Year: 1888

page_text: Date of Application, 16th July, 1883
Complete Specification Left, 16th Apr., 1889
Complete Specification Accepted, 1st June, 1889
We WALTER GEORGE KENT of 199, 200 and 201, High Holborn, W.C. in the
County of Middlesex, Manufacturer, and HENRY SAMUEL PRICE of 124 Kennington
Lane, in the County of Surrey, Engineer, do hereby declare the nature of this Inven-
tion to be as follows:-
The main object of our invention is to effect improvements in the valve mechanism
of that class of positive liquid meters wherein the principal measuring chamber
consists of a cylinder, or vessel fitted with a reciprocating piston, or other equivalent
device, a supplementary cylinder and piston being employed to operate the valve of
the principal cylinder, while the valve of the supplementary cylinder is operated by
the principal piston.
Our said improved valve mechanism is constructed substantially as follows:-
A small supplementary cylinder is fitted, preferably on the top cover of the
principal or main cylinder and is formed with two valve faces on opposite or adjacent
sides, and provided with a double piston. One of the said valve faces is fitted with
a slide valve operated by the piston of the main cylinder, which said valve controls
the admission of liquid to the small cylinder, and the other valve face is fitted with a
slide valve operated by the small double piston to control the admission of liquid to
the main cylinder.
The small cylinder and its valves are enclosed in a casing fitting on the top of the
main cylinder, which said casing communicates with the inlet, and is always
full of liquid.
The valve faces aforesaid are each provided with three ports, two inlet and one
exhaust, and the valves are preferably of the ordinary steam engine D pattern.
Both the exhaust ports open directly into the small cylinder in the space between
the pistons, and these pistons are connected by a central stem to which an arm is
affixed, which projects through one of the said exhaust ports and operates the valve
controlling the admission to the main cylinder. The piston-rod of the main piston
projects through a liquid-tight stuffing-box, or gland, in the cover and is provided
at its outer end with a flange or projection, which, near each end of the travel,
strikes one of two projecting lugs on the back of the valve controlling the admission
to the small cylinder, and so operates the said valve.

page_text: The inlet ports governed by the above-mentioned valve communicate by means
of suitably arranged passages with the top and bottom of the said cylinder. The
inlet ports in the other valve face communicate also by means of suitably arranged
passages with openings in the top of the main cylinder, which by means of suitable
passages communicate with the top and bottom of the said main cylinder. An
exhaust port is provided in the centre of the small cylinder between its pistons,
communicating by a passage cast in the said cylinder wall with the exhaust or
outlet pipe.
In meters of this class, if the supplementary piston is of small size and packed
sufficiently tightly to prevent leakage, a difficulty is experienced, owing to the small
area of the piston, in working the meter on a low head of water, and as it is
advantageous for many reasons to have the supplementary piston of small size, and
necessary that the meter shall at the same time work on a low head, we construct
the supplementary piston in the following manner: -We pack the said pistons in
any suitable manner, so that they shall work within the cylinder quite freely on a low
head and yet be as liquid-tight as is consistent with such freedom of working, and
we place a washer or disc of leather, rubber or other suitable elastic material
on the inner side of each piston, which at the end of the stroke seats perfectly
liquid-tight upon an annular edge or seating provided, one above and one below the
exhaust port within the cylinder. As the pistons are at rest upon one or other of
the seatings during nearly the whole time of the travel of the main piston, and only
make a short quick movement from one seating to the other just at the end of the
main travel, any leakage past them which may chance to occur during such move-
ment is so slight as to be of no practical consequence.
As a modification of this arrangement, we inay employ a single supplementary
piston working within a cylinder on the cover of the main cylinder. The elastic
washers aforesaid are provided on each side of the piston and seatings for the same
at each end of the cylinder.
In this case the valve of the supplementary cylinder is operated by the main
piston-rod as before, but the valve of the main cylinder is operated by a piston-rod
projecting through a suitable stuffing box or liquid tight gland in the bottom cover
of the supplementary cylinder.
The general action of the apparatus is the same as in positive meters of this
class, and is as follows:-The main piston during the concluding part of its stroke
shifts one of the said slide valves, as before described, and admits the inlet liquid to
one side of the small pistons or piston in the supplementary cylinder. The said
pistons or piston then moves and with it the valve which reverses the ports for the
main cylinder. The main piston then moves back and at the end of the stroke the
above operation is repeated.
