Improvements in Valves.
Year: 1896

page_text: Date of Application, 24th Feb., 1896-Accepted, 28th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in Valves.
I, ALBERT MÜLLER, Engineer, of 34 Friedenstrasse, Berlin, Germany, 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 :-
The present invention relates to that class of valve which is used in connection
with receptacles for the transport of gases under pressure and its object is to
prevent the loosening of such valves, due to vibration whilst being exported, and
the consequent escape of the gas. In valves of this kind hitherto employed, the
valve proper has generally been carried by a screw spindle, which serves to open
and close the valve, and since the construction of the valve casing does not as a
rule allow of the employment of a very thick or stout spindle, the screw thread of
the same is necessarily somewhat wide pitched so that the spindle is liable to turn
in its sleeve owing to the vibration caused by transport and the valve consequently
loosens causing the escape of the gas.
According to the present invention this disadvantage is obviated by the entire
omission of a screwed spindle, and by using a hand wheel for operating the valve
adapted to press directly on the valve.
And in order to render the present Specification more easily intelligible reference
is made to the accompanying drawing in which similar letters of reference denote
similar parts throughout the several views:-
Fig. 1 being a vertical section through the valve, shewing the same open, and
Fig. 2 a similar section shewing the valve closed.
Fig. 3 is a modified form of the invention.
The hand wheel g is cupshaped and provided with an interior screw thread which
fits an exterior thread on the top of the valve casing. From the top of the
cupshaped wheel is a downwardly extending projections, which on screwing down
the wheel g presses on the upper part a' of the valve spindle a and closes the valve.
In order to render the loosening of the hand wheel which is very unlikely owing to
the short pitch and large diameter of the screw thread and almost impossible,
a lug m is provided at the lower edge of the cup having therein a set screw r (Fig. 3)
engaging with its conical end in an annular groove o of the valve casing. The
groove is so formed that one slanting side of the screw end will always lie against
the slanting side of the said groove and thus allow a certain amount of play for
any variations in the height of the parts inside the casing, when screwing down the
wheel. By this arrangement of the contact between the conical side of the set
screw with the corresponding side of the groove o, the wheel can be retained
without its being necessary to screw the set screw up tight enough to penetrate
the metal of the valve casing.
In many valves having screw spindles, the disadvantage has been noticed that on
opening the valve, owing partly to oxidation and the presence of impurities the
bushing unscrews with the valve spindle allowing the escape of gas. This
disadvantage is avoided by not using a screwed spindle.
In the modification shewn in Fig. 3 the valve spindle is attached to the cover or
hand wheel g being prolonged upwardly and passed through the cup and secured
by means of a nut t.
Thus by means of the present invention a valve is produced in which the escape

page_text: of gas during transport is entirely avoided, and a loosening of the bush h also
effectually prevented.
Instead of providing the band wheel with interior thread the same may have an
exterior thread and be screwed into the top of the valve casing A which is in that
case provided with an interior thread. Instead of the hand wheel a nut may be
employed formed to correspond and the valve may be opened and closed with the
aid of a spanner.
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 :-
1. In a valve for use in connection with gases under pressure, the arrangement
of the hand wheel g having interior or exterior thread to fit a corresponding thread
on the top of the valve casing said wheel being adapted to press on and actuate
direct the spindle of the valve substantially as described.
2. In combination with the valve covered by Claim 1, a lug m arranged at the
lower end of the cup and having set screw m with conical end, and an annular
groove o around the valve casing said groove being formed to make contact with
the conical surface of the set screw end in the manner and for the purpose
substantially as described.
3. In combination with the valve claimed, the arrangement of the valve spindle
in such manner that the same is prolonged through the hand wheel and secured
thereto at its upper end by a nut or its equivalent substantially as described.
4. In a valve for use in connection with gases under pressure the arrangement of
a nut in place of the hand wheel above claimed, said nut being operated by means
of a spanner substantially as described.
Dated this 24th day of February 1896.
AMBROSE MYALL,
2 Lancaster Place, London, W.C., Agent for the Applicant.