Improvements in Pumps Worked by Hydraulic Pressure.
Year: 1889

page_text: Date of Application, 21st Feb., 1889
Complete Specification Left, 21st Nov., 1889-Accepted, 21st Dec., 188.
PROVISIONAL
SPECIFICATION.
Improvements in Pumps Worked by Hydraulic Pressure.
I. CHARLES JAMES APPLEBY, of 22 Walbrook, in the City of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to pumps worked by hydraulic pressure for raising or forcing
sewage or other liquids.
According to my invention, the pump cylinder stands vertical having at its lower
end a suction valve on the one side and a delivery valve on the opposite side, mounted
in branches which are preferably provided with side doors to give access to the valves.
The plunger of the pump works through a stuffing box at the top of the pump
cylinder, and it has projecting up from its centre a small plunger which works
through a stuffing box in a stationary inverted pressure cylinder, which is supported
by framing extending up from the pump cylinder. This framing also carries pulleys
over which pass chains attached to the pump plunger and to counterweights.
At the upper end of the pressure cylinder on one side thereof is a cylindrical slide
case fitted with two piston valves rigidly connected by a rod, the lower piston being
larger in diameter than the upper piston, which governs a lateral passage to the
pressure cylinder, by its upstroke putting that passage in communication with the
body of the slide case, and by its downstroke putting it in communication with a
discharge pipe. The body of the slide case between the piston is constantly supplied
with high pressure water, and at the bottom of the slide case there is a cock governing
a supply and discharge of high pressure water, this cock having a lever worked by
adjustable tappets on a rod projecting up from the main plunger. As the main
plunger rises in obedience to the counterweights and such pressure as the supply of
the pump may have, the slide valve is in such a position that the contents of the
pressure cylinder are discharged until the lower tappet acts on the cock, admitting
high pressure water under the larger piston. The upper valve piston is thus raised
so as to stop the discharge from the pressure cylinder and put that cylinder in
communication with the high pressure supply in the body of the slide case.
The small plunger being then forced down moves down the main plunger until the
upper tappet acts on the cock reversing the movement.
Dated this 21st lov of Fabru 1880
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pumps Worked by Hydraulic Pressure.
I, CHARLES JAMES APPLEBY of 22 Walbrook in the City of London, Engineer
do hereby declare the nature of this invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
My invention relates to pumps worked by hydraulic pressure for raising or forcing
sewage or other liquids.
According to my invention, the pump cylinder stands vertical having at its lower
end a suction valve on the one side and a delivery valve on the opposite side, mounted
in branches which are preferably provided with side doors to give access to the valves.
The plunger of the pump works through a stuffing box at the top of the pump
cylinder and it has projecting up from its centre a smaller plunger which works
through a stuffing box in a stationary inverted pressure cylinder which is supported
by framing extending up from the pump cylinder. This framing also carries pullies
over which pass chains attached to the pump plunger and to counterweights.

page_text: At the upper end of the pressure cylinder on one side thereof is a cylindrical slide
case fitted with two piston valves rigidly connected by a rod, the lower piston being
larger in diameter than the upper piston which governs a lateral passage to the
pressure cylinder, by its upstroke putting that passage in communication with the
body of the slide case and by its downstroke putting it in communication with a
discharge pipe. The body of the slide case between the pistons is constantly supplied
with high pressure water and the piston valve in the slide case is moved by a lever
worked by tappets from the main plunger. As the main plunger rises in obedience
to the counterweights and such pressure as the supply of the pump may have, the
slide valve is in such a position that the contents of the pressure cylinder are
discharged until the lower tappet acts on the slide valve raising it so as to stop the
discharge from the pressure cylinder and to put that cylinder in communication with
the high pressure supply in the body of the slide case.
The small plunger being then forced down moves down the main plunger until the
upper tappet acts on the slide valve reversing the movement.
Fig. 1 of the accompanying drawings is a vertical section. Fig. 2 is a plan of a
pump worked by hydraulic pressure according to my invention. Fig. 3 is an end
view, and Fig. 4 is a vertical section of the slide valve drawn to an enlarged scale.
A is the pump cylinder and B is its plunger which works through a cup leather or
other suitable packing. C is the admission and D the discharge valve. To the main
plunger B is attached the central hydraulic plunger E which works through a cup
leather or packing in the hydraulic cylinder F. This cylinder projects down from a
crosshead G which is secured to the cylinder A by tie bolts H. In the crosshead G
are mounted pullies I over which pass chains attached to the plunger B and to a
counterweight J. At one side of the pump is a tappet rod K having two projecting
tappets kk which are moved respectively by a stud M projecting from the main
plunger B as it approaches the two extremes of its stroke. The upper end of the
rod K works through a guide g in the crosshead G, its lower end also works through
a guide a on the cylinder A. I find it convenient to link the rod K to the plunger of
a small pump L which may serve to empty the well or space in which the pump is
situated of such liquid as may leak into it. The rod K when it is moved by the
action on its tappets, moves a bell crank lever N on which there is a tumbling
weight n that can fall over in either direction against a fixed stop moving the slide
rod p. P is the slide valve casing having fitted in it two pistons Q 9 attached to
the rod p. By a pipe R water under pressure is admitted to the slide case between
the two pistons; a pipe S leads to the hydraulic cylinder F and a pipe T leads to a
discharge. As shewn in Fig. 4 the pistons are in such a position that the water
under pressure passes by the pipe S to the cylinder F to force down its plunger E
and the main plunger B. When the pistons Qq are raised so that q is above the
mouth of S, the water from the hydraulic cylinder F passes by the pipe S to the
discharge pipe T. allowing the plungers B and E to be raised partly by the counter-
weight J and partly, it may be, by the pressure of the liquid entering the cylinder A
by the admission valve C.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what [
claim is :
A pump worked by hydraulic pressure consisting of a pump cylinder with
admission and discharge valves, its plunger having within it a hydraulic plunger
working in a hydraulic cylinder which projects down from a crosshead secured to the
pump cylinder by tie bolts, and which has the admission and emission of water under
pressure governed by a slide valve moved by tappets acted on by the main plunger,
substantially as described.
01
ABEL & IMRAY,
Agents for the Applicant.