IMPROVEMENTS IN LIQUID METERS OR APPARATUS FOR MEASURING AND REGISTERING THE VOLUME OF WATER OR TAGAD on DramaLOWDER PRESSROUGH
Year: 1867

page_text: LETTERS PATENT to Ernest Marie Du Boys, Government Engineer, of
Paris, France, for the Invention of "IMPROVEMENTS IN LIQUID METERS
OR APPARATUS FOR MEASURING AND REGISTERING THE VOLUME OF WATER OR
TAGAD on Drama "
Sealed the 12th June 1868, and dated the 17th December 1867.
PROVISIONAL SPECIFICATION left by the said Ernest Marie Du Boys
at the Office of the Commissioners of Patents, with his Petition,
on the 17th December 1867.
I, ERNEST MARIR DU BOYS, Government Engineer, of Paris, France, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
LIQUID METERS OR APPARATUS FOR MEASURING AND REGISTERING THE VOLUME OF
WATER OR OTHER LIQUID FLOWING UNDER PRESSURE THROUGH PIPES OR DUCTS," to
be as follows:-
These improvements relate to apparatuses for gauging or measuring and
registering the volume of water or other liquid flowing under pressure through
pipes or other ducts or channels, the same being principally intended for

page_text: gauging water for the supply of cities or other localities, steam boilers, or
other similar purposes.
These improved apparatus consists of, lly, a gauging vessel formed by
means of two hollow shells of cast iron or other suitable. material, and of
exactly the same shape and size bolted together by their rims, the interior
of the vessel thus formed being divided into two chambers by means of,
2ly, a diaphragm or partition consisting of a central rigid metal disc fixed
all round to the inner periphery of an annular washer of india-rubber,
leather, or other suitable flexible impervious material, the outer periphery
of which washer is fixed between the rims of the two shells of the gauging
vessel. 3ly, a four-way or other suitable distributing cock, valve, or slide for
connecting alternately each of the two.. chambers of the gauging vessel
with the entrance or supply and the exit or delivery pipes for the liquid to be
gauged to enter into and leave the gauging vessel. 4ly, either a weight to
be lifted or a spring to be bent by the strain exerted on them by the
diaphragm during its oscillatory motion caused by the pressure of the liquid,
the falling down of the said weight or the relaxing of the spring taking
place on the diaphragm finishing its stroke and causing the distributing
cock shifting position, thereby procuring the reversing of the conditions
of entrance and exit of the liquid into and from the gauging vessel.
5ly, a counter index or registering train for indicating the quantity of
liquid that has passed through the gauging vessel. The diaphragm of the
gauging vessel divides this latter into two chambers or divisions which do not
communicate together, but are each of them provided with an orifice for the
entrance and the exit of the liquid to be gauged. The diaphragm is allowed
to oscillate or move to-and-fro alternately from one shell to the other, and its
shape and size is such that it may without extending apply itself alternately
against the inner surface of each of the two shells. A metal rod or stem is
fixed to and passes through the metal disc of the diaphragm, the said rod
working in stuffing boxes provided in both shells, whilst to each of its ends is
fixed a konb gliding in a guide slot.
The principle of working the apparatuses is as follows:-Supposing the
gauging vessel to be filled with liquid, consequently the diaphragm to be
applied against the inner surface of one of the shells, if this shell be put
in communication with the entrance or supply pipe, and the other shell with
the delivery pipe, the liquid entering into the gauging vessel will act on that
side of the diaphragm facing the entrance, opening with an amount of pressure
exceeding that exerted on the opposite side of the diaphragm by the liquid
existing.in the vessel, this difference in pressure causing the diaphragm to

