DE1942075A1 - Dispenser for liquids - Google Patents

Description

4 DÜSSELDORF 1 PATENT LAWYERS

Malkastenstrasse 2 1 ^ Λ 9 Π 7 *? DIPL.-ING. ALEX STENGER

Telephone (0211) 360514 ^{£ m U} ' ³ DIPL.-ING. WOLFRAM WATZKE

Our reference: 10 ^ 90 Date: 18 . AUg . 19Ö9

■ S.A.T.A.M, SOCIETE ANONYME POUR TOUS APPAREILLAGES MECANIQUES, 63-77 Avenue Du General Leclerc, La Gourneuve / France

Dispenser for liquids

The invention relates to a dispensing device for liquids, esp. Propellants, with a measuring device for measuring the amount of liquid drawn off and with at least one controlled by the measuring device Advertisement.

Such dispensers are mostly used to draw off liquid fuels based on carbon-hydrogen in the tanks of vehicles needed, operated by an internal combustion engine;. ' will. The dispensers are generally one through one Flow meter for the drawn liquid operated display, in order to measure the amount of drawn liquid during the dispensing process itself Indicate fuel; usually a second display is provided, which also continuously shows the price of the tapped Shows the amount of liquid.

So far, the displays have been operated mechanically, which has a number of disadvantages. One such disadvantage is, in particular, the difficulty in adapting the spatial position of the driving and driven components to one another, and it has already been proposed to use electrical drives for the displays. The application of electrical actuation '· systems for the ads is jedooh turn disadvantageous, because this is a fire hazard 1st given that requires a very large spark safety of the electrical components. This solution is therefore very expensive.

On this basis, the invention has set itself the task of to create a dispenser without mechanical drive transmission means for the displays and without creating a fire hazard through the use of electrical systems.

009817/0390

Telegram address: Dabipdent Pottfchedckonto Cologne 227610

For a dispenser of the type mentioned with a measuring device to measure the amount of liquid drawn off and with at least one display controlled by the measuring device to solve this Task proposed according to the invention that the measuring device drives a pneumatic pulse generator and that this controls the existing displays

In a dispensing device according to the invention, the cumbersome and costly position adjustment of the driving and the driven Elements avoided in relation to one another, since simple flexible lines are used to transmit pneumatic impulses can. There is also no risk of fire when using a pneumatic system.

Some advantageous refinements of the invention are shown below described, one of which is that the pneumatic pulse generator is assigned a pulse number predictor with which the number of air pulses generated per unit of quantity of the drawn liquid is specified.

There is another advantageous embodiment of the invention in that two pulse generators, a quantity display and a price display are provided and that the pulse number predictor the the pulse generator controlling the price display is assigned, while the number of pulses per unit of measure is fixed. Of the The purpose of the impulse number preset is to preset any price per unit of measure. .

A particularly simple version of the pneumatic control system results when the displays can be adjusted with the cycle and when an air pulse corresponds to an adjustment cycle. in the individually, the drive for each display can then be set up in such a way that it is operated by an air-driven actuator and that this is controlled by a plurality of pawl arrangements which are cyclically released by the air pulses will.

009Ö17 / Ö390 ■ - 3 -

The pneumatic control system is also suitable, at the same time, as a pump conveying the liquid through the quantity measuring device to control. A lock with the tap of the dispenser can also be included in the system.

An exemplary embodiment of the invention is based on the following a drawing described in more detail; show in detail:

Fig. 1 is a front view of a dispensing device according to the invention,

2 shows a circuit diagram with the control of the displays and with an associated interlocking circuit,

Fig. 3, partially in section, a side view of the air pulse generator ,

FIG. 4 shows a section along the line 4-4 in FIG. 3, FIG. 5 shows a section along the line 5-5 in FIG. 4,

FIG. 6 is a rear view seen in the direction of arrow 6 in FIG. J) ₃

FIG. 7 on an enlarged scale compared to the representation according to FIG a partial front view of the displays,

FIG. 8, on a larger scale than in FIG. 7 *, the front view the price display shown in Figures 1 and 7,

9 shows a section along the line 9-9 in FIG. 8,

10 is a rear view of one shown in FIGS. 8 and 9 Belt control,

11 is a front view of another part of the belt control;

12 is a rear view of that shown in FIGS Quantity display with the housing removed,

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Pig. 13 shows the view of the parts shown in FIG. 12, in which some parts are shown in section,

Pig. 14 shows a section along the line 14-14 in FIG. 13,

15 shows the detailed view of the for resetting the displays serving device.

