US2592622A - Liquid dispenser with register having dispensing means operative only after a time interval elapses following completed zero setting of register - Google Patents

Description

i 1.952 R. R. TREXLER LIQUID DISPENSER WITH REGISTER, HAVING DISPENSING MEANS OPERATIVE ONLY AFTER A TIME INTERVAL ELAPSES FOLLOWING COMPLETED ZERO SETTING 0F REGISTER 5 Sheets-'Sheet 1 Filed April 3, 1946.

INF wt.

hex/e1 %w/ April 15, 1952 R. R. TREXLER LIQUID DISPENSER WITH REGISTER, HAVING DISPENSING MEANS OPERATIVE ONLY AFTER A TIME INTERVAL ELAPSES FOLLOWING COMPLETED ZERO SETTING OF REGISTER 5 Sheets-Sheet 2 Filed April 3, 1946 4 4 /////II/, 'V/IIIII/l/IIIIIII/II/I 11111111114 EI/I 0 I W l I HI INVENTOR. ,Mfldj 77??2/ BY Wvw,

Apl'll 15, 1952 R ER 2,592,622

LIQUID DISPENSER WITH REGISTER, HAVING DISPENSING MEANS OPERATIVE ONLY AFTER A TIME INTERVAL ELAPSES FOLLOWING COMPLETED ZERO SETTING OF REGISTER Filed April 3, 1946 5 Sheets-Sheet 3 111,.- a k Y IIIIIII 2,592,622 MEANS OPERATIVE ONLY AFTER A TIME INTERVAL ELAPSES FOLLOWING April 15, 1952 R. R TREXLER LIQUID DISPENSER WITH REGISTER, HAVING DISPENSING COMPLETED ZERO SETTING OF REGISTER 5 Sheets-Sheet 4 Filed April 3, 1946 uvvqvron jFezZer Wvw, flA/m/ April 15, 1952 R. R. TREXLER 2,592,622

LIQUID DISPENSER WITH REGISTER, HAVING DISPENSING MEANS OPERATIVE ONLY AFTER A TIME INTERVAL ELAPSES FOLLOWING COMPLETED ZERO SETTING 0F REGISTER 5 Sheets-Sheet 5 Filed April 3, 1946 mmvron fi'ca rdj Patented Apr. 15, 1952 LIQUID DISPENSER WITH REGISTER HAV- ING DISPENSING MEANS OPERATIVE ONLY AFTER A TlltlE INTERVAL ELAPSES FOLLOWING COMPLETED ZERO SETTING. 1

OF REGISTER- Bichard B. Trexler, Evanston, Ill.

Application April 3, 1946, Serial No. 659,299

20 Claims.

- This invention relates to liquid dispensing apparatus, particularly of the type employed for dispensing gasoline and the like for internal combustion engine use.

It is an object of the invention to provide an apparatus of the foregoing type, of improved construction and improved operating characteristics.

More specifically stated, it is an object of the present invention to provide in apparatus of the type set forth, improved means and methods for effecting the resetting of the register mechanism or mechanisms to zero position as an incident to and prior to the beginning of each dispensing operation.

Various more specific objects, advantages and features of the invention will appear from the following specification. when taken in connection with the accompanying drawings, wherein certain preferred embodiments of the invention are set forth for purposes of illustration.

In the drawings, wherein like reference numerals refer to like parts throughout:

Fig. 1 is a general assembly view, with parts broken away for clarity, of a liquid dispensing apparatus constructed in accordance with and embodying the principles of the invention, in

accordance with one preferred embodiment thereof;

Fig. 2 is a detail view of a part of the register resetting mechanism, employed in the structure of Fig. 1;

Fig. 3 is an enlarged sectional view of a part of the structure of Fig. 2, on the line 3-! thereof;

- ture of Fig. 1;

Fig. 5 is an enlarged detail view of the delivery valve forming a part of the structure of Fig. 4;

Fig. 6 is a partial view of a modified structure for eifecting the resetting of the register, by hydraulic actuation, taken as indicated by the line 5-6 of Fig. 7;

Fig. 7 is an illustrative view showing the mechanism of Fig. 6 and its associated parts;

Fig. 8 is a view generally similar to Fig. 6, but illustrating a further modified arrangement;

Figs. 9 and 10 are illustrative views indicating the principles of the invention as applied to mechanical and electrical resetting arrangements, respectively;

Fig. 11 is a general assembly view of an apparatus constructed in accordance with the principles of the invention, and embodying a mechanical resetting arrangement;

2 i a detail illustrative view of the reapplied to the resetting of other types of register mechanisms, and in other forms of apparatus, within the scope of the appended claims.

