Year: 1898

page_text: Date of Application, 16th June, 1898-Accepted, 6th Aug., 1898
I, HENRI BEAU, of 20, Rue de la Terrasse, Paris, in the Republic of France,
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:-
This invention relates to a new or improved pump which may be described as
a "pendulating" pump, because it is constructed according to the theories pre-
viously propounded in my prior Patent No. 15509 dated 13th July 1896, and the
compulsory rhythmic. motion of my new or improved pump may be compared with
that of a pendulum.
The new pump which
exceedingly simple in construction and mode of opera-
tion is illustrated in the accompanying drawings, Figs. 1 and 2 are sectional
elevations showing two different positions of one form of my improved pump, and
Fig. 3 is a sectional elevation showing a modification thereof. Like parts are
lettered to correspond in all three figures.
A pipe A open at both ends has its lower part plunged in a reservoir B which
latter is furnished with a suction valve C, the same pipe A opening at the top
into a discharge reservoir D. A piston P works in the tube A. If desired the
lower reservoir B may be furnished with a snifting valve.
The working of the pump is very simple.
The apparatus being filled with liquid, an air cushion is formed in the upper
part of the reservoir B. In these conditions, if I press the piston P down-
wards, I bring it into the position shown in Fig. 1, thereby increasing to a cer-
tain extent the compression of the air contained in the part b. If at this moment
I release the piston P the compressed air expands in the reservoir B, forcing the
water into the tube A and raising the piston which takes the position shown in
Fig. 2; a certain quantity of liquid being discharged from the reservoir D. But
during this rise the column of water forming a partial vacuum behind it the
suction valve C opens and admits into the lower reservoir B a quantity of liquid
equal to that discharged from the upper reservoir D.
At this moment, the column of liquid tends to resume its original position and
closes the suction valve C. This is the time for giving the second stroke of the
piston which again compresses the body of air in the part b-in fact the more
promptly the retrograde action of the column of liquid is followed up, by the next
stroke of the piston, the less will be the amount of force required. The actuat-
ing force must thus be suitably rhythmic as has been before stated. In certain
cases the body of air may be replaced by springs or by elastic walls arranged in
a suitable manner.
As in my similar and previously patented apparatus, the actuating force remains
always the same whatever be the height of the apparatus and this force or effort
is limited to what is necessary for sustaining the motion.
With suitable modifications this pump may be made either a suction and force

page_text: pump or either of such pumps. In Figure 3 I have shown a combined suction
and force pump.
In this modification, the suction valve C is above the reservoir B, and the
tube A opens into the interior of a second tube F which extends to a certain
depth into the reservoir B. Towards the lower end of the pipe A are side holes i
above and below the level of which a float valve K moves upwards and down-
wards, the floating of such valve being effected by cork discs L or in any other
suitable manner. The travel of the valve K is restricted at m by an ordinary
valve seating in the tube A, and at n by a cross-piece which arrests the valve
whilst allowing the water to pass. Finally towards the bottom of the reservoir B
is the lower end of the open tube HH' the upper end of which may be carried
to any height.
The apparatus being made ready, if I give a stroke of the piston downwards, I
force a certain quantity of water into the reservoir B,--the valve K falling to n-
if I now release the piston P, the column contained in A, under the action of the
air compressed in brises again, and at the same time the valve K rises. The
latter reaching its seating m, cuts off sharply the column, the upper part of which,
in consequence of its motion, continues its course upwards, and, producing a par-
tial vacuum behind it, sucks a certain quantity of water through the suction
valve C. An equal quantity of water is discharged at E and the column tends to
fall. This is the moment for giving a second stroke of the piston, thus advan-
tage is taken of the rhythm which is established between the rise and fall of the
column, and the force to be employed becomes less in proportion as it is oppor-
tunely made.
But at each stroke of the piston, the compression of the air contained in bis
increased, by reason of the introduction of a certain quantity of water in the
reservoir B, and as this pressure constantly equilibrates the column of water
which ascends in the tube HH', a time will come when the water will reach the
upper end H always equilibrated by the air compressed in b. From this moment,
if the working of the pump be continued, the water will be discharged at H',
whatever may be the height of the upper end of the tube HH¹.
If the column H be shut off the pump will become a suction pump only, and
in this case the piston should not be tight. As before explained the pressure of
the air contained in 6 equilibrates the column contained in H.
It follows that for great differences of height between the columns A and H, the
force to be employed for overcoming this pressure and consequently for working
the piston would be considerable. To remedy this it is only necessary to load the
piston P, in order that its weight may equilibrate pretty nearly the pressure of
the air cushion in b to the extent of the desired difference.
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. A pump for raising liquids to any height, in which the liquid column is
always equilibrated by a body of air put under pressure by the operation of a
piston the actuating force of which is always constant whatever the height to
which the water has to be raised, this force consisting simply in perpetuating
the rhythmic up and down motion of the column and being independent of the
work to be effected substantially as described.
2. A pump for raising liquids to any height consisting of a lower reservoir B
with a suction valve C therein, an upper reservoir D having a discharge pipe E,
a tube A connecting the two reservoirs and opening below the level of the liquid
in the lower reservoir B, and a piston P loosely fitting in said tube A and reci-
procated therein by a rhythmic motion substantially as and for the purpose here-
inbefore set forth and illustrated in Figs. 1 and 2 of the accompanying drawings.
3. The modified form of combined suction and force pump substantially as

page_text: described with reference to Fig. 3 of the accompanying drawings operating in the
manner and for the purposes herein before set forth.
4. The new or improved pump arranged to operate substantially in the manner
and for the purposes herein before set forth and illustrated in the accompanying
drawings.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.