The dispenser illustrated in Figure 1 has a housing 20 in a generally rectangular shape when viewed from the front. That Housing 20 stands on a base 21 on which a quantity measuring device 22 and a not shown here, by an electric motor driven pump are arranged, the pump is used to dispense the liquid from a storage tank in the Quantity measuring device 22 to promote. On the top of the housing 20, a horizontal pivot arm 24 is attached, on one of which End one side of a filling hose 25 is attached, while at the other end of the pivot arm 24 a holding device for a tap 26 is seated connected to the other side of the filling hose 25; thus the tap 26 on the horizontal pivot arm 24 can be hung when it is not needed. From the output of the quantity measuring device 22 leads a Line 27 through the housing 20, which via a rotatable connecting sleeve is connected to a line 28 located in the horizontal pivot arm. This in turn leads to the input side of the filling cylinder 25.

In the upper part of the housing 20 there is provided a viewing window 29 which extends in the horizontal direction and in which a counter housing 31 is arranged. This is rotatably mounted on annular bearings 30 and 20A arranged around the line 27 (FIG. 7). On one side of its axis of rotation, the counter housing 31 has a quantity display 32 and on the other side thereof a price display 33 * while a unit price display 3 ^ · is arranged between the quantity display 32 and the price display 33 and a little higher. The quantity display 32 and the price display 33 are designed in the form of a drum, while the unit price display J> k has an endless one

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Tape is provided, the respective existing numerical values of the individual displays being visible through windows located on one side of the counter housing 31. Since this can be rotated by 180 °, the numerical values can be observed from both sides of the housing 20. ' ^:

The quantity measuring device 22 has an output shaft 35 which drives an air pulse generator 36, the air pulses for control the drive of the quantity display 32 and the price display 33 are used. These themselves are operated by an air-powered actuator driven, which constantly exerts a driving force on them, while the air pulse generator 36 generated by the air pulse generator a pawl ring consisting of pawl washers and pawls control in such a way that a latch is released with each pulse of air, so that the specified adjustment cycle of the pawl disc can be carried out.

Since the quantity display 32 and the price display 33 are in the same To be driven and controlled in a manner, only the drive and the control of one of the two will be described below.

As can be seen from FIGS. 12 and 13, the quantity display 32 contains in the usual manner a series of drums 37, 38, 39 and 40 lying coaxially to one another, the drum 37 being driven directly by the air pulses coming from the air pulse generator 36. Thus, the drum 37 is rotated halfway once for each quantity drawn, it being provided with markings for fractions of this quantity unit; the drum 31 is here driven by the drum 37 via a reduction device of the usual type, so that the drum 38 executes only a tenth of a turn for each revolution of the drum 37. A corresponding [de Untersetzungsvorriohtung then drives the subsequent drums.

Hit the drum 37 a toothed turbine wheel 41 is connected, daa from two nozzles 42 and 43 si * air is applied; these are arranged at a distance on the circumference of the turbine wheel 41 «

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which is different from the tooth pitch of the turbine wheel 41. The nozzles 42 and 43 are supplied via an air line 44, so that when this air is supplied, a constant Driving force acts on the turbine wheel 41 and the drum 37.

Ratchet disks 45, 46, 47, 48 and 49 are also attached to drum 37, ten of which are equidistant from one another has lying teeth; this distance then corresponds to an angle of 36 °. The pawl disks 45 - 49 are in their angular position arranged in such a way that the corresponding teeth of adjacent ratchet disks have an angular distance of 3 * 6 °

There are two groups of pawls, one of which is formed by the five pawls 51A, 51B, 51C, 51D and 51E, which cooperate accordingly with one of the pawl disks 45-49. The same applies to the second group of five mutually aligned pawls 51P * 51G, 51H, 51J and 51K. The angular distance between the pawls 51A-5IE existing group and that consisting of pawls 51P - 51K Group is 18 °. From the angular spacings specified for the pawl disks and the pawls, it follows that the successive Loosening the pawls of a group and then loosening the pawls, also one after the other of the other group, the drum 37 can rotate in adjustment cycles of 3 * 6 °.

