Improvements in Valves.
Year: 1890

page_text: Date of Application, 22nd Sept., 1890
Complete Specification Left, 18th June, 1891--Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Valves.
I, ALEXANDER LESLIE of 128 Leadenhall Street in the City of London,
Merchant do hereby declare the nature of this invention which has been com-
municated to me from abroad by George Brunton of Cochin, Malabar Coast in the
Empire of India, Civil Engineer to be as follows:-
This invention relates to valves to be used more especially for hot liquids, steam,
gases or the like where the employment of leather packings as ordinarily used is
objectionable.
A valve constructed according to my invention consists of an outer part or body
of the valve containing an inlet and an outlet and opposite the outlet a tubular part
into which is fitted an inner tubular piece which can be screwed lengthwise in the
outer tubular part in one direction until its inward end bears against the surface
around the outlet so as to close it or in the other direction to withdraw the said
inner tubular part from the said surface.
Inside the said tubular part is a rod capable of being moved longitudinally
therein. This rod is of a diameter equal to that of the outlet orifice so that when
the aforesaid inner tubular part is caused to bear on the surface around the outlet
to close it the said rod can be moved so that its inward end enters the outlet and
further ensure the complete closure of the outlet.
Packings should be applied around the said rod and the inner tubular part in
such places that when the valve is closed they are in the most suitable positions
for taking the pressure and preventing leakage in either direction.
Dated this 22nd day of September 1890.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in Valves.
I ALEXANDER LESLIE of 128 Leadenhall Street in the City of London
Merchant, do hereby declare the nature of this invention which has been com-
municated to me from abroad by George Brunton of Cochin, Malabar Coast in the
Empire of India Civil Engineer, and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement :-
This invention relates to valves to be used more especially for hot liquids, steam,
gases or the like, where the employment of leather packings as ordinarily used is
objectionable but the invention is not limited thereto the object of the said invention
being to construct a valve in such a manner that the packings thereof are protected
or screened as they cross the passages for the fluid.
A valve constructed according to this invention consists of an outer part or body
of the valve containing an inlet and an outlet and opposite the outlet a tubular part
into which is fitted an inner tubular piece which can be moved lengthwise in the
outer tubular part in one direction until its inward end bears against the surface
around the outlet so as to close it or in the other direction to withdraw the said
inner tubular part from the said surface.
Inside the said tubular part is a rod capable of being moved longitudinally
therein. This rod is of diameter equal to that of the outlet orifice so that when
the aforesaid inner tubular part is caused to bear on the surface arcund the outlet
to close it the said rod can be moved so that its inward end enters the outlet and

page_text: further insures the complete closure of the outlet. Packings should be around the
said rod and the inner tubular piece in such places that when the valve is closed
they are in the most suitable positions for taking the pressure and preventing
leakage in either direction.
And in order that this invention may be well understood I will describe with
reference to Figure 1 of the accompanying drawing the simplest and best method
with which I am acquainted for carrying this invention into effect as applied to
valves for hot liquors steam gases or the like at light or moderate pressure. The
said drawing shews in vertical section a valve constructed according to this
invention.
The outer part or body A of the valve contains an inlet a and an outlet a².
Opposite the said inlet is a tubular part B into which is fitted an inner tubular
piece C having packing in the groove at c and provided with a screw thread c³ so that
the said piece can be screwed lengthwise in the outer tubular part B in one-
direction until its inward end bears against a shoulder b in the part B. Inside the
said tubular piece C is a rod E having packings in the grooves at e and e² the said
rod being capable of being moved longitudinally in the tubular piece C. This rod
is of a diameter equal to the outlet orifice a² so that when the inner tubular piece C
is caused to bear on the shoulder of the part B the rod E can be moved
longitudinally so that its inward end enters the outlet a³ as shewn and ensures the
complete closure of the same the packing at 2 having been shielded by the part C
in its passage past the inlet a. The rod E may be provided with any suitable
device for operating it. I have shewn it as being provided with a knob E² for the
purpose. A pin e³ fitted in the inner tubular piece C and passing through a slot e
in the rod E regulates the distance to which the rod E may be withdrawn. The
inner tubular piece C is shewn as being operated by means of a hand wheel C²
keyed to it for rotating it. In the drawing the valve is shewn closed. To open
the valve the rod E is first drawn back until it is stopped by the pin e³ the
packing 2 on the said rod is thereby drawn into the inner tubular piece C as it
passes the inlet a and the said packing effectually protected or screened by the
part C from contact with the fluid. The inner tubular piece C is then screwed up
in the part B by turning the handwheel C2 so as to withdraw the inner end of the
said tubular piece from the shoulder and a passage is thus left for the fluid to
pass to the outlet a². In order to close the valve, the inner part C must first be
screwed back into its original position so that its inner end comes into contact with
the shoulder and the rod E is then moved so that its end enters the outlet orifice a³
so as to effectually close the passage through the valve.
I have described the parts of the valve as being cylindrical but I do not limit
myself to that form as it will be evident that they may be of other shape provided
they can be moved longitudinally as described. I have also described the part E
as being inside the part C but I do not limit myself to this as I may vary the
arrangement of the parts for instance as illustrated in vertical section and plan in
Figures 2 and 3 of the drawings which shews the arrangement as adapted more
especially for hydraulic valves for high pressure.
A and B are castings having ears S S on them by which they are bolted together.
They are bored accurately through their combined lengths the circular recesses a
and a and that required for the hat leather e are also bored out and the holes a a²
are formed to communicate with the outlet and inlet pipes. The spindle fits
accurately into the bore through B and C and consists of two pieces E and C held
together by a turned pin F which is screwed at both ends, the upper screw fitting
into the female screw in E, and the lower screw fitting into a nut G which with the
washer and the collar f³ holds the part C firmly, the washer having a projection f¹
sliding between ears or guides (one of which is seen at H) on the casting A and
stud pins fitting into holes in the lower end of the part C, prevent the latter
from turning round when the part E is rotated by the handle or wheel fixed on its
upper end (not shewn). The faces of the parts E and C which meet, are turned so
truly that when brought into contact by E being screwed down no fluid can pass

page_text: between them. In the drawing the spindle is shewn at its highest point, and by
unscrewing E it will be drawn apart from C and the fluid under pressure will pass
through a and the circular recess at, then between E and F down the circular
passage between F and C escaping through holes e in C into the space as and so
into a and the discharge pipe. To close the valve, E will be screwed down on C
and the whole spindle will be pressed down by a lever or the like (not shewn) until
the joint between E and C is below the hat leather e and free from pressure, when
there will be no available opening for the fluid (whatever the pressure exerted) to
escape as E presents a solid surface and is defended from leakage by the hat
leather e (held tightly between B and A by the bolts through the ears S S) and
the leather strip wrapped round in the groove e. A similar groove is turned
in C at c to prevent any possible leakage downwards.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
First The combination with a valve of a screen which can be moved into
position to protect the packing as it crosses the passage through the valve
substantially as hereinbefore described.
Second-The combination in a valve of a casing with an inlet and outlet for the
fluid and containing longitudinally packed pieces such as C and E the one piece
acting as a screen for protecting the packing and the other piece acting as the
closing device of the valve substantially as hereinbefore described.
Third The several arrangements and combinations of parts constituting the
valves substantially as hereinbefore described and shewn in Figure 1 and in
Figures 2 and 3 of the accompanying drawing.
Dated the 15th day of June 1891.
J. H. JOHNSON & Co.,
Agents.