Improvements in Sluice Valves
Year: 1897

page_text: I, JAMES GARVIE, of The Southgate Engineering Company Limited, New Southgate,
in the County of Middlesex, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to sluice valves of the kind or class having a pair of parallel
discs arranged to slide between parallel valve seats to open and close the
thoroughfare.
According to this invention, the valve discs are mounted loosely upon opposite
sides of a circular plate through which the valve spindle is passed, the axis of the
spindle being coincident with a diameter of the said plate. The said valve discs are
capable of rotation on their supporting plate which is constructed with a flange or
rim at each side there of to receive the discs. Each disc is fitted with a detachable
ring preferably of gun inetal forming the valve face. The attachınent of the rings
to the discs may be conveniently effected by screws but in addition to the screws an
annular rib formed on the disc engages with an annular groove in the ring
or a rib on the ring engages with a groove in the disc but without fitting
tightly therein so that the differential expansion and contraction of the disc and ring
by reason of variation of temperature may proceed without straining the metal or
warping the disc or ring. A similar detachable ring is applied in a similar manner
to the valve casing around the inlet and outlet thoroughfares to formn the valve seats.
The valve discs are maintained pressed against their seats by disc or other suitable
springs placed between the valve discs and their supporting plate.
"Improvements in Sluice Valves."
I, JAMES GARVIE, of the Southgate Engineering Company Ltd., New Southgate, in
the County of Middlesex, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in sluice valves of the kind or class in
which a pair of parallel discs are arranged to slide between parallel valve seats to open
and close the passage or thoroughfare through the valve.
According to the said invention the valve discs are arranged upon opposite sides of

page_text: a circular plate through which the valve spindle is passed.
The said discs are
capable of circular movement on the plate to allow them to bed themselves properly
on the valve seats and are pressed outwardly from the said plate against their seats,
by suitable springs interposed between the valve discs and the circular plate.
In order that the invention may be clearly understood and readily carried into
effect I will proceed to describe the same by aid of the accompanying drawings which
are views at right angles to each other and in which :-
Figure 1 is a section, and
Figure 2 a compound view, the left hand portion being an elevation and the right
hand portion a part elevation and a part central section.
A is the valve body or casing which contains the valve chamber A¹ and the steam
passage or thoroughfore A².
a a are the valve discs which may advantageously be forined of brass, and b is the
circular plate on which the discs a are mounted by means of their flanges a¹ these
latter being of slightly larger diameter than the plates to allow for expansion and
contraction. It will thus be seen that while the discs are compelled to move up and
down with the plate b they are not rigidly connected therewith but are free to turn or
move angularly around their own centres and also to adjust themselves laterally on
the said plate.
c is the valve spindle which works in a stuffing box d and is connected with the
plate 6 by a screw bolt c¹ passing diametrically through the same. The spindle is
operated by a hand-wheel c² and screw c³, which latter works in a cross bar e carried by
uprights e', and engages with a female thread in the upper end of the spindle c.
cavity is formed inside the spindle to accomodate the end of the screw when the
spindle is drawn upward to open the valve.
A
ff are guides formed in the valve casing A, which serve to control the up and
down movements of the plates b.
gg are the valve seats which consist of rings of brass or other suitable material
having flanges gl and grooves g². They are secured in place by screws g³ passing
through their flanges, and annular ribs or projections A4 formed on the valve
casing.
.
hh are the springs by which the valve discs a are pressed sideways away from the
plate band against their seats, these springs being interposed between the discs and
the said plate b, and being of any suitable kind, for instance disc springs.
It will be seen that in the example shown in the drawings, the valve casing A is
formed in three parts or sections secured together by bolts Ax the upper portion
containing the stuffing box d forming one section while the lower portion in which
the steam passage or thoroughfare A2 is situated, is divided vertically and forms the
two other sections.
This construction permits the machining of the various parts which require such
treatment to be readily effected.
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 I
claim is.
1. A sluice valve having valve discs arranged on opposite sides of a circular plate to
which the valve spindle is connected and on which the discs are capable of circular
movement, substantially as specified.
2. A sluice valve constructed and operating substantially as herein before described
with reference to the accompanying drawings.
HASELTINE LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.