IMPROVEMENTS IN FLUID METERS OR MOTORS
Year: 1887

page_text: Date of Application, 19th Feb., 1887
Complete Left, 18th Nov., 1887
Complete Accepted, 20th Dec., 1887
I, HERBERT FROST of Tipping Street, Ardwick, Manchester, in the County of
Lancaster, Engineer and Manager of the Manchester Water Meter Company Limited,
do hereby declare the nature of said Invention for IMPROVEMENTS IN FLUID METERS
OR MOTORS to be as follows:-
--
My Invention relates to the Invention for which Letters Patent No. 2720 wore
granted to me on the 31st day of May 1883 and the objects of my present Invention
are to simplify the construction reduce the cost and secure the parts of the valvular
arrangement more firmly together than heretofore.
In carrying my Invention into effect I cast the two supplementary cylinders as
well as their ingress egress and discharge ports in one piece in place of making
them in separate pieces as described in the Patent referred to.
In the said Patent the various ports and passages for the main slide and the
supplementary valves were described as cast or contained in one block and each
supplementary cylinder was a separate piece.
I now as above mentioned cast the ports and passages for the supplementary valve
in one piece with the supplementary cylinder, the ports and passages for the main
valve being cast in one piece with the middle or other convenient portion of the
body of the meter.
In some cases it may be advisable to make the main valve and the ports and
passages therefor in a separate casting.
By my Invention I am enabled to cast in one casting several parts of the valvular
arrangements which have hitherto been cast separately.
My improved construction of valves economises space and so allows the meter to
be made smaller without diminishing its measuring capacity or if preferred larger
supplementary cylinders than at present can be employed without increasing the size
of the meter.

page_text: Improvements in Fluid Meters or Motors.
I, HERBERT FROST of Tipping Street Ardwick Manchester in the County of
Lancaster Engineer and Manager of the Manchester Water Meter Company Limited,
do hereby declare the nature of said Invention for IMPROVEMENTS IN FLUID METERS
OR MOTORS, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My Invention relates to the Invention for which Letters Patent No. 2720 were
granted to me on the 31st day of May 1883 and the objects of my present Invention
are to simplify the construction, reduce the cost, and secure the parts of the valvular
arrangement more firmly together than heretofore.
In carrying my Invention into effect I cast the two supplementary cylinders as
well as their ingress egress and discharge ports and passages for the supplementary
valve in ono piece, in place of making them in separate pieces as described in the
Patent referred to. The ports and passages for the main valve are cast with or
fixed as a separate piece on the middle portion of the meter.
By my Invention several of the parts of the valvular arrangement hitherto cast
separately are now made together in one casting.
My improved construction of valves economises space and so allows the meter to
be made smaller without diminishing its measuring capacity, or if preferred, larger
supplementary cylinders than at present can be employed without increasing the
size of the meter.
And in order that my Invention may be fully understood and readily carried into
effect I will describe the accompanying two sheets of drawings reference being bad
to the figures and letters marked thereon.
Figures 1 and 2 are transverse vertical sections taken respectively on the planes of
the lines A B and C D Fig. 3 and
.
Figure 3 is a plan with the cover removed of a fluid meter a motor embodying my
Improvements.
Figures 4 and 5 are detail views, on a larger scale, of the casting with the
supplementary cylinders and their valve ports and passages. Figure 4 also shows
the main valve block.
In the meter illustrated by the Drawings the outer metal casing is shown made in
three pieces a a¹ a² respectively which pieces are bolted together, b designates the
measuring cylinder, 6₁ the passage leading from the upper part of the meter to the
bottom of the measuring cylinder, 62 the piston, 63 the piston rod, 6 6 collars on
the piston rod, the inlet pipe and k the discharge pipe.
My present improvements consist in casting in one piece or casting c the
supplementary cylinders d d with their ingress egress and discharge ports and
passages. The three ports are lettered e e e² of which the port e communicates
by a passage with the cylinder d the port e¹ communicates by another passage
with the cylinder d¹ and the port e² communicates by a passage e³ in the block c
and a passage e in the casing a¹ with the discharge pipe k. One of the cylinders

