AN IMPROVED VALVE
Year: 1856

page_text: LETTERS PATENT to Louis Guillaume Perreaux, of 16, Rue M. Le Prince,
in the City of Paris, and Empire of France, Engineer, for the Invention
of "AN IMPROVED VALVE."
PROVISIONAL SPECIFICATION left by the said Louis Guillaume Perreaux
at the Office of the Commissioners of Patents, with his Petition, on the
8th May 1856.
I, LOUIS GUILLAUME PERREAUX, do hereby declare the nature of the said
Invention for AN IMPROVED VALVE, to be as follows:-
My improved valve consists of a short passage of vulcanized caoutchone or
other suitable flexible material, of a certain peculiar form, somewhat resembling
the mouth-piece of the musical instrument called a hautboy.
Figure 1 of the accompanying Drawing is a front view or elevation of one
of my improved valves; Figure 2 is a transverse section, and Figure 3 is a
The lower
longitudinal section of the same; Figure 4 is a plan of the same.
part A of this passage may be cylindrical, but the upper part B is of a flattened
or chisel-shaped form. The thickness of the sides of the upper part diminishes
gradually to the top, where the two sides meet, and form two lips, which when
the valve is in a state of rest are in close contact, and prevent the downward
passage of any fluid; with any upward pressure these lips freely separate and

page_text: allow of the upward passage of the fluid. The gradual diminution in thickness
or tapering of the sides forming the lips of this passage enables this valve to
open and close with very slight variations of pressure, and at the same time, by
properly proportioning its parts, it is rendered capable of resisting great
downward pressure. The valve may be made with flanges C, D, for fixing,
or it may be fixed in any other convenient manner and in any position.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Louis Guillaume Perreaux in the Great Seal Patent Office
on the 4th November 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LOUIS
GUILLAUME PERREAUX, 16, Rue M. Le Prince, in the City of Paris, and
Empire of France, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of May, in the year of our Lord One
thousand eight hundred and fifty-six, in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Louis Guillaume Perreaux, Her special licence that I, the said Louis
Guillaume Perreaux, my executors, administrators, and assigns, or such others
as I, the said Louis Guillaume Perreaux, 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 IMPROVED VALVE," upon the condition (amongst others) that I; the said
Louis Guillaume Perreaux, my executors or adminstrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly 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 Louis Guillaume Perreaux, 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 :-
:
My Invention of an improved valve consists in a short passage of vulcanized
cachouc or other suitable flexible material, of a certain peculiar form, somewhat

page_text: resembling the mouth piece of the musical instrument called a boutbey. The
form of this passage is. such, that it allows a fluid to pass through it in one
direction only. But in order that my Invention may be clearly understood
I will proceed particularly to describe the same; reference being had to the
accompanying Drawings.
resemoning the mouthpiece
form of this passage is. such, that it allows a fluid to pass through it in one
direction only. But in order that my Invention may be clearly understood
I will proceed particularly to describe the same, reference being: had to the
accompanying Drawings.
:
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shows a front elevation of one of my improved valves as constructed
for the purpose of the piston valve of a lift pump; Fig. 2, a side elevation of
the same; Fig. 7, a plan of Fig. 1; Fig. 6, a plan of Fig. 2 inverted;
Fig. 4, a longitudinal section of the same valve; Fig. 9, a plan of Fig. 4;
Fig. 5, a transverse section of the valve when closed; Fig. 10, a plan of
Fig. 5; Fig. 11, a transverse section of the valve when open; Fig. 12, a plan
of Fig. 11; Fig. 3 shows a side elevation of the same valve attached to the
piston rod of a lift pump; Fig. 8 a plan of Fig. 3; Fig. 13, a transverse
section of one of my improved valves as constructed for the foot or cylinder
valve of a pump; Fig. 14, a side elevation of the same; Fig. 15, a plan of
Fig. 14; Fig. 16, a plan of Fig. 14 inverted; Fig. 17, a section of a portion
of a lift pump, shewing the application of both the piston and foot or cylinder
valves. In all these Figures the same letters of reference are employed to
denote corresponding parts.
A is the interior of the short passage of vulcanized cachouc; B, the wall
forming this passage. This wall it will be seen is made gradually to taper
upwards from its base at C, C, till it terminates in two long narrow lips at
D, D; these lips remain in easy contact so long as the valves is at rest, and
are only more firmly compressed together by any downward pressure of the
fluid in contact with them, but they separate freely to allow the passage of
any upward current of the same fluid. The other parts of this valve by which
it is secured in its place may be variously modified to suit the particular
purpose for which it is required. When it is to be employed as the piston
valve in a lift pump of moderate size, I prefer to construct it and the piston
G of one piece of vulcanized cachouc (see Figs. 1, 2, 4, 5, and 11). The
mode in which this piston is then connected with the piston rod will readily
be seen by reference to Fig. 3, in which E is the piston rod; E', E', a stirrup-
formed iron, which connects the piston rod E with the metal hoop E". To
connect this valve and piston with the piston rod E, it is only necessary to
compress the piston G within the metal hoop E", which is made to fit
accurately between the flanges G¹, G', on the piston G', which is thus retained

page_text: in position by its own elasticity. These flanges G¹, G³, are made to fit and
press upon the interior of the cylinder of the pump, as shown in Fig. 17.
Where my improved valve is to be employed as the foot or cylinder valve of
of a pump or to a similar use, I prefer to construct it as shown in Figs. 13,
14, 15, and 16, with a wide shalow flange II, HI, which then serves both to
secure the valve in its place, and also as a washer for the joint which connects
the cylinder I with the suction pipe K.
In witness whereof, I, the said Louis Guillaume Perreaux, have hereunto
set my hand and seal, this Thirtieth day of October, in the year of
our Lord One thousand eight hundred and fifty-six.
:
LOUIS GUILLAUME PERREAUX. (L.S.)