Improvements in the Construction of Centrifugal Pumps for Lifting Acids or Acid Liquors.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Construction of Centrifugal Pumps for Lifting
Acids or Acid Liquors.
We, EMMA MARSH, Wife of William Marsh, of 46, Lily Hill Street, FRANK
MARSH, Mason, of 5, Stanley Street, and WRIGHT MARSH, Mason, of 16, Lily Hill
Street, all of Whitefield, near Manchester, in the County of Lancaster, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements upon the invention for which Letters
Patent No. 5,263 of the year 1892, (dated March 17th), were granted to the said
William Marsh.
According to our present improvements we make the centrifugal bucket of
brass or other suitable metal coated with ebonite, woodite, gutta percha or glass
or other vitreous substance or compound, or the bucket may if preferred be made
entirely of any of such substances instead of being merely coated with them.
The form of the bucket is that of a disc with an open central space for the entry
of the liquor. This disc is mounted on a central spindle by means of a boss to
which are attached the curved arms or vanes crossing the open space above
named, one edge of the said arms or vanes being attached to the side of the disc
or made in one piece therewith and extending to the circumference of the same.
Intermediate between each pair of long vanes we fix to the disc a shorter curved
vane reaching from the circumference to the edge of the central opening, so that
there are six curved vanes to the bucket, namely, three long and three short
ones.
The cover nut which fixes the bucket onto the spindle we also coat with the
same acid resisting substances or compound above mentioned; and instead of
lining the glands with lignum vitae we make them of solid brass coated on the
outside only with the same substances, and to prevent the faces of the bucket
from coming in contact with the stone casing which would wear away the coat-
ing we provide the spindle with a collar bearing against the gland on the side
opposite to the cover nut.
We make the suction pipe of two pieces of stone clamped together by brass or
iron clamps, coated with a composition known as Fox's cement.
And to protect that part of the spindle which passes through the inlet opening
we cover the same with a sleeve of india rubber.
Doted this 10th day of Ionuo 1900

page_text: Improvements in the Construction of Centrifugal Pumps for Lifting
Acids or Acid Liquors.
We, EMMA MARSH, Wife of William Marsh, of 46, Lily Hill Street, FRANK
MARSH, Mason, of 5, Stanley Street, and WRIGHT MARSH, Mason, of 16, Lily Hill
Street, all of Whitefield, near Manchester, in the County of Lancaster, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements upon the invention for which Letters
Patent No. 5,263 of the year 1892, dated March 17th, were granted to the afore-
said William Marsh.
The object of this our said invention is to construct an improved centrifugal
pump suitable for the purpose of lifting hot or cold acids or acid liquors, such as
are required by bleachers and for other purposes and capable of resisting the
deleterious effects of said acids or acid liquors.
The nature of this our invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the accompanying sheet of drawings and the following explanation thereof.
Fig. 1 is a side elevation, Fig. 2 is a plan view and Fig. 3 is a vertical section
on line A-A.
In these drawings similar letters refer to similar parts.
According to this invention our present improvements consist in making the
centrifugal bucket a in the form of a disc with an open central space b for the
entry of the liquor; this disc is mounted on a central spindle c by means of a
boss d to which curved arms or vanes e are attached crossing the open space above
named, the number varying according to the size of the bucket employed. One
edge of said arms or vanes is attached to the side of the disc or made in one
piece therewith and extends to the circumference of the disc. Intermediate
between each pair of long vanes we fix to the disc a shorter curved vane g extend-
ing from the circumference to the edge of the central opening b so that if the
required number of curved vanes employed is six, there will be three long and
three short vanes. The bucket is encased in two blocks of stone ff which
are united by copper or enamelled iron bolts and is fixed on the spindle by the
boss of the bucket being clamped between a nut and a collar a bearing
against the gland the ends of the spindle projecting on each side of the stone
and working in the glands q'. We make the suction pipe of two pieces of stone
clamped together by brass or iron clamps which are coated with a composition
known as Fox's cement; m is the inlet passage is a ball valve and p the
outlet passage.
"
"
We make the herein before described centrifugal bucket of brass or other suit-
able metal coated with ebonite, woodite, gutta percha, glass, or other vitreous
substance or compound by any of the known methods for coating metals with
any of the aforesaid or like substances, or the bucket may if preferred be made
entirely of any of such substances instead of being merely coated with them.
The glands are formed of solid brass coated on the outside with any of the here-
in before named substances, and we also coat or cover in like manner the nut a³,
and any metallic parts that are subject to the action of the acids or acid liquors
which the pump may be employed to raise.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. A centrifugal pump for lifting acids or acid liquors that is constructed with

page_text: a bucket formed of a disc in which is an open central space and provided with
alternately long and short vanes radiating from the centre, the long vanes extend-
ing from the circumference to the boss crossing the aforesaid open central space,
and the short vanes extending from the circumference to the edge of the open
central space, substantially as and for the purpose herein before described.
2. A centrifugal pump for lifting acids or acid liquors that is formed by the
combination with suitably shaped stones having a recess therein for enclosing a
centrifugal bucket, and inlet and outlet passages formed in said stones which are
united by metallic bolts and clamps coated with an acid resisting composition,
of a centrifugal bucket constructed of brass or other metal and coated with
ebonite woodite, gutta percha, glass or other vitreous substance or compound,
or formed entirely of any of said or like materials, and similarly coating or
covering all glands, nuts, and parts exposed to the action of the acids or acid
liquors for the purpose & in the manner substantially as herein before described.
Dated this 6th day of October 1899.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.