page_text: advance towards the opposite shell, viz., that in, communication with the
delivery pipe and chase the liquid of this shell into the delivery pipe, which
advancing of the diaphragm will continue until finishing its stroke the same
has become applied against the inner surface of, the said shell from which the
liquid will thus have been expelled; in this moment the distributing cock is, by
the effect of the falling weight or by the relaxing of a bent spring, turned in
such manner so as to reverse the conditions for the entrance and exit of the
liquid into and from the gauging vessel, liquid from the supply pipe will con-
sequently at once enter into the shell just emptied and cause the diaphragm
to move back, viz., in the contrary direction it had moved at the preceding
stroke, thereby driving into the delivery pipe the liquid from the shell which
bad become filled at the said stroke. At each stroke of the diaphragm a
constant quantity of liquid will be allowed to enter into the gauging vessel
whilst an equal quantity is delivered therefrom..
Two arrangements of apparatus may be made use of for obtaining the just
described effects and make the distributing cock at the required moments shift
position for causing the alternate or to-and-fro motion of the diaphragm from
one shell of the gauging vessel to the opposite shell.
S-
In the first of the said apparatuses the weight of the diaphragm and its rod
forms the counterweight above mentioned, and which by the alternate
placement of its centre of gravity, and consequently of that of the moveable
parts of the apparatus, imparts an oscillatory motion to the gauging vessel,
thereby giving rise to the alternate reversing of the conditions of entrance and
exit of the liquid into and from the said vessel, whilst the alternate to-and-fro
motion of the diaphragm from one shell of the vessel to the other is the result
of the excess of pressure existing alternately on one and on the opposite side
of the diaphragm.
In the first apparatus the gauging vessel oscillates by means of two
trunnions in two fixed bearings provided in the frame of the apparatus, one of
the trunnions forms a four-way distributing cock, of which the corresponding
bearing forms the seat, which seat is connected by two ways respectively to the
entrance and exit pipes; the distributing cock is hollow and divided lengthwise
in two chambers, one of which leads into one of the shells of the gauging
vessel, and the other into the opposite shell, and each chamber has too ways,
one of which of each chamber is set alternately in communication with the
entrance pipe, and the opposite way of the other chamber with the exit pipe.
In order that the reversing of the motion of the gauging vessel and of the
diaphragm should take place at the required moments the knob at the corre-
sponding end of the stem of tho diaphragm is allowed to escape from its

page_text: guide slot at the moment the diaphragm having completed its stroke the
reversing of the angular position of the gauging vessel and of the distributing
cock and consequently of the entrance and exit of the liquid into and from the
gauging vessel is to take place.
In the second apparatus the gauging vessel is kept in a fixed position, the
end of the stem of the diaphragm at each oscillation of this latter causes a
counterweight to be lifted, which weight is set free at the moment the
diaphragm having completed its stroke, the reversing of the conditions of
entrance and exit from the liquid into anil from the gauging vessel is to take
place, the falling down of the said weight causing the distributing cock to
shift position accordingly as required. In this apparatus the general arrange-
ment of the distributing cock and its seat is similar to that of the first described
apparatus with this difference only, that the cock does not serve as a trunnion,
and that its seat instead of with two is provided with four ways, one of which
leads into the entrance and another into the exit pipe, whilst the two remain-
ing ones are respectively connected each of them to one of the shells of the
gauging vessel. In both apparatuses the registering of the measured
quantities of liquid is obtained as in other gauging apparatuses of the same
class by the indications on a dial plate of a series of pointers worked by a train
of wheels dependant of the motions of the distributing cock, which latter
might be replaced by suitable distributing valves or slides.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Ernest Marie Du Boys in the Great Seal Patent Office
on the 17th June 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ERNEST
MARIE DU BOYS, Government Engineer, of Paris, France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of December, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Ernest Marie Du Boys, Her special licence that I, the said Ernest Marie
Du Boys, my executors, administrators, and assigns, or such others as I, the
said Ernest Marie Du Boys, 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

page_text: Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN LIQUID METERS OR APPARATUS FOR MEASURING AND REGISTERING THE
VOLUME OF WATER OR OTHER LIQUID FLOWING UNDER PRESSURE THROUGH PIPES
OR DUCTS," upon the condition (amongst others) that I, the said Ernest
Marie Du Boys, my executors or administrators, by an instrument 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 immediately.
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Ernest Marie Du Boys, do hereby declare
the nature of my said Invention, and in what mauner the same is to be per-:
formed, to be particularly described and ascertained in and by the following.
statement:-
These improvements relate to apparatuses for gauging or measuring and
registering the volume of water or other liquid flowing under pressure through.
pipes or other ducts or channels, though the said apparatuses are principally
intended for gauging water for the supply of cities or other localities, of steam
boilers or for other similar purpo es, in consequence of which I will in this
description more especially relate to meters for gauging water supplies.
In the annexed Drawings two descriptions of meters arranged according to
my Invention are represented, viz., a rocking or oscillating and a fixed meter;
the principal parts being similar in both apparatuses whilst their mode of
operating is based on the same principle, as will be explained in these
Drawings.
Fig. 1 represents an outside or elevation view of the rocking or oscillating.
meter of which Fig. 2 shows a horizontal sectional and Fig. 10 a front
elevation view of the index or registering apparatus; Fig. 3 is a front elevation
and Fig. 4 a vertical sectional view of the fixed meter; the Fig. 5 represents.
a sectional view of a slide valve which may be made use of instead of the
distributing or reversing cock hereafter to be described; the Figs. 7 & 8..
show two elevation views (Fig. 7 partly in section) of an arrangement in
which the water jerk or hydraulic shock is made subservient for working the
cock or valves for reversing the conditions of entrance and exit of the water
into and from the meter; Fig. 9 shows a separate part of this arrangement.
In these Figures corresponding parts are marked with the same letters of
reference.
•
The oscillating as well as the fixed meter consists chiefly of the following

