IMPROVEMENTS IN CENTRIFUGAL PUMPS
Year: 1875

page_text: LETTERS PATENT to John Jameson and Anton Georg Schaeffer, of
Akenside Hill, Newcastle-upon-Tyne, Consulting Engineers, for the
Invention of "IMPROVEMENTS IN CENTRIFUGAL PUMPS," A com-
munication from abroad by Conrad Tegnander, of Gothenberg, in
the Kingdom of Sweden, Engineer.
Sealed the 16th October 1875, and dated the 13th May 1875.
PROVISIONAL SPECIFICATION left by the said John Jameson and
Anton Georg Schaeffer at the Office of the Commissioners of
Patents, with their Petition, on the 13th May 1875.
We, JOHN JAMESON and ANTON GEORG SCHAEFFER, of Akenside Hill,
Newcastle-upon-Tyne, Consulting Engineers, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN CENTRIFUGAL PUMPS," to be
as follows:-
This Invention consists in improvements in certain descriptions of
centrifugal pumps, whereby they are rendered more simple, compact,.
and efficient. For this purpose a revolving chamber or drum is employed,.

page_text: so constructed as to give adequate rotary motion to the fluid to be
pumped and having central supply and discharge orifices, and within
the revolving chamber or drum is affixed an internal stationary chamber
or drum, inside which the fluid pumped is protected from the action of the
rotating force applied to the revolving chamber. This internal chamber
communicates by an opening or openings in or near the circumference
of the same with the interior of the revolving chamber before described,
and externally through the central discharge orifice of the revolving
chamber with a central discharge pipe in the line of the axis of revolution
of the revolving chamber, to which revolving chamber. the discharge
pipe is fitted by a stuffing box and gland or other arrangement to make
it approximately water-tight.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Jameson and Anton Georg Schaeffer in the
Great Seal Patent Office on the 12th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, Jonn
JAMESON and ANTON GEORG SCHAEFFER, of Akenside Hill, Newcastle-
upon-Tyne, Consulting Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of May, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
eighth year of Her reign, did; for Herself, Her heirs and successors,
give and grant unto us, the said John Jameson and Anton Georg
Schaeffer, Her special license that we, the said John Jameson and
Anton Georg Schaeffer, our executors, administrators, and assigns, or
such others as we, the said John Jameson and Anton Georg Schaeffer,
our executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN CENTRIFUGAL PUMPS," (a communication to us from
abroad by Conrad Tegnander, of Gothenburg, in the Kingdom of
Sweden, Engineer,) upon the condition (amongst others) that we,

page_text: the said John Jameson and Anton Georg Schaeffer, our executors or
administrators, by an instrument in writing under our or their hands
and seals, or under the hand and seal of one of us or them, should par-
ticularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said John Jameson and Anton Georg
Schaeffer, do hereby declare the nature of the said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement thereof, that is to
say:―
This Invention consists in improvements in certain descriptions of
centrifugal pumps, whereby they are rendered more simple, compact,
and efficient. For this purpose a revolving chamber or drum is employed,
so constructed as to give adequate rotary motion to the fluid to be
pumped, and having central supply and discharge orifices, and within
the revolving chamber or drum is affixed an internal stationary chamber
or drum, inside which the fluid pumped is protected from the action of
the rotating force applied to the revolving chamber. This internal
chamber communicates by an opening or openings in or near the
circumference of the same with the interior of the revolving chamber
before described, and externally through the central discharge orifice of
the revolving chamber with a central discharge pipe in the line of the
axis of revolution of the revolving chamber, to which revolving chamber
the discharge pipe is fitted by a stuffing box and gland, or other arrange-
ment to make it approximately water-tight.
accompanying Drawings exhibit two arrangements of apparatus
according to the Invention.
'
In Figure 1, A, A, A, represents the revolving drum actuated by
wheel and pinion B, B, B; C, C, is one of several feathers fixed to the
revolving drum so as to more effectually obtain adequate revolution of
the water; D, D, D, is the stationary drum communicating directly
with the discharge pipe E, E, E; F, F, F, is a stuffing box; G, G, G, is
a valve intended to retain the priming of the pump, and to support
the head of water when the apparatus is at rest. By the rapid revolution
of the revolving drum the water is driven with corresponding force to

page_text: the periphery of this drum, and having no other escape passes at the
pressure produced at the circumference of the stationary drum by the
openings shown into the same, and so by the discharge pipe onwards.
In Figure 2 the corresponding parts are similarly lettered, the
feathers C, C, C, are replaced by passages C, C, C, shown in the section
through X, Y; there is no priming valve, as the curve shown in the
revolving pump chamber is intended to pass below the level of the water
to be pumped, so as then to enable the pump to prime itself, and if a
valve be required to support the head of water beyond the pump it
would in this form of pump be better placed beyond the point H.
There is sometimes no stuffing box in this form of pump, but in certain
cases it is necessary to provide for the escape of air from the stationary
drum which may be done by a small pipe through the central spindle
from J to K, or by a separate pipe and cock from K to L.
Having thus described the nature of the Invention and the manner of 1
performing the same, we would have it understood that we do not
confine ourselves to the precise forms of apparatus shewn in the
Drawings, as the form may be considerably varied, but what we claim
is, the combination of an internal stationary drum with an external
revolving drum, arranged substantially in the manner described to act 2
as a centrifugal pump.
In witness whereof, we, the said John Jameson and Anton Georg
Schaeffer, have hereunto set our hands and seals, this Eleventh
day of November, in the year of our Lord One thousand eight
hundred and seventy-five.
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