Improvements in the Manufacture of Tubular Metallic Articles, such as Masts, Booms, Spars, Shear-legs, Crane-posts, Guys for Crane-posts, Columns, and the like.
Year: 1886

page_text: Date of Application, 16th Oct., 1886.
Complete Left, 13th July, 1887.
Complete Accepted, 19th Aug., 1887.
PURORAD
Improvements in the Manufacture of Tubular Metallic Articles,
such as Masts, Booms, Spars, Shear-legs, Crane-posts, Guys for
Crane-posts, Columns, and the like.
1, SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of York,
Engineer and Ironfounder, do hereby declare the nature of this invention to be
as follows:-
Tubular metallic articles such as Masts, Booms, Spars, Shear-legs, Crane-posts and
their guys and similar hollow metallic articles have heretofore usually been so made
as to present a plain exterior surface, having been constructed in parts, joined
together longitudinally by internal butt straps and circumferentially by internal rings
and rivets, which construction has rendered such articles heavy and costly.
Now my invention has for object the manufacture of such articles in a novel
manner, according to which they can be made sufficiently strong to resist the strains
to which they may be subjected, whilst at the same time being of lighter construction
than when made as hertofore has been usual.
To this end I construct such articles of thin plates of suitable metal such as mild
steel, corrugated or fluted longitudinally and either in one or more lengths according
to convenience. They may be built up of parts with longitudinal flanges for joining
them together. A part of the said flanges may be turned outwardly from their radial
line of junction, so that when the sections are put together, such outwardly turned
parts form a T guide or guides for sliding rings for sails to be attached thereto.
Also when making such articles in separate lengths, they can be formed with end
flanges for joining them together.
In carrying out my invention I use machinery or apparatus comprising a female
die having an internal configuration corresponding to the external form required to be
imparted to a section of a mast or other tubular article such as above referred to, and

page_text: a male die having an external configuration corresponding to the internal configuration
of the female die. In connection with these dies, apparatus worked by hydraulic or
other power is provided, the arrangement being such that a plate of metal can be
pressed between the dies and thus will have imparted to it the required fluted or
corrugated form besides being flanged longitudinally, by which flanges the sections
are secured together by bolts or rivets.
To form ships' yards or other similar articles tapering in two opposite directions,
dies may be used of only about half the full length of the finished article, the same
dies being used to form such tapered parts successively.
THOS. E. CRAVEN,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Tubular Metallic Articles,
such as Masts, Booms, Spars, Shear-legs, Crane Posts, Guys for
Crane-posts, Columns, and the like.
I, SAMSON Fox, of the Leeds Forge, New Wortley, Leeds in the County of York,
Engineer and Ironmaster 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:-
Tubular metallic articles such as Masts, Booms, Spars, Shear-legs, Crane posts and
their Guys and similar hollow metallic articles have heretofore usually been so made
as to present a plain exterior surface, having been constructed in parts, joined together
longitudinally by internal butt straps and circumferentially by internal rings and
rivets, which construction has rendered such articles heavy and costly.
Now my invention has for object the manufacture of such articles in a novel
manner, according to which they can be made sufficiently strong to resist the strains
to which they may be subjected, whilst at the same time being of lighter construction
than when made as heretofore has been usual.
To this end I construct such articles of thin plates of suitable metal such as mild
steel, corrugated or fluted longitudinally and either in one or more lengths according
to convenience. They may be built up of parts with longitudinal flanges for joining
them together.

