Improvements in Stop Valves.
Year: 1893

page_text: Date of Application, 26th Apr., 1893
Complete Specification Left, 21st Dec., 1893-Accepted, 27th Jan., 1894
Improvements in Stop Valves.
We, ARTHUR DAWSON, of 119 Manchester Road, Rochdale, Commercial
Traveller, and FRED WHITTAKER THOMAS, of 5 South View, Bamford, near
Rochdale, Engineer, both in the County of Lancaster, do hereby declare the nature
of this invention to be as follows:-
Our invention relates to stop valves and is intended to dispense with the usual
screw down motion in such valves and to provide a more effective full way passage
than is possible with ordinary screw down valves.
Our invention consists in a rotating plate valve so arranged that steam or other
pressure forces the plate against a seat and holds it there and an aperture or
apertures in the seat and plate of the valve is or are brought opposite each other by
the rotation of the said plate.
In one method of carrying the invention into effect, we arrange a gun metal
stop valve case with a flat circular face having an aperture or apertures in the said
face; a circular valve is placed upon this face, the case being provided with a
screwed or bolted cover which is large enough to admit the valve and carry the
valve spindle. The valve spindle passes through a suitable stuffing gland in the
said cover and one end passes into a square socket in the plate valve while the other
end is supplied with any usual wheel or handle. By rotating the spindle we are
enabled to rotate the valve and so open or close the port or passage.
According to one arrangement we prefer to screw the spindle so that a slight
up and down movement will be given while closing or opening the valve, and also
to take the thrust of a spring pressing between a collar on the said spindle and the
valve.
It is to be distinctly understood that the purpose of this spindle is to limit the
range of rotation, but it is not intended to make the valve pressure tight by
pinching it, but is provided to keep the valve tight against back pressure.
The spring may or may not be used without departing from the essential features
of our invention.
Dated this 25th day of April 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Stop Valves.
We, Arthur DAWSON, of 119 Manchester Road, Rochdale, Commercial
Traveller, and FRED WHITTAKER THOMAS, of 5 South View, Bamford, near
Rochdale, Engineer, both in the County of Lancaster, 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 :-
Our invention relates to stop valves and is intended to dispense with the usual
screw down motion in such valves and to provide a more effective full way passage
than is possible with ordinary screw down valves. One invention consists in a
rotating plate valve so arranged that steam or other pressure forces the plate
against a seat and holds it there and an aperture or apertures in the seat and
IDU17

page_text: plate of the valve is or are brought opposite each other by the rotation of the
said plate.
Referring to the accompanying sheet of drawings
Figure 1 is a sectional view of a valve constructed in accordance with our
invention.
Figure 2 is a plan showing the valve seat, the valve and cap being removed.
Figure 3 is an external elevation of our valve while
Figure 4 is an external plan.
Figure 5 is an elevation and plan of the spindle.
Figures 6 and 7 are respectively plan and clevation of the valve plate.
Figure 8 is an elevation of a spring.
In one method of carrying the invention into effect, we arrange a gun metal
stop valve case B₁ with a flat circular face B having an aperture C or apertures
in the said face B; a circular valve A is placed upon this face, the case being
provided with a screwed or bolted cover E which is large enough to admit the
valve A and carry the valve spindle D. The valve spindle D passes through a
suitable stuffing gland in the said cover and one end D³ passes into a square socket
in the plate valve A while the other end is supplied with any usual wheel or
handle. By rotating the spindle D we are enabled to rotate the valve A and so
open or close the port or passage.
A is the port or passage in the plate valve A.
According to one arrangement we prefer to screw the spindle as shown at D
so that a slight up and down movement will be given while closing or opening
the valve, and also to take the thrust of a spring as D2 pressing between a collar
on the said spindle and the valve A.
It is to be distinctly understood that the purpose of this screwed spindle is to
limit the range of rotation but it is not intended to make the valve pressure
tight by pinching it, but is provided to keep the valve tight against back pressure.
The spring D may or may not be used without departing from the essential
features of our invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A stop valve in which the fluid is controlled by a rotating plate valve having
a passage or port in it, the said plate valve working on a flat circular face also
having a port, the action and operation being substantially as hereinbefore
described.
2. The special arrangement and construction of stop valve hereinbefore described
and illustrated in the accompanying drawings.
Dated this 21st day of December 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.