IMPROVEMENTS IN SAFETY VALVES FOR STEAM BOILERS AND GAS CHAMBERS"
Year: 1853

page_text: LETTERS PATENT to George Frederic Goble, of 15, Great Fish
Street Hill, in the City of London, Master Mariner, for the
Invention of "IMPROVEMENTS IN SAFETY VALVES FOR STEAM BOILERS
AND GAS CHAMBERS"
PROVISIONAL SPECIFICATION left by the said George Frederic
Goble at the Office of the Commissioners of Patents, with his
Petition, on the 8th April 1853.
I, GEORGE FREDERIC GOBLE, of 15, Great Fish Street Hill, in the
City of London, Master Mariner, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN SAFETY VALVES FOR STEAM BOILERS
AND GAS CHAMBERS" to be as follows:-
My improvements apply to a peculiar arrangement of two valves
acting in concert, connected by a lever, allowing one valve to be acted

page_text: on by external pressure, and the other by internal pressure, to which
being adjusted, no temporary or unauthorized alteration can be made
for retaining the steam beyond the desired pressure, as frequently and
fatally practised with the ordinary made valves of steam boilers. At
the same time it can readily be adjusted and set to any continuous
pressure for the required work, according as may appear advisable.
And in order that the Invention may be fully understood and carried
into effect, I will proceed to describe the same, reference being had
to the drawing hereunto annexed, and to the letters marked thereon.
Fig. 1, is a sectional portion of the top surface of a common engine
boiler A, B, having suitable apertures in it, fitted with metal collars
furnished with the atmospheric valve C, a, and the steam valve D, 6:
these valves have each a centre spindle a, and b, connected by the lever
a, c, b, the fulcrum being at c, consisting of the short stout pillar, to
which the lever is bolted at c, so as to move freely under the action of
either valve. e, is a powerful spring, made secure to the boiler plate or
the pillar d, and presses freely on the lever at f. Over the valve D, is
the engineer's protective cover or locked valve guard g, perforated for
the escape of steam; and within is space sufficient for weighting the valve;
or such weight may be affixed under the valve, should the spring e, f,
either not be used, or be inefficient of itself to afford suflicient pressure.
the valve C, is provided with the screw and handle h, by means of
which it can be forced open only. The action of this arrangement of
double action valves is obvious, and the principle of my Invention may
be modified considerably; I therefore do not restrict myself to its being
placed within a boiler or a gas chamber, or to any other particular
situation, or dimensions, or patterns, (however, it is absolutely necessary
that the two valves should have different areas or leverages to counter-
poise the effect of the pressure of the steam within the boiler,) so long
as the principle I have described is maintained. And I declare that.
what I claim as my Invention is, the peculiar construction of a steam
or gas safety valve, as described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Frederic Goble, in the Great Seal
Patent Office, on the 7th October 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
GEORGE FREDERIC GOBLE, of 15, Great Fish Street Hill, in the City
of London, Master Mariner, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of April, in the year of
our Lord One thousand eight hundred and fifty-three, in the six-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said George Frederic Goble, Her special
licence that I, the said George Frederic Goble, my executors, admi-
nistrators, and assigns, or such others as I, the said George Fre-
deric Goble, 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 SAFETY VALVES FOR STEAM
BOILERS AND GAS CHAMBERS," upon the condition (amongst others)
that I, the said George Frederic Goble, 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 George Frederic Goble, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement.
My improvements apply to peculiar arrangements of two safety
valves acting in concert, connected by a lever, allowing one valve to be
acted on by external pressure, and the other by internal pressure, to
which being adjusted, no temporary or unauthorized alteration can be

page_text: At the
and ratany practised with the oromary valves of steam boners.
same time my improved valves can readily be adjusted and set to any
continuous pressure for the required work, according as may appear
advisable.
And in order that my said Invention may be fully understood and
efficiently worked, I will now proceed to describe the same in detail,
reference being had to the drawing hereunto annexed, and to the letters
marked thereon.
DESCRIPTION OF THE DRAWING.
Figure 1, is a longitudinal section of my improved safety valves.
A, B, is a sectional portion of the top surface of a common engine
boiler, having suitable apertures in it, fitted with metal collars, furnished
with the atmospheric valve C, a, and the steam valve D, b: these valves
have each a centre spindle a, and b, connected by the lever a, c, b, the
fulcrum being at c, consisting of the short stout pillar d, to which the
lever is bolted at c, so as to move freely under the action of either. valve.
It is absolutely necessary, however, that the two valves should have
different areas, or leverages, to counterpoise the effect of the pressure of
the steam within the boiler. e, is a strong spring, made secure to the
boiler plate, or the pillar d, and presses freely on the lever at f. Over
the valve D, is the engineer's protective cover, or locked valve guard, g,
perforated for the escape of steam; and within is sufficient space for
weighting the valve; or such weight may be affixed under the valve,
should the spring e, f, either not be used, or be found ineffective of
itself to afford sufficient pressure. The valve C, is provided with a
weighted lever, or the screw and handle h, by means of which it can be
forced open only. The operation of this arrangement of double action
valves is obvious, and it will be understood how the principle of my
Invention may also be carried out by employing wheels and pinions to
regulate the action of the valves, if required; and my Invention may in
other like ways be modified considerably.
I therefore do not restrict myself to placing my improved valves in
any particular part or situation in boilers or gas chambers, or to dimen-

page_text: sions or patterns, so long as the principle I have herein described is
maintained. And I do declare that what I do claim as my Invention
is, namely, the peculiar construction of steam or gas safety valves, as
described.
In witness whereof, I, the said George Frederic Goble, have
hereunto set my hand and seal, this Seventh day of October, in
the year of our Lord 1853.