page_text: A part of the said flanges may be turned outward from their radial line of junction,
so that when the sections are put together such outwardly turned parts form a
Tguide or guides for sliding rings for sails to be attached thereto.
Also when making such articles in separate lengths they can be formed with end
flanges for joining them together.-In carrying out my invention I use machinery
or apparatus comprising a female die having an internal configuration corresponding
to the external form required to be imparted to a section of a mast or other tubular
article such as above referred to, and a male die having an external configuration
corresponding to the internal configuration of the female die. In connection with
these dies, apparatus worked by hydraulic or other power is provided the arrangement
being such that a plate of metal can be pressed between the dies and thus will have
imparted to it the required fluted or corrugated form besides being flanged longi-
tudinally, by which flanges, the sections are secured together by bolts or rivets.
To form ships' yards or other similar articles tapering in two opposite directions,
dies may be used of only about half the full length of the finished article, the same
dies being used to form such tapered parts successively.
In
In the annexed drawings, like letters represent like parts wherever they occur.
Fig. 1, sheet 1, shews a tubular corrugated or fluted mast which may be in any
number of lengths to suit circumstances. Fig. 2, is an end elevation. Fig. 3, shews
a plate of metal a, from which a section of such mast is to be made. Fig. 4, sheet 2,
is a plan of a female die b, as required in an operation for imparting to the plate a,
an approximate form to the required finished section. Fig. 5, is an end elevation
of the same, shewing also at c, an end elevation of the corresponding male die.
The plate of metal a, after being heated is placed upon the female die b, as shewn
previous to the dies being caused to approach each other to give to the plate the
desired form, with a flange at each side. Fig. 6, shews the dies b, and c, closed with
the partially formed section a between them. On removal of the partially formed
section a, from the die or dies, it is re-heated and subjected to a further pressing or
stamping process to form the lengthwise corrugations or flutes thereon. Fig. 7, is
a plan of the female corrugating or fluting die d. Fig. 8, is an end elevation of the
same shewing also the corresponding male die e, above it, the partially formed
section a, of a nast being between them ready to be corrugated or fluted.
the said female die d, are separate side parts d 1, d 1, in which the projecting
ridges d 2, overhang the hollows or flutes d 3, these separate parts are loose and arranged
to leave the main portion of the die d, with the corrugated or fluted section a, on the
removal of the latter from the die. The male die e, is also provided with loose
parts e 1, e 1, fitted to the main portion in suchwise that on the closing of the dies as
shewn in Fig. 9, the loose parts e 1, e 1, are, by the action of the tapered sides of e,
caused to press the section a, into the side flutes of the female die d. The said
loose parts e 1, e 1, are caused to recede from the fluted section on the separation of the
said dies d, and e, after such section has been fluted. e 2, e 2, are parts depending
from the male die e, for turning a portion of the flange of the section a, (as shewn
at a 1, Fig. 9.) at right angles to the radial line of junction of the two sections
forming the tubular structure, so as to form a T head guide for sliding rings to
which sails have to be attached as previously referred to. The two sectional parts of
the structure are joined together by rivets or otherwise through the aforesaid flanges.
End flanges may be formed out of the respective sections or flanges may be attached
thereto by which one section or length may be joined to another. When tubular
articles such as above referred to are made in three parts, each containing in cross
section or circumferentially 120 degrees, the operation of partially forming the
sections may in most cases be dispensed with and the corrugations or flutes be
formed by the corrugating or fluting dies at one operation, the dies in this case
being much simplified as no loose parts such as d 1, and e 1, will be required.
Male and female dies required for forming tubular articles other than inasts and
such as herein before mentioned, being similar to those just described it is not
necessary to repeat a description or drawing of the same.

page_text: Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that I do not claim broadly
the making of tubular metallic articles in sections nor do I claim broadly the
corrugating of metallic plates for making tubular metallic articles but what I do
claim is
1. A tubular metallic mast made in sections with longitudinal corrugations
substantially in the manner hereinabove described whether with or without the
longitudinal shaped part produced as set forth for sail rings to slide upon.
2. A Boom, Spar, Shear-leg, post guy or column made hollow in sections with
longitudinal corrugations substantially in the manner hereinabove described.
3. The manufacture of tubular metallic articles such as Masts, Booms, Spars,
Shear-legs, Crane posts, Guys for Crane posts, Columns and the like in the manner
described by stamping or pressing apparatus substantially such as described with
reference respecting to and illustrated by Figs. 5 and 6, and by Figs. 8 and 9,
whether the latter be (in the case of masts) adapted to turn down portions (a 1) of the
flanges as specified or not.
Witness:
THOS. E. CRAVEN, C.E., Fel. Inst. P.A.,
24, Victoria Chambers, Leeds.