The pawls 51A-51E and the pawls 51P-51K are as in FIG FIG. 13 can be seen, mounted at pivot points 52 and 53, respectively; each pawl has a pawl arm 54 with a pin 55 that engages in the Enlarged end of a channel 56 engages, the sioh in one Control housing 57 is located. Each channel 56 has a line 58 and is provided with a ball, which is normally rests on a ball seat 6l located in the channel 56. The ball 59 can, however, be removed therefrom by air pressure and pressed against the pin 55, so that the pawl releases itself. The relative position of the main centers of gravity to the position of their pivot points is chosen in such a way that it

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Handle positions are brought, with stops 62 provided are to limit the movement of the pawls when loosening them.

The lines 58 through which the corresponding pawls are operated are provided with the same reference numerals as these Pawls, so that air pulses conducted through line 58A release pawl 5IA, etc.

The following is to be described with reference to FIGS. 3 to 6 how the pawls are released by the air pulses. In Figures 3 and 4 is part of the Quantity measuring device 22 is shown together with the output shaft 35 and the air pulse generator 36. This arrangement has three plates 63, 64 and 65 parallel to one another and two annular disks 66 and 67 lying coaxially with one another; the panels 63 * 64 and 65 are provided with bearings for two shafts 68 and 69 lying in the same axis, each of which has a disk 71 and 72, respectively carries, which are rotatable within the annular disk 66 and 67 assigned to it.

A spur gear 73 is placed on the output shaft 35 and meshes with a spur gear 74 placed on the shaft 68 The spur gear 74 drives via a gear reduction 75 (Figure 3) the input of a variable transmission 76, the output shaft of which is coupled to the shaft 69 via a further gear reduction 77 is. The variable transmission 76 can be of any Be designed, in particular of such a design as it is suitable for driving the price display of a dispenser; the gear ratio function of the variable transmission 76 is described below.

The disks 71 and 72 are driven by the shafts 68 and 69 via friction clutches 78 and 79, respectively, which allow the disks 71 and 72 seated on the shafts 68 and 69 to rotate freely so that the disks 71 and 72 can be reset The friction clutches 78 and are designed here as friction roller clutches ·

009017/0390

The ring disk 66 and the disk 71 form the air pulse generator which operates the quantity display j52, while the ring disk 67 and the disk 72 represent the air pulse generator used to operate the price display J53 Amount indicator 32 serving air pulse generator is described.

As can be seen from FIG. 5, the annular disk 66 is provided with a plurality of channels 81 which are arranged at a certain angular distance from one another and which are correspondingly connected to the lines 58A 58K in the arrangement shown in this figure. In the same radial plane as each channel 81 there is a second channel 82 in the annular disk 66, all of the channels 82 being connected to a connecting piece 83 provided in the annular disk 66; this in turn is connected to a line 84 which is connected to a compressed air supply. A sealing surface 85, which seals the channels 82, extends over the entire circumference of the disk 71; On the sealing surface 85 wider disc parts 86 are provided at a uniform angular distance from one another, which extend over that part of the ring thickness into which the channels 81 open. Each disk part 86 is provided with a connecting slot 87 with which the channels 81 and 82 can be connected when they lie in the same radial plane. Seen in the circumferential direction, the width of the disk parts 86 is smaller than the distance between two adjacent channels 81, and the arrangement is chosen so that when a disk part 86 leaves the position in which the connecting slot 87 connects the channels 81 and 82, a other disc part comes into such a position that its connecting slot 87 connects another pair of channels 81 and 82. In this way, with the rotation of the disk 71, air pulses are given into the lines 58A-58K at regular angular intervals.

The friction clutch 78 includes rollers 88 (Figure 5) which are between an inner cylindrical surface 69 on the disc 71 and a flat surface on a drive disc 91, which on the

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Shaft 68 is attached. The rollers 88 are brought into engagement by springs 92 with the aforesaid planes. To solve the Clutch, a piston 93, which slides in a cylinder 94 attached to the plate 63, is acted upon with compressed air. Of the Piston 93 is able to move a clutch lock 95 seated on the shaft 68, which is controlled by a clutch on said shaft 68 Shaft seated pin is guided, which slides in a * coupling block 95 located in a helical slot; this causes an angular movement of the coupling pins 96 (FIG. 4), which pulls the rollers 88 out of their position of engagement removed.