Referring more specifically to the drawings,

and first to the structural embodiment illustrated in Figs. 1-5, the structure shown comprises the usual underground storage tank ll, Fig. 1, containing a body of gasoline I! to be dispensed. A pipe ll having a foot valve 16 feeds the gasoline from the underground tank to the dispensing apparatus enclosed within the usual housing I8, as shown.

More specifically, the dispensing apparatus comprises a motor II, the starting switch of which is arranged for actuation by the usual hose hook lever 22. The motor is arranged to drive a pump 24, Fig. 4. forming a part of an air separator structure 26. As best shown in Fig. 4, this air separator structure includes a by-pass valve 28 normally spring-urged into closed position by' means of a spring Ill, and arranged to open when a predetermined by-pass pressure has been reached in the chamber 32 on the outlet side of the pump, the pressure in this chamber acting upon the opening piston 34 of the valve. The air separator structure further includes a delivery valve 36 normally spring-urged into closed position by means of a compression spring 38, and adapted to be opened by pressure within the chamber 32 acting upon the valve opening piston 49, when a predetermined opening pressure is reached. The delivery valve is set to open at a pressure somewhat lower than the opening pressure of the by-pass valve, so that normally the by-pass valve only opens to relieve excess pressure within the chamber 32, as for example while the pump is running and the nozzle valve associated with the delivery nozzle 42, Fig. 1, is closed. The foregoing parts, except for the structural arrangements of the delivery valve, are similar to those set forth in Foss Patent 2,289,003, dated July 7, 1942, to which reference may be made for a more detailed description of the operation.

The air eliminator structure further includes a 3 constantly open orifice. communicating between the pressure chamber I2 and a recovery chamber 46. The recovery chamber has a pipe 48 leading to atmosphere so as to eflect the escape of air separated from the gasoline within the air separator structure, and a float 5| controlling a valve I! which eil'ecis .the return of liquid to the intake side .of' the pump, which accumulates beyond a predetermined liquid level within the recovery chamber 48.

The delivery valve 38 communicates with an outlet pipe 54, Figs. 1 and 4, leading to a meter 58, the liquid. then passing from the meter by means of a pipe 58 through a sight glass 68, and thence to the usual flexible dispensing hose 62 and dispensing nozzle 42. to which reference has previously been made.

The meter is arranged to drive a cost register indicated at 64 in Fig. 1, and a volume register it, the drive to the cost register being effected through the action of a change speed gearing or cost variator 68 whereby the unit price of the cost calculations may be varied as required.

As further pointed out in said Foss patent, means is provided in the form of a hydraulic actuatoi' Ill, Figs. 1 and 2, for effecting the resetting of the registers 64 and 66 as an incident to the beginning of each dispensing operation. More particularly, a piston 12 is provided within a cylinder 14 normally spring-urged into its lowermost position as shown in Fig. 2 by means of a compression spring It. The cylinder 14 below the piston communicates by means of a conduit 18 with the pressure chamber 32 of the air separator structure; and above the piston by means of a conduit 80 with the recovery chamber 45.

It will be seen that as pressure is produced within the air separator chamber 32, at the beginning of each dispensing operation, such pressure is transmitted through the conduit 18 so as to raise resetting piston 12 against the action of compression spring 16, whereby to effect the operation of a rack 82 which effects the resetting of the register wheels. More particularly, and as illustrated in Fig. 2, the rack ispivoted upon a shaft 83 and is arranged to be actuated by an arm 84 also pivoted on the shaft and connected to the rack by a latch v85. Arm 84 has an extension 88 pivotally connected to one end of a link 81, the other end of the link being in turn pivotally connected to the rod 88 of the piston 12. At the end oithe dispensing opera= tion, as pressure within chamber 32 is reduced duit 8|! also insuring that the uppermost face oi the piston 12 will be constantly subjected to atmospheric pressure through said recovery chamber 46 and its connection 48 to atmosphere.

