DE2211820A1 - Control device for gas-powered fog horns - Google Patents

Description

concerning control device; for gas-powered fog horns

The invention relates to a control device which makes it possible to use a fog horn as required on a case-by-case basis Case or periodically with automatic control.

Fog horns have been used on ships for many years to generate warning signals when visibility is limited; such a fog horn generates a warning signal as soon as it is is connected to an energy source · Many foghorns use a pressurized energy source as an energy source Gas is used, and unless otherwise stated below, the term "Nebelhorn" denotes a fog horn in which a pressurized gas forms the energy source » deto Until now, the compressed gas has been kept ready in containers and empty containers are replaced by filled containers as required replaces

Numerous control devices are already known which are used in fog horns to control the supply of pressurized gas to regulate in such a way that the desired acoustic signals

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be generated. Many known constructions have provided electrical controls which are difficult to maintain in service for long periods of time. Some foghorns use electrical batteries that must be replaced frequently, so that the usefulness of such foghorns is limited. A disadvantage of the known operating with pressurized gas fog horns is that not all of the available D uckgasmenge _r for operating the foghorn is utilized. This results in economic disadvantages, and the essentially emptied containers have to be replaced by filled containers at shorter intervals so that such foghorns do not serve their purpose, "

In thick fog it is desirable to have a facility available to enable a row of generate acoustic signals by periodically activating the fog horn with automatic control, the position of the ship on which the foghorn is located, constantly display. Here it is desirable that all signals have the same duration, and that the Pauses between the signals are of the same length. Of course, there must also be some facility by means of which the fog horn can be operated as required, it should also be possible to generate signals by hand to initiate or «to terminate.,

The invention is based on the object of creating an improved device for controlling a fog horn. In particular, an improved control device for a fog horn is to be created according to the invention, which makes it possible to to automatically operate a fog horn to

periodically generate signals, and "at the one as needed usable actuating device is provided, by means of which the fog horn at any desired point in time "can be operated. Furthermore, a control device of the type mentioned has been created according to the invention, which works in such a way that the fog horn is operated periodically while observing pauses of the same length, and that all emitted signals have the same length! Furthermore, according to the invention, a control device for a pressurized gas working fog horn has been created in which the entire amount of gas available is used to operate the fog horn. Finally, according to the invention, a control device for fog horns has been created, which in the operates in the manner described and does not require any electrical energy to operate

In order to achieve the stated object, a novel control device has been created according to the invention, which can be connected to a fog horn operated by compressed gas. To the components of this control device includes a reservoir that contains a pressurized liquefied gas. This reservoir is standing in constant communication with an inlet space, which in turn is continuously connected via a choke to a timer chamber, which is a closed chamber deals with several rigid walls, which is provided with a large opening in one of its walls · This opening is closed by a pretensioned resilient diaphragm and it is an automatic signaling control device present, by means of which the membrane in a first position, d. h ·, in an inwardly deflected position can be held with it protruding inward through this opening · Alternatively, this automatic device be arranged to control the signaling so that it enables the membrane to snap

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lead and a second position, cL h ·, one to the outside spring-loaded position to assume when the pressure in the chamber exceeds a predetermined value · With the Membrane is connected to a kinematic link chain, to which a linkage arrangement working with a dead gear heard. A first valve body is attached to the kinematic link chain, which controls the flow of gas through a Opening between the timer chamber and an outlet chamber connected to the fog horn controls · Into this outlet chamber part of the kinematic link chain protrudes into it, and with that part there is one in the outlet chamber arranged spring connected. A rod is attached to this spring, which with the help of an outside of the outlet chamber provided manual control device are moved can,. An angle lever is hinged to the rod, which the Communication between the inlet chamber and the outlet chamber is controlled by the fact that it controls the position of a second valve body in relation to an opening connecting the two chambers regulates ρ

When the fog horn is used, gas from the container enters the inlet chamber and reaches the timer chamber via the throttle connecting the inlet chamber and the timer chamber. that the diaphragm is held in its first position and the first valve body keeps the connection between the timer chamber and the outlet chamber closed. Thereafter, the manual operating device is moved, to move the rod against the biasing force of the spring "This brings the angular lever the second valve body in its open position, so that the intake chamber is connected to the outlet _o Because the discharge chamber is in communication with the fog horn, it is the gas coming from the inlet chamber into the outlet chamber is supplied, so that the

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belhorn generates a signalThe foghorn generates a signal as long as the manual control device in the mentioned Position is held; as soon as the manual override is released, the kinematic one actuates Link chain and the rod connected spring the rod and the bell crank to the second valve body in position to bring, in which the connection between the inlet chamber and the outlet chamber is interrupted.

