Improvements in Controlling Apparatus for Acetylene Generators.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Controlling Apparatus for Acetylene Generators.
I, ISIDOR SAXL, of No. 11, Darwingasse, Vienna, Austria, Professor, do hereby
declare the nature of this invention to be as follows;-
My invention relates to controlling apparatus for acetylene generators, and
consists of an apparatus controlling the supply of water to the carbide in such
a manner that such supply is automatically diminished when the pressure of
the acetylene in the acetylene receiver increases, such apparatus being combined
with the delivery cock or valve of the acetylene generator by suitable mechanism
in such a manner that the supply of water to the carbide is automatically inter-
rupted whenever the delivery of the gas is interrupted, independently of the
pressure of the acetylene in the receiver.
I prefer to construct my improved controlling apparatus as follows;-
In the tube supplying the water to the carbide, I provide a needle valve which
is connected with a piston acted upon on the one side by the pressure of the
acetylene in the receiver and on the other side by a spring or air under pressure
in the closed end of the cylinder in which such piston works. When the pres-
sure of the acetylene increases, the piston is moved in such direction as to
approach the needle valve to its seat and thereby to diminish the supply of
water to the carbide and consequently, also the production of acetylene.
The piston is also connected by a rod having a slot at its end with a link
having a pin at its end engaging into such slot, the link being actuated by a
cam or excentric on the shaft actuating the delivery cock or valve of the acety-
lene generator. This mechanism is so arranged that when the delivery cock or
valve is closed, the one end of the slot of the link operated by the cock or valve
actuating shaft comes to bear against the pin on the rod connected with the
said piston and thereby displaces this piston so far that the needle valve is
forced down upon its seat. When, however, the delivery cock or valve is open,
the said cock is so far displaced as to set free the pin engaging therewith and
thereby to permit the piston and the needle valve connected therewith to move
as far as the pressure of the acetylene in the receiver may allow, under the action
of the spring or air under pressure in the cylinder of the said piston.
By this means a greater safety and a considerable saving is obtained inasmuch
as the production of gas is interrupted when no gas is delivered so that no exces-
sive pressure can occur, and no leakage results therefrom when no gas is
delivered.
Dated this 2nd den of a 1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.

page_text: Improvements in Controlling Apparatus for Acetylene Generators.
I, ISIDOR SAXL, of No. 11, Darwingasse, Vienna, Austria, Professor, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement-
My invention relates to an improvement in apparatus for the development of
acetylene gas from carbide by bringing the latter into contact with water.
the
By means of the invention, on the one hand, too sudden increase of the
pressure of acetylene gas is prevented by arranging that the quantity of the water
which flows upon the carbide shall become proportionately smaller as
pressure of the acetylene gas increases, and that when the pressure exceeds a
given limit the supply of water is completely shut off, and on the other hand
the water supply to the carbide is cut off as long as the exit cock for the acety-
lene gas is closed, whether the pressure of the gas has reached the maximum
or not. By this means the loss of gas during the filling of the apparatus with
calcium carbide is prevented.
The invention has special value for the effective production of acetylene in
the smallest quantities and especially in transportable lamps.
Referring to the accompanying drawing: Fig: 1 shews a vertical section of
the arrangement; Fig. 2 shews a side elevation of the same; Fig. 3 shews a
modification.
The present apparatus consists essentially of a valve B placed in the tube A
which supplies the water to the carbide; the said valve B is connected with the
close-fitting movable part (lid or piston) of the cylinder D by means of a rod E.
The air contained in the interior of the cylinder D acts upon the part C under
a pressure which is little greater than that of the atmosphere. The cylinder
is placed in the water space H, in which the pressure of the acetylene produced
in the production chamber G prevails because the acetylene is conducted through
the tube F to above the water level in H. As this pressure rises the closing
part C of the cylinder is correspondingly depressed and the opening of the
valve B is correspondingly diminished. When a given pressure which is
regulated by adjusting the pressure of the air in the cylinder D) is exceeded,
the valve is fully closed.
The above described arrangement is fixed in the water space H from which
the water flows into the tube A open at the top. The access of water to the
carbide in the chamber G and consequently the development of the acetylene
gas will therefore be the more delayed, in proportion as the pressure of the gas
developed increases, and finally ceases entirely at a certain limit of pressure. In
order to be able to close the valve B when the exit cock 0 for the acetylene
gas is closed independently of the pressure prevailing in the water space H, the
following device is adopted :-Upon the axle of the exit or burner cock 0 there
is placed an eccentric P having a ring Q (Fig. 2) the rod R of which is con-
nected to the upper end of the bar E by means of the bolt U and a slot. The
position of the eccentric is so chosen that when the aforesaid cock is fully closed,
the eccentric P presses down the bolt U not only to the lower end of the slot
(as shewn in dotted lines in Fig. 2) but also the bolt U presses down the bar E
until the valve B is pressed fully upon its seating: This arrangement can also
be carried out in the manner shewn in Fig. 3. The valve B is supposed to be
placed vertically under the cock and the upper end El of the bar E is placed
in the exit tube E3 but so as not to obstruct the passage of the gas.
of the cock is formed non-cylindrical at one end of its bore as shewn at 01 and 5
The stem

page_text: a spring E is so placed that it strives to press the upper end E of the bar E
against the stem of the cock. If the cock O is open as shewn in Fig. 3, the
bar E can be raised higher on account of the shape of the parts 001 of
the stem of the cock, so that its position is only influenced by the pressure of the
gas in the water space. If, however, the cock be closed, the bar E is pressed
down upon the stem of the cock until the valve B is pressed firmly upon its
seating and this without reference to the pressure of the gas.
From the foregoing it will be seen that when the cock is open, the valve B
regulates the flow of water according to the pressure of the gas; but when the
cock is closed the valve B shuts off water under all circumstances.
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed I declare that what
my said
I claim is:-
1) A regulating device for generators of acetylene gas from carbide char-
acterised by the arrangement that the gas outlet cock (U) is connected with a
valve B automatically regulating the admission of water to the carbide in
such a manner that the limit up to which the valve B can open is determined
by the position of the exit cock Q, and that by closing the said cock the water
valve B is also necessarily closed.
2) A modification of the device set forth in Claim 1 in which the gas cock O
has an eccentric P the ring Q of which is connected by the bar R and a slot
and bolt U with the upper end of the bar E of the water valve B, in such a
manner that when the cock is fully opened the eccentric P is at its upper dead
point and the bar E has room to open the 'valve to the utmost, whereas in the
closed position of the cock the eccentric presses down the bars R and E so that
the valve B is necessarily pressed upon its seating.
3) A modification of the device set forth in Claim 2 in which a portion of the
stem of the gas cock O is formed non-cylindrical, and against such portion O
the upper end of the rod E is pressed by a spring E2, so that when the cock is
closed the bar E presses down the valve B upon its seating, whereas in the open
position of the cock the said bars together with the valve have room to rise.
4) A modification of the device set forth in Claim 1 in which the valve rod E
is firmly connected with a piston C which latter moves in a cylinder D and is
influenced on the one hand by the pressure of the gas, and on the other hand
by the pressure of the air enclosed in the cylinder D, so that when the gas pressure
rises the outlet through the valve B is diminished by the displacement of the
piston C substantially as described.
Dated thin Lat
T1
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.