Improvements in Air Pumps.
Year: 1892

page_text: Date of Application. 2nd Aug., 1892
Complete Specification Left, 20th Apr., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Air Pumps.
I, WILHELM REININGHAUS of Drieberhausen near Gummersbach Rhenish
Prussia Germany, Distiller do hereby declare the nature of this invention to be as
follows:
My invention has for its object such improvements in airpumps by means of
which
1.) The cylinder can not run hot, but is always cooled by the use of a suitable
fluid which needs no renewing:
2.) The piston is always lubricated and is kept tight, as well as also the stuffing
boxes by hydraulic lock;
3.) The air can not be soiled by grease getting into it;
4.) The highest compression of the air is obtainable without warming the air
and with the least amount of power.
I use for this purpose the pump shown on the accompanying drawing in which
Fig. 1 is a side view partly in section ;
Fig. 2 is a plan.
Upon a frame B is mounted the cylinder A; by means of a wheel or pulley Con
the crankshaft D and the connecting rod E and piston rod F, the piston G is
moved to and fro in the cylinder. At both ends of the latter I arrange the
chambers H and H joined to the cylinder by means of bents I, I'; at the top of
the chambers H, H pipes Z and Z' containing the valve boxes K and K and
L and L' are fitted.
To the valve boxes K and K' is connected the suction pipe M, and the pressure
valve boxes L and L' lead to the air vessel U; N is the delivery pipe;
O a pressure gange and P a safety valve; R is a pipe for filling the space in front
of and behind the piston in the cylinder and the chambers H and H¹ with water
or other fluid; S are blow off cocks and T is a gauge glass; V is a baffle plate.
Now when working this pump the spaces on both sides are filled with water or
other fluid to equal heights on both sides when the piston stands in the middle of
the cylinder and so much, that there is just sufficient free space above as corre-
sponds to the volume of the half piston stroke in the cylinder. The shape of the
chambers H and H is such that the motion of the water moved to and fro by the
motion of the piston is uniform or in other words, that notwithstanding the linear
speed of the piston changes every moment of its stroke the rise and fall of the
water in the chambers is equal throughout. The water in H or H' thus forms the
elastic prolongation of the piston and it forms a vacuum alternately in each
chamber; but it also ensures absolute tightness of the piston in the cylinder and
of the stuffing box; it also prevents heating of the cylinder and of the piston and
helps to keep the air cool and prevents grease to get mixed with the air.
Dated this 30th day of July 1892.
WILHELM REININGHAUS,
Per Karl J. Mayer,
Agent.

page_text: JATION.
Improvements in Air Pumps.
1, WILHELM REININGHAUS of Drieberhausen near Gummersbach Rhenish
Prussia, Germany Distiller do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention has for its object such improvements in airpumps by means of
which
1.) The cylinder can not run hot, but is always cooled by the use of a suitable
fluid which needs no renewing;
2.) The piston is always lubricated and is kept tight, as well as also the stuffing
boxes by hydraulic lock;
3.) The air can not be soiled by grease getting into it;
4.) The highest compression of the air is obtainable without warming the air
and with the least amount of power.
I use for this purpose the pump shown on the accompanying drawing in which:
Fig. 1 is a side view partly in section ;
Fig. 2 is a plan ;
Fig. 3 is a cross section through the valve box and chambers below.
Upon a frame B is mounted the cylinder A; by means of a wheel or pulley C on
ue crankshaft D and the connecting rod E and piston rod F, the piston Gis
moved to and fro in the cylinder. At both ends of the latter I arrange the
chambers H and H' of pair shape and oval section and which are joined to the
cylinder by means of bents I, II which are circular at the cylinder side and oval
at the upper end.
At the top of the chambers H, H¹ castings Z and Z are mounted forming the
valve boxes K and K¹ and containing the suction valves L and the pressure
valves L'.
To the suction valve boxes K and K is connected the suction pipe M and the
chambers of the pressure valves L' lead to the air vessel U by branch pipes T;
N is the delivery pipe; O a pressure gauge and P a safety valve; R is a pipe
for filling the space in front of and behind the piston in the cylinder and the
chambers H and H' with water or other fluid; S are blow off cocks and X is a
gauge glass; V is a baffle plate having for its object to prevent water entering
into the valve chamber from the chambers H or H during the forcing period of
the stroke.
Now when working this pump, the spaces on both sides are filled with water or
other fluid to equal heights on both sides when the piston stands in the middle of
the cylinder and so much that there is just sufficient free space above, as corre-
sponds to the volume of the half piston stroke in the cylinder. The shape of the
chambers H and H' is such that the motion of the water moved to and fro by the
motion of the piston is uniform or in other words, that, notwithstanding the linear
speed of the piston changes every moment of its stroke, the rise and fall of the
water in the chambers is equal throughout.
The water in H or H' thus forms the elastic prolongation of the piston and it
forms a vacuum alternately in each chamber; but it also ensures absolute tightness
of the piston in the cylinder and of the stuffing box; it also prevents heating of
the cylinder and of the piston and helps to keep the air cool and prevents grease
to get mixed with the air.
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:
A pump for air and gas which is distinguished by having both ends of the

page_text: cylinder open and connected to chambers H cr H', which are filled with water or
other fluid up to a certain level, and being so shaped, that the rise and fall of this
fluid in the chambers is equal notwithstanding the varying linear speed of the
piston; baffle plates V being arranged, to prevent the entrance of fluid into the
valve boxes K or K' during the forcing period of the piston stroke, the whole as
shown and described and for the purpose set forth.
WILHELM REININGHAUS,
Per Karl J. Mayer,
Agent.