The means for effecting the resetting of the registers 64 and 66 upon operation of rack sector 82 is fully set forth in said Foss patent, and in brief comprises'a gear 89 meshing with the rack, said gear being mounted upon a shaft 90 through the intermediary of a series of roller clutches 9|. As best shown in Fig. 3, shaft 90 is connected by means of a link 92 to the reset shaft 94 of the register. The release latch 85, Fig. 2, is provided for disconnecting arm 8% from rack 82 at the end of the resetting operation to accommodate the action of certain shutter mechanism plete its resetting operation. More particularly,

it will be seen that the conduit." is relatively small, so as to impart only a predetermined speed of operation to the piston 12 in its resetting movement; and in certain instances, were the means of the present invention not provided, it may happen that the delivery valve 16 will open and eiiect a partial dispensing of gasoline before the resetting of the registers has been completed. This may occur particularly if the nozzle valve associated with the dispensing nozzle 42 is opened immediately as the pump motor 2G is started.

In accordance with the present invention, and

as best shown in Fig. 5, the actuating piston 49 for the delivery valve 38 is slidably mounted on the valve stem 95 for movement between a pair of stop nuts 98 and I" adiustably mounted upon the threaded upper end portion of the valve stem.

A light compression spring I02 normally holds the valve piston downwardly against the lower stop nut III, as shown. Also, the support member I04 against which the upper end oi! the com pression spring 33 engages, instead of being a lattice or grille, as in the case or the by-pass valve 28, in the case of the delivery valve is a solid plate provided with a bleed orifice N8 of predetermined size.

It will be seen that by reason oi the construction thus provided, as pressure is built up within the air separator pressure chamber 32, this pressure will project liquid through the conduit 18 to the reset piston, and also through the orifice ")5 to efl'ect the actuation of delivery valve piston 49. However, the size of the orifice I88 is so predetermined that the resetting operation shall be completed before the delivery valve piston 40 moves upwardly sumciently to engage the stop nut 98 and efiect the opening oi the delivery valve. By this means a predetermined timed delay is provided in the opening of the delivery valve, insuring that the valve will not open, and liquid be inadvertently dispensed, prior to the completion of the register resetting. As will be understood, any liquid which escapes through the dispensing line prior to the completion of the resetting will result in a loss to the pump operator, which in the ag regate may be considerable.

I! desired to facilitate the quick closing of the delivery valve, an enlarged opening and associ= ated ball check valve may be provided in plate I0 8 permitting downward flow therethrough. Such valve is not shown as ordinarily the orifice 106 will permit sufliciently rapid closing oi the valve. An apertured plate 8, Fig. 5, permits tree communication between the upper side of the piston 40 and the recovery chamber so, as will be understood.

In Figs. 6 and '7 a modified structural arrange ment is illustrated for insuring that the resetting shall be completed before the opening of the die livery valve.

In this instance an air separator 23a is provided, generaly similar to the separator 28 pre= viously described, but modified in certain respects. More particularly, in this instance the conduits I8 and are not provided, and abel lows illl, functionally similar to the piston and be an open grille, as in said Foss patent, the.

control oriflcedll, and its function, being unnecessary. The remaining elements of the air separator structure may be as previously described.

Referring further to Fig. 6, it will be seen that the free end of the bellows is secured to an end plate II4 pinned to an operating rod II6. This operating rod is mounted for reciprocation as the bellows expands and contracts, within a bracket Ill formed as a part of the air separator structure, and a fixed frame bracket I20, as shown. A compression spring I22 bears between the frame bracket and the bellows plate I I4, normally urging the bellows into, its contracted position, as shown in Fig. 6, with the bellows plate in engagement with a pair of stop pins I24.

