An Improved Valve applicable to Vessels Containing Compressed Gas, Gases, or Gaseous Liquids.
Year: 1899

page_text: COMPLETE SPECIFICATION.
An Improved Valve applicable to Vessels Containing Compressed Gas,
Gases, or Gaseous Liquids.
I, GUSTAVO DONAT, of 3 and 4, Australian Avenue, in the City of London,
Warehouseman, 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:-
My invention consists in an improved valve applicable to vessels containing
compressed gas, mixed gases, gaseous liquids, and the like; the object I have
more particularly in view being such simplification and adjustment of the inter-
acting parts as that while the wear and tear is reduced to a minimum, the effort
required to open the valve, even against very high pressure is diminished, and
since the valve spindle is practically relieved of all lateral stress, the face of the
valve is always in alignment or true with its seat, which cannot wear unequally,
leakage being thereby avoided.
The construction and operation of my invention will be readily understood by
reference to the drawing, in which-
Fig. 1 is a sectional view of the valve.
Fig. 2 is an end view shewing foot lever.
Fig. 3 shews the relative position of cam and driving spindle when in ordinary
use.
Fig. shews the position of same when charging.
In the drawing 1 is the frame or body; this may be conveniently cast in gun-
metal, brass, or any like suitable metal, the interior being cored out conveniently
for tooling, and fitted with a cover 2 secured by set or grub screws 3. The neck 3
at the reverse end of the body is drilled as at 4 with a small hole and screwed
externally as at 5, so as to fit the corresponding recess in the gas bottle or the
like 6; this hole is widened out as at 7, part being recessed or shaped as at 8 for the
reception of the rubber packing ring 9, which is passed in endwise, its resiliency
enabling it to adapt itself to the recessed seat 8. The boss 3b is drilled as at 4,
and screwed externally as at 5, to fit the union or other device by which
connection is made to the gas bag or equivalent; the lower part of the
body may also conveniently be drilled and tapped as at 5ª, and thereby
fastened to any suitable frame or support. The valve 10 I prefer to form of
German silver, but it may be made of any other suitable metal. It is carefully
turned to the shape shewn, and fitted to the hole 7, the shoulder 11 is slightly
undercut so as to firmly grip and force the packing ring 9 against its seat; the
outer end of the valve spindle which acts as a guide is slotted as at 12, drilled,
and secured by a pin 13, to the link 14 which is pivoted at 15 to the cam 16; this
cam is keyed by a pin 161 to a stout arbor or spindle 17 journaled as shewn at 18
in the side walls of the body. The lower end or tail of the cam is forked as at 19
and secured by a pin 15' to a metallic plunger 20, encircled by a stout spring 21;
the tail of the plunger being stepped into the guiding hole 22. A spindle 23
formed with a flat side 24 buts against the fork of cam, and is journaled in the

page_text: side walls of body, as shewn in Fig. 2, and prevented from shifting laterally by
the set screw 31, which engages with a groove 25 formed therein. On the end
of this spindle is formed a square 26, and to this is fitted a lever 27 which may take
any desired shape. When, however, the valve is mounted upon a bottle contain-
ing gas such as nitrous oxide or its equivalent employed as an anesthetic, I prefer
to use the bent form of lever shown; this is then fitted with a roller 28, turning
upon the pin 29 screwed into the end of lever 27. By placing the foot upon the
roller the operator can more easily control the supply of gas.
The operation of my invention is as follows
When
It will be observed that the side of the spindle next the tail or lower end of the
cam is cut away so as to have a nearly flat face, the edges being rounded.
the foot lever 27 or its equivalent mounted upon the spindle 23 is depressed the
tail of the cam is forced inwards against the pressure of the spring, the spindle
assuming the position shewn in Fig. 3; the effect of this through the link 14 is
to pull the valve off its seat and permit the gas, gases, or gaseous liquids to pass
into the bag or equivalent replacing it. Owing however to the particular position
of, the pin 15 with regard to the spindle 17 on which the cam is mounted, the
direction of motion of the link 14, see dotted lines Fig. 1, approximates very
closely to a straight line, thus preventing all lateral strain upon the combined
valve and spindle 10, and ensuring axial alignment with its seat.
When charging the cylinder the spindle 23 is rotated so as to cause its rounded
face to abut against the tail of the link as see Fig. 4 and hold the valve open.
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. In a valve for use with vessels or the like containing compressed gas, gases,
gaseous liquids or the like, the particular combination of interacting parts herein
shewn and described, operating for the purpose specified.
2. In a valve for hermetically sealing and regulating the flow of compressed gas,
gases, gaseous liquids or the like, the particular form of cam mounted and operat-
ing as described and the link 14 connecting said cam with the valve in such
manner as that the pull upon said valve is nearly a straight line.
3. The combination in or with a valve applicable to vessels containing com-
pressed gas and the like of the particular form of packing 9 mounted in a recess
and engaging with the undercut shoulder on valve as shewn and for the purpose
specified.
4. The combination in or with a valve applicable to vessels containing com-
pressed gas, gases, or the like, of the foot lever 27, mounted and operating as shewn,
and the milled roller thereon for lessening friction.
Dated this 25th day of January 1899
FRANCIS M. ROGERS,
Agent for Applicant, 21, Finsbury Pavement, London.