In that form of the appartus as first described, the exhaust from both the large
and small cylinders escapes through the aforesaid central exhaust port in the latter
cylinder, and in both forms of the apparatus the liquid reasured at each stroke of
the meter is necessarily the sum of that contained in both cylinders. The recording
mechanism may be operated by the piston-rod of the main cylinder in the usual
manner.
Although we have described our said valve mechanism as applied to an apparatus
intended to operate as a liquid meter, is obvious that such apparatus and valve
mechanism may be constructed to operate as a liquid motor if required.
Dated this 19th JTL 1005
AMBROSE MYALL,
21, Cockspur Street, S.W.,
Agent for the Applicants.

page_text: COM LEID DELICATION.
Improvements in Liquid Meters and Motors.
We, WALTER GEORGE KENT, of 199, 200 and 201 High Holborn, W.C., in the
County of Middlesex, Manufacturer, and HENRY SAMUEL PRICE, of 46 Bonnington
Square, Vauxhall, in the County of Surrey, but late of 124 Kennington Lane, in
the same County, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement :-
The main object of our invention is to effect improvements in the valve mechanism.
of that class of positive liquid meters, wherein the principal measuring chamber
consists of a cylinder or vessel fitted with a reciprocating piston, or other equivalent
device, a supplementary cylinder and piston being employed to operate the valve of
the principal cylinder, while the valve of the supplementary cylinder is operated by
the principal piston.
Our improved valve mechanism is constructed substantially as shewn in the
accompanying three sheets of drawings, in which Fig. 1 is a sectional elevation of
a meter; Fig. 2 is a plan of same; and Fig. 3 is a sectional elevation shewing
certain modifications in the construction of the said meter.
Similar letters of reference denote similar parts throughout the drawings:
A small supplementary cylinder A. which may, if desired, be made in two or more
parts as convenient, is fitted, preferably on the top cover B of the principal or main
cylinder C, and is formed with two valve faces D and E on opposite sides as shewn,
or on adjacent sides, and provided with a double piston F Fi. The valve face D is
fitted with a slide valve H, operated by the piston J of the main cylinder C, which
said valve controls the admission of liquid to the small cylinder A, and the valve
face E is fitted with a slide valve H', preferably of the ordinary steam engine "D
pattern, operated by the small double piston F F¹, to control the admission of liquid
to the main cylinder C. The valve H is kept against the face D by a spring d,
consisting of a strip of vulcanite or other suitable material passed through the
guides S S, and the valve H' is kept against the face E by springs e.
22
The small cylinder and its valves are enclosed in a casing K, fitting on the top of
the main cylinder, or formed in one therewith, as shewn. This casing is closed by
the cover K, which also forms the cover of the said small cylinder. The said casing
communicates with the inlet L and is always full of liquid. The valve face D is
provided with three ports, two inlet D1, D2, and one exhaust ³, and the valve face E
is likewise provided with two inlet ports É¹, E2, and one exhaust E³. The exhaust
ports D³ and E³, open directly into the small cylinder A, in the space M, between
the pistons F, F, and these pistons are connected by a central stem N, to which an
arm P is affixed, which projects through the exhaust port E³ and operates the valve H¹
from its inner, side, the said valve controlling the admission to the main cylinder C.
The piston-rod of the main piston J, projects through a liquid-tight stuffing-box,
or gland R in the cover, and is provided at its outer end with a head S, working

page_text: between guides S¹, S², on the cylinder A and bearing against a guide on the
casing K. This head near each end of the travel, strikes one of the two projecting
lugs T, T, on the back of the valve H, controlling the admission to the small
cylinder A, and so operates the said valve.
The inlet ports D1, D2, governed by the said valve H, communicate with the top
and bottom of the cylinder A. The inlet ports E¹, E², in the other valve. face E
communicate by means of suitably arranged passages V, V₁, with openings in the
top of the main cylinder C, which by means of suitable passages communicate with
the top and bottom of the said main cylinder. An exhaust port shewn in dotted
lines at V2, in the plan Fig. 2 is provided in the centre of the small cylinder
between its pistons, communicating by a passage V³, cast in the said cylinder wall,
with the exhaust, or outlet pipe W.
