US1947383A - Automatic resetting apparatus for dispensing indicators - Google Patents

Description

Feb. 13, 1934. J M, DAYTON 1,947,383

AUTOMATIC RESETTING APPARATUS FOR DISPENSING INDICATORS Filed Nov. 12, 1932 v 4 Sheets-Shasta 1 Maiffighw,

Feb. 13, 1934. J M, DAYTON A 1,947,383

AUTOMATIC RESETTING APPARATUS FOR DISPENSING INDICATORS Filed Nov. 12, 1932 4 Sheets-Sheet 2 chm-$21219 w,

Feb. 13, 1934. J. M. DAYTON 1,947,383

AUTOMATIC RESETTING APPARATUS FOR DISPENSING INDICATORS Filed Nov. 12, 1932 4 Sheets-Sheet 3 Jaanemjyiflg tow,

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Feb. 13, 1934. J. M. DAYTON AUTOMATIC RESETTING APPARATUS FOR DISPENSING INDICATORS Filed Nov. '12, 1932 4 Sheets-Sheet 4 fzaenfir} mama-113 I Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE AUTOMATIC RESETTING APPARATUS DISPENSING INDICATORS Application November 12, 1932 Serial No. 642,450

claims. (Cl. 221-95) This invention relates to a re-setting device for a dispensing indicator, which is operated co-or-' dinately with the dispensing apparatus when this apparatus is set in motion.

A particular embodiment of the invention is set out in the accompanying drawings and following description as applied to a dispensing apparatus for liquids, but it will be understood that the invention is not limited thereto.

One feature of the present invention is the provision of means operated co-ordinately with the driving device for a dispensing apparatus having an indicator, and serving for the purpose of resetting theindicator preparatory to a new dispensing operation. a

In the specific illustration shown, another feature of -the invention comprises the employment of the material being dispensed as a transmitting means for effecting the automatic re-setting of the indicator.

Another feature of the invention comprises a resetting device for the dispensing indicator of a dispensing apparatus for liquids, in which the resetting is only accomplished after the liquid delivery mechanism has been placed in operation, whereby any increase in volume of the dispensing conduit system between the meter and the discharge is satisfied prior to re-setting.

A further feature of the invention is the provision of an automatically operating re-setting device for a dispensing indicator which is so constructed and arranged that it does not interfere with the establishment of an indication, even though the re-setting structure becomes itself inoperative for some reason. v

Other features of the invention will appear in the course of the following description and claims, both in reference to the specifically illustrated form and to obvious possibilities of otherwise embodying the invention.

In the drawings:-

Figure 1 is a diagrammatic view showing conventionally the arrangement of a dispensing device in con unction with its indicator and the automatic re-setting mechanism.

Figure 2 is a view, on a larger scale, substantially on line 2-2 of Figure '7 with the parts in the position of rest.

Figure 3 is a similar view, substantially on line 3-3 of Figure 8.

Figure 4 is a view corresponding to Figure 2, showing a portion thereof with the parts in another position.

Figure 5 is a vertical section substantially on line 5--5 of Figure 4, with parts of the valve cage broken away.

Figure 8 is a vertical section substantially on line 6-4 of Figure 'l,

Figure 7 is a vertical section substantially on line 'l--7 of Figures 2 and 8.

Figure 8 is an end elevation of the indicator and re-setting mechanism, with the indicator dial in section for clearness.

Figure 9 is a detail view showing the hand connecting elements and re-set-limit stop.

Figure 10 is a similar detail view showing the driving connection to the indicator spindle.

Figure 11 is a perspective view of the valve cage.

In Figure l, the invention is illustrated primarily in conjunction with an electrically driven pump for producing a flow of a liquid for dispensing. The flow of this liquid during dispensing is registered through an indicating mechanism: while the liquid under pressure is employed, in this example, prior to the beginning of a dispensing operation, for ire-setting the indicator to a predetermined initial position.

