Improvements in Valves for Regulating the Flow of Gases under Pressure.
Year: 1887

page_text: Date of Application, 30th Sept., 1887
Complete Specification Left, 28th June, 1888
Complete Specification Accepted, 24th Aug., 1888
PROVISIONAL SPECIFICATION.
Improvements in Valves for Regulating the Flow of Gases
under Pressure.
I ALEXANDER THOMAS CLARKSON of 28 Bartlett's Buildings in the City of London,
Scientific Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates more particularly to valves for regulating the flow of the
gases employed in the production of the oxyhydrogen light, and which are now
generally used in a compressed state, but the valves may also be employed for
regulating the flow of other compressed gases for various purposes.
In carrying out my invention I employ a small gas bag or bellows of any suitable
construction, and provided with suitable inlet and outlet openings.
The inlet opening is connected with a casting of convenient shape, in which is
formed a passage from the compressed gas reservoir, and a threaded socket to receive
the screw of a conical screw down valve. The seating of this valve is formed by
preference at the inner end of the passage from the receiver.
The valve spindle, at its outer end, is connected with a spring, the tendency of
which will be to keep the valve open, and upon the spindle is mounted an arm which
rests on the top of the gas bag or bellows. The valve being open, gas is admitted to
ibis bellows, and if the outlet be closed, the top of the bellows will rise, and, by means
of the arm bearing upon it, close the valve. When the outlet is opened, the bellows
will collapse under the influence of the spring on the spindle acting on the arm, and
the valve will be opened to let in a further supply of the gas.
By employing a screw down valve, I effectually prevent leakage of the gas, which
has been a cause of failure in other apparatus of similar character in which ordinary
taps or cocks have been used.
nu
1007
NEWTON & SON,
Agents for the Applicant.

page_text: t
Improvements in Valves for Regulating the Flow of Gases
under Pressure.
I ALEXANDER THOMAS CLARKSON of 28 Bartletts Buildings in the City of London
Scientific Instrument Maker, 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 :-
This invention relates more particularly to valves for regulating the flow of the
gases employed in the production of the oxyhydrogen light and which are now
generally used in a compressed state but the valves may also be employed for
regulating the flow of other compressed gases for various purposes.
The accompanying drawings show the method of carrying out my
Fig. I showes a plan of the valve.
Fig. II end elevation.
Fig. III sectional elevation through line 3-4 Fig. II.
Fig. IV sectional plan through the line 1-2 Fig. I.
invention.
In Fig. II B is a wedge shaped Bag Bellows or expanding chamber composed
preferably of Indiarubber in combination with canvas sheeting to prevent linear
expansion when under strain.
Contained within the said chamber are two rectangular plates of metal band b₁
Fig. IV that are held in position by the shape given to the bag. The plate bis
thickened at b₂ for the purpose of attaching an outlet tube O and also to provide an
inlet both of which pierce the bag at the points C and C, respectively.
D is a casting secured to B3 by passing the attached tube O through a hole t Fig. III
and is fixed by screwing up the loose nut n Fig. IV p is a hollow projection coincident
with and fitting the inlet C, and passing through the plate 6 into the interior of the
bag and in addition to the means of communication it serves as a steadying pin.
Commencing at Pas passage is formed in the casting D Fig. III P1 P2 P3-
At P a suitable union is provided for attaching it to the source of supply.
Continued axially with the portion pa P₂ a screw lined passage is shown containing a
conically tipped rod SS screwed for a part of its length from the point. At the point
where SS emerges the passage is enlarged to form a gland or stuffing box the packing
being held in position by the disc which is adjusted by the screws passing through
it and screwing into the face of D.
At about the middle of SS is attached the inner end of a spiral spring 7 such as
are employed for driving clocks. To contain rr and hold its outer end a socket
piece G is provided and firmly fixed on 1 by screwing being attached to the inner
surface of G. Upon the outer end of SS a hole is drilled in which is inserted an
arm m bent as shown Fig. 1 having a cross bar attached and arranged to slide upon a
plate fixed to the upper part of the bag B.
The action of the valve is as follows The spring r is arranged to turn SS so as
to withdraw its conical point from the mouth of the passage at p, and also to compress
the bellows B by means of the arm m.

page_text: On connecting pa with a source of supply the gas will pass through the open passage
into the chamber B and if the outlet be closed will raise it and by means of the arm m
turn SS in opposition to the spring rr.
The result of this movement will be to advance the conical point of S S towards
checking and ultimately stopping the flow of gas.
P2
On partly opening the outlet the confined gas will be forced out by the action of the
spring and simultaneously the passage at p₂ will commence to open and continue until
the flow is increased sufficiently to accumulate pressure in B that will exactly neutralizo
the tension of the spring.
When this condition is satisfied the pressure of the gas within B will be governed
by the tension given to the spring for any increase would overpower it and reduce
the supply to B. Whereas any decrease would give the spring preponderance and
increase the supply.
The effect produced by this action and reaction will be to maintain a constant
pressure upon the supply obtainable at the outlet independent of variations of pressure
upon the inlet providing the supply is sufficient to maintain the pressure within B.
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
I. The combination of a spring with a conically tipped screw and expanding
chamber substantially as herein set forth.
II. The mode of construction of the expanding chamber and the adaptation of the
various parts substantially as herein set forth.
Dated this Twenty eighth day of June 1888.
ALEXANDER THOMAS CLARKSON.