Improvements in Valves for Gas Meters.
Year: 1891

page_text: nate of Application, 7th July, 1891-Accepted, 29th Aug., 1891
COMPLETE SPECIFICATION.
Improvements in Valves for Gas Meters.
I JOHN FOXALL of Newport in the County of Monmouth, Gas Meter Maker,
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 the valves of what are known as dry gas meters, the
object of the invention being to render the valves silent when working.
The valves used in this class of meters are ordinary D valves, and the seat
consists of a plate or casting having three openings or ports placed side by side,
and separated by a narrow strip of metal or thin partition.
These thin partitions are called bars, and it has been found that when the valves
have become rough or dry through wear, they whistle or make a disagreeable noise,
which noise is caused by the vibration of the bars forming the valve seat.
Now, according to my invention, I strengthen or stiffen these bars, so that they
will not vibrate and make the unpleasant noise above referred to, and I effect my
object by introducing between the bars and across the openings or ports, light stays
or supports.
In the accompanying drawing,
Fig. 1 is a plan view of the valve plate of a dry meter showing the position of the
valves.
Fig. 2 is a top view of the valve.
Fig. 3 is a plan view of the valve seat.
Fig. 4 is a transverse section on the line xx, Fig. 3; and
Fig. 5 is a longitudinal section on the line z z, Fig. 3, showing also the valve in
position.
A is the D-valve, and B the valve seat, which in this case consists of a cast
metal frame B, with cross bars B', forming partitions between the ports 1. 2. 3.
These bars or partitions B' are provented from vibrating under certain conditions
by the strengthening or stiffening stays or supports C which stretch across the
ports. As these strengthening pieces C are comparatively light, they do not, to
any appreciable extent, contract the size of the ports, but are sufficient to prevent
the vibration of the bars B¹ which causes the unpleasant noise above referred to,
and to produce that great desideratum, a silent valve.
These stiffening pieces C do not extend to the surface of the valve seat, so that
the valve will not touch them or work upon them; thus, the pieces C will not
cause extra friction to the valve, neither will the valve seat become dirty or
clogged by reason of these pieces, while a clear way for the gas will always be
presented.
It is quite unnecessary to describe the action of the valves and the mode of
communicating motion thereto,, and to the registering dial, as all are well known,
and my invention makes no change in either.
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 application to the seats of dry gas meter valves, of strengthening or
stiffening nieces a and for the numose set forth

page_text: 2. The construction of valve seats for dry gas meters, with strengthening or
stiffening pieces as above described.
DJLaw of Tul 1001
NEWTON & SON,
Agents for the Applicant.