In order to be able to bring the Soheiben 71 and 72 back into their respective zero position after completion of a dispensing process, in which the line 58A is connected through the channels 81 and 82 with the line 84 as the starting position of a rotary movement of the said discs and in which the first air pulse through the line 58A is, each of the disks is provided with a gear ring 97 71 and 72 engaged with a toothed segment 98 in F ⁴ ngriff · This is displaced in one direction by a spring 99 in rotation, while driven by the rotation of the Mengenmeßgeräts 22 Disks 71 and 72 rotate the toothed segment in the tensioning direction of the springs; So when the friction clutches 78 and 79 are disengaged, the disks 71 and 72 are rotated back to a position limited by stops. These stops consist of stop arms 101 which engage with drivers 102 on the disks 71 and 72 (FIG. 5); The stop arms 101 are held by springs 103 in a position in which they lie on the path of the drivers 102, but the stop arms 101 can be pivoted against the force of the springs 103 in order to let the drivers 102 pass when the discs 71 and 72 driven by the quantity measuring device 22. It is clear that the angular size of the tooth segment 98 is sufficiently dimensioned that the disks 71 and 72 can be brewed from any desired position to a single position in which a connecting base seat 87 in the respective base connects the conduit 58A to the conduit 84 when the next rotation of the Sohel-

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be should take place from their starting position.

In the annular disk 67 there are channels 104 in an annular arrangement, which correspond to the channels 81, and channels 105 * which correspond to the channels 82; The disk 42 also has wide disk parts 106 which have connecting slots 107 for connecting these channels, as was previously described in connection with the annular disk 66 and the disk 71. The channels 104 are connected via lines 108A-K to a control device for releasing the pawls associated with the price display which is similar to that previously described with reference to FIGS. 12 and 13 for the quantity display 32. Of the lines 108 AK in FIG FIG. 4 only one entered with the designation 108, while the rest are only shown in the circuit according to FIG.

The choice of the gear ratio in the variable transmission 76 is made by turning an adjusting knob I09 (Figures 3 and 6), with the adjusting knob 109 a disc 111 is rotatable, which is in a circular recess 112 inside a disk-shaped housing 113 is arranged, which in turn is attached to the transmission housing. As below loading. is written, the position of this disc 111 is used for control a lock to ensure that the liquid can only be drawn off when the variable Gearbox 76 is really set to that price, which 'the quantity clarity prelsanzelge 34 indicates. This is shown below described.

The unit price display shown in FIGS. 8 to 11 34 Consists of two rectangular ones at a certain distance from one another arranged plates 114 built «with between these at each of its four corners rollers 115 are attached to the one endless flexible belt II6 runs. One of the roles 115 can with With the help of an externally attached adjusting knob 117 can be turned and is also provided with radial lugs which engage in holes in the belt 116 and produce an efficient drive. I'm part of the tape through a window in the

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Unit price display 34 visible numbers (Figure 11), to display the currently set unit price; another part of the belt 116 (Figure 10) is provided with a series of provided at a certain distance from one another arranged holes 118 which are inclined on a to the longitudinal axis of the belt 116 Lie straight. On one side of the space between the two plates 114 are in one to the longitudinal axis of the belt Il6 at this point inclined row ten tubular connecting pieces 115 are arranged, which are the same distance from each other which is less than the distances between the holes Il8j located in the band 116, and the straight line is on which the connecting pieces 115 are arranged, inclined relative to the longitudinal axis of the belt 116 at a greater angle than that Straight line on which the holes 118 lie.

A control device 119 is arranged between the plates 114 parallel to the side on which the connecting pieces 115 are located. lead out of the ten conduits 121; each of them is in a different connection piece 115a Axis, the outer ends of the conduits 121 also lying in a common plane, so that they are with the inside of the belt 116 are in contact. In each connection piece 115a, a pipe socket 122 is arranged, which is held by a spring is pressed against the outer surface of the band 116, so that this is also pressed again against the ends of the conduits 121 is pressed. Each line pipe 121 leads through a check valve 124 in a collecting line 123 of the control device II9.

At each connection piece 115a there is one to a radial channel 126 in the housing 113 leading line 125 is connected, the housing 113 being attached to the variable transmission 76. the Corresponding lines are in the drawing with 125L - 125U and it will be seen that by properly adjusting the strap II6, each of the holes 118 will be once in alignment can be brought with a certain connection port 115a, so that a connection between this connecting piece 115a and the collecting line 123 is established, which is only in this single

GDS817 / 0390. _12th

gen position of the band 116 can arise. The prices on the band 116 are matched to the position of the holes 118 so that a very specific connection to the manifold 123 always corresponds to a specific price.

