IMPROVEMENTS IN PUMPS
Year: 1881

page_text: LETTERS PATENT to Henry Harris Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for an Invention
of "IMPROVEMENTS IN PUMPS." A communication from abroad by Pierre
Eymard Jay, of the City and State of New York, United States of
America.
COMPLETE SPECIFICATION filed by the said Henry Harris Lake at the
Office of the Commissioners of Patents on the 26th July 1881.
HENRY HARRIS LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN PUMPS." A communi-
cation from abroad by Pierre Eymard Jay, of the City and State of New York,
United States of America.
This Invention is designed to ensure easy access to the packings of pump
cylinders, and also to prevent the undue wear or grinding of the packing from
contact of dust, grit, and the like. To this end the said Invention consists in certain
novel combinations of parts, as hereinafter described.
In the accompanying Drawing,-
Figure 1 is a vertical longitudinal section of an apparatus or pump embodying
the said Invention; and
Figure 2 is a vertical section thereof on the line x, x, Figure 1.
Figure 3 is a detail view of a portion of the said apparatus.
Figure 4 is a longitudinal section; and
Figure 5, a transverse section on the line y, y, Figure 4, shewing modifications in
the form of certain parts of the said apparatus.
A and B are two pump cylinders placed in line with each other, but at a
sufficient distance apart to permit access to the interior of the innermost end
portion of each cylinder when the glands are removed. The inner surface of the
inner end portion of each of the cylinders A, B, is provided with an inwardly
projecting rib or bearing a, which bears against the adjacent cylindric surface of
the plunger C in such a manner as to prevent the said plunger from coming in
contact with the main portion of the length of the interior of the cylinder. This.
bearing a moreover has but comparatively light contact, and serves to aid in
Prive 6d1

page_text: supporting the packing D, which is placed within the annular chambers provided
by the offset portions b at the inner end of each cylinder. The bottom of each of
these chambers is made sloping or inclined, as shewn in Figure 1, and in each of
the said chambers is placed a ring, gland, or annulus E, having a surface which
also slopes, but in a direction opposite to that of the bottoms of the aforesaid
chambers. The rings E press upon the packing, and the latter being acted upon
by the aforesaid opposing inclined surfaces is crowded or compressed around the
plunger to the required extent. The rings E are provided with peripherical
flanges c, which coincide in position with similar flanges d on the inner extremities
of the cylinders A, B. These flanges care bolted to the flanges & by bolts and
nuts e, so that by tightening the said bolts the rings may be drawn inward to
compress the packing to any extent desired. The packing may be of any usual or
suitable kind.
By removing the aforesaid rings access is readily provided to the packing, or to
the chambers in which the same is placed, so that the said packing may be readily
removed, adjusted, or replaced, as the case may be. Furthermore, as the bearings a
approach very closely to the plunger, it follows that the packing is supported
practically to its point of contact with the said plunger, and the uniform pressure
and contact of the said packing upon the latter is secured.
In order to prevent dirt, grit, and the like from finding its way to the packing
(which would result in grinding or cutting the surface of the plunger), there is
combined with the inner end portions of the cylinders, their packings D, and the
rings E, a circular jacket G formed in two semi-circular halves or sections f, g, as
shewn in Figure 3. These two halves are hinged together at one side, as repre-
sented at h, and are connected at the other side by bolts a¹ passing through studs
or flanges b¹ formed on the free ends of the said halves f, g. The said jacket is
provided with inwardly projecting circumferential flanges m, n, which extend
over the flanges & of the cylinders, as represented in Figure 1, when the said jacket
is placed in position. When this jacket is placed around the inner end portions
(and their adjuncts) of the two cylinders, the free ends of the said-jacket are
fastened together, as above described, so as to enclose the said inner end portions of
the cylinders and the packing devices in such a manner as to effectually exclude all
dust, grit, and the like therefrom.
The plunger C, as shown in Figure 1, is common to both cylinders, the latter
being fixed and having their packing devices accessible by virtue of the space
between them. The said plunger has at each end an axial piston rod. One of
these rods-H-serves as a guide merely to act in conjunction with the other rod I to
afford axial support to the plunger to prevent it from pressing too hard in a lateral
direction against the bearings a or against the packing. Where the rod I passes
through the head of its adjacent cylinder B, it is packed by a suitable stuffing
box K. In like manner the opposite rod H is packed by a suitable stuffing box L,
where it passes through the head of the cylinder A; but in addition to this there is
provided on the outwardly extending end of the said rod H a stationary sleeve N,
which is affixed to the head of the cylinder, and which surrounding the said projecting
portion of the said rod effectually prevents the admission of dust, grit, and the like
to the adjacent stuffing box, the said sleeve being closely but not tightly fitted to
the said rod. The inlet and outlet ports, pipes, and connections have substantially
the same relation to the opposite outer end portions of the two coincident cylinders
as they ordinarily have to the two opposite ends of an ordinary pump barrel, and
being clearly shewn in Figure 1 of the Drawing, require no detail description here.
The two cylinders are of substantially the same capacity, and the quantity pumped
by each is substantially the same, so that a very effective and uniformly operating
pump is secured.
It will be understood that the punip should be provided with a suitable air
chamber S, and when intended to be used in a horizontal position, suitably placed
upon a suitable base -R. When the pump is to be used vertically it should be
secured upon a support of suitable character and construction.

page_text: Figures 4 and 5 represent on a somewhat different scale a modified arrangement
of the adjuncts of the pump cylinders and other parts, the valve chests being shown
as set close down upon the ends of the cylinder, and constructed with lateral
bonnets secured in place by set screws 71, so that when the said bonnets are
removed access may be had through the side openings s to the interior of the valve
chests when for any purpose such access is necessary, as for example when it is
desired to adjust, repair, or replace the said valves. '
Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the mauner of performing the same, I wish it understood
that I claim,-
First. The two axially coincident cylinders A, B, each constructed with an
offset band a flange d, and each provided with its own packing D, gland E, and
bolts e, and arranged with a space between them sufficient to permit access to their
interiors, in combination with suitable pipes connecting the said cylinders, and a
piston common to both of the same, the whole constructed, combined, and operating
substantially as above set forth and for the purpose specified.
Second. The combination of the divided or sectional jacket with the inner ends
of the two separated, and axially' coincident cylinders A and B provided with
packing and compressing rings or glands, all substantially as above set forth and for
the purpose specified.
In witness whereof, I, the said Henry Harris Lake, have hereunto set ny
hand and seal, this Twenty sixth day of July, in the year of our Lord
One thousand eight hundred and eighty one.
HENRY H. LAKE. (L.S.)