If the fog horn is to be operated automatically at predetermined time intervals, the automatic control device brought into a position in which the resilient membrane opposite the wall to which it is attached after can spring externally when the pressure in the timer chamber is above a predetermined value. Because the timer chamber is in constant communication with the inlet chamber, the pressure of the gas in the timer chamber is above the predetermined one Value so that the membrane moves outwardly of the wall to which it is attached; this makes the dead one Gear of the kinematic link chain eliminated, so that the first valve body assumes a position in which gas in Form of a seepage flow from the timer chamber into the outlet chamber, by eliminating the dead In the first place, the bell crank is operated so that it brings the second valve body into its opening position, around the inlet chamber to connect to the outlet chamber. As a result, the foghorn generates a signal that is basically using of the gas flowing from the inlet chamber to the outlet chamber. The cross section of the through the first Valve body released opening which establishes a connection between the timer chamber and the outlet chamber, is considerably larger than the cross-section of the throttle which overflows from the inlet chamber into the timer chamber Gas flow regulates As a result, the pressure in the time

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sensor chamber after a short period of time, e.g. 0.75 seconds back so that the diaphragm performs a snap motion to return to its first position. This will make the first valve body brought into a position in which he the connection between the timer chamber and the outlet chamber interrupts, and the second valve body assumes a position in which the connection between the Inlet chamber and the outlet chamber is interrupted. As a result, gas now flows through the inlet chamber with the Throttle connecting the timer chamber into the timer chamber. As soon as the pressure in the timer chamber is high enough ' is, the membrane performs a snap motion to take its second position again, whereupon the described Repeated work cycle.

In another embodiment of the invention, only the timer chamber is connected to the outlet chamber while the fog horn is operated automatically and periodically, so that only from that contained in the timing chamber Gas use is made to turn the foghorn each time Generate a signal to operate.

The invention is explained in more detail below with the aid of schematic drawings of exemplary embodiments explained. It shows:

1 shows an embodiment of the invention in a vertical section;

Pig. 2 in an enlarged partial section the inlet and Outlet chambers of the embodiment according to fig. Ij

Pig · 3 on an even larger scale in a partial section the membrane construction of the Pig embodiment. Ij

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Pig. 4 shows another embodiment of the invention in a vertical section;

Pig. 5 in an enlarged partial section the inlet and outlet chambers of the Pig embodiment. 4; and

Pig. Figure 6 shows, in partial section, the timer and feed chamber construction the embodiment according to Pig. 4 ·

In Pigo 1 a fog horn 10 is shown, which is from can be known construction and generates an acoustic signal when a pressurized gas is supplied to it. To the establishment To control and operate the fog horn 10 includes a storage container 12 which contains a liquefied gas. It is true that one could use "any gas, e.g., carbon dioxide or use the same, but excellent results can be achieved with Preon 12 (dichlorodifluoromethane) «

The container 12, which can be a gas supply container of known type, as it is in shops is available for ship accessories or the like, is connected by a pipe 14 provided with a built-in throttle 14a to an inlet chamber 16 which is separated from an outlet chamber 18 by an intermediate wall 20. The partition wall 20 has an opening 20a, by means of which a connection between the inlet chamber and the outlet chamber, in a manner still to be explained can be produced.

The inlet chamber 16 is through part of a wall 21a, the intermediate wall 20, a wall 21b, part of a Wall 22a and delimited by end walls, not shown. A part serves to delimit the outlet chamber 18 of the wall 21a, a wall 21d, the partition wall 20, a part

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the wall 22a and end walls (not shown) "

According to Pig. 1 there is also a timer chamber 22 which is delimited by several walls, of which the four walls 22a, 22b, 22c and 22d are shown in FIG. 1. End walls (not shown) also belong to the timer chamber 22. The wall 22d has an opening which is covered by a pretensioned resilient membrane 24. The timer chamber 22 is assigned an automatic control device 26 which is provided with a cam 26a which can be rotated about an eccentric bearing axis 26b by means of a handle 26c. The eccentric bearing axis 26b is supported by a bridge 27 attached to the wall 22d. If the automatic control device 26 has been brought into the position indicated by dashed lines in FIGS. 1 and 3, the membrane 24 takes the position shown in FIGS. 1 and 3 with solid lines position after it snaps inward. If the device for the automatic control is brought into the position shown with solid lines, the diaphragm is in the position indicated by dashed lines after it has performed a snap movement outward when the pressure in the timer chamber 22 exceeds a predetermined value or in the one reproduced with solid lines, inwardly fenced. changed position when the pressure in the timer chamber is below the predetermined value.