The radial channels 126 in the housing 113 are as shown in the figures 3 and 6, connected to a pipe section 127 which opens into a support surface 128 in the housing 113. This estuary is covered by one side of the disc 111 and by one side of another disc 129 which is between the disc 111 and the support surface 128 is arranged. From the pipe pieces 127 lie six on a certain pitch circle, whereby these are connected to lines 125L, M, N, 0, P and U. The remaining four pipe sections 127, which are connected to lines 125Q, R, S and T, are located on a slightly larger pitch circle are (Figure 6). There are ten openings in the disk 111 131 at an angular distance from each other which is a little smaller than that of the pipe sections 127; six of the openings 131 are on top the same smaller pitch circle as some of the first six pipe sections 127, while four of the openings 13I are on the same larger pitch circle like the other pipe sections 127 lie. The additional disc 129 is arranged so that they opposite the Housing 113 can perform a limited, dead angle movement, the disk I29 by a spring I32 in the direction of the a limitation of this permitted relative movement is pressed; the disk 111 can move in a predetermined angular range rotate freely with respect to the disk 129 while a further movement entrains the disk 129; In both cases, the Relative movement limited by pins that are guided in arcuate slots. The disc 129 has five openings I33, which coincide with five of the pipe sections 127 lying on the smaller pitch circle when the disc 129 is in that Position in which it is held by the spring 132. the Disk 129 also has three additional openings 134 which, when the Backlash between the two disks 111 and 129 has been passed through, with three of the openings 13I in the disk IU Are coverage. Furthermore, in one between the fifth opening,

009817/0390 _ ,,.

133 and the first opening 134a is a radial angular position Slit is provided, which in a first position of the disk 129 with the sixth lying on the larger pitch circle Pipe section 127 is in cover and that after passing through the Tetganges of the disk 111 remains in congruence with the sixth opening 131 in the disk 111. So there is with each of the ten Positions of the adjusting knob 109 that have a certain transmission ratio of the variable gear 76 corresponds to a single position in which a piece of pipe 127 with the in the Disks 111 and 129 located openings is in congruence and A plug-in tube 135, which sits on a flexible line I36, can be inserted into this pipe section 127. Only if the line 125 going out from the stirring piece 127, into which the plug-in tube 135 was inserted, also with one of the holes II8 in the Band Ho and communicating with manifold 123, air can pass through housing 113 and controller II9; as will be described later, this airway must be present in order to enable a liquid to be drawn off. That Push-in pipe 135 is, when it is inserted into one of the pipe sections 127 / is held in this position by a locking ball 137.

The drums of the quantity indicator 32 and the price indicator 33 become reset to its zero position by lever 138, one of which is shown in FIG. The lever 138 is made by springs 139 pressed against a heart-shaped curve eyelet 141 which in FIG. 15 is carried by the drum 37. The cam disk 14l pushes, proceeding from the starting position of the drum 37, the lever I38 into their locked positions, which they suffered through Pawls 142 are held. In this position the lever 138. transmit the gearwheels 143 attached to them via others Gears on the drums In the usual way, a rotary movement.

The pawls 142 for the drums of the quantity indicator 32 and the free indicator 33 are placed on a common shaft 144 (FIG Piston 146 slidably disposed of

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is pulled by a spring 147 in one direction and the by air pressure in the cylinder 145 into the opposite Direction can be moved; a piston rod 128 connected to the piston 146 is in turn articulated to two slide plates 149 and 151 (FIGS. I3 and 14), wherein the slide plate 149 has a longitudinal gate into which a Pin 152 engages. This is in turn attached to a pivot arm 153 carried by the shaft 144. The slide plate 151 carries a curved lever 154, on one arm of which a Pin 15 $ is attached. This stands with a stop edge 156 of another arm carried by shaft 144.

During a dispensing process, the piston 146 is held in the position shown in FIG. 14 by compressed air, so that the spring is compressed; however, the compressed air is released from the cylinder 145 let out when a dispensing process has started, so that the spring 147 can adjust the piston 146, which follows will be described.

