IMPROVEMENTS IN THE CONSTRUCTION OF SLUICE OR STOP VALVES
Year: 1884

page_text: I GEORGE KNOTT of Dukinfield in the County of Chester Bookkeeper do hereby
declare the nature of my invention for IMPROVEMENTS IN THE CONSTRUCTION OF
SLUICE OR STOP VALVES to be as follows:—
My invention relates to that class of sluice valves or stop valves which have a
clear thoroughfare, opened or closed by a vertical slide working against and between
two parallel faces, the principal object of the invention being to keep both sides of
the valve bearing with uniform pressure against their respective facings, without the
use of springs or wedges.
The face of the valve next to the outlet I make of a disc of metal with a slightly
raised flange ground or formed to a true surface.
The opposite or inlet side of the valve I make of a corrugated flexible metal
disc formed with concentric corrugations so as to form an elastic valve bearing, with
both its outlet and inlet surfaces against the respective facings or seats. The
uniform pressure thus created being sufficient to keep the valve, perfectly tight, at
the same time that owing to the flexibility of the corrugated disc, the valve is
allowed to move freely up and down between its facings or seats.
The second part of the invention relates to the construction of the mechanism for
giving the sliding motion to the said valve, the object being to simplify the same
and to dispense with the packing.
The upper part of the body of the valve between the discs is formed with a
female screw or nut working upon a fixed screwed spindle, detached from the valve
so that as the screwed spindle is turned round, the valve is moved up or down on
the outside of the said screwed spindle.
The upper end of the screwed spindle is squared and fits into a square recess in
the lower end of an upper detached spindle or "box key," which is made with a
conical shoulder working against a conical seat in the cap of the valve box, through
which latter the upper end of the upper detached spindle or box key passes out and
is provided with a cross handle or other means of turning the same.
This arrangement dispenses with all necessity for packing or stuffing box, as the
conical surfaces make a close joint.
TR
300

page_text: I GEORGE KNOTT of Dukinfield in the County of Chester Bookkeeper do hereby
declare the nature of my invention for IMPROVEMENTS IN THE CONSTRUCTION OF
SLUICE OR STOP VALVES and in what mauner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My invention relates to that class of sluice valves or stop valves which have a
clear thoroughfare, opened or closed by a vertical slide working against and between
two parallel faces, the principal object of the invention being to keep both sides of
the valve bearing with uniform pressure against their respective facings without the
use of springs or wedges.
Such being the nature and object of my said invention I will now proceed to
describe in detail the manner in which the same is to be or may be performed, and
in order that the same may be clearly understood I have annexed hereunto a
sectional drawing illustrative thereof and have marked the same with letters of
reference corresponding with those in the following explanation thereof.
a, a is the valve box, b, b the valve box cover and c, c the valve box cap. d, d is
the valve.
The face d of the valve next to the outlet I make of a disc of metal with a
slightly raised flange ground or formed to a true flat surface. The opposite or inlet
side of the valve I make of a corrugated flexible metal disc du formed with
concentric corrugations so that the whole d, dď d¹¹ forms an elastic valve, bearing
with both its outlet and inlet surfaces against the respective facings or scats e, e.
The uniform pressure thus created being sufficient to keep the valve perfectly tight,
at the same time that owing to the flexibility of the corrugated disc'd", the valvo
is allowed to move freely up and down between its facings or seats e, e.
The second part of the invention relates to the construction of the mechanism
for giving the sliding motion to the said valve, the object being to simplify the
same and to dispense with packing.
The upper part d, d of the body of the valve between the discs d³, d¹¹ is formed
or fitted with a female screw or nut f,f working upon a fixed screwed spindle g I
which is otherwise detached from the valve d, d so that as the screwed spindle g, g
is turned round, the valve d, d is moved up or down on the outside of the said
screwed spindle.
The upper end g*, of the screwed spindle is squared and fits into a square recess
or socket in the lower end of an upper detached spindle or "box key" h, h which
is made with a conical shoulder i, i working against a conical seat k, k in the
cap c, c of the valve box, through which latter the upper end of the upper detached
spindle or box key h, h passes out and is provided with a cross handle or other
means of turning the same.
This arrangement dispenses with all necessity for packing or stuffing box as the
is
conical surfaces i, i and k, k make a close joint, and as the screwed spindle g, g
entirely detached from the upper spindle or box key h, h the resistance of the
valve d, d to the action of the screwed spindle g, g will have no tendency to separate
the two surfaces i, i and k, k and thus to cause the valve to leak.
It will be evident that this same principle of a detached upper spindle or box
key with a conical shoulder is equally applicable to other known forms of sluice or
stop valves fitted with a screwed spindle whether the said screwed spindle or its
nut is attached to the valve.

page_text: 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 as follows:-
First In sluice or stop valves opened or closed by a vertical slide working
against and between two parallel faces. I claim as my invention forming one side
(or each side) of the said valve or slide of a flexible metal disc having concentric
corrugations.
Secondly-In sluice or stop valves fitted with a screwed spindle for opening and
closing the slide I claim as my invention the combination with the said screwed
spindle of an upper detached spindle or box key which is made with a conical
shoulder working against a conical seat in the cap of the valve box through which
latter the upper end of the said detached spindle or box key passes out and is
provided with a cross handle or other means for turning the same, so as to dispenso
with a stuffing box or other similar packing all substantially as herein before
particularly described and illustrated by the annexed drawing.
GEORGE DAVIES,
Agent for the Applicant,
4, St. Ann's Square, Manchester.