IMPROVEMENTS IN PUMPS
Year: 1879

page_text: 18
LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for the Invention of
IMPROVEMENTS IN PUMPS." A communication from abroad by Charles
Tyson, of Philadelphia, Pennsylvania, United States of America, Mechanical
Engineer.
Sealed the 11th July 1879, and dated the 15th January 1879.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 15th January 1879.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN PUMPS." [A communication
from abroad by Charles Tyson, of Philadelphia, Pennsylvania, United States of
America, Mechanical Engineer.]
This Invention relates to force pumps, and comprises a piston formed with a valve
seat and moveable on the piston rod which carries the valve, whereby by the ascent
and descent of the rod the piston is shifted so as to open and close the valve, thus
supplying the barrel with water and forcing it therefrom, a simple, inexpensive, and
easily operated pump being thereby produced.
It also comprises a force pump likewise adapted to replenish the air chamber with
air when the prior supply therein is absorbed by the water.
In carrying the said Invention into practice I fit within the barrel a piston
consisting of a suitably packed head or plunger fitted loosely on the piston rod so
as to have sliding motions thereon to a limited extent. On the said piston rod is a
valve formed therewith or secured thereto, and its seat is on the upper side of the
said piston. The stem portion of the rod which passes through the piston is grooved
or winged so as to leave passages between said portion and the piston, or, if desired,
the said passages may be formed around the central opening of the piston. At or
near the lower end of the rod there is a pin or stop fitted to or formed with the rod,
for preventing displacement of the piston, and limiting the motions of the same at
said lower end, the said pin or stop and the aforesaid valve being on opposite sides
of the piston.
The barrel may be submerged or provided with an inlet or induction pipe at or
near its upper end, and an eduction pipo which leads to the place of service from
the bottom of the barrel.
The operation is as follows:-
When the piston has made its descent the said valve rests on its seat, and is

page_text: aocordingly closed, and the space in the barrel above the piston is filled with water.
The piston rod is now elevated, and the valve moves from its seat, thus operating
the valve. As the rod continues its ascent the said pin or stop causes the piston to
rise, the water meanwhile flowing through the aforesaid passages into the barrel
below the piston. The piston rod is again depressed, and the valve closed on its
seat, whereby the water in the barrel below the piston is forced by the latter out of
the barrel into the eduction pipe, and thus to the required place. On the next
ascent of the piston the valve is opened and a fresh supply of water admitted into
the barrel below the piston, the alternate replenishing and emptying of the barrel
or working of the pump continuing as required or desired.
The said pump is constructed of few parts, whereby it is simple and inexpensive
and easily operated, and not liable to derangement.
A proper check valve is placed at the base of the barrel and in the eduction pipe
to prevent return of water forced from the barrel. As air in the chambers becomes
absorbed by the water therein they may be readily replenished with air for neces-
sary purposes. To accomplish this, when an air chamber is used with the said
pump the barrel is deprived of its supply of water, and the pumping operations aro
continued, whereby air is taken by the pump and forced into the chamber, after
which the barrel is again supplied with water, the pumping resumed, and the water
is forced into the air chamber.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
14th July 1879.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN PUMPS." A communication
from abroad by Charles Tyson, of Philadelphia, Pennsylvania, United States of
America, Mechanical Engineer.
This Invention relates to force pumps, and comprises a piston formed with a
valve seat and movable on the piston rod which carries the valve, so that by the
ascent and descent of the rod the piston is shifted to open and close the valve, thus
supplying the barrel with water, and forcing it therefrom, a simple, inexpensive, and
casily operated pump being thus produced.
It also comprises a force pump adapted to replenish the air chamber with air
when the prior supply therein is absorbed by the water.
In the accompanying Drawing,―
Figure 1 is a side elevation of a pump embodying this Invention.
Figures 2 and 3 are central vertical sections thereof.
Figure 4 is a horizontal section on the line x, x, Figure 2.
Similar letters indicate corresponding parts throughout the Drawing.
A represents the barrel, which may be submerged or provided with an inlot or
induction pipe at or near its upper end, and B represents the eduction pipe which
leads to the place of service from the bottom of the barrel.
Within the barrel is placed the piston C, consisting of a suitably packed head or
plunger fitted loosely on the piston rod D, so as to have sliding motion thereon to a
limited extent. On the rod D is a valve E formed with or secured thereto, and its
sent E¹ is on the upper side of the piston C. The stem portion of the rod which
passes through the piston is grooved or winged, to leave passages a between the
said portion and the piston, or if desired the passages a may be formed around the
central opening of the piston. At or near the lower end of the rod there is a pin or
stop b fitted to or formed with the rod for preventing displacement of the piston
and limiting the motions of the same at said lower end, the stop 6 and valve E
being on opposite sides of the piston.
The operation of this Invention is as follows, that is to say :-
When the piston has made its descent the valve E rests on its seat, and is accord-
ingly closed, and the space in the barrel above the piston is filled with water. The
piston rod is now elevated, and the valve moves from its seat. As the rod continues
its ascent the stop b causes the piston to rise, the water meanwhile flowing through
the passages a into the barrel below the piston. The piston rod is again depressed
and the valve closed on its seat, whereby the water in the barrel below the piston
is forced by the latter out of the barrel into the eduction pipe, and thus to the
required place. On the next ascent of the piston the said valve is opened, and a
fresh supply of water is admitted into the barrel below the piston, the alternate
replenishing and emptying of the barrel or working of the pump continuing as
required.
It will be observed that the said pump is constructed of few parts; therefore it
is simple, inexpensive, easily operated, and not liable to derangement.
A proper check valve is placed at the base of the barrel and in the eduction pipe,
to prevent return of water forced from the barrel. As air in the chambers becomes
absorbed by the water thorein, the said chambers may be readily replenished with
air. To accomplish this result when an air chamber is used with the said pump,
the barrel is deprived of its supply of water and the pumping operations are con-
tinued, whereby air is taken by the pump and forced into the chamber, then the
said barrel is again supplied with water, the pumping is resumed, and the water is
forced into the air chamber.

page_text: Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim,
First. A force pump which has a barrel with means for induction at or near the
top and for eduction at or near the bottom thereof, a piston movable on the piston
rod and having a valve seat on its upper face, and a piston-rod with a valve and
stop on opposite sides of the piston, substanntially as and for the purpose set
forth.
Second. A water forco pump adapted to replenish the air chamber with air,
substantially as and for the purpose set forth.
In witness whereof, I, tho said William Robert Lake, have hereunto set my
hand and seal, this Fourteenth day of July, in the year of our Lord One
thousand eight hundred and seventy-nine.
W. ROB. LAKE. (L.S.)