Year: 1897

page_text: Date of Application, 5th May, 1897
Complete Specification Left, 7th Feb., 1898-Accepted, 12th Mar., 1898
I, CHARLES EDWARD BECKMAN, of 12, Adolphus Road, Finsbury Park, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention
to be as follows:-
The difficulty of taking up wear and tear when required is a frequent cause of
inconvenience when using centrifugal pumps for dredging and similar purposes,
and the object of my present invention is to so construct the centrifugal pump
that such wear and tear can be readily taken up.
I have found that great difficulty is experienced in maintaining a good joint
between the suction pipe and the internal runner or fan and that owing to sand
and grit coming in contact with the main shaft between the runner and outer
casing and getting into the stuffing-box, the shaft, is subjected to undue wear
thereby rendering the pump more or less inefficient. To obviate these and other
minor difficulties I construct the pump as follows:-The pump casing is made in
halves and bolted together. A cover plate is bolted to the one side of casing by
means of the studs. This cover is provided with a boss through which the suction
pipe passes and upon which latter is cast a fillet whereby a swivel joint is made
between the suction pipe and the cover of the casing for the purpose of enabling
the suction pipe to be placed at any required angle. The aforesaid fillet fits snugly
into a corresponding groove in the boss of the cover plate, and is held therein by
a divided plate or ring secured to a flange. In order to secure a perfect joint
between the fillet and the groove I sometimes employ a leather or other packing
ring. The suction pipe is extended from the fillet towards the centre of the pump
which extended part butts against and makes a close joint with a ring fixed on the
internal runner or fan.
On the other side of the casing is fixed another cover provided with a stuffing-
box and gland. In ordinary centrifugal dredging pumps the shaft is subjected to
great wear and tear in this stuffing-box; but to avoid this 1 fix by any suitable
means on to the shaft a sleeve which rotates in the stuffing-box and in subjected to
all the wear and tear above referred to, but can be replaced at a trifling expense.
The two aforesaid covers are provided with bolt holes similarly placed so that
the suction pipe may be placed on the right or left side of the pump as may be
desired. Likewise the rivets holding the jointing ring in place on the runner
side plate are placed similarly to those holding the driving plate on the other side
plate to enable these parts to be reversed if and when required.
The head-stock carrying the shaft and runner or fan is mounted on the bed and
provided with projections which take into slots in said bed so that the head stock
can be moved backward or forward for the purpose of adjusting the runner or fan
to the end of the suction pipe, and can be made fast by means of tee-bolt- taking

page_text: into said slots. It will now be understood that the jointing ring can always be
kept close up to the face of the extended end of the suction pipe.
Dated this 5th day of Nov 1807
Improvements in Centrifugal Pumps.
I, CHARLES EDWARD BECKMAN, of 12, Adolphus Road, Finsbury Park, in the
County of Middlesex, 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:-
The difficulty of taking up wear and tear when required is a frequent cause of
inconvenience when using centrifugal pumps for dredging and similar purposes,
and the object of my present invention is to 'so construct the centrifugal pump
that such wear and tear can be readily taken up.
In the accompanying drawings Figure 1 is a sectional elevation of a centrifugal
pump with my improvements applied thereto, and Figure 2 is a side view of the
internal runner or fan of the pump.
I have found that in centrifugal pumps of the kind referred to great difficulty
is experienced in maintaining a good joint between the suction pipe and the in-
ternal runner or fan, and that owing to sand and grit coming in contact with the
main shaft between the runner and outer casing and getting into the stuffing-box,
the shaft is subjected to undue wear thereby rendering the pump more or less
inefficient. To obviate these and other minor difficulties I construct the pump
as follows: A is the pump casing made in halves and bolted together at B. C is a
cover bolted to the casing A by means of the studs D. This cover C is provided
with a boss E through which the suction pipe F passes and upon which latter is
cast a fillet whereby a swivel joint is made between the suction pipe and the
cover C of the casing A for the purpose of enabling the suction pipe to be placed
at any required angle. The aforesaid fillet F1 fits snugly into a corresponding
groove in the boss E of the cover C, and is held therein by a divided plate or
ring G secured to the flange 2 by the bolts G. In order to secure a perfect joint
between the fillet F and the groove E¹, I sometimes employ a leather or other
packing ring. It will be observed by reference to the drawing that the suction
pipe is extended from the fillet towards the centre of the pump at F2
which extended part butts against and makes a close-joint with the ring F3 on the
internal runner or fan K*. On the other side of the casing A is fixed another
cover H provided with a stuffing-box ] and gland I¹. In ordinary
centrifugal dredging pumps the shaft is subjected to great wear and lear
in this stuffing-box; but to avoid this I fix by any suitable means
on to the shaft Ja sleeve which rotates in the stuffing-box I and is subjected to
all the wear and tear above referred to, but can be replaced at a trifling expense.
The two covers C and H are provided with bolt holes similarly placed so that the
suction pipe may be placed on the right or left side of the pump as may be desired.
Likewise the rivets holding the jointing ring F in place on the runner side
plate K are placed similarly to those holding the driving plate L (of the shaft J)
on the side plate K', to enable these parts to be reversed if and when required.
The head stock N carrying the shaft J and runner or fan K is mounted on the
bed O, and provided with projections N¹ which take into slots O' so that the head-

page_text: stock can be moved backward or forward for the purpose of adjusting the runner
or fan K to the end of the suction pipe, and can be made fast by means of
tee-bolts Ptaking into said slots. It will now be understood that the jointing
ring F3 can always be kept close up to the face of the extended end F3 of the
suction pipe F.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
:―
First. In a centrifugal dredging pump the means for taking up the wear and
tear between the end of the suction pipe F and the internal runner or fan which
consists in mounting the shaft J of the said runner or fan in a headstock N
movable in a direction parallel to said shaft, substantially as described with
reference to the drawings.
Second. In a centrifugal dredging pump the use of a movable ring F3 in con-
nection with the internal runner or fan K substantially as described with reference
to the drawings and for the purpose set forth.
Third. In a centrifugal dredging pump the employment of a replacable sleeve J¹
secured to the shaft J, substantially as described with reference to the drawings
and for the purpose set forth.
Dated this oth day or 'ebruary 1898.
C. E. BECKMAN,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.