US2712884A - Dispensing pump reset mechanism - Google Patents

Description

July l2, 1955 B. w. Foss DISPENSING PUMP RESET MECHANISM 4 Sheets-Sheet'. l

Filed Dec. 9, 1948 IN VEN TOR.

.Jggs M July 12, 1955 B. w. Foss DISPENSING PUMP RESET MECHANISM INVENTOR.

j??? m @M4/m Filed Dec. 9, 1948 July 12, 1955 B. w. Foss DISFENSING PUMP RESET MECHANISM INVENTOR. wzz dJ/@T 4 Sheets-Sheet 3 Filed Dec. 9, 1948 United States Patent O DISPENSING PUMP RESET MECHANISM Burdette W. Foss, Fort `Wayne, Ind., assignor to Tokheim Corporation, a corporation of Indiana Application December 9, 1948, Serial No. 64,397

17 Claims. (Cl. 222-2) rl`his invention relates to power reset mechanisms for dispensing apparatus or pumps, particularly for use in the dispensing of gasoline and the like. More specifically, the invention concerns hydraulically operated power reset mechanisms, and means for insuring the proper operating sequences and functioning thereof.

ln the use of registering gasoline dispensing pumps, it is customary to effect the resetting of the register after each dispensing operation, such resetting preferably being elected immediately prior to the ensuing dispensing cycle. In my prior Patent No. 2,289,003, dated July 7, 1942, and entitled Automatic Reset Device for Computers, means are disclosed whereby the register reset operations may be eected hydraulically, by means of iluid pressure generated by the pressure pump forming a part of the dispensing apparatus. In the copending Iapplication of Hill and Foss, Serial No. 731,636, filed February 28, 1947, now Patent No. 2,595,259, and entitled Resetting Mechanism for Gasoline Dispensing Pumps, means are set forth for facilitating the proper functioning of hydraulically operated power resetting mechanisms. The present invention sets forth further improvements upon the prior devices, and concerns means and apparatus for precluding improper functioning, and for insuring proper automatic functioning in `a desired cycle and sequence.

It is accordingly an object of the present invention to provide an improved power reset mechanism for liquid dispensing apparatus, particularly of the hydraulically actuated type.

More specifically stated, it is an object of the present invention to provide an improved hydraulic reset mechanism for gasoline dispensing apparatus, wherein the performance of a predetermined automatic cycle and sequence in the operation of the parts is facilitated, and certain dii'liculties heretofore encountered in the operation of apparatus of the type dened overcome.

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

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

Fig. l is a general assembly view, partly diagrammatic in form, of a gasoline dispensing apparatus incorporating a hydraulic reset mechanism constructed in accordance with and embodying the principles of the present invention, in accordance with one preferred embodiment thereof;

Fig. 2 is an enlarged detail view of the power mechanism for the reset forming a part of the structure of Fig. l and taken as indicated by the line 2-2 thereof;

Fig. 3 is a further enlarged detail View of a part of the structure of Fig. 2, on the line 3 3 thereof;

Fig. 4 is a detail perspective of the latch member shown in Fig. 3;

Fig. 5 is a detail view of the air separator mechanism forming a part of the structure of Fig. 1;

2,712,884 Patented July 12, 1955 ICC Fig. 6 is an enlarged sectional view of the power reset mechanism;

Fig. 7 is a detail view of a portion of the structure of Fig. 6, taken as indicated by the line 7-7 thereof;

Fig. 8 is an enlarged transverse sectional View of the clutch, taken as indicated by the line 8-8 of Fig. 7;

Fig. 9 is a vertical sectional view of the clutch, on the line 9 3 of Fig. 8;

Fig. 10 is a detail sectional view of the delivery valve, forming a part of the structure;

Figure l1 is a detail view of the register reset shaft, and an associated control switch, also forming a part of the reset mechnism, the view being taken as indicated by the line 11-11 of Fig. l; and

Fig. 12 is a wiring diagram of the structures illustrated in Figs. 1-11;

Fig. 13 is a View somewhat similar to Fig. 11, but illustrating a modified structural embodiment of the inven tion;

Fig. 14 is a view similar to Fig. 6, but illustrating a further modified structure;

Fig. 15 is a wiring diagram for use with the structure of Fig. 14;

Fig. 16 is a partial view, similar to Fig. 1, but illustrating a still further modied structure;

Fig. l7 is an enlarged detail view of la dash pot mechanism forming a part of the structure of Fig. 16;

Fig. 18 is a schematic or diagrammatic view showing the invention as applied to a dispensing pump installation incorporating coin control; and

Fig. 19 is an electric wiring diagram of the structure indicated in Fig. 18.