page_text: is provided with a movable end cover c¹ by means of which the pistons ff¹
which are connected by the rod f³, may be placed in position in their respective
cylinders d d. The piston rod f2 is formed to fit over a recessed valve cover
or plate g which controls the three ports h¹ h³ ³ in the main valve block h; of
these ports the first ¹ is in communication through the passage b¹ with the
bottom of the measuring cylinder b, the second port h2 by a passage * com-
municates with the top of the measuring cylinder b, and the third or central
port h³ is in communication with the passage e leading to the discharge pipe k.
The ports e e e with their passages are controlled by the recessed sliding valve
cover which is loosely fitted in a recess in a valve mover or frame with a
projection at its upper end.
2
The operation of the improved meter thus constructed and arranged is substantially
the same as that of the meter described in my aforesaid Patent No. 2720 A.D. 1883.
When fluid under pressure is admitted to the middle part a¹ of the meter through
the inlet pipe and the piston 62 is at the bottom of the measuring cylinder b, as
shown in the drawings the fluid flows through the open port ' and down the passage b¹
into the bottom of the measuring cylinder 6 thereby causing the piston 62 to rise
and as the piston rod 63 approaches the end of its upward stroke the collar 61 thereon
catches the projection on the valve mover and moves the valve cover i upward
and so uncovers the port e¹; this movement of the valve cover i allows the fluid under .
pressure to flow through the port e¹ and its passage into the cylinder d¹ so that the
Huid forces outward the piston f¹ to the position shown on Fig. 4, thereby moving
the piston rod valve cover g and uncovering the port h². When the piston f1 is
forced outward the piston is forced inward and expels the fluid in the cylinder d
through the port
e under the recessed valve cover i down through the central port e²
passages ee and out at the discharge pipe k.
b
At this time the main piston 62 has reached the top of its stroke and the port h2
having been uncovered as described fluid under pressure flows through the open
port and passage into the top of the measuring cylinder 6 and forces down the
piston 62 thereby expelling the fluid on the under side of the piston from the
measuring cylinder 6 up the passage through the port h¹ under the recessed valve
cover g down through the central port h³ passage et and out at the discharge pipe k.
As the piston rod approaches the end of its downward stroke the collar ³ thereon
catches the projection and moves the valve cover i downward and so uncovers the
porte; this movement of the valve cover allows the fluid under pressure to flow
through the port e and its passage into the cylinder d so that the fluid forces
outward the piston thereby moving the piston rod f2 valve cover g and uncovering
the port h. When the piston fis forced outward the piston f' is forced inward, and
expels the fluid in the cylinder d' through the port e¹ under the recessed valve cover i
down through the central port e² passages e³ e, and out at the discharge pipe k. The
port h¹ having been uncovered as above described the stroke is again reversed by the
fluid under pressure admitted to the middle portion a¹ of the meter flowing through
the open port and down the passage into the bottom of the measuring cylinder 6
thereby causing the piston to again rise and expel the fluid above it from the
measuring cylinder up the passage h through the port under the recessed valve
cover g down through the central port h³ passage e¹ and out at the discharge pipe k.
As the main piston rod approaches the end of its upward stroke the collar 6 causes
the valve mover to move the valve cover i and uncover the port e¹ whereby fluid
under pressure is admitted to the cylinder d' again reversing the stroke flowing
through the port ² and passage h forcing down the piston 62 and expelling the fluid
from the measuring cylinder up the passage b¹ and so to the discharge pipe kas
previously described.
It is thus evident that the apparatus will continue to work as described discharging
alternately from above and from below the piston so long as fluid under pressure is
admitted through the inlet pipe j.
When used as a meter to measure water or other fluid, an arrangement of wheels
and Indicator with a suitable dial is fixed on the front angular or other convenient

page_text: part of the meter a¹ and connected to or actuated by the piston rod 63 or other
convenient moving part.
When the apparatus is used as a fluid motor the main piston rod 63 is brought
through the cover or top part a² of the casing or if more convenient through the
bottom of the measuring cylinder and suitably connected to the part to be driven or
operated.
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. The herein described improvements in fluid meters. or motors consisting in
casting the two supplementary valve cylinders their ports and passages in one block
or casting substantially as herein described and as illustrated by the annexed
Drawings.
2. The supplementary valve cylinders cast together in one piece with their ports
and passages in combination with the general arrangement of parts the whole forming
the improved meter or motor as described and as shown in the accompanying
Drawings.