First, the pin 142 slides in the slot located in the slide plate 149 until the pin 155 abuts against the stop edge 156, the curve shape of which is chosen so that the curved lever 154 is prevented from rotating by a stop 157 until the Shaft 144 is rotated enough to release pawls 142; then the crooked lever 154 abuts a stop 154a so that the shaft 144 is released and the pawls 142 can return to their engaged position. The slide plate 151 has a connecting edge 158 which cooperates with a tracking roller pin 159 which is carried by a curved lever 16I. The latter is attached to a pivot arm 142 which is connected via a connecting rod 163 to a pivotable plate 164; on this sit the stops 62 limiting the movement of the pawls 5IA- 51K , these pawls controlling the drive of the quantity display and the price display 33; pivot pins I65 are also arranged on the pivoting plate, which when the slide plate

009817/0390 _{β 15} _

ten 149 and 151 are moved to reset the displays, be pivoted by adjusting the plate 164. The adjustment of the plate 164 is made by the movement of the RoIlzapfeaa I59 along the stop edge 158 causes the pawls 5IA to "" K to be released and the pawl disks first 45 to 49 can be released for resetting to the zero position. The further forward movement of the piston rod 148 lets the roller pin 159 along a surface 158a of the stop edge I58 run, whereby the resetting of the plate 164 in the in Figure I? location shown is released. This can also be used by the handles 5IA to K reengage with the pawl washers $ 5 to 49 that are now in the desired location. With the reverse Operation of the slide plates 149 and 15I are running the roller pins 150 freely over the stop edges I58, which is on the pivoting of the crooked lever I6I around its pivot point is due.

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The control of the dispensing device according to the invention is described below with reference to FIG Ensures pin and prevents any incorrect function.

An air holding valve 166 is controlled by the suspension device for the tap 26, which closes a line 167 when the tap 26 is hung and holds the air under pressure in it, whereby a switching valve I68 is kept closed, which separates the tap from a compressed air supply line 169 . The air pressure prevailing in the line I67 also serves to hold the cylinder 145 connected via a line 17I in a position in which the device for resetting is tensioned into the zero position. When the tap 26 is removed from its hanger, the air escapes from the line I67 so that the switching valve I68 can open; thus air is supplied to the cylinders 94 so that the friction clutches 78 and 79 * which drive the pulleys J1 and J2 of the air pulse generator come into engagement. The air pressure in the cylinder 145 can escape, so that the quantity display 32 and the price display 33 can be reset to the zero position.

Air arrives from the switching valve 168 through the line 172 the line 136, the line I72 through a cover 173 of the cylinder 145 through to one end of a diametrically opposite Channel P is performed (Figure 14); the other end of the channel P is connected to the line 136. The channel P is generally closed by the piston rod 148, only not when the piston 146 to reset the quantity display 32 and the price display 33 is shifted to the zero position and then if an annular groove 174 located in the piston rod 148 between the two parts of the channel P establishes a connection. The control device 123 of the unit price display 34 is with the Control inlet of a two-way switch 175 connected by a line 170, which is passed through the air switching valve I66 and is only open when the air switching valve I66 is in the

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"On" position is. If sin the said control inlet an air pressure is present, the changeover switch 175 is actuated so that air coming from the switching valve 168 is a second switching valve 176 can open, whereby air gets into the lines 44 and the turbine wheels 4l of the quantity display 32 and the price display 33 can be driven. Air also reaches the line 84, which feeds the air pulse generator 36, and to the corresponding one Line that also acts on the air pulse generator for the price display 33. The opening of the switching valve 176 causes also an air supply to a switching device, not shown here, which actuates the electric motor of a drive pump, and an air supply to a device that opens the main valve 32.

Lines I36 and 172, connecting lines 125L to U and the line I70 thus together form an interlock circuit, which ensures that liquid can only be tapped when the quantity display 32 and the price display 33 are reset to zero and if the in the unit price display The price quoted matches the setting of the variable transmission 76.

If there is no air pressure at the control inlet of switch 175, is the output of the first switching valve 168 through this switch 175 and by a line connection established only when the tap 26 is hung in the air switching valve 166, which is interrupted when removing the tap 26, with a Fault indicator I78 connected, of any suitable design can be.