In meters of this class, if the supplementary piston is of small size and packed
sufficiently tightly to prevent leakage, a difficulty is experienced, owing to the small
area of the piston, in working the meter on a low head of water, and as it is
advantageous for many reasons to have the supplementary piston of small size, and
necessary that the meter shall at the same time work on a low head, we construct the
supplementary piston in the following manner. We form the said pistons with two
rings F, F, of vulcanite, or other suitable material, or in any other suitable manner,
so that they shall work within the cylinder quite freely on a low head and yet be as
liquid-tight as is consistent with such freedom of working, and we place a washer or
disc of leather, rubber, or other suitable elastic material on the inner side of each
such piston, which at the end of the stroke seats perfectly liquid-tight upon one or
other of two annular edges, rims, or seatings Z, Z, provided one above and one
below the exhaust port within the cylinder. As one or other of the pistons is at rest
upon one or other of these seatings nearly the whole time of the travel of the main
piston, and as the pistons F F' only make a short quick movement from one seating
to the other, just at the end of the travel of the main piston J, any leakage past
them which may chance to occur during such short movement is so slight as to be of
no practical importance.
In cases where the meter is of large size, or is not intended to work on a low head
of water, we may however form the pistons F, F1, with cup-leathers in. the ordinary
way and dispense with the washers X, X, and seatings Z, Z.
In the modification of this arrangement, shewn in Fig. 3, we employ a single
supplementary piston F, working within a cylinder A on the cover of the main
cylinder. The elastic washers X, X,, aforesaid, are provided on each side of the
piston F, and seatings Z, Z, for the same at each end of the cylinder. In this case
the valve H of the supplementary cylinder A is operated by the main piston-rod Q,
as before, but the valve H¹ of the main cylinder C, is operated by a piston-rod F?
projecting through a suitable stuffing-box, or liquid tight gland A', in the bottom
cover of the cylinder A.
The general action of both forms of. the apparatus is the same as in positive meters
of this class, and is as follows:-The main piston J, during the concluding part of
its stroke, shifts the slide valve H, as before described, and admits the inlet liquid to
one side of the small pistons F, F, as in Figs. 1 and 2, or piston F as in Fig. 3, in
the supplementary cylinder A. The said pistons, or piston then moves and with it
the valve H, which reverses the ports for the main cylinder C. The main piston then
moves back, and at the end of the stroke the above operation is repeated.
In that form of the apparatus, as first described, the exhaust from both the large
and small cylinders escapes through the aforesaid central exhaust port in the latter
cylinder, and in both forms of the apparatus the liquid measured at each stroke of the
meter is necessarily the sum of that contained in both cylinders. The recording
mechanism is contained in the space Y, and may be operated by the piston-rod Q of
the main cylinder in the usual manner.
Although we bave described our said valve mechanism as applied to an apparatus
intended to operate as a liquid meter, it is obvious that such apparatus and valve
mechanism may be constructed to operate as a liquid motor if required.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In the valve mechanism of that class of positive liquid meters herein described,
a piston for operating the valve of the main cylinder, so constructed as to move
freely within the supplementary cylinder under a low head of water and at each end
of its stroke to seat liquid-tight upon one or two rims or facings provided within the
said cylinder, substantially as and for the purposes herein set forth.
2. In the valve mechanism of that class of positive liquid meters herein described,
a supplementary cylinder A, provided with a double piston F, F1, for operating the
valve of the main cylinder and so arranged that the space M, between the said
pistons F, F, forms a common exhaust chamber for both cylinders.
3. In the valve mechanism of that class of positive liquid meters herein described,
a supplementary cylinder A, made in two or more parts as convenient and provided
with a double piston F, F, for operating the valve of the main cylinder, and having
the valve faces D and E and ports for itself and the main cylinder formed upon or
attached to it, and so arranged that the space M, between the said pistons F, F1, forms
a common exhaust chamber for both cylinders, substantially as herein set forth with
reference to Figs. 1 and 2 of the accompanying drawings.
4. In the valve mechanism of that class of positive liquid meters herein described,
a supplementary cylinder A, provided with a double piston F, F, operating the "D
slide valve of the main cylinder, from its inner, or exhaust side by means of an
arm P on the stem N of the said pistons.
5. In the valve mechanism of that class of positive liquid meters herein described,
a supplementary cylinder A provided with a double piston F, F, for operating the
valve of the main cylinder and having elastic washers X, X, seating upon rims or
facings Z, Z', and so arranged that the space M, between the said pistons F, F¹, forms
a common exhaust chamber for both cylinders, substantially as herein set forth with
reference to Figs. 1 and 2 of the accompanying drawings.
6. In the valve mechanism of that class of positive liquid meters herein described,
a supplementary cylinder A provided with a piston F for operating the valve of the
main cylinder, and having elastic washers X, X, seating upon rims or facings Z, Z,
substantially as herein set forth with reference to Fig. 3 of the accompanying
drawings.
Date : 10L
ր A
1 1000
AMBROSE MYALL,
21, Cockspur Street, London, S.W.,
Agent for the Applicants.