The rod H6 is pivotally connected to an arm I 26 of a sector member I28 suitably pivoted upon the apparatus frame, as indicated at I30. This sector has a cam slot formed therein consisting of an inner portion I32 concentric to the pivot I30, an outer portion I34 also concentric to the pivot, and a rise portion I36 therebetween. An upstanding rod I30 journalled for reciprocation within a frame bracket I40 has its lowermost end I42 turned at right angles so as to project into the cam slot of the sector. As shown in Fig. 7, the upper end of rod I30 is pivotally connected to and arranged to actuate a lever I44, pivotally mounted upon the frame as indicated at I46, and in turn pivotally connected to a rod I48 connected to the lower end of the link 01 previously described.

It will be seen that by reason of the connections provided, as the bellows is expanded, by the introduction of pressure into the pressure chamber 32 of the air separator, the outward movement of rod II6 will actuate the sector and cause downward movement of the rod- I38 by reason of its connection with the cam slot. Such downward rod movement produces upward movement of the link 01 to efiect the resetting operation of the register, as previously described. The lever I44 effects the necessary magniflction of movement, and the cam slot consisting of the concentric portions I32 and I34 and the rise portion I36, provides that the movement of the re-- setting mechanism may be gradually accelerated from rest, and then gradually again slowed down to a stopped position. By this means a rapid operation of the resetting mechanism may be effected without shock to the parts.

The bellows III, being in unrestricted communication with the air separator pressure chamber 32 through the relatively large fluid passages as indicated at I50, Fig. 6, will absorb the pressure from the pressure chamber, without danger that the delivery valve may open before the resetting mechanism has completed its operation. More particularly, the combined resistance of the spring I 22 and the resiliency of the bellows is less than the resistance of delivery valve spring 33 so that the bellows operates first as pressure builds up within chamber 32, and the unrestricted flow communication between the bellows and the chamber 32 permits the bellows to absorb the pump delivery sufficiently so that the bellows'completes its movement before pressure within chamber 32 can build up sumciently to open the delivery valve. It will of course be understood that the delay mechanism of Fig. 5 can, if desired. be provided for use with the structures of Figs. 6 andl, but ordinarily is not required.

In Fig. 8 a structural embodiment of the invention is illustrated which is the same as Figs. 6 and '7, except that additional means is provided for precluding the opening of the delivery valve unless and until the resetting mechanism for the register has completed its operation.

As shown, the bellows operating rod Il ib is in this instance extended into the pressure chamber 32 of the air separator structure, generally indicated by the reference numeral 26b, for pivotal connection with one end of a lever I52 pivotally mounted upon a bracket in the air eliminator chamber, as indicated at I54. The lower end of this lever has a pin I66 engageable with a vertical slot in a connector pin member I53. This pin member projects through a suitable slot in the delivery valve cage I60 for movement within aligned bores extending through the delivery valve 36b and the delivery valve stem 36!). The

operating piston 40b is rigidly fixed to the valve stem. A relatively light compression spring I62 bears between a valve member 361) and the grille I042), whereas a relatively heavier compression spring I64 bears between the piston 40b and thegrille I 66 communicating with the recovery chamber- 46.

In operation, normally the springs I62 and I64 hold the valve and valve stem in their lowermost or seated positions as shown in Fig. 8. Upon introduction of pressure into the chamber 32, the spring I22 for the reset bellows yields first, as previously described. The leftward movement of the rod IISb causes connector pin I58 to be projected to the right connecting the valve member 36b with its stem 06b so that upon subsequent actuation of the piston 40b, as pressure: within chamber 32 increases, the valve stem will effect the lifting of the valve. However, should the valve stem tend to move before completion of the register reset, the pin I56 will be in its unactuated or leftward position as shown in Fig. 8, so that upward movement of the valve stem 96b will not raise the delivery valve, the valve: merely being held in seated position by its relatively light spring I62. It will be seen that means is thus provided for precluding the opening of the delivery valve unless and until an adequate movement of the register resetting mechanism has been effected.

In Figs. 1l16 a modified structural embodiment of the invention is illustrated wherein mechanical as distinguished fromhydraulic means is provided for effecting the register reset prior to the beginning of the dispensing operation.

