A New or Improved Gauge or Device for Measuring the Rate of Flow of Water from Outlets or Through Pipes.
Year: 1898

page_text: A New or Improved Gauge or Device for Measuring the Rate of Flow
of Water from Outlets or Through Pipes.
I, ERNEST SAMUEL PRENTICE, of "Greystoke," The Avenue, Surbiton, in the
County of Surrey, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to a new or improved gauge or device for measuring the
rate of flow of water from outlets or through pipes.
Said device is mounted or arranged in or on or in connection with a short
length of pipe adapted to be readily coupled or connected to an outlet or at any
other suitable point in or on a water pipe conduit or supply in suchwise that the
flow of water is directed through said short length of pipe in which latter is in-
serted a small pipe (which I will term the " gauge pipe) the open end of which
is fixed facing the flow of water and in a line parallel with the line of flow at this
point so that the water tends to flow direct into this gauge pipe which latter
may advantageously be mounted at a point about midway between the centre and
side of said short length of pipe on the exterior of which latter is supported or
mounted a mercury or other suitable pressure gauge to which the other end of
said gauge pipe leads. The said gauge being calibrated or provided with any
suitable scale indicator or index.
The operation is as follows:-
:-
As the water flows past the said gauge pipe it will flow into or tend to flow
into same, and according to the rate or velocity of the water's flow so will pres-
sure of the water in said gauge pipe be transmitted to said gauge and thereby
the latter will indicate the velocity of flow.
As a modification of the foregoing arrangement I may use a gauge or device
which is brought into equilibrium by the pressure of the water in the main pipe
or conduit that is to say the gauge pipe would be inserted so as to face the How
of the water as before described and led to a gauge or device from which latter
for the purpose of neutralising the effect of the hydrostatic pressure in the gauge
I lead another connection back to the water conduit for instance I may use a
pipe led from the top of the mercurial gauge or device back to and entering the
said water conduit (advantageously at right angles to the latter so as to receive
pressure of the water in said conduit but so as not to be affected by the flow) and
thus when no flow of water is taking place through the conduit or main pipe this
gauge or device is in equilibrium and indicates
no flow" while directly any
flow of water takes place past the aforesaid gauge pipe end thereby the rate of
flow will be indicated as hereinbefore described.
6
It will be obvious that if desired my aforesaid invention may be permanently

page_text: arranged or mounted in the water main or other water pipe instead of being
mounted in a short detachable length of pipe as aforesaid.
Dated this 14th day of June 1898.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.
A New or Improved Gauge or Device for Measuring the Rate of Flow
of Water from Outlets or Through Pipes.
I, ERNEST SAMUEL PRENTICE, of "Greystoke," The Avenue, Surbiton, in the
County of Surrey, Civil Engineer, do hereby declare the nature of this invention
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 a new or improved gauge or device for measuring the
rate of flow of water from outlets or through pipes.
Said device is mounted or arranged in or on or in connection with a short
length of pipe adapted to be readily coupled or connected to an outlet or at any
other suitable point in or on a water pipe conduit or supply in suchwise that the
flow of water is directed through said short length of pipe in which latter is in-
serted a small pipe (which I will term the " gauge pipe") the open end of which
is fixed facing the flow of water and in a line parallel with the line of flow at this
point so that the water tends to flow direct into this gauge pipe which latter
may advantageously be fixed at that point in the bore of the pipe where it will
receive the mean rate of flow which is at a point usually found about midway
between the centre and side of said short length of pipe on the exterior of which
latter is supported or mounted a Bourdon or mercury or other suitable pressure
gauge to which the other end of said gauge pipe leads. The said gauge being
calibrated or provided with any suitable scale indicator or index.
In the accompanying drawings my invention is illustrated as carried out with
a Bourdon gauge.
A is short length of pipe carrying the device (with Bourdon gauge) for indica-
ting the flow of water according to my present invenfion said pipe A being pro-
vided with ordinary coupling A¹ by which same is coupled or connected to the
main or other water supply pipe B.
C is gauge pipe inserted in the pipe A the open end C of which pipe C is
permanently fixed where the mean rate of flow takes place inside sáid pipe A
and said open end C¹ faces the flow of water through said pipe A.
X is Bourdon pressure gauge to which is coupled at X the connecting pipe D
Feading from the small gauge pipe C direct to the gauge X-in the arrangement
illustrated said pipe D and gauge pipe C are shown fixed to a mount or block E
provided with an annular flange E¹ adapted to be engaged in and by the internally
screw-threaded thimble or coupling F which screws on to the male screw piece Ġ
fixed to the pipe A; by which means the gauge pipe C and its connection can be
readily detached from the short length of pipe A.
The operation is as follows:-
As the water flows past the said gauge pipe C it will flow into or tend to flow
into same and according to the mean rate or velocity of the water's flow so will
pressure of the water in said gauge pipe C be transmitted to said gauge X and
thereby the latter will indicate the mean velocity of flow and thus show direct

page_text: either the head in feet due to velocity and the rate of discharge in gallons per
minute as desired.
As a modification of the foregoing arrangement I may use a gauge or device
which is brought into equilibrium by the pressure of the water in the main pipe
or conduit that is to say the gauge pipe would be inserted so as to face the How
of water as before described and led to a gauge or device from which latter for
the purpose of neutralising the effect of the hydrostatic pressure on the gauge I
lead another connection back to the water conduit for instance I may use a pipe
led from the top of a vertical mercurial gauge or device back to and entering
the said water conduit (advantageously at right angles to the latter so as to
receive pressure of the water in said conduit but so as not to be affected by the
flow) and thus when no flow of water is taking place through the conduit or main
pipe the gauge or device is in equilibrium and indicates "no flow" while directly
any flow of water takes place past the aforesaid gauge pipe-end thereby the rate
of flow will be indicated as herein before described.
It will be obvious that if desired my aforesaid invention may be permanently
or temporarily arranged or mounted in the water main or other water pipe instead
of being mounted in a short detachable length of pipe as aforesaid.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
-
-
1. A gauge or device for measuring the rate of flow of water from outlets or
through pipes consisting of the combination with the pipe through which flows
the water to be measured of a small gauge pipe with its open end facing said
flow and parallel therewith and arranged at that point or points in the bore where
the mean flow occurs, a gauge and a connection leading from said gauge pipe to
said gauge substantially in the manner and for the purposes herein before set
forth.
2. A gauge or device for measuring the rate of flow of water from outlets or
through pipes constructed combined and arranged to act substantially in the
manner and for the purposes hereinbefore set forth.
Tatad 11941
1000
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.