page_text: circular shape, the interior of which is divided in to parts or compartments
by, 2ly, a flexible diaphragm D to which latter a regular to-and-fro motion
is to be communicated. 3ly, a reversing or distributing cock R which may
be replaced by one of the arrangements of valves represented in the Figs. 5
and 6, this cock or these valves serve for alternately putting either of the
two compartments of the gauger in communication with the entrance main
pipe G for the admission of the water into the meter and with the delivery
main pipe H for the exit of the gauged water. 4ly, a balance weight to be
lifted or a spring to be bendt by the effect of the diaphragm D, when this latter
is moved forward and backward in the gauger in consequence of the pressure
of the water entering into this latter, which weight is set free or which spring
relaxes as the diaphragm is completing its stroke, and thereby works the cock
or the valves for procuring the reversing of the conditions of entrance and exit
of the water into and from the gauger; or instead of being obtained through
the medium of a weight or a spring, the reversing of the cock or of the valves
may be procured by the jerk of the water or hydraulic shock by means of the
arrangement shown in the Figs. 7, 8, & 9. 5ly, a counter index or
registering train suitably connected to and worked by the diaphragm, the
reversing cock or valves or any other suitable part having a regular motion
imparted to it, which index or counter is of a construction similar to that of
other apparatus of the same class so as to show by the position of hands and
dials or other suitable means the number of times the gauger, the capacity of
which has been duly ascertained, has been what may be called filled and
emptied, viz. the quantity of water passed through it. I must at once observe
here that in my improved meters the gauging vessel A and its diaphragm act in
a manner similar to a pump cylinder and its piston, by which they might if
wished be replaced without in any way changing the principle of working of
the apparatus; the particular shape however of the gauging vessel presents
the great advantage of not giving rise to any noticeable resistance in the
working of the diaphragm, and consequently to any loss of pressure in the
water, whilst at the same time the arrangement offers a perfect tightness or
freedom of leakage and is of a very simple and easy construction. The
gauging vessel or gauger A consists of two shallow shells A¹ & A³, of cast
iron or other suitable metal, and of exactly of the same shape and size, by
preference the shape of the interior of these shells is that of a truncated cone
1, 2, 3, 4, the top part 2, 3, of which may be either straight or suitably curved;
at the base each shell is provided with a rim or flange a by means of which
the two shells are bolted together so as to form one vessel A; each of the
shells has a passage a¹ & a³ for the in and outlet of the water, which passages

