AN IMPROVED CON- OMDHOTION OF SADEME VALUE DOD STEAM ENGINESSTRUCTION OF SAFETY VALVE
Year: 1854

page_text: LETTERS PATENT to William Partington, of Bolton-le-Moors, in the
County of Lancaster, Engineer, for the Invention of "AN IMPROVED CON-
OMDHOTION OF SADEME VALUE DOD STEAM ENGINES"
Sealed the 25th July 1854, and dated the 27th January 1854.
PROVISIONAL SPECIFICATION left by the said William Partington at
the Office of the Commissioners of Patents, with his Petition, on the
27th January 1854.
I, WILLIAM PARTINGTON, of Bolton-le-Moors, in the County of Lancaster,
Engineer, do hereby declare the nature of the said Invention for "AN IN-
PROVED CONSTRUCTION OF SAFETY VALVE FOR STEAM ENGINES" to be as follows:-
This improved valve is held down to its seat by means of arms extending
from it externally, to which arms a weighted ring is suspended by vertical
rods. The valve may be either of a spherical, segmental, or a flat form, the
seat being made to correspond. The ordinary steam tube or chamber extend-
ing from the top of a boiler, has its opening for the escape of steam as usual,
but the valve which closes this aperture in my improved construction is held
down neither by springs nor levers. The arms extending radially round the
cap to which the valve is attached, have each of them a pendent rod connected
to a ring at bottom that surrounds the steam tube. Upon this ring I place
segmental weights, according to the required force of the steam within the
boiler; and when the pressure of the steam increases beyond the required
force, this valve with its weighted ring rises and allows the steam to pass off

page_text: into the jacket or casing which encloses and conceals the steam tube valve
and weighted ring, and is made fast by a band and lock below. The valve is
thus shut up from any access, and being held down by fixed weights is not
liable to any accidental variation of pressure, and the steam in the boiler,
when its force increases so as to raise the valve, escapes into the close jacket
or casing, and passes through an alarm whistle below.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Partington in the Great Seal Patent Office on the
27th July 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
PARTINGTON, of Bolton-le-Moors, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of January, in the year of our
Lord One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself. Her heirs and successors, give and grant unto me, the
said William Partington, Her especial license, that I, the said William Par-
tington, my executors, administrators, and assigns, or such others as I, the
said William Partington, 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 "AN IM-
PROVED CONSTRUCTION OF SAFETY VALVE FOR STEAM ENGINES," upon the condition
(amongst others) that I, the said William Partington, 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 per-
formed, 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 William Partington, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement and accompanying Drawing (that is to say):-
Fig. 1 is a vertical section of the valve as attached to the boiler, and Fig. 2
is a horizontal section thereof. To the boiler plate is attached a cup shaped

page_text: part a, provided with a central tube b, open to the steam pressure; and with a
whistle the upper end of the tube b is ground accurately for the reception of
a valve c, which I have shewn spherical in form. Above the valve is placed a
saddle d, to which pendent rods e arc attached, their lower ends being con-
nected to a ring f, which surrounds the tube b. Upon this ring are placed a
number of segmental weights h, furnished with slots in which the rods e are
situate, and by this means the valve may be loaded to any desired extent.
The apparatus thus arranged is enclosed by a cover i, secured to the part a by
means of bolts; to resist steam pressure upon the cover i are also formed
staples j, extending through the flange of the lower portion a, through which
staples a ring k is passed, and secured by a lock, so as to prevent access to the
interior apparatus. Upon the steam acquiring an undue pressure, the valve c
will be lifted against the weight of the segmental pieces h, and enter the
chamber formed by the parts a and i, from which there is no escape but by
the whistle 1, in passing through which an alarm will consequently be given.
Having thus. described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I desire it to be understood
that I claim as secured to me, under the above in part recited Letters Patent,
the combination of apparatus above described, consisting of the loaded valve
within a closed chamber, provided with a whistle or other such alarm.
In witness whereof, I, the said William Partington, have hereunto set my
hand and seal, this Twenty-sixth day of July, in the year of our
Lord One thousand eight hundred and fifty-four.
WILLIAM PARTINGTON. (L.B.)