IMPROVEMENTS IN VALVES FOR. STEAM AND OTHER FLUIDS AND LIQUIDS
Year: 1865

page_text: LETTERS PATENT to John Nuttall, Manager of the Works of James'
Nasmyth and Company, Bridgewater Foundry, Patricroft, near the
City of Manchester, for the Invention of "IMPROVEMENTS IN VALVES FOR.
STEAM AND OTHER FLUIDS AND LIQUIDS."
Sealed the 21st November 1865, and dated the 2nd June 1865.
PROVISIONAL SPECIFICATION left by the said John Nuttall at the
Office of the Commissioners of Patents, with his Petition, on the 2nd
June 1865.
I, JOHN NUTTALL, Manager of the Works of James Nasmyth and Com-
pany, Bridgewater Foundry, Patricroft, near the City of Manchester, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN VALVES
FOR STEAM AND OTHER FLUIDS AND LIQUIDS," to be as follows:-
My Invention consists in making steam and other valves of a segmental
form, and fitting the valve in a cylindrical case or box; the spindle of the
valve passes at one end through a stuffing box in the lid of the box or case,
and to it are fixed one or more projections with recesses containing springs
which act on the segmental valve and hold it against its face. When the
valve is opened by a handle fixed to the spindle or otherwise, the steam or

page_text: water or other liquid or fluid is at liberty to flow freely through the valve
box and through an opening in the bridle which connects the valve to the
valve spindle, thus allowing an uninterrupted current to pass from one pipe to
another when the valve is placed in a line of pipes.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Nuttall in the Great Seal Patent Office on the 30th
November 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
NUTTALL, Manager of the Works of James Nasmyth and Company, Bridge-
water Foundry, Patricroft, near the City of Manchester, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of June, in the year of our Lord One
thousand eight hundred and sixty-five, in the twenty-eighth year of Her reign,
lid, for Herself, Her heirs and successors, give and grant unto me, the said
John Nuttall, Her special license that I, the said John Nuttall, my executors,
administrators, and assigns, or such others as I, the said John Nuttall, 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 VALVES FOR
STEAM AND OTHER FLUIDS AND LIQUIDS," upon the condition (amongst others)
that I, the said John Nuttall, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Nuttall, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say) :-
My Invention consists in making steam and other valves of a segmental
form and fitting the valve in a cylindrical case or box; the spindle of the
valve passes at one or both ends through a stuffing box in the lid or lids of
the box or case, and to it are fixed one or more projections with recesses con-

page_text: taining springs which act on the segmental valve and hold it against its face:
When the valve is opened by a handle fixed to the spindle or otherwise, the
steam or water or other liquid or fluid is at liberty to flow freely through the
valve box and through an opening in the bridle which connects the valve to
the valve spindle, thus allowing an uninterrupted current to pass from one
pipe to another when the valve, box is placed in a line of pipes.
These improvements in valves will be clearly understood by referring to
the accompanying Sheet of Drawings, and to the figures and letters marked
thereon.
Figure 1 is a vertical section, Figure 2 a plan in section, Figure 3 a
side view, and Figure 4 a plan of one of my improved valves for steam or
other fluids or liquids.
a is the valve, the face of which is of a segmental form, and 6 is the cylin-
drical case or box in which the valve fits. When the case 6 is made of cast
iron the seating of the valve may be made of brass by dovetailing strips of
that metal into the edges of the egress passage, as shewn in Figure 2. The
spindle c of the valve at one end works in a foot step as shewn in Figure 1,
and at the other it passes through the stuffing box e, which is screwed or
otherwise fitted into the lid f of the case b. The spindle c has projections c²
in which are recesses for the springs 9 acting on the internal portion of the
segmental valve a to hold it against its face or seating; the valve is made
with a bridle through which the spindle c passes, and in this bridle sufficient
allowance is made at j for the wear of the face and seat of the valve, and
there may be holes through this bridle so that when the passage is opened by
turning the valve to one side by the handle h fixed to the spindle c or other-
wise, the steam, water, or other liquid or fluid is not only at liberty to flow
freely through the valve box, but through these openings in the bridle forming
part of the valve, thus allowing an uninterrupted current to flow from one
pipe to another when the valve box is placed in a line of pipes. When the
valve is turned so as to close the passage the pressure of the fluid assists the
springs g in holding the valve against its seating, as shewn by the arrows in
Figure 1. These improved valves may be used as throttle, ingress, and egress
valves for steam engines, and for all purposes where steam, water, air or gas-
tight valves or taps are required.
Having thus stated the nature of my Invention, and described a convenient
mode of carrying the same into operation, I wish it to be understood that the
details may be considerably varied according to the size of the valve and the
particular object for which it may be required; and I claim the improved
segmental valve, as described, with bridle and self-adjustment and allow-

page_text: ance for wear and tear on valve and seating, or any modification of such
valve.
In witness whereof, I, the said John Nuttall, have hereunto set my
hand and seal, this Twenty-eighth day of November, One thousand
eight hundred and sixty-five.
JOHN NUTTALL. (LS.)