The tank 10 contains a supply of liquid which is to be dispensed. A suction pipe 11 extends downwardly into the tank and is connected through a check valve 12 with a motor-pump as.- sembly 13 which forces the liquid through an outlet pipe 14 and a meter 15, illustrated as being of the flow type, to a hose 16 having the nozzle 1? controlled by a valve 18. In the illustration, the pressure of liquid in conduits 14, 16 is maintained at not to exceed a predetermined maximum by the employment of a by- pass conduit 19, 20, having a regulatable spring relief or by-pass valve 21 therein. The motor-pump assembly 13 may be actuated by current flowing through conductors 13a when the switch 13b is closed.

As the meter 15 is operated according to the quantity of liquid which passes from the nozzle 17, it rotates an indicating shaft 22 having a bevel-gear drive 23 to a shaft 24, which (Figure '7) is connected to the main driving shaft 25 of an indicating apparatus. and operates through gears 25a, 26, 26a, 26b to move the gear 2'? which is held in frictional engagement with a gear 28 fixed on a sleeve 29 and thus a spindle 30 which projects through the dial D and supports a fast hand 31. The sleeve 29 is illustrated as having a further gear 32 which is connected by gears 5011:, y (Fig. 9) to a gear 33 loose on a bushin 34 which likewise extends externally and concentric to the spindle 30 and supports a slow hand 35. Spring clamping plates 36 hold the gear 2'1 in engagement with gear 28; and clamping plates 37 .hold gear 33 in engagement with a cam 38 fixed to the bushing 34. The hands 31 and 35 are positioned opposite a dial D'which may bear suitable indicia. In the illustrated form, the driving parts for the hands are illustrated as supported in the mechanism plates 40. One manner of connecting the several parts for accomplishing the driving relationship as stated, is shown in my co-pending application Serial No.

614,013, filed May 27, 1932, to which reference may be made for illustrative details.

In Figure 9, the cam 38 is shown as having a notch 38a which is engaged by a stop pawl 41 energized by a spring 892: when the sleeve 34 is turned backward, so that the pawl 41 thus operates to limit the re-setting movement and td bring the slow hand to a standstill when it reaches a predetermined initial position. The bushing 29 has a limit cam 42 serving to engage the pawl 43 pivotally mounted on cam 38 during the re-setting movement of the fast hand, so that thereafter the two hands are returned at the same angular speed for re-setting. A spring 44 holds the pawl 43 constantly in engagement with the cam 42.

It will be understood that the driving train from meter 15 to the respective hands operates to move them in the same direction and at determined rates of speed and corresponding to the movements of the meter, so that indicia upon dial D will show the quantity dispensed: and that re-setting is accomplished by moving these hands in the opposite direction back to a predetermined initial position, which is usually zero.

In Figures 1, 2 and 5, the pressure conduit 14 has a branch leading to a connection 51 on a cylinder end 52 of a cylinder 53 having an opposite end 54. These ends are held together by clamping bolts 55, so that the cylinder and its ends are tight against escape of liquid. The connection 51 communicates by a passage 56 with the interior of the cylinder 53. The piston 61 has a rod 62 passing through a packing gland 63 to the exterior of cylinder head 54 and is provided at its outer end with a bracket 64 having a sleeve 65 slidably mounted on a guide rod 67 fixed'in the head 54. The head 54 is further provided with a connection to the relief conduit 68 which leads (Fig. 1) back to the by-pass conduit 20 and thus directly back to the motor-pump inlet. The piston 61 has openings 61a and supports a valve cage 58 (Figs. 2, 4 and 5) which contains two ball valves 59. This cage is shown in perspective in Fig. 11 as formed of sheet metal by cutting and folding, and has openings at its top and bottom for the free passage of liquid into and out of the cage, but is so designed in relationship to the diameter of the balls that the balls cannot escape therefrom, but are supported (in the absence of pressure in the cylinder) at a slight distance below the corresponding holes 61a through the wall of piston 61 (Figs. 4 and 5). Mounted on the cylinder end 52 (Figs. 2, 4 and 7) is a ball raising device which has two ball raising prongs 60 which are received through bottom apertures in the cage 58 when the piston is in fully retracted position, so that they operate to razsezthe balls into the position shown in Figure The heads 52 and 54 are provided with feet 69, which are bolted to a supporting plate 70. This plate 70 is supported on one mechanism plate 40 by stud bolts 71. A pin 72 fixed in bracket 65 pivotally supports a rack 73 which may engage with a re-setting pinion 74 for a toothed intermediate part of its length, the rack being cut away at the ends of the toothed portion to provide flats which permit free rotation of the pinion 74 without interference by the rack while the latter is at its end positions of travel. The assembly of piston 61, piston rod 63, bracket 65, pin 72 and rack 73 are normally drawn toward the left in Figures 1, 2 and 3 by a coil spr ng 75 which is connected at its ends to a stud 76 on the plate 70, and to the pin 72 (Figs. 3, 6, 7 and 8).

