Year: 1897

page_text: J. Outlet on which a pipe can be bolted open to the atmosphere.
K Crosshead through which the compression nut L is screwd on to Spiral Spring.
L the compression nut.
M Cotter through Spindle.
Its action may be described thus: before the pump is started, the Cotter M is
taken out the Valve G and Float D drops down as shown in figure 1.
When pump
is started the pressure of water on bottom of Float D and back of, Valve G forces
Valve up to face I. I. as shown in Figure 2. it is kept to face by pressure of water.
When the Pump loses its Water and admits air into Pump Chamber the pressure
on back of Valve G is diminished, the Spiral Spring forces the Valve G open. as shown
in figure 1. and admits free escape for the Air, the pump takes its water and
Immediately the pressure of water under float D and back of Valve G forces Valve G
to face,
ROBERT ROBERTS,
Applicant.

page_text: ROBERT ROBERTS 56 Newry Street Holyhead in the County of Anglesey. 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:
This invention consists of improvements in escape valves for use upon pumps or 5
other required position in which it is necessary to provide for the escape of air or the
like.
In order that my invention may be fully understood I will now refer to the
drawings filed with my provisional specification in which
Figure 1. is a sectional side elevation.
Figure 2. elevation.
1
Figure 3. plan view of bottom of cylinder.
Figure 4. plan view of cross head in figure 1.
Figure 5. plan view of adjusting nut or screw.
A spindle
C is a cylinder having the inlet aperture A and outlet aperture J.
F is a brass disc which carries the
passing through the valve carries the float D.
surface G which may be of suitable material such as leather or india-rubber being
A spring bears upon a
secured in position by means of the washer H and a nut.
disc or washer carried upon the spindle and also upon the nut or washer L which
screws in the cross-head K so that the tension of the spring, may be regulated,
M being a cotter passing through the spindle. The aperture in the plate I is closed
by the disc G owing to the buoyancy of the float I so long as there is sufficient water
or fluid in the cylinder C this cylinder being placed in such a position that air or gas
which would otherwise collect in the pump will rise or enter the cylinder C and owing
to the displacement of the water or fluid from the cylinder C the float D will fall and
thus allow the air or gas to escape through the outlet J when the water or fluid will
again enter the cylinder C and cause the float D to rise thus closing the aperture.
In the case of a ship in a heavy sea the inlet to a pumping engine may be uncovered
by the water, and air will then enter the pump which interferes with the working of
the pump, and in the case of pumps used for condensors this is a very serious
objection as owing to the want of circulation the condensors become heated. By
placing a valve constructed according to my invention upon the pump in such a
position as to allow of the escape of air this objection is obviated, as the valve wil
perimit of the escape of air as required thus maintaining the pumps full of water.
Having now particularly described and ascertained the nature of my said Inven
tion, and in what manner the same is to be performed, I declare that what
claim is :-
1. The combined construction and arrangement of the various parts substantiall
as described and illustrated herein.
2. An escape valve consisting of a spindle controlled by a spring and carrying
float and a valve disc, said valve disc closing or opening an aperture in a chamber
casing in which said spindle is carried, an adjustable spring which controls th
movement of the spindle aforesaid, said chamber or casing having an inlet and outle
and being placed upon a suitable part of a pump cylinder or other required positio
so as to allow of the escape of air or gas as required.
day of February 1897.
T TATON