A supply pipe 200 having a foot valve 242 leads from an underground gasoline supply tank 204 to a pump structure 206 arranged within the housing 208 of the dispensing apparatus. The

pump is adapted to be driven by an electric motor 2I0 by means of drive connections generally indicated by the numeral 2 I 2, which will be presently described. A spring pressure relief valve 2 is provided for by-passing the delivery of the pump when the dispensing nozzle is closed, as in the embodimentpreviously described.

An outlet conduit 2I6 leads from the pump to an air separator 2 I8 of any suitable construction.

An outlet pipe 220 leads from the air separator tea meter as shown at 222, there being a delivery valve 2" disposed in the pipe which is opened when a predetermined pressure within the air separator has been reached. An outlet pipe 222 leads from the meter through a sight gauge 222 to a, flexible hose structure as indicated at- 222 and. a nozzle structure 222 having the usual manually operated nozzle control valve.

The meter is arranged to drive a volume register 222 and a cost regi ter 224, the drive to the cost register passing through a price variator as indicated at 222, as in the previously described structure.

The energization of the motor is controlled by a switch 222, actuated from the nozzle support lever 222, in the usual manner.

The drive connections between the pump and for effecting the resetting of the registers as an incident to the beginning of a dispensing operation, are best illustrated in Fig. 12. As shown,

the drive connections between the pump and motor comprise a shaft 222 geared to the motor and a shaft 222 geared to the pump. Shaft 222 is provided with an extension 222 projecting into a receiving opening in the shaft 244, the arrangement being such that the shafts are maintained in axial alignment. but are permitted to rotate a predetermined amount relative to each other and also to rotate together as a unit within their associated bearing structures 222 and 222.

The means for predetermining the relative rotation between the shafts comprises a torsion spring 252 one end of which is connected to the shaft 222 and the other end of which is connected to the shait 2136.

A collar 252 is arranged for slldable movement along the outer surface of the shaft 222, the collar being provided with a pin 222 projecting through a slot 222 formed longitudinally in shaft 222 and into engagement with the helical screw thread 222 formed on the surface of the extension 242 of shaft 222.

It will be seen that by reason of the construction provided, as the motor 212 is energized at the beginning of the dispensing operation, a predetermined relative rotation takes place between shafts 222 and 2 before they begin rotation as a unit to drive the pump, the amount of the relative rotation being determined by the spring 252 as it absorbs the driving torque. This relative rotation of the shafts projects the collar 222 longitudinally, to the left as seen in Fig. 12, a predetermined distance.

A yoke 282, suitably pivoted to the frame as indicated at 226, is connected to the collar 222 .through an antifriction bearing 222. The yoke is also connected to a link 228 having a pin and slot connection with a cam slot sector member 212 functionally similar to the sector I28 previously described. The sector has a pair of concentric slot portions 212 and 212 connected by an intermediate rise portion, as previouslydescribed. An upstanding rod 212 is arranged for operation by the cam slot, as in the case of the previously described rod I22.

It will be seen that as the collar 252 is projected to the left, as seen in Fig. l2.rod 212 will be raised. This rod movement may be employed to effect the resetting of any selected register structure, for example, as in the Foss patent previously referred to. In Figs. 13-16 one suitable and preferred form of register is set forth, and will now be described.

As shown in Figs. 12 and 13, the upper end of pair of pivoted sectors 212 and 222. Sector 212 is provided with a toothed portion 222 and a nonthe motor. and the means incorporated therein rod m is bifurcated and arranged to operate a toother portion 282 cooperable with a gear 222 secured to one end of'a common notched reset shaft 222 upon which the wheels of both the volume register 222 and the cost register 222 are I mounted.

As best shown in Figs. 15 and i6. shaft 222 is provided with a reset notch rimning along its length cooperable with a series of spring-pressed pawls 222 carried by each of the register wheels 2" in such a manner that as the shaft is rotated in a counterclockwise direction as seen in Fig. 15. the register wheels will be picked up and restored counterclockwise to zero position, or in the same direction in which the register wheels are driven by the drive connections 222 and 222 from the meter. The toothed portion 222 of sector 212 is of suilicient length so that slightly in excess of one revolution is imparted to the reset shaft 222, upon each operation of the sector. The positioning of the pawls 282 upon the register wheels is such that the wheels will be moved to zero position as the shaft 228 completes its resetting movement. 1

The lowest order register wheel has frictlonally mounted thereon a drive gear 222 in geared engagement with the meter drive connections, whereas the higher order register wheels similar- 1y are provided with drive gears 222 frictionally mounted thereon. and adapted to be driven by Geneva gears 222 of a standard Geneva transfer mechanism. As will be understood, the Geneva gears 282 are cooperable with and driven from Geneva cams 282 formed as a part of each of the register wheels.

