Improvements in or connected with Gas and like Meters.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Gas and like Meters.
I. EDGAR RHODES, of Hanover Works, Hanover Lane, Leeds, in the County
of York, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention refers to gas and like meters, and my object is to so construct
the same that the reciprocating motion of the pistons or bellows is more efficiently
converted into a rotary motion for actuating the valves and index mechanism,
than heretofore.
According to my invention I employ a triangular frame, the apex of which
is carried on an adjustable crank pin situated on the valve shaft of the meter.
The lower angles of the triangular frame are connected by means of connecting
links with the ends of the piston rods or bellows, and the movement of the
triangular frame is controlled by radial links which are fulcrumed on the frame-
work of the meter and to the base of the triangular frame. The weight of the
moving parts is balanced by. means of a weighted lever, one end of which is
connected to the triangular frame by means of a connecting rod, and the other
end carries a weight which may be adjusted in position to suit the requirements
of the meter.
When the meter is at work, the pistons or bellows are set so that one is at or
about a half stroke in advance of the other, and the dead points of the crank pin
are overcome by the rocking of the triangular frame at these points, the said
rocking motion being caused owing to one of the piston rods being at the end of
its stroke and being thus used as a fulcrum for the other piston rod. When the
crank pin is at a suitable angle with both piston rods moving together, the
triangular frame is moved bodily up or down as though it were a
connecting rod for the two piston rods.
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common
Improvements in or connected with Gas and like Meters.
I, EDGAR RHODES, of Hanover Works, Hanover Lane, Leeds, in the County
York, Engineer, do hereby declare the nature of this invention and in what
[Price 8d.1

page_text: manner the same is to be performed, to be particularly dscribed and ascertained
in and by the following statement:-
-
My invention refers to gas and like meters, and my object is to so construct
the same that the reciprocating motion of the pistons or bellows is more efficiently
converted into a rotary motion for actuating the valve crank shaft, than heretofore.
In order that my invention may be clearly understood, I will proceed to
describe the same with reference to the accompanying drawing in which the
letters refer to the various parts of mechanism.
:
Figure 1 is a front elevation, with the case of the meter cut away so as to
shew the parts more clearly, of mechanism constructed according to my inven-
tion, and Figures 2 and 3 are diagram views shewing the movements of the
mechanism.
According to my invention, I employ a triangular frame A, the apex B of which
is carried on an adjustable crank pin C situated in the crank on the valve
shaft D, which latter passes through a stuffing box into the valve box V of the
meter. The lower angles E and F of the triangular frame are connected by
means of connecting links G and H with the piston rods J and K of the
measuring chambers J and K, and the movement of the triangular frame A is
controlled by radial links L which are fulcrumed on a bracket Msituated on the
framework of the meter, and to the base of the triangular frame. The weight
of the moving parts is balanced by means of a weighted lever N, one end of
which is connected to the triangular frame A by means of a connecting link 1,
and the other end carries a weight R which may be adjusted in position to suit
the requirements of the meter..
When the meter is at work, the pistons are set so that one is at or about
half a stroke in advance of the other, and the dead points of the crank pin C
are overcome by the rocking of the triangular frame A at these points, the said
rocking motion being caused by one of the piston rods being at the end of its
stroke and thus being used as a fulcrum for the other piston rod. When the
crank pin C is at a suitable angle with both the piston rods J and K moving
together, the triangular frame A is moved bodily up or down as though it
were a common connecting rod for the two piston rods.
By referring to the diagram views at Figures 2 and 3, the path of the tri-
angular frame A. can be distinctly seen. The dotted triangle marked 1 indicates
the triangular frame A when in its lower horizontal position. In this position
the angle is slowly lowered, by the piston rod K completing its downward
stroke, and at the same time the angle E is raised more quickly by the con-
tinued rise of the piston rod J bringing the triangle to the position 2 and
overcoming the dead point of the pin C. The two rods J and K now rise
together and cause the triangle to act as a common connecting rod into the
position shewn at 3. until the point E having reached its highest point and
beginning to descend the triangle is rocked into the position shewn at 4.
completion of the rise of the piston rod K and the continued depression of the
rod J brings the triangle into the position shewn at 5, and the simultaneous
downward movement of the rods J and K lower the triangle to position 6. The 4
position is again arrived at, by the commencement of the rise of the piston
rod and the continued lowering of the piston rod K.
The
By following the movements of the triangle as above described, the method
of overcoming the dead points will be readily understood; and by careful
adjustment of the different parts, smoothness in working and accurate measure- 5
ment are obtained..
Although I have described my invention as employing a triangular frame,
it is obvious that any other frame could be employed so long as the three
triangular points B, E, and F were included.
The motion above described may be applied to any suitable type of meter; 5
and the triangle can be used in a horizontal or other position, according to the
construction of the meter to which it is to be applied,

page_text: 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. In gas and like meters, the frame A having its apex coupled to a crank
or crank pin and its lower angles connected to the piston rods or bellows,
substantially as and for the purposes set forth.
2. The triangle A connected to the crank pin C and having its lower angles
connected through suitable links to the pistons or bellows of a gas or like meter,
in combination with controlling links L and a balancing lever N having an
adjustable weight on its outer end, substantially as and for the purposes set
forth.
Dated this 26th day of V 189a
BREWER & SON,
London and Leeds,
Agents for the Applicant.