The wall 22 a has a throttle opening 28, the one permanent connection between the inlet chamber 16 and the timer chamber 22 forms. An opening 30 in wall 22a can establish a connection between the timer chamber 22 and the outlet chamber 18 in a manner to be explained. For a reason to be explained, the opening

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a considerably larger cross-section than the throttle 28, but it is smaller than the opening 20a.

With the membrane 24 is a kinematic link chain with a rod link 32a rigidly attached to the membrane connected «, with the first linkage member 32a is by a working with dead gear connection L a second link 32b connected, which is opposite to the first link can move along a short distance until the dead gear has been eliminated. The linkage member 32b extends through the opening 30 to an arranged in the outlet chamber 18, rigid compression spring 34 designed as a helical spring. In the timer chamber 22, the linkage element carries 32b a valve body 36 movable together with it, the serves to seal the opening 30 in a manner yet to be explained.

A control or actuating rod 38 projecting outward through the wall 21a is connected to the compression spring 34, at the end protruding from the outlet chamber 18, a push button 40 serving for manual operation is attached is. The outlet chamber 18 stands with the fog horn in constant communication via a pipeline 42. On the rod 38 is a rotatably mounted on an axis 44a Angle lever 44 articulated. With the free end of the horizontal leg of the angle lever 44 is a rod 46 articulated, which protrudes through the opening 20 a, and to which a valve body 48 is attached, which on a yet to be explained the connection between the inlet chamber 16 and the outlet chamber 18 via the opening 20a controls.

If the fog horn is to be put out of operation, the handle 26c is in the position shown in fig. I indicated with dashed lines "Off" position at which the diaphragm

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assumes its inwardly sprung position, shown in solid lines in FIG. 1, is the diaphragm in this position, the valve body 36 cannot "move" to the timer chamber 22 with the outlet chamber 18 associate. The gas supplied from the container 12 places the inlet chamber 16 through the throttle 14a and the timer chamber 22 via the throttle 28 under pressure.

If the operating button 40 is pushed inwards, the rod 38 moves to the right, so that the compression spring 34 is compressed. Here, the link 32b does not move to the right, because the link 32a in the inner position of the diaphragm cannot move to the right because the entire dead cycle between the rod links has been eliminated. As a result of the movement of the rod 38 to the right, the bell crank 44 becomes clockwise rotated about its bearing axis 44a, so that the rod 46 is lowered and the valve body 48 out of its position Pig. 1 is moved downward to connect the inlet chamber 16 via the opening 20a with the outlet chamber 18, so that pressurized gas is fed to the outlet chamber l8 and from this via the pipe 42 to the fog horn 10 to a Generate signal. As long as the operating button 40 is held down, the fog horn remains in operation; will the operating button released, the compression spring 34 can push the rod 38 to the left, so that the bell crank 44, is rotated counterclockwise about its bearing axis 44a and the rod 46 extends together with the valve body 48 moved upward to break the communication between the inlet chamber and the outlet chamber.

If the fog horn is to be automatically operated periodically, the handle 26c is brought into the position shown with solid lines, in which the cam 26a assumes the ^H A ^w position shown with solid lines.

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- li -

When the foghorn doesn't work for a while periodically "has been actuated, there is a pressure in the timer chamber 22 which is sufficient to close the diaphragm 24 cause to perform a snap movement outwards until they reach the position indicated by dashed lines reached · However, the membrane does not perform such a movement until the pressure in the timer chamber has gel is sufficiently high so that it reduces the elastic resistance of the membrane and the atmosphere acting on its outer surface can overcome pressure.

Has previously been the foghorn shortly in automatic mode, it is possible that the D _r uck in the timer chamber 22 is not sufficient to bring the membrane 24 to its by-sprung outward position when the handle 26c in the 3? ig. 1 position shown with solid lines is pivoted. However, after a short time, the gas overflowing from the inlet chamber 16 via the throttle 28 into the timer chamber 22 will cause the pressure in the timer chamber to be increased enough to cause the diaphragm to snap outward.