page_text: communicate respectively by means of the pipes E¹ & E³ with the cock R
(or valves, in case these latter are made use of) which cock (or valves) com-
municates with the inlet main pipe G and with the exit main pipe H. The.
diaphragm D consists of a central rigid disc d of cast iron or other suitable.
metal connected water-tight all round to a cap d' of india-rubber, oiled leather,,
or other suitable supple impervious material which will yield without extending
or contracting to the pressure of the water and apply itself alternately and,
fit against the conical inside 1, 2, 3, 4, of each shell; the larger or outer
periphery of the cap d' is inserted and held perfectly water-tight between the
flanges a of the two shells. A rod T working in stuffing boxes A³ passes
through and is fixed in the centre of the disc d and serves as a guide for the
diaphragm D as this latter is moving alternately, from one shell into the
other; this rod T procures the working of the cock R (or valves) for causing
at the end of each stroke of the diaphragm the reversing of the conditions of
entrance and exit of the water into and from the gauger A. The principle
of working of the apparatus may now be easily understood supposing the
gauger to be filled with water and consequently the diaphragm D applied
against the inner surface of one of the shells, if in that moment this shell be
by means of the cock R (or valves) connected with the entrance main G
and the opposite shell with the exit main H, it will be evident that in
consequence of the water head the pressure of the water on the side of
the diaphragm facing the entrance port exceeding the pressure on the
opposite side of the diaphragm, this latter will be compelled by this
difference of pressure of advancing towards the shell connected in that
moment with the exit main, and thereby drive the water out of this latter
into the exit main which will continue until the diaphragm D having completed
its stroke has applied itself against the inner surface of this latter shell,
whereas the water entering into the gauger behind the diaphragm and which
water is to be expelled at the next or return stroke of this diaphragm will fill
the gauger in the same measure as the water at the other side of the diaphragm
is expelled from the gauger; if consequently at the end of the stroke of the dia-
phragm the communication of the of the shells respectively with the entrance and,
exit means be reversed by means of the cock R (or the valves) the diaphragm
will at once begin its return stroke in exactly the same manner as has been,
just described for the forward stroke. At each stroke of the diaphragm Da
constant volume of water will consequently be allowed of entering into the
gauger by one of the shells, whereas an equal volume will at the same time be
expelled by the opposite shell, these volumes being entirely independant from.
the pressure or water head.

page_text: I will now explain in what manner the reversing of the entrance and exit
conditions for the water to be gauged is obtained either by means of the
reversing cock R, or of the arrangements of valves hereafter to be described,
and also in what manner the said cock or valves are actuated either by the
effect of a weight, a spring, or by that of the water jerk or bydraulic shock.
In the apparatus of Figs. 1 & 2, the impelling weight consists of that of the
diaphragm D and its rod T; the gauger A is suspended and oscillates between
two standards by means of its two trunnions, which latter are situated
opposite each other, whilst one of them forms the reversing cock R, and turns
in its sent R¹, forming bearing in the standard, which seat is provided with two
ports g & h, respectively leading into the entrance and delivery mains G & H.
In the apparatus of Figs. 3 & 4 the gauger is fixed on the bed plate A and the
impelling weight for driving the reversing cock R (or valves), consist of a sort
of pendulum weight P situated at the outside of the gauger A. I will now more
particularly describe the arrangement and mode of working of both apparatuses.
Oscillating meter, Figs. 1 & 2. The seat R¹ of the reversing cock R leads
by means of the ports g & h into the entrance and exit mains G & H which
form one of the standards. The cock R is hollow and divided by the
partition R into two compartments M & N, the one M forming the
continuation of the pipe E', and thereby leading into the shell A³ of the
gauger, whereas the other compartment N forms the continuation of the
pipe E leading into the opposite shell A, each of these compartments has
two ways m & n¹, and n & n¹, situated in such manner that if one of the
ways, that m, for instance, of the compartment M be caused to open into
the port of the seat R³, the corresponding way n of the other compartment
N will open into the port 9, whereas the ways m³ and n¹ will be shut, whereas
in the opposite position of the gauger the reverse will take place, namely,
the ways m¹ & n' respectively put the maius G & H, by means of the
compartments M & N and pipes E¹ & E, in communication with the shells
A&A, and the ways m & n be shut. The ports 9 & h, and the ways m,
m³, n & n¹ are all of the same size, whilst the ports m³ & n³ respectively
situated between the ways m & n³, and m³ & n, are made a little larger
than these ways in order that in turning the cock R the entire of the ways
and ports be shut during a certain moment, whilst in order to prevent the
dangerous effect of the jerking of the water or hydraulic shock, which will
necessarily take place in that moment, the entrance and exit mains G & H,
are in the manner as shown in Fig. 3 connected by a pipe W provided with
a box or vessel Win-the interior of which a diaphragm of india-rubber or
other suitable elastic material forms a separation between the water of the