To prevent overthrow of the register wheels, as they are reset to zero position, each wheel is provided with a cam 222 from which laterally projects a pin 222 cooperable with a stop or overthrow preventing pawl 222, the latter pawls be ing fixed to a shaft 222 extending longitudinally of the register mechanism. The end of this shaft carries a pawl 322 cooperable with a cam 20%? ar cam sector 228 is provided with a notched or recessed portion 2l2 at a predetermined point thereon, the arrangement being such that as the register wheels reach zero position in their resetting movement, the pawl 228 drops into the recess 2l2 under the urging action of a spring 2H. whereby to move the stop pawls 222 com-- terclockwise as seen in Fig. 15 into position to be engaged by the numeral wheel pins 222. Continued movement of the cam 228 moves the pawl 228 away from the recess 2|2 and onto the higher cam surface 2 i 2 to again withdraw the stop pawls 222 from blocking position. During this latter movement of the cam 222 the non-toothed portion 222 of sector 218 is in operative juxtaposition to the gear 282 so that the reset shaft 288 is not operated.

As will be understood, the foregoing resetting movements are imparted to the register each time the drive motor 2! of the apparatus is energized, to begin a dispensing operation. At the end of the dispensing operation, as the spring 252 is restored to normal relaxed position, rod 212 is restored downwardly, returning the resetting mechanism to normal position. A series of pawl detents 2i8, Figs. 13 and 15, are urged individually into engagement with the register wheel cams 288 by means of Springs 222, so as to 9 aid in properly aligning the register wheels with the sight windows 332 provided in the casing structure.

Due to the insured and rapid operation of the register wheels upon resetting, shutter mechanisms ordinarily required in the case of forward resetting are not necessary. Furthermore, while the resetting operations are rapid. the shaping of the cam slot in the sector Ill, and the overthrow preventing devices ill-3" insure a smooth resetting movement of the register wheels, without dan er of overthrow.

Referring further toFig. 12, if desired, the sector I'll may be provided with a series of ratchet teeth 33! cooperablc with a. controlled pawl 336 normally urged by a spring 32! away from the sector but adapted to be projected by a solenoid 33' against the action of the spring into engagement with the sector surface. The solenoid 330 may, for example, be arranged in series in the energizing circuit for the motor. By this means return movement of the sector ii" is prevented. until the motor is deenergized, regardless of variations in the loading of the pump 205 which might produce slight variations in the positioning between the shafts m and 2 during a dispensing operation. Ordinarily such variations are slight and are compensated for by the concentric portion 312 of the cam slot in sector 2", so that slight movements of the sector I'll produce no corresponding movement of the rod 216. Use of the pawl 325 'is accordingly optional in this, or in other forms of the invention. A safety spring 332 cooperates with the pawl 326 to per-- mil: 9. restoring movement of the collar 25! in the event, for one reason or another, that the sector 2" might be held by the pawl 325 from its corresponding restoring motion.

By predetermining the strength of the spring 252, it is insured that the resetting will be completed before any fluid dispensing movement of the pump, and the building up of sufficient pressure to open the delivery valve 2 i 8.

In Fig. 10 an arrangement is disclosed for electrically effecting the resetting of the register as an incident to the beginning of each dispensing be closed upon the lifting of the hose nozzle 2",

In Fig. 9 a modified mechanical drive arrange- I ment for effecting movement of the resetting mechanism is shown. In this instance the motor 2! and the pump 2" are interconnected as before by means of shafts 242a and la, and the interconnected drive spring 252. However, in

this instance the shaft extension 245a is nonthreaded, and a different means is employed responsive to relative motion between the shafts 242a and la to effect operation of the resetting mechanism.

