IMPROVEMENTS IN TUBULAR WROUGHT-IRON TELEGRAPH POSTS
Year: 1860

page_text: LETTERS PATENT to John Hamilton, Jun'., of Liverpool, in the County
of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN TUBULAR
WROUGHT-IRON TELEGRAPH POSTS."
Sealed the 14th May 1861, and dated the 20th November 1860.
PROVISIONAL SPECIFICATION left by the said John Hamilton, at the
Office of the Commissioners of Patents, with his Petition, on the 20th
November 1860.
I, JOHN HAMILTON, Jun., of Liverpool, in the County of Lancaster,
Engineer, do hereby declare the nature of the Invention for "IMPROVEMENTS
IN TUBULAR WROUGHT-IRON TELEGRAPH POSTS," to be as follows:-
This Invention has for its object the strengthening of iron telegraph posts
made in the form of tubes by inserting wrought or cast iron hoops into the
internal part of such tubes at such distances as may be deemed desirable, and
according to the strength required the wrought or cast iron hoops may vary in
width, and be rivetted, welded, or braised, and of any thickness.
When the tubes taper, these hoops may be made with a corresponding taper
to the part at which it is desired to place the hoop; or as an internal stay,
where they will wedge themselves; the hoop may also be rivetted to the tube,
or held by the two being galvanized together.
The object is to prevent the buckling internally of such tubes when strains
bear upon them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Hamilton in the Great Seal Patent Office on the
20th May 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HAMILTON, Jun., of Liverpool, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of November, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Hamilton, Her special licence that I, the said John Hamilton,
my executors, administrators, and assigns, or such others as I, the said
John Hamilton, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make; use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
TUBULAR WROUGHT-IRON TELEGRAPH POSTS," upon the condition (amongst others)
that I, the said John Hamilton, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Hamilton, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object the strengthening of iron telegraph posts
made in the form of tubes by inserting wrought or cast iron hoops into the
internal part of such tubes at such distances as may be deemed desirable; and
according to the strength required the wrought or cast iron hoops may vary
in width, and be rivetted, welded, or braised, and of any thickness. When
the tubes taper, these hoops may be made with a corresponding taper to
the part at which it is desired to place the hoop, or as an internal stay, where
they will wedge themselves; the hoop may also be rivetted to the tube or held
by the two being galvanized together.

page_text: The object is to prevent the buckling internally of such tubes when strains
bear upon them.
The Drawing shews two opposite side views of a tubular wrought-iron
telegraph post strengthened internally as above described with wrought or cast
iron hoops. The tubular post shewn in the Drawing is composed of sheet
metal bent into a tubular form and rivetted up into a tube; but the tube may
be otherwise formed. The internal rings are shewn by dotted lines at B, B;
they are made tapered to correspond with the taper of the tube, and each ring
is of the requisite diameter to fit the interior of the tube at the point where it
is to be fixed; the rings are by preference forced into their positions in the
tube by means of a ram or forcer worked by power, the ram entering the tube
and forcing the rings into their proper position. The rings may then be
secured by a rivet, or when the posts are to be galvanized, by the process of
galvanizing or otherwise as above described.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim is the
strengthening tubular wrought-iron telegraph posts as herein described.
In witness whereof, I, the said John Hamilton, have hereunto set my
hand and seal, this Sixteenth day of May, in the year of our Lord One
thousand eight hundred and sixty-one.
JOHN HAMILTON, JR. (L.S.)