Improvements in and Connected with Valves for Hydraulic and other Purposes, Especially Applicable to Hydrants.
Year: 1885

page_text: Improvements in and Connected with Valves for Hydraulic and
other Purposes, Especially Applicable to Hydrants.
I JOHN BAKER of the Goldstone Bottom Pumping Station; Brighton in the
County of Sussex, Resident Engineer do hereby declare the nature of said invention
for "IMPROVEMENTS IN AND CONNECTED WITH VALVES FOR HYDRAULIC AND OTHER
PURPOSES ESPECIALLY APPLICABLE TO HYDRANTS and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:―
"
The objects of this invention are to improve and simplify the construction of
hydrants and other valves and to facilitate the repair of same so that an unskilled
man may readily perform it..
By this invention I improve the construction of the valve spindle, of the nut
therefor, and of the seat. When the valve spindle as is frequently the case for
instance with hydrants and sluice valves is made of gun metal I provide the square
end thereof with a cap of malleable cast iron onto which the box spanner or
turncocks key is fitted. This cap is fixed by a screw passing through the end of
the cap and into the end of the spindle. It is also applicable for wrought iron
spindles as the diameter of the spindle may also in this case be reduced while a
good sized square is obtained for the spanner or key to take hold of, and the harder
imalleable cast iron resists the wear better than wrought iron or gun metal.
Instead of a square I may of course use hexagon or other polygonal form for the
end of spindle and for the cap.
The nut is made with a circular flange which rests in a recess turned into the
flange of the body or casting of the valve or partly in that and partly in the cap
or cover. In the latter are formed two notches or recesses for receiving two
corresponding lugs or tongues on the nut for the purpose of keeping it from turning;
these lugs also strengthen the nut. The valve seat I make in two parts, the lower
part being fixed in the body or casting of the valve in the usual manner and formed
with an upstanding part or rim screwed externally. Onto this screwed rim I screw
the upper part or seating proper which is formed with a lug on one or two sides
for a spanner to take hold of it for screwing it on and off as required in case of
repair or replacing. The seat being raised also prevents lodgment of grit, stones
or dirt thereon and preserves the leather or other facing of the valve itself.

page_text: In order that this invention may be more fully understood I will now describe
it as applied to a hydrant-Figure being a side elevation, Figure 2 a sectional
side elevation, Figure 3 a plan section on line A A Figure 2, and Figure 4 a plan
section on line B B Fig. 2.
The screwed valve spindle A is shown connected in the ordinary manner to the
valve B having a leather facing C. The taper square upper end of spindle is fitted
with a malleable cast iron cap D which is held by the screw E. By this means
I obtain a good wear resisting square for the key or spanner while the diameter of
the spindle may be kept small which is of special value from an economical point of
view when it is made of gun metal. The nut F is made with a circular flange
which as here shown is let partly into the top flange of the body or casting G and
partly into the underside of the cover H. The latter is cast with two through
notches for the tongues F1 on the nut for keeping it from turning round and at the
same time strengthening the nut. The valve seat is made in two parts the lower
one I being fixed in the body G in the usual manner but formed with an upper
continuation I screwed outside onto which is screwed the seat proper K. This
latter has two lugs K¹ for taking hold of it with a key for screwing it on or off as
required for repairing or replacing. As the seat projects above the lower interior
part of the body G especially if the latter is made with a recess at G¹ no dirt or
other sediment will lodge on the top of the valve seat but will collect at G¹
wherefrom it can be easily removed.
In order to remove for repair say the seat K the labourer first takes off the
cover H with valve spindle nut and valve. He then by means of a suitable spanner
unscrews the seat K and closes the inlet aperture with a cap screwed internally to
fit the screwed part I¹ and provided with a stem for taking hold of it; this stem is
screwed at its upper end and passes through a bow bracket the two legs or
shanks of which take onto the flange G². A nut on this stem serves to draw the
bow bracket up and at the same time to force the cap tightly against the top of the
lower seat.
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
First. The malleable cast iron cap D for the "square" of valve spindles for the
purposes set forth.
Second. The nut F for the spindles of valves.
Third. The removable valve seat or part K.
Fourth. The improved construction of hydrant substantially as described and
shown having the spindle cap D, nut F and part K.
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