IMPROVEMENTS IN VALVES FOR FEED OR FORCE PUMPS
Year: 1884

page_text: $6
COMPLEIE
DIECIFICATION.
I, JAMES WEIR, of 49 Jamaica Street, Glasgow, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of my said Invention for
IMPROVEMENTS IN VALVES FOR FEED OR FORCE PUMPS" and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
My said Invention has for its object to construct valves for feed or force pumps
in an improved manner and so as to be better adapted than existing valves for.
working with high pressure, as for example, for feeding steam boilers carrying
steam of 100 pounds and upwards per square inch.
In carrying out my Invention a number of small valves are grouped together the
valves having conical bearing surfaces and being formed with guide feathers on
their undersides and each with a stout stem on its upper side to work through a
guide eye and to strike a stop plate or guard which limits the amount of opening.
The upper guides for the valve stems are made quite detached from the stop plate
or guard so as not to be subjected to any concussive action. The openings and seats
for a group of valves are made in a circular plate which takes the place of the
seating for a single valve. Where convenient the foot or inlet valves and the
discharge valves for one end of a pump are placed in the same vertical line, and
are fixed and adjusted by simple appliances hereinafter described; the two sets of
valves may however be placed quite apart from each other.
On the accompanying Sheet of explanatory Drawings, Figure, 1, is a vertical
section showing two sets of my improved valves in place. Figure, 2, is a plan of
the guard for the foot or inlet valves, Figure, 3, is a plan of the guide piece for the
same valves, and Figure, 4, is a plan showing the valves and their seat piece.
Figures, 5, 6, and 7, are plans respectively of the guard, guide piece, and valves
and seat piece, for the discharge valves. In these Drawings the same reference
numerals are used to mark the same or like parts wherever they are repeated.
The valves, 8, are made by preference of the same size for both inlet and
discharge, but fewer are required for the discharge than for the inlet, there being,
in the example delineated, seven inlet valves and four discharge valves.
Each
valve, 8, consists of a disk with a conical bearing edge, with guide feathers, 9, on
its underside to work in the opening in the seat piece, 10, and with a stout
stem, 11, on its upper side. The seat piece, 10, for a group of valves is made
בלים
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page_text: circular and to fit into a deep groove or cylindrical socket in the valve box, 12,
being made tight in its socket by hemp or other packing; and it is formed with
conical seats for the valves. The stems, 11, of the valves work through guide
eyes, 13, in a guide piece, 14, like a grating as shown in Figure, 3, for the group of
seven inlet valves and in Figure, 6, for the group of four discharge valves. Above
each guide piece, 14, there is a stop plate or guard, 15, which is by preference
made of wrought iron, the valves, 8, the seat pieces, 10, and the guide pieces, 14,
being by preference made of brass. Each guard, 15, rests or bears on studs, 16, of
which one is shown separately in side elevation between Figures, 3, and 6. These
studs, 16, are made with their ends of smaller diameter than their middle parts,
and their bottom ends fit in sockets in the seat pieces, 10, whilst their upper ends
pass through eyes, 17, in the guide pieces, 14, and into eyes or sockets, 18, in the
guards, 15. The guide pieces, 14, rest on the larger middle parts of the studs, 16,
and the guards, 15, rest on the bosses of the eyes, 17, of the guide pieces, 14.
These bosses of the stud eyes, 17, are deeper than the bosses of the eyes, 13, which
guide the valve stems, 11, so that the guards, 15, do not touch the latter which are
consequently not affected by the concussion of the valve stems, 11, striking the
guards, 15. The guard, 15, for the upper or discharge valves, is held down by a
pin, 19, screwed through the top cover, 20, of the valve box, 12. The lower
guard, 15, for the inlet valves, is held down by a pin, 21, formed with an hexagonal.
head, and which is screwed into a short iron bar, 22, bearing up against a central
downwardly projecting boss, 23, on the upper seat piece, 10. The pin, 21, projects
up into a slot or groove in the boss, 23, above, and the bar, 22, is kept in position
and prevented from turning by its outer end being entered into a socket provided
for it in a cover, 24, by which access is given to the lower or inlet valves. When
this cover, 24, is opened the lower valves and their accessory parts can be taken
out without disturbing the upper valves.
Having thus particularly described the nature of my said Invention and in
what manner the same is to be performed I proceed. to ascertain the distinctive
features of novelty thereof by declaring that what I claim is:
1. The combination in an arrangement of valves for feed or force pumps, of a
group of small valves, a guide piece for stems on the upper sides of the valves, and
a guard or stop plate, the guides for the stems: being separate from the guards,
substantially as hereinbefore described, and as shown in the accompanying
Drawings.
.
2. The combination of a group of small valves with a circular seat piece for the
group substantially as hereinbefore described.