If the membrane performs such a snap movement outwards, the linkage element 32a moves to the right, so that the dead pass between it and link 32b is eliminated; therefore, the valve body 36 moves to the right, χαα to release the overflow opening 30 and to connect the timer chamber 22 to the outlet chamber 18. By this movement of the linkage member 32b to the right, a tensile force is applied to the compression spring 34, see above that the rod 38 is pulled to the right and the bell crank 44 is rotated clockwise to connect the inlet chamber to the outlet chamber. From the inlet chamber

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gas then flows through the opening 20a to the outlet chamber 18, from which the gas passes through the pipe 42 to the fog horn 10 is supplied to generate a signal. The opening 20a is larger than the opening 30, so that the Most of the gas for generating a horn signal of the inlet chamber 16 is withdrawn. Within a short Period of z. B. 0.75 see causes the just described escape of gas from the timer chamber 22 that the pressure in this chamber is reduced so much that the membrane 24 acts on its outside through the atmospheric pressure and its bias is caused to suddenly snap inward. As mentioned, the throttle 28 has a smaller cross section than the overflow opening 30, so that the pressure in the timer chamber rapidly decreases when the valve body 36 closes the opening 30 does not hold closed. Is the valve body 36 in its closed position, builds up in the timer chamber, slowly, e.g. B. within 90 seconds, one pressure on, which then causes the cycle described to be repeated.

The ^ ote passage between the linkage members 32a and 32b is provided so that the valve bodies 36 and 48 remain unaffected while the pressure in the timer chamber is increasing 22 has built up and causes a deformation of the membrane before the membrane springs outwards o The cross-section the throttle 14a is chosen so that the pressure in the outlet chamber l8 does not exceed a predetermined value may increase, affecting the time-dependent control and possibly preventing the membrane from doing so would snap inward.

The signals generated by the fog horn 10, like the pauses between the signals, are relative

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constant length. The length of the pauses between the signals depends on the size of the timer chamber 22, the Size of the opening 30 and, to a lesser extent, the size of the throttle opening 28. The determined by the control device "certain periods of time between successive signals can vary" during automatic operation of the first 15 Isis 20 minutes slowly shorten, Ms the Pressure of the saturated vapor from the container 12 has stabilized as the evaporation of liquefied gas leads to a decrease the temperature of the liquefied gas and therefore leads to a reduction in the pressure in the container. Apart from that from the first signal, which may have a greater length, which is due to it being initially in the timer chamber 22 a higher gas pressure prevails as long as the automatic control device remains unused because the Temperature of the liquid gas is equal to the ambient temperature, the length of the signals changes after reaching of a stable operating state not in a noticeable manner Extent as the pauses between the signals progressively be a little longer until a stable operating state is reached, whereupon the pauses have a constant length maintained. The length of the pauses, like the length of the signals, is also determined by the membrane during operation existing pressure difference determined.

Fig. 4 to 6 show another embodiment uhrungsform, in that of the container 12 via a pipe 14 which is not provided with a throttle and a channel 98 in connection with an inlet chamber 100 stands. The inlet chamber 100 'is through an intermediate wall 102 is separated from an outlet chamber 104, and the intermediate wall has an opening 103. The inlet chamber 100 is delimited by part of the intermediate wall 102, parts of Y / ends 106 and 108 and a wall 112. A part of a wall serves to delimit the outlet chamber 104

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105, © in part of wall 106, part of wall 108 and part of the partition wall 102.

The inlet chamber 100 is provided with a timer and Feed chamber 114 is continuously connected by a throttle 113 in wall 112. The timer and feed chamber is delimited by walls 108, 112, 116, 118 and parts of walls 105 and 106. The wall 105 has an opening which is covered by a resilient membrane .120 which executes snap movements and is of the same construction like the membrane 24. This membrane is assigned a control device 122 for selecting the automatic operation, to which a cam 124 rotatable about an eccentric bearing axis 124a belongs. The device 122 is through a die Opening of the wall 105 spanning bridge 127 supports. The cam 124 can be used for a purpose yet to be explained A handle 128 can be rotated. A kinematic link chain 130 is connected to the membrane 120, to which includes a dead-line connection L, which can be formed in a known manner; together with that of the end of the kinematic link chain facing away from the membrane 120 is a valve body 132 movable, which the connection between the timer chamber 114 and a channel 134 leading to the outlet chamber 104.