page_text: two mains G & H, which diaphragm in yielding to the water jerk will thereby
annihilate the dangerous effect of this latter. It will be easily understood how
in consequence of this arrangement of the cock R, and of the mode of working
of the diaphragm D, the two compartments of the gauger will simultaneously
be put in communication, one of them with the entrance main G and the
other with the exit main H, and also in what manner the reversing of the:
cominunications is produced by the reciprocating rotary motion imparted to
the cock R in consequence of the oscillating motion of the gauger A of which
latter this cock forms part. If now the apparatus be arranged in such:
manner that 1ly, the reciprocating oscillating motion of the gauger causes
this latter to be set alternately in the required angular or inclined position.;
2ly, the oscillating parts be equilibrated in such manner that. on the
diaphragm reaching the middle of its stroke its centre of gravity be situated on:
the axis of rotation, and 3ly, the weight of the diaphragm D and rod T be
such that on reaching the end of each stroke they procure the turning of the
gauger and overcome the resistance presented to the oscillation of this latter,
the return oscillation of the gauger will take place spontaneously at each
time the diaphragm D completes its stroke, in consequence of which a
continuous uninterrupted flow of water through the gauger will be kept up as
long as the entrance and exit of the water through the mains G & H remains.
free. But as the apparatus requires also to offer an exact measurement of:
the volume of water which has passed through the gauger it is necessary each
oscillation should correspond with the delivery of a constant quantity of water
in consequence of which it is required the impelling weight should cause
the return oscillation of the gauger to begin always exactly at the very,
moment the diaphragm reaches the end of its stroke. In order to obtain:
this a nut is screwed on each end of the rod T, which nut after each stroke
or oscillation of the gauger enters into a slot ¹ of a block Z fixed on the bed
plate A3, which slot serves as a guide for the nut to glide in, the nut & being
prevented from leaving the slot until reaching the end of this latter which
takes place at the moment the diaphragm D reaches the end of its stroke in:
the gauger, consequently during the time the nut z is engaged in the slot &¹
the gauger will be prevented from turning, whereas this turning will take
place immediately the nut z leaves the slot 2. In the oscillating meter the
rod T protrudes at both ends of the gauger A and the two nuts of this rod
will by turn enter into the slot 2 of their respective blocks Z which latter
are fixed symetrically at both sides of the apparatus, but the rod T might be
made to protrude only at one end, viz., in the manner as shewn in Fig. 4 for
the fixed meter, in which case the blocks Z are to be placed both at the

page_text: same side of the apparatus, viz., one above and the other below, the horizontal
plane passing through the centre of rotation. The weight of the rod T and
nuts and that of the diaphragm form together the impelling weight,.
two buffers X of india-rubber or other suitable elastic material serve for
checking the motion of the gauger at the end of each oscillation, the entire
apparatus is set on a bed plate A*; Fig. 10 shows a front view of the index.
or registering apparatus which is arranged in the same manner as other
apparatuses of the same class and may be fitted on any suitable part of the
reversing cock R to which latter is fixed an arm S provided with a segmental
slide S¹, in the slot of which works the knob b of a small rod B jointed to a
lever arm B', having its fulcrum at B³, which, lever arm B¹ may be made to
act, on the train of wheels of the registering part or index C by any suitable
mechanical means for causing the index hands to mark on the dials the number
of oscillations of the gauger.
Fixed meter, Figs. 3 & 4.-In this meter the gauging vessel A is kept
in a fixed position on the bed plate A³. The cock R divided in two compart-
ments M & N by a partition R has four ways r¹, r³, 3, and 4, of equal
size leading respectively into the entrance and exit mains G & H, and into.
the pipes E¹ & E³, which latter correspond with the shells A¹ & A³ of the
gauger A. This arrangement allows of by suitably turning the cock R to put.
alternately one of the shells in connection with the entrance main, and the
opposite shell in connection with the exit main. The arrangement by which
the turning of the cock R is made dependant of the alternate to-and-fro
motion of the diaphragm D, and thus allow the water head of procuring this
to-and-fro motion of the diaphragm is as follows:-On the axis of the cock s
is. fixed a crank arm. connected to a rod F provided towards its free end
with a tappet q which by the effect of a spring q' and friction roller q³ is pressed
against the curved end or are s¹ of an arms fixed to an arbor o¹, this latter
situated parallel with the axis of the cock R and turning in bearings in the
brackets o. To the arbor o¹ are also fixed two other arms t and p, the free
end of which latter carries a balance weight P which may be set more or less
far on the arm p. The curve or arc s' is a little swollen out towards the
middle of its length so as to project upwards a little beyond the free end of
the tapppet q. To the free end of the rod T of the diaphragm D is fixed a
cross piece e. The axial line of the arbor O' is situated exactly above the
middle of the entire length of the stroke which the cross piece e performs
during the to-and-fro motion of the diaphragm D. The lower end of the.
arm t. forms a fork in which works the rod T, whilst the cross piece e
in pressing alternately against one or the opposite side of the fork t¹ drives the

