Improvements in Centrifugal Pumps.
Year: 1897

page_text: · Date of Application, 5th July, 1897
Complete Specification Left 24th Sept 1897-Accented 30th Oct.
1897
Improvements in Centrifugal Pumps.
I, FREDERICK ARTHUR ROBINSON, of 54 Old Broad Street in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to centrifugal pumps and has for its object the provision
of means whereby the suction and delivery branches of an ordinary centrifugal
pump casing, can be adjusted to any angle to one another, and to the base or
foundation frame upon which the whole is mounted.
It is found in practice that when the relative angular position of the suction and
delivery branches to one another, or of the delivery branch and the base frame is
definitely fixed, great difficulty is experienced in adapting a particular pump or
pumps of any given stock pattern to a variety of circumstances or conditions.
I am aware that a swivelling suction branch has been used, but this does not in any
large way increase the adaptability of the pump, and although I use this as a part
of my invention I do not in any way claim this device, per se, as a feature
of my invention.
To carry my invention into effect I take any ordinary pump casing having a
swivelling suction such as that described in the Specification of Letters Patent
granted to Hett under No. 8119 and date 4th of June 1888, and I arrange about
the pump casing one or more circular ribs, flanges or other equivalent supporting
devices.
I form the base frame separate from the pump casing, and provide it with a
circular seating adapted to receive and support the said circular rib or ribs,
flange or flanges, or other equivalent supporting device or devices, of the pump
casing.
I provide means for clamping or fixing the said pump casing at any desired
position upon the said base frame, in such a way that the angle of the delivery
branch can be adjusted or altered to any desired angle with the base frame, to
suit various conditions as and when desired.
To do this, I may use for example a clamping ring or rings. or the segment
or segments of a ring and a tightening device or devices, such as bolts or screws
adapted to frictionally hold the pump casing upon the base frame. Or, I may
arrange a slot or slots in either the circular part of the casing or of the base frame,
or in both, and arrange fastening devices therethrough, so that the pump casing
can be moved around on its base frame or seating to any desired angle.
It will be obvious that this adjustment of the pump casing with delivery orifice
upon the base frame, together with a swivelling suction branch forms a device
having extreme simplicity and wide range of adjustability of the suction and
delivery branches in relation to one another, and to the base frame, to suit various
conditions from one stock pattern of centrifugal pump.
FELL & JAMES,
1 Queen Victoria Street, London, E.C., Agents for the Applicant.

page_text: I, FREDERICK ARTHUR ROBINSON of 54 Old Broad Street, in the City of London,
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 centrifugal pumps and has for its object the provision
of means whereby the suction and delivery branches of an ordinary centrifugal
pump casing, can be adjusted to any angle to one another and to the base or
foundation frame upon which the whole is mounted.
It is found in practice that when the relative angular position of the suction and
delivery branches to one another, or of the delivery branch and the base frame is
definitely fixed, great difficulty is experienced. in adapting a particular pump or
pumps of any given stock pattern to a variety of circumstances or conditions.
I am aware that a swivelling suction branch has been used but this does not in any
large way increase the adaptability of the pump and although I use this as a part
of my invention I do not desire to claim in any way this device per se as a feature
of my invention.
My invention consists in arranging upon the pump casing a circular supporting
device which is adapted to adjustably engage with or be slidingly held upon
a corresponding circular seat or support on the base or foundation frame, so that
the pump casing with delivery orifice can be adjusted through a very large are,
and also in combination therewith of a swivelling suction.
In order that my invention may be the better understood I will now proceed to
describe my invention in reference to the accompanying drawings hereunto annexed
reference being had to the letters and figures marked thereon. Like letters refer
to like parts in the various figures.
Fig. 1 is a front elevation of a pump made according to my invention.
Fig. 2. is a side elevation of the same, showing a variety of positions of delivery
branch in dotted lines.
Fig. 3 is a part sectional view showing a modified arrangement, and
Fig. 4 is a part side elevation of the same.
To carry my invention into effect, I take any ordinary pump casing A having
a swivelling suction B'such as that for example described in the. Specification of
the Letters Patent granted to Hett under No. 8119 and date the 4th of June 1888
but now void, and I arrange about the pump casing A one or more circular ribs,
flanges or other equivalent supporting devices, such as the flanged rib C'in Figs. 1
and 2 or plain slotted rib C in Figs. 3 and 4 but I do not confine myself'to these
two methods.
I form the base frame D'separate from the pump casing A' and provide it with
a circular seating E'adapted' to receive and support' the circular flanges or rib C
or other equivalent supporting device of the pump casing.
I provide means for clamping or fixing the pump casing A at any desired position
upon the base frame in such a way that the angle of the delivery branch can be
adjusted or altered' to any desired angle with the base frame within reasonable
limits to suit various conditions as and when desired.
To do this I arrange a slot or slots: G in either the base frame D'as shown in
Figs. 1 and 2 or in the circular rib C of the casing A as shown in Figs. 3' and' 4.
Through these slots fastening devices such as bolts or screws F are passed to fasten
the casing A to the base frame D and to adjust it thereon to any desired angle.
In Figs. 1 and 2 the s screws F are shown tapped into the flange of the rib C,

page_text: the holes being so spaced relative to the slot that two screws on each side at least
can be used in any given angular position or if preferred the holes can be omitted
in the flange of the rib C, the casing being held by the pressure of the screws
only and in this case any angle for swivelling the pump case can be obtained
but I prefer the use of the tapped holes where permissible.
In Figs. 3 and 4 the same conditions obtain relatively a clamping ring H being
furnished to further support the slotted rib C.
If desired the slots may be omitted in which case when the angle of the delivery
branch has been fixed the necessary holes for the bolts can be drilled in their
desired positions.
It will be obvious that this adjustment of the pump casing with the delivery
branch upon the base frame together with a swivelling suction branch forms a
device having extreme simplicity and wide range of adjustability of the suction
and delivery branches in relation to one another and to the base frame to suit
various conditions from one stock pattern of centrifugal pump.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim
is:-
1st. In a centrifugal pump the combination of a casing carrying the delivery
branch having a circular support, with a base frame adapted to adjustably and
fixedly hold the said circular support of the pump casing and a suction branch
adapted to swivel on the pump casing substantially as and for the purposes described.
2nd. The construction and arrangement of a centrifugal pump casing, branches,
and supports substantially as described and illustrated in the accompanying
drawings.
Dal
04L 1
£ Cantambon 1907
FELL & JAMES,
1 Queen Victoria Street, London, E.C., Agents for the Applicant.