IMPROVE- MENTS IN DIRECT ACTING STEAM PUMPS, COMMONLY KNOWN AS PULSOMETERS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Peter Dunlop at the Office of the
Commissioners of Patents on the 24th March 1883.
PETER DUNLOP of Clapham in the County of Surrey [Engineer,]-" IMPROVE-
MENTS IN DIRECT ACTING STEAM PUMPS, COMMONLY KNOWN AS PULSOMETERS "
This Invention has for its object the arrangement and construction of
"pulsometers,” whereby their capacity is increased and the manufacture in part
simplified.
In carrying out my Invention, I proceed mainly as follows:-
The first part has reference to the admission valve and steam passages or nozzles
in the neck of pulsometers.
As pulsometers are now constructed, a flat valve or globular valve is caused to-
oscillate from one side of the neck to the other, thereby opening and closing each
steam port or nozzle on opposite sides of the neck, thus admitting steam in one
chamber of the pump to expel the water, while the other chamber is being filled
from the suction pipe, and vice versa
According to my Invention, I use the oscillating valve between two faces, as is
now done, but I construct in each of these faces two or more openings for the
admission of steam to two or more chambers, and also two or more admission
openings on the opposite side to two or more chambers, these openings on each side
being controlled by a valve or valves of either flat or globular form, preferably the
latter.
The valve seat or neck may be in one piece with the ports cast therein, or it
may be in a separate piece or pieces, with the ports cast in the piece or pieces.-
When the neck or valve seat is in a separate piece or pieces, a cap is fitted over as
is now done in pulsometers.
The second part of my Invention has reference to the combining of three, four or
more pump chambers, all controlled. by one steam admission valve and ports, as
hereinbefore stated,-these chambers may be each distinct, or combined in any
other number; or they may all be cast together.-This part of the Invention is
applicable to existing pulsometers.
The third part of my Invention has reference to the arrangement of suction
and delivery valves in pulsometers, whereby the apparatus is made more compact
than those at present in use, and the construction simplified.-This arrangement of

page_text: suction and delivery valves is especially adapted to my arrangement of pump
chambers, but it is also applicable to pulsometers as now constructed-The valve
seats may be cast with or made separate from the pump casting; if the latter, the
valves may be fitted up complete on their seats, and the whole put into place in
the pump. The valves and valve seats are thus rendered easy of repair, and they
can easily be withdrawn from the pump.--These valves may be either arranged
vertical inclined, or horizontal, as is now done in pulsometers.
The fourth part of my Invention has reference to the combining of pulsometer
chambers with one steam valve, so that, one or more chambers may be arranged to
draw from the suction only, and the others to force the water only, say in a four
chamber pulsometer, two with ports on one side of the neck may draw the water
into the pump, and deliver it into a chamber or vessel connected to or separate
from the pump, while the other two chambers with their steam admission ports on
the opposite side of neck can take the water from this vessel or chamber and force
it to the required height, or into a vessel or vessels under pressure, when the
apparatus is used for forcing or feeding into such vessels-I therefore make the
action of such pulsometers more satisfactory than at present, especially when used'
for forcing or feeding vessels under pressure.