IMPROVEMENTS IN VALVES
Year: 1878

page_text: LETTERS PATENT to Thomas Nesham Kirkham, of Abingdon Street, West-.
minster, Gas Engineer, and Samuel Chandler, junior, of Newington Causeway,.
Gas Fitting Manufacturer, for the Invention of "IMPROVEMENTS IN VALVES."
Sealed the 7th February 1879, and dated the 13th August 1878.
-
PROVISIONAL SPECIFICATION left by the said Thomas Nesham Kirkham
and Samuel Chandler at the Office of the Commissioners of Patents on the.
13th August 1878.
THOMAS NESHAM Kirkham, of Abingdon Street, Westminster, Gas Engineer, and
SAMUEL CHANDLER, junior, of Newington Causeway, Gas Fitting Manufacturer.
"IMPROVEMENTS IN VALVES."
Our Invention of improvements in valves consists of constructing valves of a
tubular form, having a hollow plug with openings on their sides, such openings
corresponding with others in the outer casing or tube. The plug may be put in
motion by a tangent wheel and screw, or by bevel or spur gearing. These valves
are applicable for the ordinary purposes for which valves are used, but they are
especially adapted for relieving the pressure from retorts in the manufacture of gas
by being formed in the dip pipe itself, by which means a clear and unobstructed
passage is provided for the gas into the hydraulic main from the retort without
interfering with the cleaning out or ordinary working of the dip pipe.
combination of this valve and dip pipe may also be used as a bye-pass or safety
valve.
The

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Thomas Nesham Kirkham and Samuel Chandler in the Great Seal Patent
Office on the 13th February 1879.
THOMAS NESHAM KIRKHAM, of Abingdon Street, Westminster, Gas Engineer, and
SAMUEL CHANDLER, junior, of Newington Causeway, Gas Fitting Manufacturer.
"IMPROVEMENTS IN VALVES."
And in order that our Invention of improvements in valves may be properly
understood and carried into effect, we will now proceed to describe the same inore
particularly, reference being had to the accompanying Drawings, and to the letters
and figures marked thereon.
Figure 1 is a front elevation of one form of the improved valves.
Figure 2 is a vertical section taken at right angles to Figure 1, and Figure 3 is a
plan corresponding to Figure 1.
The body A is of a tubular figure, and is cast with the lateral apertures B, which
form the outlet from the interior of the body A.
The upper part of the casing at C forms an annular recess, in which the mechanical
arrangement for opening and closing the ports is placed at D; in this case it consists
of a tangent wheel and screw E, by means of which the plug F, which fits accurately
to the inner face of the valve, is caused to rotate, and thus opens or closes the egress
passages.
The tangent wheel is carried in a suitable recess formed on the external casing,
and the wheel is actuated by a cranked handle or other suitable equivalent
therefor.
The upper part of the valve casing is enclosed by the cap G, by removing which
the interior of the valve may at any time be readily inspected.
In the second modification, shewn in elevation, Figure 4, section Figure 5, and
plan Figure 6, here the arrangement for actuating the plug F consists of a bevel
pinion H, fast on the spindle I, which projects through a lateral gland.
The bevel wheel gears with an annular rack K formed on the upper part of the
plug F, so that by giving motion to the spindle I, the ports B are opened or closed
as desired.
In other respects the arrangement of the valve is similar to that shewn in
Figures 1 to 3. These valves are applicable to many purposes, but they are particu-
larly suitable for a special purpose in the manufacture of gas; that of relieving the
retorts from pressure during the manufacture.
The valve is arranged so as to form a portion of the dip pipe, and in this way a
clear and unobstructed passage is provided for the rapid egress of the gas to the
hydraulic main, and without interfering in any way with the general working.
"
The general combination of these improved valves and dip pipe may also be used
as a bye-pass," and thus secure an additional element of safety in gas manu-
facture.
Having now described and particularly ascertained the nature of our said Inven-
tion, and in what manner the same may be carried into effect, we claim under the
herein-before in part recited Letters Patent,-
Firstly. The general arrangement and construction of the valve, as shewn in
Figures 1 to 3 of the accompanying Drawings, or any mere modification of the
same.
Secondly. The general arrangement, construction, and application of the valve

page_text: delineated in Figures 4 to 6 of the accompanying Drawings, and substantially as
herein-before described.
In witness whereof, I, the said Thomas Nesham Kirkham, have hereunto set
my hand and seal, this Thirteenth day of February, in the year of our Lord
One thousand eight hundred and seventy-nine.
T. N. KIRKHAM. (1..S.)