DE683297C - Display device for fire extinguishers with pressurized extinguishing fluid - Google Patents

Description

Display device for fire extinguishers with extinguishing liquid under pressure The invention relates to a further embodiment of the display device for Fire extinguisher with extinguishing fluid under pressure according to claim 2 of the patent 653 775. According to claim: 2 of this patent, in addition to the pressure-influenced, consisting of a hollow body closed on all sides with elastic walls Float connected to an indicator mark visible behind a sight glass is, an additional liquid level indicator is provided, which is from an ordinary Swimmers with brand. The present additional invention has the task placed, these two separate devices for pressure and liquid level indicators to unite into a single facility. This object is achieved according to the invention solved in that only the rigid floating body carries an indicator mark and this Float to the front. Pressure in the fire extinguisher influenced hollow bodies in this way arranged or connected to this in such a way that the standby state of the fire extinguisher indicating complete floating of the rigid float the elastic hollow body is prevented when. insufficient pressure in the fire extinguisher is available.

Further details of the invention will appear from the following Description and the claims.

The drawing shows an exemplary embodiment of the subject matter of the invention shown. The individual images show one with the. Display device fire extinguishers provided according to the invention in section in different operating states.

The display device has an ordinary, rigid float d and one below the same, made of a hollow body with elastic Walls existing expansion float: m body c on, both of which are rigid Brackets k are in connection with one another. On the upper part of the rigid float d a rod is attached, which carries an indicator mark i at its upper end. The status of this indicator mark i can be seen through a glass tube that is closed at the top g can be observed.

The rigid floating body d and the expansion floating body c are surrounded by a perforated guide tube b. At a certain height, a stop pin h is firmly attached in the guide tube b, which controls the movement of the rigid floating body d. limited downwards. If the stai '' - r @, - float d together with the expansion float c moves upwards by a certain amount, this movement is also limited by the stop pin la by the surface of the expansion float c against the stop pin h - bumps.

In the operating state shown in Fig. I, in which the container a is empty and depressurized, the two floats d and c are at their lowest point Location; the display mark i also assumes its lowest position, as a result of which indicates that the container is both empty and depressurized.

In Fig.2 an operating state is shown in which the container a is filled with liquid, but is depressurized. Due to the buoyancy of the rigid floating body d, the floats d and c have now floated as far as the stop pin allows. The arrangement can be such that the indicator mark i is at half height in this operating state. It would also not be possible to cause the indicator mark i to rise by deliberately overfilling the container a with extinguishing liquid, since its movement is limited upwards by the abutment of the expansion float c against the stop pin h.

In Fig. 3 the normal operating state of the fire extinguisher is shown, in which the container a is filled with liquid and is under pressure. As a result of the overpressure prevailing in the container a, the length of the expansion float c has changed. As a result, the rigid float d has gained freedom of movement upwards and now floats until either the indicator mark i finds its limit in the sight glass g or until the expansion float c again hits the stop pin h. This highest position of the indicator mark i can only be reached if the container is both filled with liquid and is under the necessary pressure. If the container were to empty slowly, the floats d and c would inevitably have to sink and thus indicate that the container was emptied. If, on the other hand, the pressure of the container were to gradually decrease, the expansion floating body c would lengthen y d thereby pulling the entire movable display device downwards by a certain, clearly visible amount, which in turn would indicate that the operating state of the is in accordance with the regulations Fire extinguisher is disturbed.

Claims (3)

PATENT CLAIMS: i. Display device for fire extinguishers with pressurized extinguishing liquid according to claim 2 of patent 653 775, characterized in that only the rigid floating body (d) has a. Indicator mark (i) and this floating body (d) to the elastic hollow body influenced by the pressure in the fire extinguisher elastic hollow body (c) is prevented if there is insufficient pressure in the fire extinguisher. 2. Display device according to claim i with arranged above the elastic hollow body rigid floating body, characterized in that det rigid floating body (d) with the bottom of the preferably designed as a bellows elastic hollow body (c) is firmly connected and in the fire extinguisher between the two bodies (c, d) horizontal fixed stop (h-) is arranged against which the elastic hollow body (c) rests with its upper free surface when there is sufficient liquid in the fire extinguisher. 3. Display device according to claim 2, characterized in that the bodies (c, d) are arranged in a tube (b) which is provided with passage openings and is fixedly mounted in the fire extinguisher, in which the fixed stop (k) is attached.