IMPROVEMENTS IN APPARATUS TO ADMIT OF THE CONTINUOUS RUNNING OF A PUMP OR OTHER Apparatus SupPLYING FLUID THROUGH PIPES WHEN THE FLOW THROUGH THE PIPES IS FOR A TIME WHOLLY OR IN PART ARRESTED, WITHOUT INJURY TO THE PIPES AND WITHOUT WASTE OF FLUID
Year: 1874

page_text: LETTERS PATENT to Francis Henry Hambleton, of Baltimore, in the
United States of America, now residing at Kensington Square, in
the County of Middlesex, for the Invention of "IMPROVEMENTS IN
APPARATUS TO ADMIT OF THE CONTINUOUS RUNNING OF A PUMP OR OTHER
Apparatus SupPLYING FLUID THROUGH PIPES WHEN THE FLOW THROUGH THE
PIPES IS FOR A TIME WHOLLY OR IN PART ARRESTED, WITHOUT INJURY TO
THE PIPES AND WITHOUT WASTE OF FLUID." -A communication from
abroad by John E. Prunty, of Baltimore, in the United States of
America.
PROVISIONAL SPECIFICATION left by the said Francis Henry Ham-
bleton at the Office of the Commissioners of Patents, with his
Petition, on the 26th October 1874.
I, FRANCIS HENRY HAMBLETON, of Baltimore, in the United States
5 of America, now residing at Kensington Square, in the County of Mid-
dlesex, do hereby declare the nature of the said Invention for "Iμ-
PROVEMENTS IN APPARATUS TO ADMIT OF THE CONTINUOUS RUNNING OF A PUMP OR

page_text: OTHER APPARATUS SUPPLYING FLUID THROUGH PIPES WHEN THE FLOW THROUGH THE
PIPES IS FOR A TIME WHOLLY OR IN PART ARRESTED, WITHOUT INJURY TO THE
PIPES AND WITHOUT WASTE OF FLUID," to be as follows:-
The object of this Invention is automatically to prevent damage to
pipes conveying fluids under pressure, and to prevent waste of fluid 5
when the regular outlet or outlets from the pipe shall be for a time
wholly or in part closed, and the pump or other supply apparatus shall
continue to run.
For this purpose an apparatus is employed consisting of a partially
balanced valve in a side chamber on a pipe or channel through which 1
the fluid flows. The valve is held shut when the regular outlets are
opened by a lever, the end of which extends into the current in the main
pipe. The currents impinging on the end of this lever prevent the
partially balanced valve from opening.
When the fluid is prevented from escaping at the regular outlets the 1
current is arrested, and the lever looses its power of holding the valve
closed; the pressure acting on the unbalanced portion of the valve then
opens it, and the fluid escapes through the valve without strain to the
pipes, and is conducted into the under side of the suction valve, whero
a pump is used for forcing fluid, in which case the fluid will simply
circulate through the pump without materially increasing the pressure
in the pipe, or the fluid may be allowed to run to waste.
When the waste pipe of the escape is connected on to the suction of
the pump, and the power of the lever over the partially balanced valve
is altered, this alteration, where it is sufficient to interfere with the
satisfactory operation of the valve, is compensated for by a spring which
can be adjusted to the required tension to counteract the effect of the
vacuum over the valve.
:
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Francis Henry Hambleton in the Great Seal 30
Patent Office on the 26th April 1875.

page_text: now residing at Kensington Square, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of October, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Francis Henry Hambleton, Hor special
license that I, the said Francis Henry Hambleton, my executors,.
administrators, and assigns, or such others as I, the said Francis Henry
Hambleton, my 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 APPARATUS TO ADMIT OF THE CONTINUOUS
RUNNING OF A PUMP OR OTHER APPARATUS SUPPLYING FLUID THROUGH PIPES
WHEN THE FLOW THROUGH THE PIPES IS FOR A TIME WHOLLY OR IN PART ARRESTED,
WITHOUT INJURY TO THE PIPES AND WITHOUT WASTE OF FLUID" (a communi-
cation to me from abroad by John E. Prunty, of Baltimore, in the
United States of America), upon the condition (amongst others).
that I, the said Francis Henry Hambleton, my executors or admini-
strators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the sanie 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 I, the said Francis Henry Hambleton, 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 :—
My Invention consists in improvements in apparatus to admit of the
continuous running of A numn or other apparatus supplying fluid

page_text: The construction and principle of operation will be understood by the
following description with reference to the accompanying Drawings.
The apparatus consists of a main chamber A, Figs. 1 and 2, placed
between the pump or other apparatus supplying fluid and the pipes for
conveying and distributing the same.
The chamber A has a clear way through it equal to the main distri-
buting pipe. On the side of this chamber A are two ports B, B, which
are covered by a valve chamber C. On the side of this valve chamber C
is an opening D for the escape of the surplus fluid when the distributing
pipes are taking less than is being forced into the main chamber.
In the valve chamber C is a partially balanced valve E, E, which is so
proportioned that it would always remain open when subjected to the
static pressure only of the fluid. This valve is controlled automatically
by the lever F, so that it will entirely close and remain so when all the
fluid supplied to the main chamber is drawn off by the distributing or
utilizing pipe.
The lever F is operated by the current through the main chamber A,
which current impinges on the free end of the lever, and causes it to
move in the direction of the current, and to carry the valve E, E, to
which it is connected towards its seat until it closes, and thus prevents
all escape of fluid through the ports B, B.
In case a portion only of the fluid forced into the chamber A is
allowed to escape through the conveying pipe the current exercises only
a limited control over the lever, and the tendency of the partially
balanced escape valve to open becomes superior to the closing power of.
the lever, and draws it back sufficiently to allow the partial opening of
the valve necessary to permit the surplus fluid to escape without mate.
rially changing the pressure in the pipes.
When no fluid is being drawn from the conveying pipe the valve opens
entirely.
When it is required to return the surplus fluid back to the suction
side of the pump to prevent waste a connecting pipe is attached between
it and the escape opening on the valve chamber.