Year: 1888

page_text: Date of Application, 19th June, 1888
Complete Specification Left, 19th Mar., 1889
Complete Specification Accepted, 27th Apr., 1889
I, WILLIAM KEY, of 163, Barnsbury Road, Islington, in the County of Middlesex,
Manufacturer, do hereby declare the nature of my said invention to be as
follows:-
The object of my Invention is to manufacture an improved form and arrangement
of apparatus for measuring liquids.
In the following description the word "water" is intended to include all other
liquids, to the measurement of which my Invention may be applied.
"My Invention consists of a cistern fitted with a lever supply valve, the lever being
fitted with a float ball for opening and closing the valve. To this ball lever a hinged
latch is fitted which engages a plate attached to a weight on a second float ball lever,
and prevents the supply lever from immediately closing the valve until the rise of the
second ball lever releases it.
At the bottom of the cistern a valve is fitted for allowing a definite quantity of water
to flow out of the cistern. Above this valve I fit a float (preferably) of an annular
form. Through the centre of this float a chain descends to the outflow valve, this
chain passes upwards, to a weighted lever, which is governed by a cam, for engaging
and releasing the weighted lever. A chain from the annular float is also attached to
the weighted lever.
The operation of my Invention is as follows:- -When the supply is open the water
rises and lifts the annular float, which relaxes its chain attached to the weighted lever,
but this action does not yet open the outflow valve. The continuance of the inflow
afterwards supports the supply ball, without cutting off the supply until the
second ball lever is also raised by floating. This releases the supply ball, and permits
its lever to suddenly shut off the supply. The rise of the supply lever moves the cam
by means of a connecting pin, whereby the weighted lever is at the same time
released from the cam, when, the outflow valve is raised and the water allowed to

page_text: escape. The supply lever is retained in its highest position by the cam, until the low
level of the water lowers the annular float, shuts the outflow valve, and releases
the supply lever.
An important feature of my invention consists in promptly and fully opening and
closing the supply valve, immediately the water arrives at the low or high water level,
as distinguished from ordinary gradual opening and closing.
The floats may be of any other forms than those herein before mentioned.
Any reciprocating part of the mechanism, is connected, by suitable means, with
any ordinary counting mechanism, for the purpose of registering the quantity of
water passing through the apparatus.

page_text: I, WILLIAM KEY, of 163 Barnsbury Road, Islington, in the County of Middlesex,
Manufacturer 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 :-
The object of my invention is to manufacture an improved form and arrangement of
apparatus for measuring liquids.
In the following description the word water is intended to include all other liquids,
to the measurement of which my invention may be applied.
My invention consists of a cistern, marked in the accompanying drawing, with the
letter A, fitted with a lever supply valve B, the lever being fitted with a float ball C
for opening and closing the valve. To this ball lever a hinged latch D is fitted
which engages a plate E attached to a weight F on a second float ball lever G and
prevents the lever of the supply valve B from immediately closing the valve until the
rise of the second ball lever G releases it.
At the bottom of the cistern A a valve H is fitted for allowing a definite quantity of
water to flow out of the cistern. Above this valve H I fit a float J (preferably) of
an annular form.
Through the centre of this float J a chain K descends to the outflow valve H, this
chain K passes upwards to a weighted lever L which is governed by a cam M for
engaging and releasing the weighted lever L and for retaining the lever supply
valve B in its closed position during the outflow of a measured quantity of water, by
A chain P from the
means of the pin N on the lever of the supply valve B.
annular float J' is also attached to the weighted lever L.
The operation of my invention is as follows:-
which
When the supply is open, the water rises and lifts the annular float J,
relaxes its chain P attached to the weighted lever L but owing to the position of the
The continuance of the
cam M this action does not yet open the outflow valve.
inflow afterwards supports the supply ball C without cutting off the supply until the
second ball lever G is also raised by floating to the exact point at which the plate E
disengages itself from the hinged latch D. This releases the supply ball C and permits
its lever to suddenly shut off the lever supply valve B. The rise of the supply ball moves
the cam M by means of the connecting pin N whereby the weighted lever L is
at the same time released from the cam M, when, the outflow valve H is raised
and the water allowed to escape. The supply bail C is retained in position closing the
lever supply valve B until the low level of the water lowers the annular float J, shuts
the outflow valve H, and releases the supply ball C.
An important feature of my invention consists in promptly and fully opening
and closing the supply valve, immediately the water arrives at the low or high water
level, as distinguished from ordinary gradual opening and closing.
The floats may be of any other form than that herein before mentioned.
Any reciprocating part of the mechanism may be connected, by suitable means with
any ordinary counting mechanism for the purpose of registering the quantity of
water passing through the apparatus,

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The construction of water meters employing a high level float G and a low level
float J arranged to control the movements of a third float C in such a manner that it
may rise suddenly immediately upon the high level being reached and may fall
suddenly immediately upon the low level being reached, to close and open a supply
valve alternately substantially as described and illustrated by the accompanying
drawing.
"
2. The cam M constructed and arranged to keep the outflow valve closed during the
inflow of water and to keep the supply valve closed during the outflow of water
substantially as and for the purpose set forth.
3. The combination of parts forming the water meter substantially as described.
Dated this 19th day of March 1889.
AYRTON & THOMAS,
Agents for the Applicant.