A rigid rod 136 protrudes through the wall 105 of the outlet chamber 104. At the outer end of this rod is a with the Hand operated push button 138 attached, and on the protruding from the wall 105 portion of the rod 136 is a spring 140 supported on the outer surface of wall 105, which is a compression spring, which the rod I36, which protrudes through the opening 103 and provided with a valve body 144 at its lower end is biased towards the closed position of the valve body.

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In Pig. 4 and 6 shown with lines The "off" position of the device 122 is. The liquefied petroleum gas from the container 12 "which is Freon 12 or a other gas can act, via the pipe 14-, the channel 98, the inlet chamber 100 and the throttle 113 of the timer chamber 114, in which the pressure in the The pressure in the container builds up. If the fog horn 10 is to be operated by hand, the push button 138 is moved towards the wall 105. Here, the spring 140 is compressed and the rod 136 moves below, so that the valve body 144-the opening 103 exposes and the gas can flow from the inlet chamber 100 via the outlet chamber 104 to the fog horn 10. As long as the When push button 138 is held in its lower position, the fog horn generates an audible signal. Will the push button released, the spring 140 brings the rod 136 back into its position according to FIG. 4, in which the valve body

144 keeps the connection between the inlet chamber 100 and the outlet chamber 104 closed, so that the fog horn is no longer connected to the energy source.

If the fog horn is to be operated automatically, the handle 128 is shown in FIG. 4 with dashed lines Brought "on" position, and when doing so the pressure in the timer chamber 114 is above a predetermined Value is, the membrane 120 moves with a snap motion outward until it reaches the dashed line indicated position reached. If the fog horn did not operate automatically shortly before this point in time, the pressure in timer chamber 114 is above the predetermined value; however, the foghorn became automatic shortly before actuated, the pressure in the timer chamber may be below the predetermined value. However, this causes overflow of gas from the injection chamber 100 into the timer

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chamber 114 via the throttle 113 that the pressure in the timer chamber rises above the predetermined value, so that the membrane snaps outward up to the position indicated by dashed lines executes. With this outward movement of the membrane, the kinematic Link chain 130 moves, the backlash of link L is eliminated, and valve body 132 is in its open position brought to connect the timer chamber 114 to the channel 134 ,, As a result, the gas is out of the Timer chamber 114 rapidly delivered to fog horn 10 via channel 134, exhaust chamber, and conduit 42; to generate a signal.

After a short period of e.g. B, 0.75 seconds, as a result of the release of the gas from the timer chamber 114 just described, the pressure in the timer chamber has decreased to such an extent that the atmospheric pressure acting on the outer surface of the diaphragm and the prestressing of the diaphragm cause the diaphragm to become Makes a snap movement inwards until it reaches the position shown in solid lines in FIG. The pressurized gas is still supplied from the container 12 via the throttle 113 of the timer chamber, so that in the timer chamber, slowly, e.g. B ₈ within 90 seconds, a pressure builds up until the membrane performs a snap movement outwards, whereupon the described work cycle is repeated. In the embodiment according to FIGS. 4 to 6, the chamber 114 acts as a supply chamber and as a timer chamber, because the entire amount of gas required for the automatic operation of the fog horn is supplied to the fog horn when a signal is generated from the chamber 114 in which it is previously stored was »

In the embodiment of FIGS. 1 to 3, the works Chamber 22 primarily as a timer chamber, since the largest

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.- 17 -

re part of the gas to operate the foghorn via the Inlet chamber 16 and opening 20a, the latter being considerably larger than that of 'the timer chamber 22 overflow opening 30 leading to outlet chamber 18. Since chamber 114 acts not only as a timer chamber but also as a feed chamber, it is necessary larger than the chamber 22 in the implementation of Fig. 1 to 3 · The control device according to Figs. 1 to 3 has smaller dimensions, and it works more reliably and uniformly than the control device of Figs. 4 to 6, and in view of this, the embodiment of Figs. 1 to 3 is preferably used, although it is of a somewhat more complicated construction. In the embodiment according to FIGS. 4 to 6 the length of the acoustic signals depends largely on the properties of the foghorn, since it is used to operate the Nebelhorns only the amount of gas that has accumulated in the supply chamber 114 is available; in contrast, influenced the fog horn of the type that is used in conjunction with the control device of FIGS. 1 to 3, the length of the generated signals not to a greater extent, since the supply of actuation energy is only provided by those in the container 12 available gas volume is limited.