page_text: armt alternately forward and backward, viz., from the middle to one end of
its stroke, in which latter position the free end of the fork is allowed to pass
over the cross piece e, and thus becoming liberated from the effect of this
latter the fork will be carried back into the vertical position or middle of.its
stroke by the balance weight P falling down into this latter position. The
cross piece e in performing its return stroke will again press against the fork,
and thereby lift the weight P and carry the arm t to the end of its return
stroke. The length of the arm t and of the fork t¹ is to be calculated in such
manner that at the moment the rod T and its cross piece e reach the end of.
their stroke the fork becoming liberated from the said cross piece the weight P
and the arm t return to the vertical position. At the moment the fork t¹.is
to be liberated from the cross piece e the rod F is resting on the arc S¹, which
latter is in that moment situated entirely on one side of the tappet g, such.
for instance as shown in Fig. 4, but the moment the fork t¹ becomes liberated
from the cross piece e the balance weight P falling back into the vertical:
position causes the arc-s¹ to press against the tappet q thus throws back.the
rod F, which procures the turning of the cock, after which the tappet 9 glides
over the arc still this latter reaches the position shown in red lines in Fig. 4,:
which position corresponds with the moment the diaphragm being arrived.at:
the end of its stroke the cock R is to be turned back in order to reverse the
conditions of entrance and exit of the water and carry the diaphragm D back.
to its original position. The swelling of the are s³ must be such as to allow
this arc of driving the tappet q forward during one half of the stroke and allow
this tappet of gliding over the are s¹ during the remainder of the stroke;
namely, until the balance weight has reached the vertical position whether
advancing or receding.
Fig. 5 shows a slide valve; and Fig. 6 an arrangement of plug valves
which may be made use of instead of the reversing cock R. In Fig 5, Q
represents an ordinary slide valve situated in a box Q connected to the exit
main H, whilst G shows the entrance main, and E¹ & E³, the pipes respectively
leading into the shells A¹ & A³ of the gauger; the back of the slide Q is
provided with a rack S³ in gear with a pinion S3 which is by any suitable
mechanical means, (such for instance as represented in Fig. 4 in respect to
the cock R) connected to the rod T of the diaphragm D so as to make this rod
cause the pinion S turn alternately in one and in the opposite direction
according as required for moving the slide Q forward and backward and
thus alternately put one or the other of the pipes E' and E2 in connection
with the entrance and the other with the exit main. In Fig. 5 the slide Qis
shown in the position in which the pipe E is connected with the .entrance

page_text: main G and consequently allow the water to enter into the shell A³, whereas
the pipe E allows the water contained in the opposite shell A¹ of becoming
expelled therefrom and pass into the exit main H, during the return stroke
of the diaphragm D the reverse takes place, namely, the pinion S³ having
carried. the slide Q backwards, the pipe E¹ will now be connected with the
entrance and the pipe E³ with the exit main H. Fig. 6 shows an arrangement
plug or piston valves which may be made use of instead of the cock R or the:
slide valve of Fig. 5. In this arrangement the entrance main G is connected
by the tubular parts G¹ and G³ to the pipes E¹ & E' respectively leading into:
the shells A & A² of the gauger, whereas the exit main H is connected by
the pipes H & H³, the chambers I & I² and the tubular parts G³ & G*
respectively to the pipes E¹ & E³.. J is a rod provided at the required distance:
apart with two plugs or pistons J¹ & J' respectively fitting into the tubular
parts G & G and G & G. The rod J is connected to the rod T of the
diaphragm D of the gauger by any suitable mechanical means such for
instance as the arrangement described in respect to Figs. 3 & 4 for imparting
the required to-and-fro motion to the cock R, the rod J will consequently.
receive a regular to-and-fro motion corresponding with that of the diaphragm D,
and thereby drive the plugs J' & J' alternately forward and backward so as to
put the pipes E¹ & E³ alternately in connection with the entrance and:
exit mains, and thus produce the same result as when employing the cock R.
or the slide valve Q. Thus for instance in the position. shown in Fig. 6 the
water arriving by the entrance main G enters through G³ & E' into the shell
A', whereas the water contained in the opposite shell A¹ and which is
consequently to be expelled therefrom passes through E¹, G³, I', & H¹, into
the exit main H. The return stroke of the diaphragm D causing the rod J.
and plugs J & J³, to recede so as to carry these plugs respectively into the
tubular parts G and G³, the water from the entrance main G will in this latter
position pass through the tubular G' and pipe E' into the shell A', whereas the
water from the opposite shell A³ will now leave this latter by the pipe E³, the
tubular part G, the chamber I', and enter by the pipe H³ into the exit main
H. In the arrangements of. Figs. 5 & 6 the to-and-fro motion of the slide Q
& pinion S' or that of the rod J is to be connected by any suitable mechanical
means to a counter or index for registering the number of strokes performed
by these parts, and consequently by the diaphragm D of the gauger.
In the gauging apparatuses above described the impelling force for turning
the cock R or cause the to-and-fro motions of the slide or rod J so as to
invert at each stroke of the diaphragm D the conditions of entrance and exit
of the water into and from the gauger consists in the weight of the diaphragm