The rack 73 is slotted and is normally held in engagement with pinion 74 by a grooved roller 77 located in the slot and mounted by a pivot 78 on an arm 79 which is itself supported by a pivot 80 on the plate 70, and is normally pulled downward for holding the roller in engagement with the rack, and the latter in engagement with the pinion 74, by a spring 81 (Fig. 3).

A pin 82 supported in plate 70 carries a bearing sleeve 83 upon which is mounted the pinion 74 (Fig. 7) and also a gear 85 which is larger than pinion 74, and is in mesh with a gear 86 loosely journaled on a sleeve 87 carried by a pin 88 likewise supported on plate 70. The sleeve 87 has a gear 89 in mesh with the spindle re-setting pinion 90 which is connected to the spindle 30 and the bushing 29. A spring friction device 93 is secured to gear 86 for engaging the gear 89 and driving it in equiangular movement therewith.

The free end of the roller arm 79 carries a pivot 95 joined to an upper toggle link 96 which has an intermediate pivot connection 97 with a lower toggle link 98 mounted by a pivot 99 upon the plate 70. This lower toggle link 98 includes an extension providing an actuatable nose 100 extending to the left of the pinion 74 (Fig. 3). Fixed on the rack 73 are two toggle actuating lugs 101, 102. The clockwise movement (Fig. 3) of the lower link 98 is limited by one of the securing bolts 71.

In operation, the indicator will be assumed to have indicated a previous dispensing operation, and to occupy the corresponding indicating position. With the parts at rest, the motor-pump assembly 13 is at a standstillpthe nozzle valve 18 is closed, the piston 61 is at the extreme left-hand position as shown in Fig. 2; the valves 59 are held in raised position by the prongs 60 but may be free of the openings 61a; and the pressures at the faces of the piston 61 balance.

. When a new customer arrives, the attendant starts the motor-pump assembly 13 by closing switch 135. The pump builds up a pressure in the conduits 14, 19, 50, which is controlled as to maximum by the automatic relief valve 21. The attendant does not open the nozzle valve 18, and substantially no liquid flows through the meter 15. It will be understood, however, that if the delivery conduit 16 is of fabric-reinforced rubber hose, as is now customary, the increase in volume occasioned by the rise in pressure established from the motor-pump assembly 13 is produced and filled by the liquid under the maximum pressure as determined by the by-pass valve 21.

