AN IMPROVEMENT IN BOILER STAYS.
Year: 1859

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, E.C., Editor of the Mechanics' Magazine and
. Patent Agent, for the Invention of "AN IMPROVEMENT IN BOILER STAYS.."
-A communication from Jean Perrier, residing, at Nimes, France..
Sealed the 31st August 1859, and dated the 4th March 1859.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on
the 4th March 1859.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, E.C., Editor of the Mechanics' Magazine and Patent Agent, do
hereby declare the nature of the said Invention for "AN IMPROVEMENT IN
BOILER STAYS," (communicated to me by Jean Perrier, residing at Nimes,.
France,) to be as follows:-
In all boilers where two surfaces are to be kept apart, stays are employed;:
these stays are generally in the form of bolts, extending from one surface to
the other, and fastened by rivetting, or by screwing into the surfaces, or by
both, or by nuts applied on one or both ends of the bolt.
In the present Invention the holes formed in the two plates or surfaces to
be stayed are of different diameters. In one plate the hole is of the diameter
of the solid bolt to be used; in the other plate it is of the exterior diameter
of a hollow cylinder, to be placed over the bolt. This cylinder has saw
or other cuts, made in order to divide it for a certain length into several

page_text: segments. In order to fix the stay, first introduce the undivided end of the
cylinder through the large hole in one plate, and rest the undivided end
against the inside of the opposite plate; next introduce a conical mandril, and
separate or drive out the divided end of the cylinder, until the segments are
clear of the hole through which the cylinder was introduced; then insert
through the large hole a bolt, carry it through the cylinder, and into and
through the small hole in the opposite plate, and secure both ends by rivetting
while the bolt is hot, or by rivetting one end and a screw nut on the other, or
by screw nuts on both ends.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 3rd September 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, E.C.,
Editor of the Mechanics' Magazine and Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of March, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Archibald Brooman, Her special licence that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such others
as I, the said Richard Archibald Brooman, 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 Inven-
tion for "AN IMPROVEMENT IN BOILER STAYS," (communicated from Jean Perrier,
residing at Nimes, France,) upon the condition (amongst others) that I, the said
Richard Archibald Brooman, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly 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 Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same is

page_text: to be performed, to be particularly described and ascertained. in and by the
following statement thereof, reference being, had to the Drawings hereunto
annexed, that is to say:-
In all boilers where two surfaces are to be kept apart, stays are employed;
these stays are generally in the form of bolts extending from one surface to
the other and fastened by. rivetting, or by screwing into the surfaces, or by
both, or by nuts applied on one or both ends of the bolt.
In the present Invention the holes formed in the two plates or surfaces to
be stayed are of different diameters. In one plate the hole is of the diameter
of the solid bolt to be used; in the other plate it is of the exterior diameter of
a hollow cylinder to be placed over the bolt. This cylinder has saw or other
cuts made, in order to divide it for a certain length into several segments, as
illustrated in the accompanying Drawings, in which several modifications of
the improvement are shewn.
Figure 1 is a vertical section shewing one arrangement. Figure 2 is
a plan through the line l, m, of Figure 1. Figure 4 is a plan through the line
n, o, of Figure 3. Figure 6 is a plan through the line p, q, of Figure 5; and
Figure 8 is a plan through the line r, s, of Figure 7. a, b, are the two boiler
plates; c, c, d, d, (Figures 1, 3, 5, and 7,) are holes formed in the plates,
through which the rivets or stays are placed. These holes are of different
sizes. The holes c, c, are of the size of the rivets g, in all the cases, whilst the
holes d, d, are of the size of the hollow cylinders e, e; f. f, are the saw or other
cuts made in the cylinders e, h, Figure 7 is a collar, which in some cases is
placed between the upper plate a and the rivet. In Figures 3 and 4, the
split end of the cylinder is shown in its unexpanded form. Sometimes the
rivet is made conical at its upper part, or in other cases of an equal thickness
throughout, as shewn in Figure 7. In order to fix the stay, first introduce
the undivided end of the cylinder e through the large hole d in the plate a, and
rest the undivided end against the inside of the opposite plate b; next
introduce a conical mandril, and separate or drive out the divided end of the
cylinder, until the segments are clear of the hole d, through which the
cylinder e was introduced; then insert through the large hole a bolt g; carry
it through the cylinder, and into and through the small hole in the opposite
plate b, and secure both ends by rivetting as shewn, while the bolt is hot, or
by rivetting one end and a screw nut on the other, or by screw nuts on
both ends.
And having now described the nature of the said Invention and in what
manner the same is to be performed, I declare that I claim the method of
forming boiler stays of cylinders or tubes, passed through enlarged rivet or

page_text: bolt holes, and afterwards expanded at the ends adjacent to such holes,
essentially as herein-before described.
In witness whereof, I, the said Richard Archibald Brooman, have
hereunto set my hand and seal, this Third day of September, One
thousand eight hundred and fifty-nine.
R. A. BROOMAN. (L.S.)