page_text: D and rod T in the arrangement of Figs. 1 & 2 and in a balance weight P in
the arrangement of Figs. 3 & 4; it will be readily understood that this
impelling weight might be replaced by a spring to be bent by the advancing
stroke of the diaphragm, and thereby turn the cock R or move the valves in
one direction, and which spring relaxing during the opposite or return stroke
of the diaphragm D would cause the cock R of turning or the valves of
moving in the opposite direction.
The arrangement represented respectively in front and in side elevation
(partly sectional) views in the Figs. 7 & 8 may be resorted to for causing
the turning of the cock R or the moving of the valves, and consequently the
reversing of the conditions of entrance and exit of the water into and from the
meter, to be obtained by the effect of the jerk of the water or hydraulic shock
occurring at each reversing. In this arrangement the chamber V¹ of the tube
V which connects the entrance main G. with the exit main H is provided in
the inside with a stout diaphragm U of india-rubber bolted between the
flanges of the two shells V & V of this chamber V; to this diaphragm.
arranged in a manner similar to that D of the gauger A is fixed a rod U³
gliding in guides Us and Us and provided with a sort of pawl or detent v which
during the downward motion of the rod U is allowed of turning upwards
round a piu; the axis R' of the reversing cock R passes through a stuffing
box R and chamber R, and to this axis R' is fixed a four-armed wheel V*, the
arms w³, ws, w³, w, of which situated at equal, distances apart may in turn
be taken hold of by the detent when by the water jerk the diaphragm U
and consequently the rod U¹ and detent vare lifted so as to cause the said
detent of driving upwards the arm (in Fig. 7 that w¹) situated in that
moment in the required position, the wheel Vs will consequently be caused to
turn in the direction shown by the arrow and turn for a quarter of a revolution
at each time the detent performs its upward motion whilst a small four-
toothed wheels, Fig 9, is fitted on the axis R' of the cock R, against which
wheel
presses a spring provided at its upper or free end with a wedge
piece for the purpose of forcing the wheel 75 and consequently the axis R*
and wheel V² of completing an angle of 90° at each turning even if the
impelling force derived from the water jerk or bydraulic shock would not have
been sufficiently intense for causing the detent v to carry the wheel V* fully
through an arc of 90°. In this arrangement a continuous rotary instead of a
to-and-fro rotary motion is imparted to the cock R, which motion may by
means of a tooth wheel Ws, fitted on the axis R* of the cock R, be transmitted
at once to the first wheel of the registering train of the index C.
I wish to observe here that instead of having in the fixed meter (Figs. 3 &

page_text: 4) the gauging vessel situated in the vertical position the same might be
placed horizontally or in any suitable angular position, in which case the
weight of the diaphragm and rod aught necessarily to be properly balanced
by a weight fixed to a chain or string passing over a pulley or other suitable
means.
Having thus described the nature of my Invention and the manner in
which the same is or may be put into effect, I would have it understood that
various modifications may be made therein without departing from the main
principles of the Invention, and that I do not claim the mechanical parts
separately; but what I consider to be novel and original, and consequently
'claim as the Invention secured to me by the herein-before in part recited
Letters Patent is, the general arrangement and combination of parts of the
therein described apparatuses for measuring and registering the volume
of water or other liquid flowing under pressure through pipes or ducts.
In witness whereof, I, the said Ernest Marie Du Boys, have hereunto
set my hand and seal, this Eleventh day of June, in the year of our
Lord One thousand eight hundred and sixty-eight.
DAYZA