be hollow and terminate in a solid bottom, the top
being open for the admission of a rammer whereby the base is driven into the
'ground in the usual manner.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim
-
1. The improved metallic telegraph-pole constructed substantially as herein described,
and having the wrought metal pole secured to the cast metal pedestal by means of

page_text: junction-ring embracing the joint and so formed that, upon the ring being rotated,
the upper and lower members of the pole are drawn together and firmly secured.
2. For fastening the pole to the pedestal of a metallic telegraph-pole, the employ-
ment of a junction-ring provided internally with an inclined groove for engaging with
a stud or projection upon the pedestal and having also a conical part for engaging
with the enlarged conical extremity of the pole, a rotative movement of the ring
operating to tighten the parts together.
3. For fastening the pole to the pedestal of a metallic telegraph-pole, the employ-
ment of a junction-ring provided internally with a stud or projection for engaging
in an inclined groove formed upon the pedestal, and having also a conical part for
engaging with the enlarged conical extremity of the pole, a rotative movement of the
ring operating to tighten the parts together.
Dated this 3rd day of December 1889
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.