Referring more particularly to the drawings, and first to the structural embodiment illustrated in Figs. l-12, in Fig. l there is shown a dispensing apparatus, particularly adapted for the dispensing of gasoline or the like, comprising a casing or housing 1o interconnected by means of a pipe 12 with a suitable source of gasoline storage supply. The pipe 12 leads to a combined pump and air separator mechanism 14, the details of which are shown in Fig. 5 and will be later described. The outlet from the pump leads through a pipe 16 to a meter 13, and thence by a pipe 2t? through a delivery valve 22 and a sight gauge 24 to a flexible hose 26 terminating in a dispensing nozzle 28.

In the operation of the foregoing mechanism, when the pump is in motion and the valve of the dispensing nozzle is open, the gasoline is propelled through the meter, and through the delivery valve 22, the ilexble hose, and the dispensing nozzle, to effect the dispensing operation.

The meter 18 is arranged by means of a drive shaft 32 to effect the operation of a price variator mechanism 34 and an associated register 36, so as to eifect a volumetric and cost registration of the dispensed gasoline, in a manner which will be understood by Vthose familiar with apparatus of the type set forth.

The pump is arranged to be driven by a motor 3S under control of a switch 40, the latter being actuated by means of a push rod 42 from a motor control switch lever 44 associated with the nozzle support hook 46. More particularly, as shown in Figs. l and 2, the pivoted switch lever 44 is secured at one end to a link 46 connected at its upper end to a pivoted lever 48 arranged to actuate the rod 42. The arrangement is such that as the switch lever 44 is raised upon removal of the hose nozzle from its support, the motor switch is closed, the switch being opened upon the lowering of the switch lever as the nozzle is returned to supported position at the end of a dispensing operation.

In accordance with the present invention the register mechanism is reset, by hydraulically actuated power means, at the beginning of and prior to each dispensing operation. As shown in Fig. 5, the pump and air sepa- Y rator mechanism 14 more speciiic'ally comprises a gear Within the separator mechanism there is an air and vapor escape orice 56 leading to a oat chamber 5% having an associated oat 69 and return valve 62, as will be understood. When the pumpris in operation the liquid chamber 64 is under pump pressure, whereas the float ber 5S thereof by means of a pipe 72.Y As shown in Fig.

6, the cylinder 68 encloses a piston 74 normally urged downwardly within the cylinder by means of a compression spring 76. The piston is secured to a rack 7S provided along one side thereof with a series of rack teeth arranged for meshing engagement with a gear 80 secured to a shaft 82 which extends laterally from the hydraulic cylinder and interconnects with the reset mechanism of the register, as will be later described. "it will be seen that at the inception of each dispensing operation,

as the pump is started, liquid under pressure will be forced through pipe 70 into the reset cylinder 68 overcoming the action of spring 76 and causing the piston 74 and rack 78 to move upwardly within the cylinder 68, from the position shown in Fig. 6. At the end of the dispensing operation, when the pump is stopped, the compression spring 76 returns the piston and rack to the position shown in Fig. 6, the escape orifice 56 of the air separator'mechanism 14 functioning to accommodate the liquid gasoline ejected from the reset cylinder 68 during the downward movement of the piston. The conduit 72 functions to return any liquid gasoline which escapes past the piston 74 to the air separator chamber 58. lt

will thus be seen that at the inception of each dispensing.

operation the rack 78 is given an upward stroke of movement, the rack returning at the end of the dispensing operation, when the pump is shut off.

