Improvements in Hydro-pneumatic Machines for Forcing Beer or other Liquids.
Year: 1889

page_text: Date of Application, 1st Feb., 1889
Complete Specification Left, 1st Nov., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Hydro-pneumatic Machines for Forcing Beer or
other Liquids.
I, DAVID DENHOLM, of 65 West Regent Street, Glasgow in the County of
Lanark Scotland, Commercial Agent do hereby declare the nature of this invention
to be as follows :-
This Invention relates to improvements in Machines for pumping or compressing
air or other fluid to be used for forcing or raising Beer or other liquids.
The class of Machines to which the improvements are applicable comprises a closed
vessel into and out of which water or air are alternately allowed to flow, the water
forcing the air before it until shut off.
The essential feature of the Invention is to provide means whereby the operating of
the water inlet and outlet valves inay be simply and efficiently accomplished.
I accomplish this by means of certain arrangements & combinations of a
tumbling weight, or a canting vessel or reversing inclined plane loaded by a movable
ball, balls, gun-shot, mercury or other equivalents, so that when canted, it shall
supplement the action of the float in operating the said valves.
Otherwise the Machine may be constructed and organised similarly to other existing
analogous machines.
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DAVID F. MASON,
Glasgow, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Hydro-pneumatic Machines for Forcing Beer or
other Liquids.
I, DAVID DENHOLM formerly of 65 West Regent Street, Glasgow, in the County
of Lanark, Scotland, but now of 465 Saint Georges Road, Glasgow aforesaid,
Commercial Agent, 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 :—
My said Invention relates to improvements in machines for pumping or com- .
pressing air or other fluid to be used for forcing or raising Beer or other liquids.
On the appended sheet of Drawings Figure 1 is a sectional elevation of a machine
constructed according to my said Invention; Fig. 2 is a plan thereof with upper part
removed.
The class of Machines to which my Improvements are applicable comprises a closed
vessel or tank 1 into which water is allowed to flow under pressure by inlet pipe 2
and escape by outlet valve 3; the air being forced through an outlet pipe 4 provided
with a non-return valve (not shown) and entering by an inlet non-return valve at 5,
all which aforesaid parts may be of ordinary construction and have an effect similar
to equivalent parts of analogous machines. An ordinary ball float lever 7 is pivoted
to bottom of tank at 6 and works between two anti-friction rollers or pins 8, 28 on
ends of shear or bar 9 fixed on side of a canting vessel rocking on fixed standard 18
and consisting of part of a pipe closed at ends and containing about } full heavy balls
or gun-shot but preferably mercury, which shall readily move to either end when
tube is canted. To the bottom and top of said tube respectively at opposite ends are
attached links or slotted levers 11, 12, so as to allow a certain play on the stems or
handles which they actuate of the water outlet valve 3 and inlet valve 13. In lieu of

page_text: tube 10 a canting bar occupying same position may be used, but in this case with a
rod 23 fixed perpendicular thereto with a weight 22 as shown in dotted lines on
Fig. 1.
.
The water in its course is made to pass through a second inlet valve 14 which
remains normally open but, which is shut when pressure of air exceeds the pre-
determined point by means of the rod 17 attached to its handle being pulled up by a
flexible leather diaphragm 20 to which rod 17 is attached; the top of said rod being
loaded and kept down to desired pressure by lever and weight 16. On rod 17 is
fixed a cross piece 15 on which rests a float 19 which, should the water (through non-
action of other parts of machine) rise above level of float and be apt to overflow into
air pipo, said float is meant to rise and raise rod 17 and thus shut off the water.
On top of machine is a small valve 30 which normally keeps closed, but is made to
be opened by the float 7 coming against it when at its highest point, as it is found
that by letting of some air in some cases just before the reversing of valves the said
reversing action is facilitated.
The Machine operates as follows. The water enters by outer pipe 2 flows through
normally open valve 14 into pipe 21 through inlet valve 13 which is shown as open,
into tank which it fills forcing air before it through pipe 4 to top of Beer. When
the tank is nearly full of water the float and lever 7 is raised thereby and the lever 7
comos against roller 28 and cants over the tube 10 or weight 22 thereby shutting the
inlet valve 13 and opening the outlet valve 3 thus allowing the water to flow from
tank air meanwhile entering the same by the air inlet valve 5. As the water
subsides the float and lever 7 lower until when tank is nearly empty, the lover 7
comes against roller 8 and cants the tube 10 or weight 22 back again into position
shown thereby shutting outlet valve 3 and opening inlet valve 13 when the action is
as before.
;
•
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.
1st. An air compressing machine consisting of a tank 1 having water and air inlet and
outlet valves 13, 5, 3, & 30, in combination with a loaded canting vessel 10 provided
with shear 9 having stops 8, 28.between which the float lever 7 works and connected
to valves 3 & 13 all'arranged as herein before described and shown.
2nd. In an air compressing machine the combination of a loaded canting lever 23
fixed perpendicularly to a bar 10 provided with shear 9, having stop 8, 28 and
connected by links 11, 12, to water inlet and outlet valves all arranged particularly as
set forth and indicated on Fig. 1.
3rd. The combination and arrangement of a Diaphragm 20, float 19, rod 17 and
valve 14 as and for the purposes set forth and shown.
Dated this 31st October 1889