Improved Apparatus for Pumping Air and Gas.
Year: 1892

page_text: Date of Application, 7th Mar., 1892
Complete Specification Left, 7th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improved Apparatus for Pumping Air and Gas.
We WILLIAM BENJAMIN GRIFFITHS of Riverside, Cardiff, in the County of
Glamorgan Clerk, and JAMES WOODLEY, Engineer, of Canton, Cardiff in the
County of Glamorgan do hereby declare the nature of this invention to be as
follows:-
:-
Our invention consists of a tank of any suitable construction fitted with an inlet
and outlet pipe which terminates at its upper endt in a tundish or bell mouth, and is
fitted at the bottom or in any other convenient position, with one or more valve
boxes furnished with one or more inlet and outlet valves. A cylindrical case open
at the bottom and having a dome or other suitably shaped top is fitted inside such
tank over the inlet and outlet pipe, and is connected to a crank shaft by means
whereof it is worked up and down. The bottom of this cylindrical case is mounted
in a suitable guide frame which fits round the inlet and outlet pipe and serves to
keep the case in position as it slides up and down over such pipe. A circular plate,
hereafter termed the check plate, is fixed to such inlet and outlet pipe at a con-
venient distance below the tundish. The cylindrical case is kept in a central position
over the inlet and outlet pipe by means of a guide rod which passes through a
suitable guide bar fastened to the top of the crank.
In working our invention the tank is almost filled with water in which the
cylindrical case works up and down by the operation of the crank shaft or by any
other suitable motor. On the upstroke of the cylindrical case the air or gas, is
drawn in through the inlet valve in the valve box, and on the downstroke of the
case such air or gas, escapes through the outlet valves in such valve box. The
check plate fitted round the inlet and outlet pipe, as mentioned above prevents the
water in the tank working up and down in the interior of the cylindrical case when
it is in motion while the tundish or bell mouth at the top of the inlet and outlet
pipe takes the pressure of the air off the water on the downstroke of the
cylindrical case.
.
If desired two or more cylindrical cases may be fitted inside the tank, cach
sliding up and down over an inlet and outlet pipe in the manner above described,
and when this arrangement is adopted such cases are arranged to work up and
down alternately so as to obtain a continuous air current.
The advantage of the cylindrical case or cases working in water is that the water
acts in the place of pistons and packing, and prevents friction thus avoiding the
expense of packing and lubrication.
Dated this 7th day of March 1892
ELT & Co.,
33, Southampton Buildings, Holborn, London, Agents for Applicants.
COMPLETE SPECIFICATION.
Improved Apparatus for Pumping Air and Gas.
We WILLIAM BENJAMIN GRIFFITHS, of Riverside, Cardiff, in the County of
Glamorgan, Clerk, and JAMES WOODLEY of Canton, Cardiff, in the County of
Glamorgan, Engineer, 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:―
Our invention consists of a tank of any suitable construction fitted with an inlet
and outlet pipe, which terminates at its upper end in a tundish or bell mouth, and

page_text: s fitted at the bottom or in any other convenient position with one or more valve
boxes furnished with one or more inlet and outlet valves. A cylindrical case open
at the bottom, and having a dome shaped top, is fitted inside such tank over the
inlet and outlet pipe, and is connected to a crank shaft by means whereof it is
worked up and down. The bottom of this cylindrical case is mounted in a suitable
guide frame which fits round the inlet and outlet pipe and serves to keep the case
in position as it slides up and down over such pipe. A circular plate, hereafter
termed the check plate is fixed to such inlet and outlet pipe at a convenient
distance below the tundish. The cylindrical case is kept in a central position over
the inlet and outlet pipe by means of a guide rod, which passes through a suitable
guide bar fastened to the top of the tank.
In working the apparatus the tank is almost filled with water in which the
cylindrical case works up and down by the operation of the crank shaft, or by any.
other suitable motor. On the upstroke of the cylindrical case, the air or gas is
drawn in through the inlet valve in the valve box, and on the downstroke of the
case, such air or gas, escapes through the outlet valve in such valve box. The
check plate fitted round the inlet and outlet pipe as mentioned above prevents
the water in the tank working up and down in the interior of the cylindrical case.
when the latter is in motion while the tundish or bell mouth at the top of the inlet
and outlet pipe takes the pressure of the air off the water on the downstroke of the
cylindrical case. If desired two or more cylindrical cases may be fitted inside the
tank, each sliding up and down over an inlet and outlet pipe in the manner above
described, and when this arrangement is adopted such cases are arranged to work.
up and down alternately so as to obtain a continuous air current. The advantage
of the cylindrical case or cases working in water is that the water acts in the place
of pistons and packing and prevents friction, thus avoiding the expense of packing
and lubrication.
The accompanying drawings shew a tank fitted with a single cylindrical case.
Figure 1 shews an end elevation partly in section shewing the cylindrical case at
half stroke, valve box, valves, tundish and main tank with the other features of
our invention. a is the water space, the water tank. e the working cylindrical
case. d the inlet and outlet pipe. e tundish or bell mouth for taking the air
pressure off the water inside the cylindrical case on the down stroke of such case.
guide arms to keep such case in position when working up and down the pipe d..
g the inlet valve which admits air on the up stroke of the cylindrical case.
outlet valve. i valve box shewing the inlet and outlet valves closed. j joint to
which the connecting rod is fastened. guide rod passing through a guide p
which is made fast to the main tank. Such guide rod serves to keep the cylindrical
case in a central position water line in main tank, m air space in case c, a circular
plate fastened to inlet and outlet pipe for preventing the water working up and
down in the interior of the case whilst it is in motion. o standard for carrying main
crank shaft. q connecting rod. r crank.
Figure 2 is a plan view of the bottom of the cylindrical case c shewing the guide
mwhich keeps such case in position.
arm
Figure 3 is a plan of the circular plate n which is provided with a flange to allow
of its being fastened to the inlet pipe d.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
The improved apparatus for pumping air and gas constructed arranged combined.
and fitted all substantially as hereinbefore described and shewn.
'ELT & Co.,
33, Southampton Buildings, London, W.C., Agents for Applicants.