The reset shaft 82 interconnectsrwith the reset shaft 84 of the register by means of a clutch mechanism S6, the details of which are best illustrated in Figs. 7,8 and 9. As shown, shaft S2 has secured thereto a collar S8, Fig. 9, which is in turn fixed to a housing member 90 forming the driving element of the clutch. The clutch driven element comprises a collar 92 loosely journalled on shaft 82 and arranged for driving engagement with the `register reset Vshaft 84. As best shown in Fig. 8, collar 92 is provided with a cam 94 of constantly increasing size, and having a shoulder 96 at a given point along the periphery thereof. A clutch arm 9S is pivotally secured `to housing 90 as indicated at 109 and is provided adjacentV its free end with a roller 102 adapted for cooperation with the surface of cam 94. A tension spring 1%' interconnects between a portion of the housing 90 and the end of' arm 98 so as to maintain the roller 192 in engagement with the cam surface, at predetermined pressure.

In the operation of the parts, as the hydraulically operated Vreset rack 78 is raised a predetermined degree of rotation is imparted to drive shaft 82 which in turn, through the clutch 86, imparts motion to the register reset shaft 84. The register mechanism 36 is preferably of the type currently in commercial use, wherein during the resetting thereof, the register reset shaft partakes of a predetermined degree of movement, approximately l1/s revolutions, whereupon it reaches a positive stop and is then returned by spring mechanism within the register, through approximately 1A; of a revolution. The clutch functions to permit the stopping of the register shaft 34 when the positive register Astop is engaged, and the retrograde movement thereof, to complete the resetting, while the shaft S2 continues its motion in a resetting direction so as to permit a full stroke of operation of the hydraulically propelled reset rack 73. More specifically,

it will be seen that the roller im will drive the cam 94V until the positive stop of the register is engaged where- Se to be arrested and partially returned while motion Yof the reset drive shaft 8-2 continues.

ln accordance with the present invention means is provided for insuring the proper sequence of operation of the parts, notwithstanding the manner in which the switch lever 44 may be manipulated by the operator, and notwithstanding erratic operating conditions which may be encountered in service such for example as temporary interruption of the electric power, or the presence of undue quantities of air within the dispensing line, or the like. Referring to Figs. 2, 6 and 7, it will be seen that the upper end of rack 73 is provided with a cam shaped portion 136 adapted for cooperation with a cap H93 forming a part of a plunger mechanism lwhich cooperates with the motor switch control lever 44. More particularly, cap 193 is screw threaded to a sleeve member 119, the cap and sleeve being reciprocable Vas a unit within suitable bearing Vmeans formed in the cylinder housing 112. A compression spring 114 Y urges the plunger` assembly to the left as seen in Fig.V 6, so as to maintain the cap member ll in constant engagement with the surface of the rack. A plunger pin 116 is' slidably mounted within the sleeve 11i), this pin being normally urged to the right to the limit of its travel within the sleeve by means of a compression spring 116. The projecting end of plunger pin 116 is adapted for cooperation with a latch piece 120, Figs. 6 and 7, having a recess 122, formed therein, and being fixed to one end of a pivot shaft 124 the opposite end of which has fixed thereto the motor control lever 4S, previously described.

lt will be seen that normally, when the reset rack 73 is in the position shown in Fig. 6, the plunger pin 116 is withdrawn sufcientlyv so as to permit the free motion of latch 126 and of the motor lever 48, in either direction. As the lever- 48 is-actuated to energize the motor, latch .20 shifts clockwise, as seen in Fig. 7, to shift the recess 122 away from pin H6, so that as rack 73 is raised as the hydraulic pressure is applied, shifting the cap 16S and the sleeve liti to the right as seen in Fig. 6, the pin 116 engages the surface M6 of latch 12) and is maintained in engagement therewith continuously while the rack ,78 is raised. Should the lever 44 he manipulated to shut oilc the motor, recess 122 is brought into alignment with the pin 116 and latched thereby, so that the motor switch cannot again be operated to closed position until the rack 78 has reached its lower limit of travel. It will thus be seen that after the motor has once been started, if it is shut oli, it cannot again be restarted until the rack 7S has reached its lowermost or home position. By this meaus'it is insured that at the end of a dispensing operation, when the motor is shut off, a new dispensing operation cannot be attempted until-the rack V7S has been completely restored.