In both embodiments described, the pressure prevailing therein causes the valves to be closed, so that leakage losses can only occur to a minimal extent. Both devices use a Containers filled with compressed liquid gas are used. The pressure of the saturated steam in the upper part of the container depends on the temperature of the tank contents, and therefore the operating pressure varies with the ambient temperature. The influence of the ambient temperature, however, is just as significant as the temperature drops off the door, and therefore also the pressure drop; caused by it

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that the gas boiling away from the liquid is fed to the use. In practice, the stabilizes here Pressure of saturated steam at a certain value, which is lower than the normal pressure, which is after expiration a long period of stabilization at the ambient temperature is present, and the said pressure is through determines the amount of gas required per unit of time to boil off the liquid is brought «. To give an example, assume that a fog horn of a certain type it is used that the normal length of each signal is 0.75 seconds and that the pauses between the signals are one Length of about 90 see. On an average On the 2nd day, the conditions mentioned lead to a vapor pressure of about 2.8 atmospheres when using Freon 12

The device works evenly until the last drop of liquid in the container has been used up? if the level of the liquid back, the signal of the foghorn not a long period weakens in the course, as would happen if only a compacted, but would not use a liquefied gas ₀ Ss was found that with the aid of a conventional 425 g can Freon 12 is possible to operate a fog horn of the known type mentioned for over 3 hours

In both embodiments described, this can Fog horn can also be operated by hand when it is in the operating state for automatic control the signaling is located.

The following are the two embodiments given as examples certain dimensions, to which the invention is not limited; this information

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are only intended to supplement the disclosure and provide clues to give for the construction of such devices.

In the Pig. I "to 3 affected the capacity of the chambers 16 and 18, the length of the signals and the pauses, if one is sufficiently large Choose fit. The inlet chamber 16 can have a volume of approximately 50 cm and the outlet chamber 15 one Have a volume of about 100 cm. The timer chamber 22 has a volume of about 165 cm, which is the length of the pauses determining throttle 28 has a diameter of about 0.038 mm, and the equivalent diameter of the signal length determining opening 30 is about 0.405 mn «the The term "equivalent diameter" is used herein because the link 32b extends through the opening. The opening 20a between the inlet chamber and the outlet chamber can be of any size and e.g. B. a diameter of about 6.35 mm. The diameter of the throttle 14a is approximately 1.6 mm. The relationship between the die Length of the throttle 28 influencing the pauses, the opening 30 influencing the length of the signals and the volume the timer caramer 22 determines the length of the pauses between the signals generated by the fog horn and the duration of the individual signals.

In the embodiment according to FIGS. 4 to 6, that is Capacity of the inlet chamber 100 and the outlet chamber 104 irrelevant, and the volume of these chambers can z. B. be about 50 or about 100 cm. The timer chamber 114 regulating the pauses has a volume of approximately 300 cm, and, as mentioned, the timer chamber also functions as a gas supply chamber. Which is the length of the Restricting throttle 113 has a diameter of approximately 0.635 mm. The diameter of the opening 103 is without Meaning and can e.g. B. be about 6.35 mm. Also the

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The size of the opening 103 is irrelevant, and this opening can e.g. B. have a diameter of about 6.35 Mn. The diameter of the rod 136 is approximately 1.6 mm and that of the opening controlled by the valve body 132 about 3.2 mm. The parameters that are used in this embodiment determine the length of the signals and the pauses in the operation of the fog horn, are the volume of the timer chamber 114 and the diameter of the throttle 113, which influences the length of the pauses.

From the above description it can be seen that devices have been created according to the invention, which meet the object of the invention and adapted to the conditions of practical use in an advantageous manner are.

