Year: 1898

page_text: I, DAVID VERNER HALLBERG, of David Bagaregatan. 26A, Stockholm, Sweden,
Manager, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improvement in water-meters and has for its object
to secure the emptying of the meter as soon as the inlet-pipe is shut off. It is
well known that there is always the risk that the meter may be burst asunder by
freezing of the water if it is not emptied when the inlet pipe is closed. Even
if the meter be provided with a separate valve or the like to be actuated by
hand, the safety is nevertheless very small, as it is known by experience that
the valve will be often left in its closed position when the inlet-pipe is shut off,
on account of inattention or carelessness.
According to this invention the water-meter is provided with an air-valve which
co-operates with the closing valve so as to open as soon as the latter is closed.
In the accompanying drawing a water-meter constructed according to this in-
vention is illustrated. Fig. 1 shows the meter in longitudinal section, Fig. 2
is an end-view of the said meter, and Fig. 3 is a plan-view of the same.
In this water-meter the driving and registering mechanism are constructed in
the ordinary way, but the meter differs from those hitherto known in respect
or the like
that the air-valve, which may be suitably formed by a valve plate
secured to the inner end of a movable bar a, is actuated by means of the said bar a
and by a cam or projection on the spindle c of the inlet-valve in such a
manner that the bar a is forced inwards and the valve opened when the inlet-
valve is closed. The valve-plate bin its closed position covers the inner mouth
of a channel communicating with the outer air, through which channel the air
streams in while the meter is emptied. At the outer end of the bar a said bar
passes through a packing a¹ but so easy that the inner pressure of the liquid is
sufficient to close the valve b, when the inlet-valve is opened. It is obvious that
the valve can also be held in its closed position by means of a spring or the like.
The eccentric cam c¹ is so placed on the valve spindle c that it does not actuate
the valve bar a, (which may be suitably provided with an end extension a² or the
like,) before the valve spindle has been screwed down in its closed position. The
spindle c moves up or down in its nut, according as the inlet-valve is to be opened
or closed.
As soon as the water is shut off the valve will thus be opened, so that
the air is allowed to enter and the water to escape from the water-meter.
It should be observed that the invention is not limited to the construction set
forth in the drawing but can be varied in several ways without departing from the
chief idea. For instance the screw-valve for shutting off the liquid could be
replaced by an ordinary cock actuating the air-valve when placed in its closed
position; the air-valve could be formed by a turning plug, and so on.
orch 1898
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agents for the Applicant.

page_text: 1, DAVID VERNER HALLBERG, of David Bagaregatan 26A, Stockholm, Sweden,
Manager, 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 tollowing statement; -
This invention relates to an improvement in water-meters and has for its object
to secure the emptying of the meter as soon as the inlet-pipe is shut off. It is
well known that there is always the risk that the meter may be burst asunder by
freezing of the water if it is not emptied when the inlet pipe is closed. Even
if, the meter be provided with a separate valve or the like to be actuated by
hand, the safety is nevertheless very small, as it is known by experience that
the valve will be often left in its closed position when the inlet-pipe is shut off,
on account of inattention or carelessness.
According to this invention the water-meter is provided with an air-valve which
co-operates with the closing valve so as to open as soon as the latter is closed.
The invention consists, briefly, in providing a small valve in the upper part
of the meter, said valve being so connected with the inlet-valve of the meter, that
when the latter valve is closed the former will be caused to open a small com-
munication between the inside of the meter and the outside, so that the air will
have a free entrance into the meter and the water will be able to escape, the
bottom of the meter being suitable for this purpose.
One way of carrying out this invention is shown in the drawing left with the
Provisional Specification, in which Figure 1 shows a longitudinal section of a
water-meter constructed according to this invention, Fig. 2 shows a part section
of the same, and Fig. 3 a plan view.
In this water-meter the driving and registering mechanism are constructed in
the ordinary way, but the meter differs from those hitherto known in respect that
an air-valve, which may be suitably formed by a valve plate bor the like
secured to the inner end of a movable bar a, is actuated by means of the said bar a
and by a cam or projection c¹ on the spindle c of the inlet-valve, in such a
manner that the bar a is forced inwards and the valve 6 opened when the inlet- 3
valve is closed.. The valve-plate 6 in its closed position covers the inner mouth
of a channel communicating with the outer air, through which channel the air
may stream into the meter so that the same is emptied when the inlet-valve is
closed. Around the outer end of the bar a there is applied a packing a¹ but so
easy that the inner pressure of the liquid is sufficient to close the valve b, when 3
the inlet-valve is opened. It is obvious that the valve can also be held in its
closed position by means of a spring, or the like. The eccentric cam c¹ is so
placed on the valve spindle c that it does not actuate the valve bar a, (which may
be, suitably provided with an end extension a² or the like,) before the valve
spindle has been screwed down in its closed position. The spindle c moves up or
down in its nut, according as the inlet-valve is to be opened or closed.
as the water is shut off the valve will thus be opened, so that the air is
allowed to enter and the water to escape from the water-meter.
As soon
It should be observed that the invention is not limited to the construction set
forth in the drawing but can be varied in several ways without departing from the 4
chief idea. For instance the screw-valve for shutting off the liquid could be
replaced by an ordinary cock actuating the air-valve when in closed position.
Instead of the described air-valve a turning plug could be used.

page_text: Having now particularly described and ascertained the nature of this said
invention, and in what manner the same is to be performed I declare that what I
claim is:-
1. The combination with a water-meter, of the air-valve so connected with the
inlet-valve of the meter that the said air-valve is opened when and only when
the said inlet-valve is closed, substantially as and for the purpose set forth.
2. The combination with a water-meter, of a rod running through the wall of
the meter, a small valve fastened to the end of said rod and adapted to normally
close a small air-passage in said wall, a projecting cam on the ordinary inlet valve
of the meter adapted to actuate the said bar so as to open the said air-valve when
the said inlet-valve is closed, substantially as set forth.
Dated this 30th day of November 1898.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agents for the Applicant.