Referring to Figs. 2, 3 and 4, latch mechanism is provided for preventing an inadvertent dropping of the rack 7S, in the event of a momentary interruptionrof electric power, or the presence of an excess quantity of air or vapor in the dispensing line, during a dispensing operation. As shown, pivot shaft 1.24 carries atan intermediate pointthereon a latch member 28 which has a lost motion connection with the shaft by means of Va' pin and slot connection. More particularly, shaft 124 has a pin 135` secured therein cooperable with a slot 132 formed in the latch. The lower end of the latch is bifurcated as indicated at 134, the bifurcations being arranged to receive therebetween a plunger pin 136 urged against the surface of the rack 78 by means oi a leaf spring 138. In the normal position of shaft 124, when the motor switch 40 is deenergired, pin 130 is held sufliciently in a counterclockwise position, from the position shown in Fir'. 3, so as to maintain the latch 12S counterclockwise and the plunger pin 136 withdrawn from engagement with the rack. However, as the motor switch is energized pin 13) moves clockwise to the position illustrated in Fig. 3 which releases latch 128 and allows ilexure spring 138 to urge the plunger into engagement with the rack surface; so that when the rack reaches its extreme uppermost position, which condition is depicted in Fig. 3, a recess 140 formed therein comes into alignment with the plunger pin, the plunger pin dropping into the recess to hold the rack elevated until shaft 124 is 2 again shifted counterclockwise as the motor switch 40 is manually deerlergized. Accordingly it will be seen that when the rack has once reached its uppermost position, it is maintained therein, notwithstanding the loss of duid pressure within the hydraulic cylinder 68, until the end of the dispensing operation when the shaft 124 is actuated upon the manual opening of the motor switch. By this means loss of pressure in the hydraulic cylinder, which may occur upon a momentary power failure or upon the presence of excess air in the dispensing line, results in no movement of the racl; 7S from its main' tained uppermost position.

To further insure a proper operating sequence of the reset mechanisms, a control switch structure is provided as illustrated in Figs. l and ll, cooperable with the delivery valve 22. Referring to Fig. ll, a portion of the righthand side wall of the register is illustrated, as seen in Fig. l. The end of the reset shaft, which projects through this wall of the register, is indicated by the reference numeral 84. As previously indicated, the register 36 is preferably of the type now in commercial use with gasoline dispensing apparatus. In such register mechanisms there is secured to the reset shaft a cam disc 142 having a slot cooperable witil a pin 144 acted upon by a tension spring 146 and carried by a cam plate 14S. The arrangement is such that as the reset shaft 34 and the cam disc 142 are rotated, during a resetting operation, a countercloclrwise are of motion of approximately 45 is imparted to the cam plate 148, the cam plate being restored to normal position at the end of the resetting operation by the action of spring 145, and during the 1/s revolution of retrograde movement of the reset shaft S4, previously mentioned.

As shown in Fig. ll, the cam plate 143 is fixed to a shaft which shaft carries an arm 152, the latter being arranged to reciprocate a plunger pin 154 as the cam plate 148 is operated. Plunger 154 cooperates with the actuating arm 156 of an electric switch mechanism 158 disposed within a housing 160, the arrangement being such that as the cam plate is shifted counterclockwise during a resetting operation plunger 154 is actuated to the right to open the electric contacts of switch 153.

The switch 158 is arranged to control the delivery valve 22, previously mentioned, and illustrated in detail in Fig. l0. The valve comprises a casing 162 having a valve member 154 therein, the valve being arranged when open to permit iiow Within the dispensing line 20, as here tofore described. The valve is normally urged into closed position by compression spring 166, and is arranged to be thrust upwardly into open position by a solenoid 163 operable upon an armature 176 formed as a part of the valve stem.