More particularly, as shown in Fig. 9, a gear 340 is secured to shaft 242a, which gear, through the intermediary of a gear 312, and a reversing bevel gearing an is arranged to drive one side gear 345 of a differential gearing generally indicated by the numeral 348. The other side gear 35' of the differential is arranged to be driven from the shaft 244a through the intermediary of gears 352 and 35!. The cage 356 of the differential mechanism is provided with a gear 368 which by means of a ear 352 and gearing 3 is arranged to drive a gear 366 meshing with a rack 353 functionally similar to the link 25!; previously described in reference to Fig. 12.

It will be seen that any relative movement between shaits 242a and la will produce a corresponding movement of diilerential gear 350 and the rack 338. This movement which occurs at the beginning and end of each dispensing operation, as previously described, is employed to eiiect the register reset.

the switch being arranged when closed to eflect the simultaneous energization of a solenoid 382 and a solenoid 3" in a control circuit leading from the power lines L1 and La. Solenoid 382 is rapid acting and operates immediately as the solenoid is energized through a rack and. sector 286, and link 28!, to raise rod "in and effect the register reset, as previously described. Solenoid 384 is slow acting, and after a predetermined timed delay, sufiicient to permit the completion of the register reset, its energization clients the closing of a switch 306 whereby to close a power circuit from the lines'LlLa to the drive motor ill.

It is obvious that various changes may be made in the specific embodiments set forth without departing from the spirit of the invention The invention is accordingly not to be limited to the precise embodiments shown and described, but only as indicated in the following claims.

The invention is hereby claimed as follows:

1. A liquid. dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for efiecting the operation of the register resetting means and the liquid flow control means in response to actuation of said pressure establishing means, said common control means'including mechanism for shooting the operation of the flow control means in predetermined timed relation to the completion of the operation of the register resetting means.

2. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure'on liquid in said line, means for controlling the iiow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for eiiecting the operation of the register resetting means and the liquid flow control means in response to actuation of said pressure establishing means, said common control means including mechanism for initiating the effective operation of the flow control means a, predetermined time after the completion of the operation of the register resetting means.

3. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, positive resetting means for the register mechanism, and common control means for effecting the operation of the register resetting means and the liquid flow control means, said common control means including mechanism for simultaneously moving the flow control means and the register resetting means, and for delaying the effective operation of the flow control means I 11 2 until alter the completion of the effective operation of the register resettingmeans.

4. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to .a

source of liquid supply, means for controlling the flow of liquid through the dispensing line. re ter mechanism operable in accordance with the flow of liquid through the dispensing line, posipressures. and means substantially independen or a pressure drop from said line to said resetting, actuator for insuring a predetermined tive resetting means for the register mechanism,

and common. control means for. effecting the operation of the register resetting means and the liquid flow control means, said common control means including hydraulic mechanism for initiating the effective operation of the flow control means a predetermined time after the completion orthe operation of the register resetting means. r

5. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means including a deliv- 6. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means including a delivery valve for controlling the flowv of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the'dispensing line, resetting means for timed delay between operation or said actuators. 9. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means including a higher pressure hydraulic actuator for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the now of liquid through the dispensing line, re-

setting means including a lower pressure hydraulic actuator for resetting the register mechanism, and common control means including a source or liquid pressure ior electing the operation of said hydraulic actuators, said hydraulic actuators being operable at diiierent pressures, and the lower pressure hydraulic actuator being in juxtaposition to-said pressure source providing unrestricted connections between the lowerpressure actuator and the pressure source so as to preclude the building up oi pressure due to such connections during the operation or said lower pressure actuator.

10. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line,-reset .ting means for the register mechanism, and

power connections for effecting the operation of the register resetting means and the liquid flow control means in predetermined timed relation, said connections including means-iormoving the register during resetting at a progressively increasing rate of speed until a maximum speed the register mechanism, and common control means for eflecting the operation of the register resetting means and said delivery valve, said common control means including a lost motion connection and a fluid control orifice for efiecting the opening of thedelivery valve a predeterminedtime after the completion of the operation of the register resetting means.