The liquid under pressure in conduit 50 passes into the left-hand cylinder space (Figs. 2 and 4)- and the pressure diiferential causes the valves 59 to close the piston openings 61a. The pressure on the left-hand face of the piston 61 thus forces the piston 61 toward the right (Figs. 2 and 3). The pin 72 carries the rack 73 with it, and the rack is brought into engagement with the teeth of pinion 74. If the meshing of teeth is exact, a clockwise movement of pinion 74 is immediately initiatedi If the meshing is not exact, the rack 73 tends torock in a counterclockwise direction about its pivot 72, thus rocking the roller 77 and arm 79 against the action of spring 81, until meshing occurs as the rack continues its rightward movement. Thereafter, the rack rotates the pinion 74 in a clockwise direction (Figs. 2 and 3), and this movement is transmitted by gear 85 to gear 86 and through friction clamp plates 93 to gear 89, and thus through gear 90 causes a resetting movement of the spindle and its hand 31. It will be understood that the normal driving system of Figure 10 is blocked against movement by its connection to the meter through the gear train, and that the friction device 36 slips to permit the return movement of hand 31. Ultimately, during the rotation of spindle 30 and its sleeve 29, cam 42 engages the pawl 43 and thusa direct re-setting movement, at the same angular velocity as spindle 30, is transmitted to theresetting limit cam 38 which is fixed to sleeve 34 and thus to the slow hand 35. The drive of Fig. 9 from gear 32 to gear 33 results in a slipp e permitted by the spring friction plates 37.

Thus both hands are thereafter returned at the same angular speed toward the initial position.

Upon reaching this position, the notch 38a is engaged by the limit pawl 41, and the slow hand system is thus brought to a standstill. By reason of the engagement of pawl 43 in cam 42, the fast hand system is likewise brought to a stands'tdl. It is preferred (with two hands) that the gear ratio in the re-setting train, and the number of teeth on rack '13, should be so selected that the fast hand 31 can be given not less than two complete revolutions during re-setting, so that it may make substantially a full revolution before the slow hand is pickedup as aforesaid, and substantially' a further revolution in returning to the initial position (as for example may be necessaryin re-setting when the quantity dispensed is just short of the full amount which may be indicated by the hand upon the given dial, with the given train connection from the meter). Since the hands are held in the initial position, the rack continues its movement by causing slipping between the friction device 93 and gear 89 until the piston attains its extreme right-hand position (Figs. 2 and 3). At this time, the flat at the non-pivot end of the rack is opposite the pinion 74 (Fig. 6) so that if the parts are in this position, the pinion is again free for turning in unison with the general indicating system, as for example may be required if the main spring 75 were broken and unable to return the rack to the right-hand position.

At this moment, also, the stud 102 on rack '13 encounters the face 100 of the lower toggle link 98 and rocks the latter in a clockwise direction (Fig. 3) to extend the toggle and thus operates to raise the pivot connection 95 and thus the lever arm 79, so that the pressure roller '17 raises the rack away from-any possible engagementwith the pinion 74. The toggle is limited by one stud bolt 71 (position of Fig. 6), so that the rack is retained in this raised position,

Throughout this time, the pressure differential at the faces of the piston (Figs. 2 and 4) maintains the valves. 59 in closed position. Re-setting has been accomplished, and the hands are at zero position. The attendant now opens the nozzle valve 18 and'eilects the delivery of the desired quantity of liquid to the customer. The maintenance of the maximum pressure through the operation of relief valve 21 assures that the valves 59 will remain seated. The quantity dispensed is indicated through the driving system of the indicator. The drive occurs to the gear 27 and thus to the sleeve 29, spindle 30 and hand 31. The re-setting system, including the pinion 74, turns freely as it isnot hindered by the rack. The movement of cam 42 causes the displacement outward of the pawl '13 from the notch of cam42, and the normal reduction drive occurs through gears 501/, and the slow hand 35 is driven at the proper ratio. 'It may be remarked that the notch in cam 42 is provided to prevent any rebound from the initial position, and to make sure that both hands are at zero when the new dispensing operation begins.

When the dispensing operation is completed, the valve 18 isfinally closed. and the motorpump assembly 13 brought to a standstill by opening switch 13b. The right-hand space in the cylinder (Fig. 2) has been discharging its liquid through conduit 68 .to the motor-pump intake: and the pressure differential between the two faces of the piston has been holding the valves 59 in position. When the motor-pump assembly 13 comes to a standstill, this pressure difierential drops, and the presssure in conduit 50 ultimately becomes identical with that in conduit 68. At this time; the cage 58 is not opposite the prongs 60, and the balls 59 drop from the opening 61a.

