Improvements in Apparatus for Mixing Gases and for Regulating or Controlling the Pressure or Flow thereof.
Year: 1888

page_text: Date of Application, 28th June, 1888
Complete Specification Left, 28th Mar., 1889-Accepted, 28th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Mixing Gases and for Regulating or
Controlling the Pressure or Flow thereof.
I, Dr. HERMANN THEODOR HILLISCHER of 12, Karnthnerstr., Vienna, in the
Empire of Austria, Dentist, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for mixing gases and comprises means for
regulating the proportions of the different gases and moans for regulating or
controlling the discharge pressure or flow of the same.
Two vessels containing the gases to be mixed communicate through pipes with
two pressure-regulating apparatus which are connected by means of pipes with an
apparatus for regulating the proportions of the gases. A discharge pipe for the
mixture of the gases is connected with this apparatus.
One of the said pressure-regulating apparatus is so arranged that when the boll
of its gas-holder rises, a weight is immersed proportionately deeper into a liquid
so that the total of the buoyancies of the bell and weight, and therefore the pressure
of gas in the bell, is constant, inasmuch as the weight of the latter and the
aforesaid weight act in opposition to a counter-weight connected with the bell.
In a modification of this pressure-regulating apparatus the said weight is adapted
to descend or rise simultaneously with the bell through an equal distance and acts
with the counterweight in opposition to the weight of the bell, with the same result
as in the first arrangement.
In the second of the aforesaid pressure-regulating apparatus which is designed for
compressed gases the fluid coming from the second vessel is introduced below a
hollow piston and through an opening in the wall of the apparatus and a corresponding
opening in the wall of the piston into the interior of the latter which communicates
with the pipe leading to the apparatus for regulating the proportions of the gases.
The greater the pressure of the gas which enters the apparatus the more the piston
is raised against the pressure of a spring and the smaller becomes the free passage
through the said two openings; therefore the higher the pressure of the gas below
the piston the less gas can pass through the two openings, so that the pressure of the gus
which leaves the apparatus remains constant.
The apparatus serving to regulate the mixing of the gas comprises a casing
containing a hollow plug which is arranged at one end of the discharge pipe. By
causing the hollow plug to turn in the casing, the free passages afforded by the openings
in the plug can be changed at will so that their total remains constant but by a further
turning-movement either one or both openings can be completely closed.
The position of the said plug can be indicated by a hand upon a disc.
Dated this 28th day of June 1888
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Mixing Gases and for Regulating or
Controlling the Pressure or Flow thereof.
I, HERMANN THEODOR HILLISCHER, of 12 Karnthnerstr., Vienna, Austria, Dentist do
hereby declare the nature of this invention and in what manner the same is to
...01

page_text: be performed, to be particularly described and ascertained in and by the following
statement :-
This invention relatos to apparatus for mixing gases and comprises means for
regulating the proportions of the different gases and means for regulating or controlling
the discharge or flow of the same.
The accompanying drawings show how the said invention may be conveniently and
advantageously carried into praction.
Two vessels A' A' containing the gases to be mixed communicate through
pipes a', a² with two pressure regulating apparatus B B3 which are connected by
means of pipes with an apparatus (for regulating the proportions of the
gases.
A dischargo pipe G for the mixture of the gases is connected with this apparatas.
It is well known that the pressure of the gas in a gas holder depends upon the
greater weight of the bell over and above the counterweight of the same; now as
the weight of the bell pressing upon the gas, namely the absolute weight of the same
minus the buoyancy of the part of the bell immersed in the liquid, naturally
changes with the depth of immersion of the bell, the pressure of the gas,
special provisions were not made, would become smaller in one gas-holder the deeper
the bell is immersed in the liquid, or the smaller the quantity of gas below tho
bell.
ir
is
To meet this defect the arrangements shown in Figures 2 and 3 ure designed.
The chain or cord supporting the bell E of the gas holder is led over a pulley to
which a pinion is fastened, and carries at its other end a counterweight the said
pinion engages into a second pinion of the same diameter fastened to another pulley
to which one end of a cord or chain is secured carrying at its other end a running
weight. In Figure 2 the arrangement is such that the running weight e² rises and
descends together with the counterweight e so that when the bell E dips more deeply
into the liquid and its buoyancy thereby increased, the running weight
raised the same distance and its buoyancy thereby diminished by the same amount
as that by which the buoyancy of the bell is increased the sectional area of the running
weight being the same us that of the dipping portion of the bell. In Figure 3 the
arrangement is the same as in Figure 2 except that the running weight is placed on
the other side of its pulley, whereby the bell E and the running weight are made
to move in the same direction, so that both of them experience the same loss or
increase of buoyancy; but as in Figure 3 the running weight is on the other side of
its pulley its momentum relatively to the axis of the pulley is opposite to that in the
case of Figure 2 so that in both cases the variations of buoyancy of the hell aro
compensated by the running weights and the gas in the holder is always under the
same pressure.
In the second of the aforesaid pressure-regulating apparatus represented in detail
in Figure 4 which is designed for compressed gases the fluid coming from the second
vessel is introduced below a hollow piston and through an opening d' in the wall of
the apparatus and a corresponding opening in the wall of the piston into the interior
of the latter which communicates with the pipe lending to the apparatus for regulating
the proportion of the gases. The greater the pressure of the gas which enters the
apparatus, the more the piston d will be raised against the pressure of the spring a
und the smaller becomes the free passage through the said two openings d'; therefore
the higher the pressure of the gas below the piston the less gas can pass through
the two openings, d' and d so that the pressure of tho gas which leaves the apparatus
remains constant.
The apparatus serving to regulate the mixing of the gns is represented in vertical
and horizontal section in Figures 5 and 6 and comprises a casing containing a hollow
plug which is arranged at one end of the discharge pipe.
By causing the hollow plug which is formed integral with the pipe G to turn in
its casing (, the free passages afforded by the openings ƒ^^,^^', in 'the plug can be

page_text: changed at will so that their total remains constant; but by a further turning-move-
ment either one or both openings f," can be completely closed. The position of
the said plug can be indicated by a hand upon a disc.
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 :-
First. The improved apparatus, substantially as shown in Figure 1 and combined
in the manner herein before described, for regulating the mixing proportion and outlet
pressure of mixtures of gas.
Second. The pressure-regulating apparatus substantially as described with reference
to Figure 2.
Third. The modification of the pressure-regulating apparatus substantially as
described with reference to Figure 3.
Fourth. The pressure-regulating apparatus substantially as described with reference
to Figure 4.
Fifth. The apparatus for regulating the mixing proportions of the gasos, substan-
tially as described with reference to Figures 5 and 6.
Dated this 27th day of March 1889
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.