Improvements in Valves.
Year: 1893

page_text: Date of Application, 20th Mar., 1893
Complete Specification Left, 20th Dec., 1893-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Valves.
We THOMAS BARKER and SAMUEL SNAPE of the Firm of Barker Snape
& Wilson Engineers Bolton Brass Works, Bark Street, Bolton in the County of
Lancaster and JOHN RAMSEY of 9 Gapp Road Haydens Park Wimbledon in the
County of Surrey Engineer do hereby declare the nature of this invention to be as
follows:-
Our invention relates to what is known as mushroom valves. We propose to
put the inlet and outlet in a line with each other or similar to a straight pipe, and
place or fix the mushroom valve and seating at about an angle of 45 degrees to the
inlet and outlet, and in such a manner as to give when the valve is open a perfect
through way equal to a plain pipe without any obstruction whatever. We also
propose to attach or form a relief chamber in or on the mushroon valve, with
suitable appliances at the end of the valve spindle for the purpose of relieving the
pressure on the valve when the same is being opened. We also propose to make
the inlet in such a manner that the pressure will be on the top side of the valve
similar to a check or back pressure valve, so that the full pressure coming in
at the inlet will assist the screw or valve spindle in keeping the valve closed.
the ordinary way the screw has to screw against the pressure.
In
We also propose to apply the relief chamber and appliances on the end of the
spindle to valves where the inlet and outlet are placed at various angles to each
other.
Dated this 16th day of March 1893.
THOMAS BARKER.
SAMUEL SNAPE.
JOHN RAMSEY.
COMPLETE SPECIFICATION.
Improvements in Valves.
We THOMAS BARKER and SAMUEL SNAPE of the Firm of Barker Snape
& Wilson Engineers Bolton Brass Works Bark Street Bolton in the County of
Lancaster and JOHN RAMSEY of 9 (app Road Haydens Park Wimbledon in the
County of Surrey, Engineer do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
uscertained in and by the following statement:-
-
Our invention relates to what is known as mushroom valves and in order to more
clearly describe the same we shall now refer to the accompanying drawings:-
Fig. 1 is orthod of applying noom valves to give a thonghway
when the valve is open and also shews our method of forming a relief chamber to
relieve the pressure when the valve is being opened.
11324
Figs. 2 and 3 are other methods of applying our invention.
a Fig. 1 is the body of valve with one side cut away a 1 and is part of the body
enlarged to allow us to make use of a much larger valve 61 and seating than is
usually required for size of passage a 2. 1 is the mushroom valve on spindle
which is placed at an angle of about 45 degrees to passage a 2.
t
The valve 1 is at liberty to move about slightly on spindle e in space as shewn
at 63. el is a screwed part cast or fixed on spindle and chased or threaded to

page_text: screw in part of body /. e3 is a nut locked on end of spindle e to keep valve 61 in
position. is the relief chamber which is drilled near the centre of spindle e with
inlet d 1.
When the valve 1 is screwed on seating to close the valve the loose space
between 2 and 3 is taken up and will be in position as shewn at 63. The upper
part of valve is pressed against spindle at 1 thus forming a steam tight joint.
In opening the pressure being at the top of the valve a slight turn of spindle.
transfers space at 63 to 62 and this opens passage d 1 and allows the pressure to
pass along chamber d to the underside of valve 1 this will relieve the pressure on
top side of valve 1 and allow same to be opened easily. It will be readily seen
that when the valve 1 is fully opened it will allow a perfectly clear passage equal
to a pipe without any obstruction whatever.
"
Fig. 2 is similar in action to Fig. I as regards the valve but the spindle has
collar el and square part 2 which slides in square part 1 cast or cut out of
bush. When spindle e is revolved by the action of the square e it carries along
with it the bush which opens or closes the valve.
end on
Fig. 3 is a sectional view of valve and valve chambers the seating being as
before but in this case we have grooves or slots d d 1 and d№ 2 on outer surface of
spindle which are varied in numbers according to size of valve and in place of
nut 3 on Figs. 1 and 2 we place nut 3 on top side of valve and form a mushroom
spindle with a circular bottom on valve 1 with a small outlet 63 from
chamber 2. is a spring for the purpose of checking vibration when the valve
is nearly closed. When the valve 1'is closed down the spindle closes up the
chamber 62 and outlet 63. In opening with the pressure on top of valve the relief
valve is opened as shewn at 2, before valve 1 leaves the seating. The pressure
makes its escape through the passages or slots dd 1 and 2 into chambers 2
and out through 3 this relieving the strain on large valve 1 before same is
opened.
Fig. 4 are construction lines shewing our method of ascertaining the diameter at
any angle of valve and valve seating so as to leave no obstruction in the passages
to is internal diameter of pipe. construction line for valve seating.
ef and inner edge of valve seating.
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 :-
1st. An angular valve constructed so that the inner edge of the seating is not
less than the distance d to big. 4.
2nd. An angular valve with relief chambers substantially as illustrated and
described.
3rd. A mushroom valve made from a combination of all or any of Figs. 1. 2. 3
and substantially as described.
Dated this 19th day of December 1893.
SAMUEL SNAPE.
THOMAS BARKER.
J. RAMSEY.