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Claims (1)

PATENT CLAIMS 1.) Control device for a gas-operated fog horn with an energy source in the form of pressurized gas, gekennzei chnet by an inlet chamber (16; 100), a device (14; 14, 98) which constantly connects the inlet chamber with a pressurized gas source ( 12) connects an outlet space (18; 104), a device (42) which permanently connects the outlet space to a fog horn (10), a control device (40, 38, 44, 46, 20a, 48; 138) that can be actuated by the user , 136, 103, 144) for connecting the inlet space to the outlet space, and by means of a device (26; 122) which can be actuated as required for the periodic and automatic transfer of pressurized gas from a pressure source to the fog horn. 2. Control device according to claim 1, characterized in that to which can be actuated as required Means (26; 122) includes a chamber (22; 114) which is in constant communication with the inlet space (16; 100) and means responsive to pressure in the chamber for periodically releasing pressurized gas from the chamber to feed the fog horn (10). 3. Control device according to claim 2, characterized in that the actuatable as required The device (26; 122) has a channel (30; 134) which connects the chamber (22; 114) with the device (42), the constant connection between the outlet space (l8; 104) 2üä839 / 0872 iind the fog horn (10) forms that to the periodically working Means for transferring pressurized gas from the chamber to the fog horn: a flexible elastic element (24; 120), which is movable by the pressure in the chamber, also includes a valve body (36; 132) for opening and closing of the channel and a kinematic link chain connecting the flexible elastic element to the valve body (32a, 32b; 130). 4. Control device according to claim 3, characterized in that the kinematic link chain a connection (L) working in dead gear belongs to. 5. Control device according to claim 3, characterized in that a device (26a, 26c; 124, 128) is present, which makes it possible to hold the flexible elastic element (24; 120) in a position, at the valve body (36; 132) the channel (30; 134) closes. 6. Control device according to claim 3, characterized in that the flexible elastic element a membrane (24; 120) is that the chamber (22; 114) is delimited by several walls that a wall (22d; 105) the chamber has an opening that the membrane is attached to this wall in such a way that it spans the opening, and in that the membrane is biased so that it performs a snap movement in a position in which the valve body closes the channel when the pressure in the chamber is below a predetermined value. 7. Control device according to claim 6, characterized g e kenn shows that the channel (30; 134) clears the chamber (22; 114) with which a constant connection to the fog 209839/0872 horn Mldenden device (42) via the outlet space (18; 114) is in connection. δ. Control device according to claim 7, characterized in that g e k e η η ζ e i chnet that in addition to the control device which can be actuated by the user, a control device is located between the inlet space (16; 100) and the outlet space (18; 104) extending opening (20a; 103), furthermore a valve body (48; 144) to control the opening as well as one by hand "loading. operable means (40, 38, 44, 46; 138, 136) for actuating the valve body and for regulating the opening passing gas stream. 9. Control device according to claim 6, characterized in that the operable by the user Control means a manually operable valve body (48 $ 144) for controlling the connection between the inlet space (16; 100) and the outlet space (18; 104), and that means is present which it allows to move the vitreous body and the two spaces to be interconnected when the periodically operating device (26; 122) causes * the associated valve body (36; 132) the channel (30; 134) opens. 10. Control device according to claim 9, characterized in that the kinematic link chain a rod member (32b) projecting into the chamber (22) and the outlet space (18) belongs, furthermore one in the outlet space attached to this linkage link spring X34) and one attached to this spring from the outlet space protruding rod (38) that the valve body (48) can be moved together with the rod, that the spring is compressed when the rod is moved to cause the valve body to open the two spaces (l6, 18) to connect to each other, and that the other valve body 209839/0872 (36) the channel (30) opens as soon as the pressure in the chamber exceeds the predetermined value. 11. Control device according to claim 1, characterized in that the actuatable as required Device (22; 144) has a chamber which is connected to the pressurized gas source (12) via a throttle (28; 113) stands, and that a pressure-sensitive device (24; 120) is present which is responsive to the gas pressure in the chamber to periodically supply gas to the fog horn (10) when a gas pressure builds up in the chamber and reaches a predetermined value, or to interrupt the supply of gas, as soon as the gas pressure in the chamber during the feeding process has dropped to a lower predetermined value. 12. Control device according to claim 11, characterized in that between the chamber (22; 114) and the outlet space (18; 104) a channel (30; 134) is present that this channel a valve body (36; 132) is assigned, and that the valve body is controlled by the pressure sensitive device (24; 120). 13. Control device according to claim 11, characterized in that between the two spaces (100, 104), there is no direct connection between the chamber (114) and the outlet space (104) a channel (134) extends that this channel is assigned a valve body (132), and that this valve body through the pressure sensitive device (120) is controlled. 14. Control device according to claim 1, characterized through an energy source in the form of a supply of liquid gas to operate the fog horn » 209839/0872 Blank page