If the tap 26 is then removed from its hanger is opened, a liquid flows through the quantity measuring device 22, and this drives the air pulse generator 36 on, so that air pulses of the quantity display 32 and the price display 33 can be supplied and the amount and price of the drawn liquid can be read. The tapping can

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but only take place if the quantity display 32 and the price display 33 were previously brought to their zero position and if the unit of measure display 34- is set so that it indicates the correct unit price as dictated by the setting of the variable gear 76. The reattachment the tap 26 in its suspension device after completion of a dispensing process interrupts the locking circuit on the air switching valve 166, whereby the switch 175 in its normal position can return and thus closes the second switching valve 176; at the same time line 167 is also closed, in which an air pressure can then build up, so that the piston 146 of the resetting device for the Quantity display 32 and the price display 33 can be reset. Furthermore, the first switching valve 168 is also closed, while with the closing of the second switching valve I76, the feed pump is switched off and the main valve 23 is closed. In addition, the air supply to the air pulse generator 36 is interrupted.

If the air switching valve is in its "off" position when the tap 26 is attached and if the line 167 or the line branch leading to the cylinder 145 should exhibit a malfunction, the first switching valve I68 is opened and the quantity display 32 and the price display 33 are opened reset to its zero position by the spring Iff; since each-. but the interlocking circuit at the air switching valve I66 is closed, the second switching valve 176 remains closed and the motor driving the feed pump is not switched on; the main valve 23 is not opened either. Since the changeover switch 175 is in a position in which air can pass through the air switching valve 166 to the fault indicator I78, this will then indicate an error. If a leak occurs during a dispensing process in the line 167 or in a line branch leading to the cylinder 145, the dispensing process can be completed; However, if the tap 26 is then hung on its suspension device, if the second switching valve 176 triggers the termination of the tap, the first remains

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Switching valve 168 open so that fault indicator I78 is activated will.

In order to prevent further use of the dispenser when the fault indicator 1J8 has responded, the can be used in the fault indicator 178 leading line prevailing pressure is used are to operate a circuit part that has priority over the normal control of the switch for the motor and prevents that this motor switch can be switched on again.

The dispensing device according to the invention can be simplified by that the second switching valve 176, the switch 175 and the fault indicator 178 are omitted, while the remaining elements to be kept. With such a design then the control line of the switching valve 126, the locking line and leads from this to the resetting Device and from this to the plug-in tube 135 * the housing 113 connected to the variable gear 76 is inserted will; Here, the control line between the housing 113 and the unit price display 34 is through a plurality connected by lines, as already described, the control line from the unit price display 34 to the air switching valve 166, where it is opened when the switch is switched on and closed when the switch is closed is. A between the unit of measure price display 34 and the Air switching valve I66 outgoing line branch then leads to cylinder 145, which is to the device causing the zero position heard. A line controlled by the switching valve I68 is connected to an actuator for the motor switch an actuator for the main valve, with the air pulse generators and connected to the nozzles which drive the quantity indicator 32 and the price indicator 33.

When the tap 26 is attached, the control line is on the switching valve 168 and on the device used for resetting

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closed, so that the switching valve 168 itself is also closed is. That. Removing the tap 26 causes the to open Control line on the switching valve 168 and the resetting of the quantity display 32 and the price display 33 in the zero position; when this is finished, the remaining part of the control line connections becomes opened so that liquid can be drawn off. This simplified version of the dispenser is against Faults less protected than the dispenser described first, since a leak in the control line also means that it is switched on of the pump motor allows although the air switching valve 166 is in its "off" position. This disadvantage can be avoided in that the line connected to the compressed air supply via the switching valve 168 via the air switching valve 166 out and then closed when the tap 26 is attached.

The embodiments described herein are only examples embodying the invention, and the control system can be implemented in many points can be changed without departing from the scope of the invention. For example, the selection of each Routes for the air impulses are made at different points in the system by means of logical air switching elements.

Instead of using a rotatable counter housing 31 can this of course also be permanently arranged and on each side of the housing 20 special but coupled quantity displays and price displays included.

If the dispenser according to the invention is to be used, that at the same time the amount to be drawn off is fixed, then can the valve, which ends the dispensing process after the predetermined amount has passed through the quantity measuring device 22, in Be arranged counter housing 31 and rotate with this, wherein the valve to the line 27 leading ^ rotatable line connections Has. The valve in question can be closed by a device that is controlled by the quantity display 32 or

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the price display 33 or by both is actuated.

To enable the rotary movement of the counter housing 31, lines 58A to K, I08A to K and 125 L to U be flexible lines.