The piston 61 is now returned toward the left (Figs. 2 and 3) by'the action of the return spring '75. The rack 73, however, is still held in raised position by the toggle. When the piston reaches its extreme left-hand position (Fig. 2) the prongs 60 have operated to raise the valves 59 ready for closing the openings 61a again. Likewise, the stud 101 engages the upper toggle link 96, in this illustration, and moves this link in the opposite direction and the toggle collapses so that lever arm '79 operates to press the rack '73 down- .ward. This occurs, however, only when the other flat on the rack is opposite the pinion 74, in this illustrative form.

The re-setting parts have now returned to their initial or rest position.

It will be noted that if the main spring '75 should break, a single re-setting movement of the piston 61 toward the right (Fig. 2) will be accomplished, and the rack raised. In the event that, for any reason, the piston 61 drifts backward toward the left while the other parts are at rest, a further dispensing operation will not produce a lowering of the rack nor its engagement with the pinion '74, unless the piston has entirely returned to the left-hand position and thus is ready for a complete re-setting operation. In other words, a partial re-setting is not accomplished by the device, nor does it interfere with the normal course of indication, even though-the main spring is broken. 7

It further will be noted that the re-setting is not completed until the delivery conduit between the meter and nozzle has been filled with liquid to the maximum pressure determined by the bypass valve 21: so that any increase involume or so-ca'lled hose slack" is filled, and the resetting indicates the exact condition of the system at the beginning of delivery. It may be remarked that when resetting is accomplished before the motor-pump assembly is started, the establishment of maximum pressure in this conduit changes its volume in many instances from one-fortieth to one-twentieth of a gallon, representing a quantity which is not delivered to the customer: and if then the attendant stops the motor-pump assembly prior to reading the indi-- cator, the leakage through the normal flow-type meters and their regulating by-passes permit the return of this quantity as the apparatus loses its delivery pressure, whereby in effect the customer does not receive a major portion of this quantity although the same is measuredand indicated by this hose slack and the customer definitely receives not less than the quantity indicated. The customer is further protected in that the pressure in the conduits must be maintained by the system in order to continue a regular indication, as upon cessation of this pressure a new registration begins.

7 It is obvious that the illustrative form of construction may be modified in many ways, without departing from the scope of the appended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent, is

1. A re-setting apparatus for the dispensing indicator of a dispensing structure, comprising a rack and means for reciprocating the same, a pinion in the path of normal re-setting movement of said rack, means including a friction clutch for connecting said pinion with the indicator, and devices for maintaining the rack and pinion out of driving relationship with said indicator during the return movement of the rack.

2. A re-setting apparatus for a dispensing indicator driven through a first friction clutch, comprising a re-setting element and means for moving the same, a second friction clutch for connecting the same to the indicator whereby to effect a re-setting during movement of said element in one direction with slippage in said first clutch, and means for limiting the re-setting movement of said indicator, said second clutch yielding to permit a complete stroke of said element after said limit means has operated.

3. A re-setting apparatus for a dispensing indicator driven through a first friction clutch, comprising a re-setting mechanism including a rack and means for reciprocating the same, a pinion in the path of the rack and moved thereby during the re-setting stroke, means including a second friction clutch for connecting the pinion to said indicator whereby to eiiect a re-setting with slippage in said'first clutch during movement of said element in one direction, means for limiting the resetting movement of said indicator, said second clutch yielding to permit a complete stroke of said element after said limit means has operated, and means for preventing a retardation of the indicator when driven through said first clutch due to engagement of said rack and pinion.

' 4. A re-setting app ratus for a dispensing indicator, comprising a pivoted rack and means for reciprocating the same, a pinion located in the path of the rack during the re-setting stroke and connected with the indicator to re-set the same, means actuated with the rack and operating at the end of its re-setting stroke for rocking the rack out of position to engage the pinion during the return stroke and operating thereafter to maintain the disengagement during the return stroke, .and means actuated with the rack to eflect the rocking of the rack back into pinionengageable position at the end of the return stroke.

