IM- PROVEMENTS IN SETTING HORIZONTAL STATIONARY BOILERS
Year: 1870

page_text: LETTERS PATENT to Jeremiah Head, of Newport Rolling Mills,
Middlesbrough, in the County of York, for the Invention of "IM-
PROVEMENTS IN SETTING HORIZONTAL STATIONARY BOILERS."
i
PROVISIONAL SPECIFICATION left by the said Jeremiah Head at the
Office of the Commissioners of Patents, with his Petition, on the
23rd May 1870.
I, JEREMIAH HEAD, of Newport Rolling Mills, Middlesbrough, in
the County of York, do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN SETTING HORIZONTAL STATIONARY BOILERS," to be as
follows:-
My Invention consists in an improved method of setting horizontal
stationary boilers by suspending them partly or entirely upon springs
or other yielding support, so that within certain limits such boilers may
expand or contract and consequently rise or fall at certain parts without
altering the number or locality of the points of support. For this
purpose I suspend the boiler by means of suspension rods to two or

page_text: more cast-iron bridges stretching above the boiler and across it from one
side of the brickwork to the other, but instead of supporting the
suspension rods simply by means of screw nuts upon the cross bridge,
volute or other springs or counterbalance weights are adapted to the
suspension rods so as to allow for any vertical play therein. By this
means the degree of support afforded by any of the points of suspension
is not materially increased or diminished notwithstanding any slight
alteration in the form of the boiler as previously described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Jeremiah Head in the Great Seal Patent Office on
the 23rd November 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JEREMIAH
HEAD, of Newport Rolling Mills, Middlesbrough, in the County of
York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of May, in the
year of our Lord One thousand eight hundred and seventy, in the
thirty-third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Jeremiah Head, Her special license
that I, the said Jeremiah Head, my executors, administrators, and
assigns, or such others as I, the said Jeremiah Head, my executors,
administrators, or 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
SETTING HORIZONTAL STATIONARY BOILERS," upon the condition (amongst
others) that I, the said Jeremiah Head, my executors or administrators,
by an instrument in writing under my hand and seal, 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 Jeremiah. Head, do hereby declare
the nature of the said Invention, and in what manner the same is to

page_text: be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying
Drawings and to the letters and figures marked thereon (that is to
say) :-
:-
My said Invention consists in an improved method of setting horizontal
stationary boilers by suspending or otherwise supporting them partly
or entirely upon springs or other yielding support, so that within certain
limits such boilers may expand or contract, and subsequently rise or
fall at certain parts without altering the number or locality of the points
of support. For this purpose I suspend the boiler by means of suspension
rods to two or more cast-iron bridges stretching above the boiler and
across it from one side of the brickwork to the other, but instead of
supporting the suspension rods simply by means of screw nuts, upon
the cross bridge volute or other springs or counterbalance weights
and levers are adapted to the suspension rods so as to allow for any
vertical play therein. By this means the degree of support afforded
by any of the points of suspension is not materially increased or
diminished notwithstanding any slight alteration in the form of the
boiler as previously described.
And in order that my said Invention may be fully understood I shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings,
the same letters of reference indicating corresponding parts in all the
Figures.
Figure 1 of my Drawings represents a longitudinal vertical section
of an ordinary cylindrical horizontal stationary boiler and setting.
mounted or supported in accordance with my said Invention, and
Figure 2 is a transverse vertical section of the same boiler drawn to an
enlarged scale. A is the brick setting; B, the furnace; C, the flues, and
D is the boiler itself, which has two, three or more, T bars a rivetted
across the upper surface of the boiler at any suitable intervals, to each
of which T bars there are jointed the lower forked ends of two, three, or
more vertical suspension rods b, b, the upper ends of such suspension
rods being passed through transverse permanent girders or bridge pieces
of wrought or cast iron E, E, supported a short distance above the
boiler and transversely thereto upon the uprights F, F, or other con-
venient supports; c, c, are single volute or helical springs, which are
interposed between an adjustable nut d, on the protruding upper end

page_text: of each suspension rod and the upper surface of the girders or fixed
supports E, as shewn clearly in Figure 2; e, e, are adjustable check
nuts situate beneath the under surface of the cross girders E for the
purpose of preventing any undue lifting of the boiler by the expansion
of the springs c, c, when the water is temporarily discharged and the
total weight thereby diminished. The springs should be sufficiently
powerful to balance the weight of the boiler when it contains its working
quantity of water. Figure 3 is a detail shewing the application of
double reversed volute springs c¹, c¹, in place of the single springs
shewn in Figure 2. Figure 4 is a similar view to that shewn at
Figure 2, but illustrates the substitution of levers f.f, and counter-
weights g, g, for the springs c, the amount of rise and fall in the
suspension rods 6 being controlled or adjusted by the nuts d and e.
In order to admit of the free play or expansion and contraction in
the feed and steam pipes as the boiler rises and falls I propose to
curve such pipes in the manner shewn at hand i (Figure 1), whereby
they will be enabled to spring or yield without effecting the stability
of their joints. The sludge pipe k if connected with a transverse main
must be fitted with an ordinary expansion joint as shewn in Figure 1.
I may here observe that it is not absolutely essential that all the
supporting cross girders or bearers should be furnished with yielding
appliances, although I prefer when using springs to apply them to the
whole of the girders in order to throw less work upon cach spring and
to obtain a less disturbance of the brickwork by striking a general
average, the boiler having a tendency to sink slightly in the middle
and to rise slightly at its two extremities. When using levers and
balance weights as shewn in Figure 4 any two of the supporting girders
equidistant from the middle of the boiler ought to be made to act rigidly
in the ordinary way whilst the remaining ones are provided with counter-
weighted levers which will accommodate themselves to any change of
form in the boiler due to the more or less expansion of the bottom as
compared with the top of the boiler. As it is obvious that the system
of elastic or yielding supports may be applied in various ways to horizontal
stationary boilers, I do not confine or restrict myself to the precise
methods illustrated by my Drawings.
"
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe in conclusion that what I con-

page_text: sider to be novel and original and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,
the supporting of horizontal stationary steam generators either whelly
or partially upon yielding supports for the purpose herein-before
specified.
In witness whereof, I, the said Jeremiah Head, have to this my
Specification set my hand and seal, this Seventeenth day of
November, One thousand eight hundred and seventy.
or partially upon yielding supports for the purpose herein-before
specified.
In witness whereof, I, the said Jeremiah Head, have to this my
Specification set my hand and seal, this Seventeenth day of
November, One thousand eight hundred and seventy.
JEREMIAH HEAD. (L.S.)