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009817/0390

Claims (1)

y "" claims: 1. Dispenser for liquids, especially fuels, with a measuring device for measuring the amount of liquid drawn and with at least one display controlled by the measuring device - ,,: display, characterized in that the measuring device (quantity measuring device 22) drives a pneumatic pulse generator (air pulse generator 36) and that this controls the existing displays (quantity display 32, free display 33). 2. Dispenser according to claim 1, characterized in that the Pneumatic pulse generator (air pulse generator 36) is assigned a pulse number predictor (variable gear 76) with which the number of air pulses generated per unit of quantity of the drawn liquid is specified. 3 * dispenser according to claim 2, characterized in that two air pulse generators (ring disk 66, disk 71 and ring disk 67 and disk 72), a quantity display (32) and a price display (33) are provided and that the number of pulses is preset (variable gear 76) to the air pulse generator (ring disk 66) controlling the price display (33) , Disc 71) is assigned, while the number of pulses per unit of measure is fixed. 4. Dispenser according to one of the preceding claims, characterized in that the displays (quantity display 32, price display 33) are adjustable in cycles and that an air pulse corresponds to an adjustment cycle. 5 · dispensing device according to claim 4, characterized in that one each display (quantity display 32, price display 33) is actuated by an air-driven actuator (drum 37) and that this by a large number of pawl arrangements (Klenkacheiben 009817/0390 - 23 - 45 to 49, pawls 51). 6 dispenser according to one of the preceding claims, characterized in that that the pneumatic control system used to operate the displays (quantity display 32, price display 33) at the same time with the control of a pump conveying the liquid through the quantity measuring device (22) and with a Control switch (air switching valve 166) is coupled, which is operated by a suspension device for a tap (26) will. 7 · dispensing device according to claim 6, characterized in that a A locking system is provided that only releases a liquid when the displays (volume display 32, price display 33, unit price display 34) are in a predetermined position, and that this locking system is controlled by a control valve (air switching valve I66) is controlled. 8. dispenser according to claim 7 »characterized in that the Control valve (air switching valve I66) when actuated by the suspension device for the tap (26) a control line (Line 167) with which a switching valve (I68) that supplies compressed air to the control system is actuated. 9 · Dispenser after. Claim 8, characterized in that by closing the control valve (air switching valve I66) When the tap (26) is attached, the control line (I67) is kept under compressed air and that the switching valve (168) is closed, while the control valve (air switching valve 166) the air pressure in the control line (line 167) is reduced, whereby the switching valve (I68) opens. 009817/0390 10. Dispenser according to one of claims 6 to 10, characterized in that that via the switching valve (168) also the drive motor for the pump is operated. 11 dispenser according to one of claims 7 to 10, characterized in that that with the locking system a device (cylinder 145, piston 146) for resetting the displays (Quantity display 32, price display 33) coupled in zero position and that the failure to reset is considered a fault condition for the interlocking system. 12. Dispenser according to claim 3 and 7 *, characterized in that the locking system is a locking condition which corresponds to a deviation between a unit price indicated by a unit price display (54) and the corresponding setting of the pulse rate predictor (variable gear 76). 13. Dispensing device according to one of the preceding claims, characterized in that that by hanging the tap (26) the entire supply of compressed air to the dispenser is switched off (Switching valve 168). 14. dispenser according to claim 12, characterized in that the Quantity unit price display (34) provided with price information, has endless revolving belt (116) which is provided with passage openings (holes 118) that of the Price display (33) for each possible position of the same a control line (lines 125L to U) except for one side of the band (116) is guided and that the passage openings (holes 118) and the end pieces (pipe socket 122) of the control lines (lines 125L to U) in front of the band (116) a such a position to each other that each price indication is assigned a certain position and that only with this air through the relevant passage opening (hole 118) of the band 009817/0390 - 25 - des (116) can occur. 15 · dispensing device according to claim 14, characterized in that a collecting line (123) on the side of the strip (116) opposite the control lines (lines 125L to U) is provided, each with a check valve (124) a counterpart (pipe 121) for each of the control lines (Lines 125L to U) is in communication. 16. Dispenser according to claim 15, characterized in that the collecting line (12J5) is connected to the control valve (air switching valve 166) and the control line (line l6?) is only released if compressed air is coming from the collecting line. - 26 -