Improvements in Governors for Feed-pumps.
Year: 1894

page_text: Date of Application, 8th May, 1891-Accepted, 21st July, 1894
COMPLETE SPECIFICATION.
Improvements in Governors for Feed-pumps.
I, JOSHUA THOMAS, of No. 4 Lees Court in the City of Cleveland, County of
Cuyahoga and State of Ohio, U.S.A. Manufacturer, 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 :-
Referring to the accompanying drawing
Figure 1 is a rear end elevation of two of a battery of boilers showing the pipe
connections with the same, and a steam pump having my new governor attached.
Figure 2 is a detached view of the governor device, partly in section, showing its
construction.
This invention relates to pumps for supplying water to steam boilers, and has
for its object to provide an automatic means for regulating the supply, and it
consists in the construction and combination of a device arranged between the
steam pipe leading to the steam cylinder of the pump, and the water discharge pipe
from the pump leading to the boiler or boilers, whereby the throttle valve in the
steam pipe is automatically opened and closed in accordance with the variable
pressure in the said water pipe or air chamber of the pump.
A represents the rear ends of two of a battery of boilers, which may be of
any of the well known constructions, and P is a steam pump for feeding the said
battery.
B is a steam-pipe between the boiler and the steam-chest of the pump-engine.
C is a discharge-pipe from the pump-cylinder to the boilers. C₁, C₁ are check-
valves. F is a feed-water regulator for which a Patent has already been granted
to me, dated 27th December, 1892, No. 23,869, one of the regulators F being
preferably attached to each boiler. The said regulators here act independently
of one another to regulate the supply of water to their respective boilers, instead
of being employed, as in the example of their application given in the above
cited Specification, to control the action of the pump.
The subject of the present application is an automatic pump governor whereby
the action of the pump is controlled as required, the said pump and the
regulators F being so arranged that, whilst the pump will operate to feed one
or more of the boilers as may be required, the said regulators will operate
separately or independently of each other to maintain the water-level in their
respective boilers. The said automatic pump governor is described as follows:-
D is a frame, one end of which is connected with the steam-valve E, in the
steam-pipe B, and is provided with a stuffing-box through which the valve-stem G
passes. In the other end of the frame D is provided a small cylinder H in which
is a piston I, having its rod joined to the valve-stem G. The cylinder H is
connected by a union and T-connection with the discharge-pipe C, or it may be
connected directly with the air-chamber J of the pump if desired, or as may be
most convenient. Between the uniou and T-connection is provided a stop-cock for
closing said communication when desired.
K is a cross-bar on the piston-rod, joined to the cylinder end of the frame D
by the rods L, L, and a spiral spring S is placed on the piston-rod between the
piston and said cross-bar K. m is a coupling-nut on the piston-rod for adjusting
the length of the rod and the valve-stem. O is a guage suitably attached to
the discharge-pipe or air-chamber by which the pressure may be readily
ascertained.
The areas of the valve E and of the piston I are equal and are opposed to each
other, so that, when the steam pressure plus the pressure due to the spring S

page_text: balances the water pressure, the pump would cease to act, should the water
pressure go down the steam pressure will force the valve E open and set the
pump going until the water pressure is again raised to equal the steam pressure
plus that due to the spring.
The design of the spring is, it will be seen, to give some advantage to the steam
valve. By tightening up the nuts on the rods L, L, the spring is forced against
the piston head, thereby creating as much or as little pressure as desired, above the
steam pressure, and this pressure will be maintained, following the steam pressure
up or down, thus maintaining an even pressure that puts water in the boiler
whether the steam pressure is either high or low.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
The combination with the pump P of the frame D the valve E in steam pipe B,
connected to one end of said frame, cylinder H in opposite end of said frame D,
and connected by pipe with water pipe C; piston I in said cylinder H having its
rod joined to the valve stem G, cross-bar K on said piston rod connected by
rods L, L with the frame D, and the spring S on the piston rod between the
cross-bar and piston, all constructed to operate substantially as described.
Dated this 8th of May 1804
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.