‘July 18, 1933-
J. w. w. DRYSDALE El‘ AL
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
Filed July 30, 1931
7"Sheets—Sheet 1
F7031.
,0
Invehinm
JohnW W Drysdnle ‘99> John Young
‘ByZuiZMWCIi/yim
Aitorney
July 18, 1933.
J. w. w. DRYSDALE ET AL
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
Filed July 30, 1951
7 Sheets-Sheet 2
Invérdmrs
J'ohnWWDrySdoleqV JOM Young
38 MLZAMWCLJFW
Ail-arms;
July 18, 1933.
J. w. w. DRYSDALE El‘ AL
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
Filed July 30, 1931
7 Sheets-Sheet 3
Inventor:
J'oMWWDrysdala q‘dJohn Young
3!! LrlQLa/m 0131mm
Aubr'rwy
July 18, 1933-
J. w. w. DRYSDALE ET AL
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
7 Sheets-Sheet 4
‘
k
£70.64.
_
/
/
E
E
I
f
l
l
f
1
1: ‘
l
1 xxx
l
1
7”
1 0’
\
F/
1mm
JohnWWDr'ysdaleqw John Young
Aiturnmj
July 13, 1933-
J. w. w. DRYSDALE m- m.
1,919,097
ELECTRICALLY DRIVEN ROTARY PUHP
Filed July 50 , 1931
7 Sheets-Sheet 5
I‘rwémi'ory
JolznWW .nrysdoleq?yjohn Ybury
3y
C. M11;
July 1'8, 1933-
J. w. w. DRYSDALE ET AL
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
Filed July 30, 1931
7 Sheets-Sheet 6
Dweni‘ors
JohnWW Drysdale Q‘d JohnYoung
Attorney
Ju1y18,19s3.
J. w. w. DRY'SDALE Em.
1,919,097
ELECTRICALLY DRIVEN ROTARY PUMP
Filed July 30, 1931
1670: (9.
7 Sheets-Sheet 7
Ha .- 9. MM
JohnWWDrysdale Qwohh )"om?
1,919,097
Patented July is, 1933
"UNITED-‘STATES PATENT OFFICE
‘
‘ JOHN ‘wnrrnrrnan' ,wIL'soN naYsnALE AND JOHN Yomve, or YOKER, GLASGOW,
‘SCOTLAND, ASSIGNOItS "1'0 DRYSD‘ALEYAND COMPANY, LIMITED, or YOKEB, GLAS
GQW, soo'rLAnn
'
nLEc'rnrciiLLY-‘pmvEN
ROTARY rum?
‘ - Application aiea July‘ so, ieanseriai No. 554,118; and in Great Britain my 27, 1931.
i This invention relates to pump units of the . tage as allowing of a greater submergence for
' submersible air bell type as covered by our a given depth of hell, or permitting of a less
According
of bell for
to the
a given
present
submergence.
invention the bell
Patent;No.{138,753. Such pump units com-. depth
prise a rotarypump with vertical axis of
made with increased diametcror increased
:'..r0tation,~an electric motor arranged above is
the pump and driving it, and a casing or bell lateral dimensions at the lower end, with the
5.3
whichenvelopes the motor. This casing or consequence that the requisite volume of con
‘bell is openqat the“ bottom but is otherwise tained air is obtained with a reduced height
of hell. According to the present invention
completely closed. When the pump is sub
the bell is made to conform as far
merged, the airin-the bell is compressed. The moreover
as
possible
to the shape of the enclosed parts
water rises. in the .bellbut not to the same
heightza's the water level outside the bell’ especially at the top, thus reducing the vol
ume at the upper part of the bell.
‘ - ‘ due to the air pressure within the bell. ‘The
The invention will be made clear by ex;
bell iscarried down su?iciently far below the amplesof
construction and will be set forth
motor to ens'urethat, when the pumpis sub
7
mergedto the maximum depth for which it is de?nitely in the claim.
Of
the
accompanying
drawings
Figsl to 7
designed‘ or intended, the water level within ,
illustrate
the
carrying
of
the
invention
into
the bellwill be‘below the ‘bottom of the motor effect with various forms of pump. Figs.
8
or such parts of the ‘motor‘as are liable to be
and
9
are
diagrammatic:
they
have
relation
‘damaged by submergence.
.
‘ ,
to air pressures and volumes.‘
With pumps of this type as heretofore con
(if:
70
.
Figs. 1, 2, and 3 illustrate a construction of
structed therehas notbeen, as far as we are
according to the invention and formed
aware, circulation, or adequate circulation, of pump
with an enlarged lower end of bell. The ar
' air within the bell when the unit is submerged
rows illustrate the air circulation. Fig. 1
ieven when only in a lip-sealed condition. (By shows
circulation when the pump is run—
a lip-sealed condition is meant that the wa ning inthe
open air, that is, nonsubmerged. Fig.
ter level is just above the lower edge of the 2 illustrates
the circulation when the unit is
bell,‘thus isolating the interior of the bell.) running lipsealed.
Fig. 3 illustratesthe same
The construction according to the present
C.
‘ winvention provides for adequate circulation when the unit is running under maximum
I of air within the bell not only when the unit submersion.
‘a is the bell. It is formed with an enlarged
‘is unsubmerged but also when it is submerged lower
6. This lower part may be cir
to any extent from the lip-sealed condition, cular, portion
square, rectangular, elliptical, or other
. .to the maximum.
85
shaped as may be found convenient.
:6 ;Further, with pumps of the‘ type in ques wise
0
is
the
electric
motor.
The
bell
?ts
closely
tion as heretofore constructed, as far as we
round the motor. It will be noticed that the
are. aware, the bell has been of cylindrical bell
is formed at the ‘top with a shoulder e and
shape, that is, of uniform diameter. WVith head-piece
object being to reduce the
submergence the pressure rises in the bell as air volume d,at the
the top of the hell. [2 is the
mthe air within it is compressed, the pressure pump and s is a stool bolted to the pump and
varying inversely as the volume as is well
supporting the electric motor. f is the fan.
is on the electric motor spindle.
By reducing the dimensions of the bell. in It It
will be seen that in the non-submerged
the upper portion-—which represents the ul
' M_ timate'container of the air-or increasing‘ the position the circulation involves the complete a‘;
dimensions in the lower part and so increas discharge of the air, viz. at g. To obtain this
discharge the stool is provided with a large
ing the amount oflimprisoned air, it results opening
t and a de?ector plate 7". Fresh cold
known.
‘
>
O
.
> that, when the bell is submerged to the maxi
mum, at greater air pressure is obtained for a air is admitted at 71, between the stool and the 100
‘
' 60$ given submergence. ~ This is of great advan bell.