5. A 're-setting apparatus for a dispensing indicator, comprising a pivoted rack and means for.

maintain the rack free of engagement with thepinion and in collapsed position to permit such engagement, and lugs moved with the rack to actuate the links into extended position at the end of the re-setting stroke and into collapsed position at the end of the return stroke.

6. A re-setting apparatus for a dispensing indicator, comprising a pivoted rack and means for reciprocating the same. a pinion located in the path of the rack during the re-setting stroke and connected with the indicator to re-set the same, spring means for urging the rack into engagement with the pinion, means actuated with the rack and operating at the end of its re-setting stroke for rocking the rack out of position to engage the pinion during the return stroke and operating thereafter to maintain the disengagement during the return stroke, and means actuated with the rack to effect the rocking oi the rack back into pinion-engageable position at the end of the return stroke.

'7. A re-setting apparatus for a dispensing indicator, comprising a pivoted rack and means for reciprocating the same, a pinion located in the path of the rack during the re-setting stroke and connected with the indicator to re-set the same, a spring-actuated lever acting by rocking movement in one direction upon the rack to urge it resiliently into engagement with the pinion and operating upon rocking movement of the lever in the other direction to disengage the rack from the pinion, a frame, toggle links pivoted to said frame and lever and operative in extended position to maintain the rack free of engagement with the pinion and in collapsed position to permit such engagement, and lugs moved with the rack to actuate the'links into extended position at the end of the re-setting stroke and into collapsed position at the end of the return stroke.

8. A re-setting apparatus for the dispensing indicator of a dispensing structure, comprising a rack and means for reciprocating the same, a pinion which 'may be engaged. and rotated by the rack during reciprocation, a, rotatable member connectedto the indicator and a friction clutch for connecting the pinion and member.

9. A re-setting apparatus for the dispensing indicator of a liquid dispensing structure having a liquid pump, comprising a cylinder and piston, means for delivering liquid from said pump into said cylinder to move said piston relative to the cylinder, and means operated by the said relative movement for re-setting said indicator.

10. An apparatus as in claim 9, in which said re-setting means includes a rack connected for movement with said piston, and a pinion which is rotated by said rack and is connected to the indicator.

11. An apparatus as in claim 9, in which said re-setting means includes a rack connected for movement with said piston,v a pinion which is rotated by saidrack, a rotatable member connected to the indicator, and a friction clutch for connecting said pinion and rotatable member.

12. An apparatus as in claim 9, in which said re-setting means, includes a rack having a limited number of teeth and a flat at one end of the toothed portion, a pinion connected to the indicator and free to rotate with the indicator when said flat is opposite it, said piston operating to move said rack for rotating said pinion to re-set the indicator and to move the rack until said fiat is opposite the pinion.

13. A re-setting apparatus for the dispensing indicator of a dispensing structure, comprising a rack system including a rack having a limited number of teeth, means for reciprocating 1 the rack by a distance greater than the number of teeth, a pinion which may be engaged and rotated by the rack during reciprocation, and means operated by the pinion for re-setting the indicator, and means included in said rack system for freeing said rack at the end of its stroke from the pinion whereby said pinion is free to rotate with the indicator.

14. A re-setting apparatus for the dispensing indicator of a dispensing apparatus, comprising a rack having a limited number of teeth, a member providing a pivotal support for said rack, means for reciprocating said member and rack a distance greater than the toothed. length of the rack, a pinion which may be engaged and rotated by the rack during reciprocation, and resilient means for holding, said rack engaged with saidpinion while in mesh therewith and permitting a yielding rocking movement of the rack whereby a correct meshing may be accomplished.

15. A re-setting apparatus for the dispensing indicator of a liquid dispensing structure having a liquid pump, comprising a cylinder and piston, means for providing a passage from one face of the piston to the other, means for delivering liquid from said pump into said cylinder against one side of said piston to move said piston relative to said cylinder, valve means operated by differential liquid pressure between the faces of the piston for shutting off flow through said passage, means operated by the piston in its relative movement for re-setting said indicator, conduit means for permitting the escape of liquid from the other face of said piston, and means for returning said piston relative to said cylinder when the delivery is shut oil.

