AN IMPROVED ROTARY PUMP
Year: 1881

page_text: LETTERS PATENT to Lorentz Albert Groth, K.G.V., Civil Engineer and
Proprietor of the Scandinavian Patent Office, under the Firm of L. A. Groth
& Co., 97, Finsbury Pavement, London, E.C., for an Invention of "AN
IMPROVED ROTARY PUMP." A communication from abroad by Herman
Himmelman, of Helsingborg, in the Kingdom of Sweden.
PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at
the Office of the Commissioners of Patents on the 14th October 1881.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the Scan-
dinavian Patont Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, E.C. "AN IMPROVED ROTARY PUMP." communication
from abroad by Herman Himmelman, of Helsingborg, in the Kingdom of
Sweden.
The object of this Invention is the construction of a simple and practical apparatus
for raising water or other liquids.
The improved pump consists of a main pipe connected to or formed with two
side or branch pipes projecting more or less at right angles from the said main pipe,
which is connected to a suction pipe or vessel in such manner that the main pipe
and its branch pipes are free to rotate independantly of the suction pipe or vessel,
which remains stationary and extends down into the liquid to be raised. The
suction pipe may be made straight or bent, and may be made of metal, indiarubber,
or other suitable material, according to circumstances.
At the ends of the branch pipes are placed hinged flaps or valves, which may be
made to close the ends or nozzles of the said pipes by pressing down a collar or
ring surrounding the main pipe, and connected by bars or links with arms on the
said flaps or valves. When the said collar or ring is not pressed down it is pushed
up by a spiral spring, whereby the flaps or valves are reopened. These arrange-
ments may however be modified in various ways to suit circumstances. The
Din C71

page_text: suction pipe is provided at its lower open end with a valve, which may be closed or
opened from above by rods or bars arranged for that purpose.
At the upper end of the main pipe is an opening provided with a valve, and
suitable arrangements may also be applied at the same end for suspending the pump
if required.
The main and branch pipes may be set in rotary motion by means of tooth
gearing or other suitable driving apparatus. When the apparatus is to be used the
valves on the ends of the branch pipes and at the bottom of the suction pipe are to
be closed, and the pump filled with liquid through the valve in the top of the
main pipe, which valve should then be closed. The pump is then placed in the
liquid to be raised, and the main and branch pipes caused to rotate; the valves on
the ends of the branch pipes and at the bottom of the suction pipe are then
opened, and the centrifugal force acts to raise the liquid and to force it out through
the nozzles of the branch pipes or through holes made for that purpose.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Lorentz Albert Groth in the Great Seal Patent Office on the
14th April 1882.
LORENTZ ALBERT GROTH, K.G.V.., Civil Engineer and Proprietor of the Scan-
dinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, E.C. "AN IMPROVED ROTARY PUMP." A communication
from abroad by Herman Himmelman, of Helsingborg, in the Kingdom of
Sweden.
The object of this Invention is the construction of a simple and practical apparatus
for raising water or other liquids,
The improved pump consists of a main pipe A connected to or formed with two
side or branch pipes a, a, projecting more or less at right angles from the said main
pipe A, which is connected to a suction pipe or vessel B in such manner that the
main pipe A and its branch pipes a, a, are free to rotate independantly of the
suction pipe or vessel B, which remains stationary and extends down into the liquid
to be raised.
The suction pipe B may be made straight or bent, and may be made of metal,
indiarubber, or other suitable material, according to circumstances.
At the ends of the branch pipes a, a, are placed hinged flaps or valves b, b, which
may be made to close the ends or nozzles of the said pipes by pressing down a
collar or ring C surrounding the main pipe, and connected by bars or links d, d,
with arms on the said flaps or valves b, b. When the said collar or ring C
is not pressed down it is pushed up by a spiral spring e, whereby the flaps or
valves b, b, are reopened, as shown in dotted lines. These arrangements may
however be modified in various ways to suit circumstances.
The suction pipe B is provided at its lower open end with a valve ſ, which may
be closed or opened from above by rods or bars g, g, arranged for that purpose. At
the upper end of the main pipe A is an opening h provided with a valve i, and
suitable arrangements may also be applied at the saine end for suspending the pump
if required.
The main end branch pipes A and a, a, may be set in rotary motion by means of
tooth gearing K. or other suitable driving apparatus.
When the apparatus is to be used the valves b, b, on the ends of the branch pipes
and the valve at the bottom of the suction pipe are to be closed, and the pumps
filled with liquid through the valve h in the top of the main pipe, which valve
should then be closed.
The pump is then placed in the liquid to be raised, and the main and branch
pipes Â and a, a, caused to rotate, the valves b, b, on the ends of the branch
pipes a, a, and the valves fat the bottom of the suction pipe Bare then opened, and
the centrifugal force acts to raise the liquid and to force it out through the nozzles
of the branch pipes a, a, or through holes made for that purpose.
Having now described the nature of the said Invention and the manner in which
the same is to or may be carried into effect, I would have it understood that I
do not confine myself to the precise details described and shown, as they may be
varied without departing from the nature of the said Invention, but what I do
claim is,-

page_text: The improved rotary pump, arranged and constructed substantially as herein-
before described and illustrated in the Drawing hereto annexed.
In witness whereof, I, the said Lorentz Albert Groth, have hereunto set
my hand and seal, this Eleventh day of April, in the year of our Lord
One thousand eight hundred and eighty two.
LORENTZ ALBERT GROTH (re)