7. A- liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line, means for controlling the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for effecting the operation of the register resetting means and the liquid flow control means,.said common control means including hydraulic mechanism responsive to pressures established in at least part of said line for effecting the operation of the flow control means a predetermined time after completion of the operation of the register resetting means.

B. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line, means including a hydraulic actuator for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resettin means including a hydraulic actuator for resetting the register mechanism in response to pressure established in at least a part or said line,

of operation has been reached and thereafter at a progressively decreasing rate of speed.

11. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for eiiecting the operation of the register resetting means and the liquid flow control means in response to actuation of said pressure establishing means, said control means including a latching mechanism controlled by the action oi the resetting means for precluding efiective operation oi the flow control means until after the completion of the operation of the register resetting means.

12. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line, means including a delivery valve for controlling the flow of liquid through the dispensing operable in accordance with the flow of liquid through the dispensing line. resetting means for the register mechanism, and common control means, for effecting the operation of the register resetting means and said'delivery valve in response to actuation of said pressure establishing means, said control means includin a latching structure controlled by the action of the resetting means for preventing operation of the delivery valve until the completion or the operation of the register resetting means.

13. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a line, register mechanism drive connections between the motor and the pump, register mechanism operable in accordance with the flow of liquid through the dispensing line, positive resetting means for the register mechanism, and common control means powered by said drive connections for effecting the operation of the register resetting means and the liquid flow control means in predetermined timed relation.

14. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing lineincluding a pump, a motor for driving the pump, yieldable drive connections between the motor and the pump, register mechanism operable in accordance with the flow of liquid through the dispensing line, positive resetting means for the register mechanism, and common control means powered by said drive connection for effecting the operation of the flow control means a predetermined time after the operation of the register resetting means.

15. A liquid dispensing apparatus as defined in claim 14, wherein said yieldable drive connections include a shaft connected to the pump. a shaft connected to the motor, and a yieldable drive spring interconnecting said shafts.

16. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for effecting the operation of the register resetting means and the liquid flow control means, said common control means including an electric circuit for energizing the register resetting means, an electric circuit for energizing the flow control means, and means interconnecting with both said circuits controlling the operation thereof to energize the register resetting means and the flow control means in predetermined sequential relation.

17. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for establishing pressure on liquid in said line. means for controlling the ilow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and common control means for eflecting the operation of the register resetting means and the liquid flow control means in response to actuation of said pressure establishing means, said common control means including aslow operating solenoid for effecting the operation of the flow control means a predetermined time after the operation of the register resetting means.

18. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and power means for effecting the operation of the register resetting means and the liquid flow control means in predetermined timed relation, said register resetting means comprising a power operated actuating member, a zero stop for the register, means controlled by the actuating member for moving the zero stop into effective position upon a predetermined movement of the actuating member in a given direction, and means also controlled by the actuating member for withdrawing the zero stop upon a further movement of the actuating member in the same direction.

19. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for controlling the flow of liquid through the dispensing line, register mechanism operable in accordance with the flow of liquid through the dispensing line, resetting means for the register mechanism, and power means for effecting the operation of the register resetting means and the energizing and deenergizing of the liquid flow control means in predetermined relation, said power means including a member engageable with the register wheels to effect the forward resetting thereof as the liquid flow control means is energized, said member being restored to original position upon the deenerglzation of the liquid flow control means.

20. A liquid dispensing apparatus comprising a, dispensing line adapted to be connected to a source of liquid supply, and means for controlling the flow of liquid through the dispensing line, said means comprising a delivery valve, a piston for operating the delivery valve, a detachable connection between said pistons and said valve connected after a first predetermined timed delay, a lost motion connection between the delivery valve and piston whereby to effect a second predetermined timed delay in the operation of the valve after the actuation of the piston.

RICHARD R. 'I'REXLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,999,697 Kleckner et al. Apr. 30. 1935 2,028,102 (loss at al Jan. 14, 1938 2,074,292 Wilkins Mar. 16. 1937 2,084,288 Holley et al. June 14, 1937 2,173,477 Goss Sept. 19, 1939 2,289,003 Foss July 7, 1942

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