16. An apparatus as in claim 15, in which said re-setting means includes a rack having a limited number of teeth and flats at each end of the toothed portion, a pinion free to move with the indicator when either of said flats is opposite it, said piston operating to move said rack for rotating said pinion to re-set the indicator and to move the rack until one said flat is opposite the pinion whereby the pinion is free'to move it the rack is not returned, a rotatable member connected to the indicator, and means for ei- Iecting the return of the rack into a position with said other flat opposite said pinion and without actuating said member.

17. A re-setting apparatus for the dispensing indicator of a dispensing structure, comprising a cylinder, an apertured piston, a valve cage on said piston, a valve supported by said cage normally out of closing relation with the aperture, means for creating a differential oi'pressure at the faces of the piston whereby tohold said valve in closingrelation to the aperture, meansactuated by the piston during its movement in response to the pressure differential for re-setting the indicator, saidball returning to non-closing position upon cessation of the pressure differential, and means to return the piston upon cessation-oi the pressure differential.

18. An apparatus as in claim 17, in which means are provided for raising the valve into proximity with the aperture as the piston returns irom itsre-setting movement.

19. The combination with dispensing apparatus for liquids including a device for delivering liquid under pressure and means for controlling said delivery, a discharge conduit, a meter and a discharge valve in said conduit, and an indicator connected to said meter, or means operated by the liquid under pressure tor reior closing the conduit and located at the dissetting the indicator when said control means has been operated to cause liquid under pressure to flow toward said valve.

20. The combination with dispensing apparatus for liquids,.comprising a pump system including a power driven pump for delivering the liquid under pressure, means for controlling the supply of power to said system, a discharge conduit, a meter connected in said conduit, a valve charge end thereof, and an indicator connected to said meter, of means operated by the liquid under pressure for re-setting the indicator when said control means has been operated to supply power to said pump system. v

21. The combination with dispensing apparatus for liquids comprising a discharge conduit, a meter in said conduit, a discharge valve adjacent the outlet of the conduit, and an indicator connected to said meter, of means operative only when liquid under pressure is present in said discharge conduit for resetting said indicator. 2 2. The combination with dispensing apparatus for liquids comprising a discharge conduit, a meter in said conduit, a discharge valve adjacent the outlet of said conduit, and an indicator connected to said meter, of means operative when and only when liquid under pressure is present in said discharge conduit for resetting said indicator, and means for returning said resetting means to initial position when there is no longer liquid under a predetermined pressure in said conduit.

23. The combination with dispensing apparatus comprising a pump, a discharge conduit from said pump including a portion of capacity varying with the liquid pressure, a meter on said conduit, a discharge valve located at the outlet end of said variable capacity portion, and an indicator connected to said meter, of means operative only after said pump has supplied liquid under pressure to said discharge conduit for resetting said indicator.

24. The combination with dispensing apparatus comprising a power-driven pump, a discharge conduit from said pump including a por- .tion of capacity varying with the liquid pressure, a meter between said pump and portion, a discharge valve located at the outlet end of said variable capacity portion, and an indicator connected to said meter, of means operative only upon movement of said pump for resetting said indicator.

25. The combination with dispensing apparatus for liquids including a discharge conduit, 9.. meter for determining the flow through said conduit, a discharge valve at the outlet end of said conduit, and an indicator connected to said meter, or means operative only when liquid un- 188 der pressure is present in sa d conduit (or resetting said indicator.

26. The combination with dispensing apparatus for liquids including a discharge conduit,

a meterior determining the flow through said conduit, a discharge valve at the outlet end 0! said conduit, and an indicator connected to said meter, or means operative only when liquid is under pressure in said conduit for resetting said indicator, and means for returning said reset- 1 JAMES M. DAYTON.

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