The circuit diagram is illustrated diagrammatically in Fig. l2. It will be seen that the motor control switch 40 is arranged to interconnect the motor 38 between the power lines L1 and L2, in the usual manner so that the lll motor is energized during such time as the switch is closed. It will furthermore be seen that the switch 158 is in series with switch 40, the arrangement being such that the valve solenoid 168 is energized when both switches are closed. As has been described, switch 158 is normally closed, but is maintained open by cam 14S of the register reset mechanism during resetting. Accordingly the delivery valve solenoid cannot be energized to permit dispensing during resetting, but only after the completion 0f the reset when both switches 40 and 158 are closed. By this means if the switch 4i) should be opened, inadvertently or by design, immediately after being closed and prior to the completion of the reset, it will be seen that a dispensing operation cannot be effected until the reset has been completed. If the motor switch is opened very shortly after being closed, and prior to the completion of the reset, rack 78 will be raised a part only of its stroke and then lowered, thus effecting a partial reset of the register. Upon the reclosing of the motor switch 40, and the maintained closing thereof, rack 78 will be raised upwardly through a full stroke of operation. The distance of travel of the rack is such that upon a full stroke of operation thereof more than one revolution of operation is imparted to the register reset mechanism. Thus even though the register may have been partially reset by a partial stroke of operation of the rack, as above, one or two additional full strokes of movement of the rack by the proper manipulation of the motor switch will move the register through zero and then suciently to effect a complete reset. The control switch 158 and the delivery valve 22 insure that a dispensing operation cannot be effected while the register is in a partially reset condition, and prior to the complete resetting thereof.

By reason of the several control devices, thus provided, the proper operation of the hydraulic reset mechanism is insured regardless of how the motor control switch 40 may be manipulated by the operator, and notwithstanding temporary electric current interruptions, excess air in the air separator, or other normally encountered operating conditions.

In Fig. 13 a modilied structure is illustrated wherein the delivery valve, indicated by the reference numeral 22a and corresponding in structure and function to the valve 22 previously described, is mechanically rather than electrically controlled from the reset cam of the register. As illustrated, the rockable reset shaft a, which is shifted counterclockwise through a displacement of approximately 45 during reset, is provided with a cam member 174 secured thereto. This cam cooperates with a pivoted lever 176 arranged to engage the elongated stem 17S of the valve member 164:1, the arrangement being such that the valve is normally open and is lowered to closed position during a resetting operation.

In Figs. 14 and l5 a further modified embodiment is illustrated wherein the delivery valve is mechanically operated by the reset rack, and wherein there is provided a quick acting and slow release solenoid mechanism for controlling the operation of the motor, so as to insure a proper sequence in the actuation of the reset parts.

Referring to Fig. 14, it will be seen that the delivery valve 22b is in this instance located in a position (as indicated in Fig. 16) immediately above the reset cylinder 68h and its associated parts. The rack 78b is so arranged that in its extreme uppermost position it will engage the valve stem 180 of the delivery Valve 164b, and effect the opening thereof. Referring to Fig. l5, the wiring diagram for the arrangement is illustrated wherein the motor is indicated at 38h and the manual motor control switch at 40b as shown. The closing of switch 40h elfects the energization of a quick acting slow release solenoid 182 which in turn is arranged to actuate a switch 184 which when closed energizes the motor 38h.

With the arrangement described even a momentary closing of the motor switch 4% will maintain the solenoid opening thereof, while the rack 7b is raised. The latchV structure of Fig. 3 will also be used in the structural embodiment of Figs. 14 and l5, performing the function of Y maintaining the rack raised during the dispensing operation, notwithstanding excess air in the dispensing ine or momentary electric power failure. When the raclt 13b Visraised, and so long as it is maintained raised to its uppermost position, the delivery valve 1641? is held open so that a dispensing operation can be effected.

In Figs. 16 and 17 a modified arrangement is shown Vfor mechanically elfecting the functions of the solenoid 182 referred to in reference to Figs. 14 and l5. ln Figs. l6 and 17 the physical structures are the same as contemplated in Fig. 14, the only difference being that the motor switch 40C and the associated motor 38C may be directly interconnected (for example as illustrated in Fig. 12) and the functions of the solenoid 182 of Fig. l5 are effected by a mechanical dash pot mechanism generally indicated by the reference numeral 190.

More particularly, referring torFig. 17, it will be seen that this dash pot mechanism comprises a cylinder 192 filled with suitable liquid such as oil, and having a piston 194 reciprocable therein. Y of predetermined size extending therethrough so as to restrict oil flow and limit theY downward motion of the piston under actuation of compression spring 198 to a predetermined slow speed. The piston is further provided with a check valve 260 which permits of a rapid upward movement of the piston as the oil passes therethrough.

`The piston is secured'to a rod 202 which is connected .at

its upper end to the outer portion of a crank 204 forming the switch control arm of the switch stucture 40e. The draw rod 42e is provided with a collar 206 at its lower end, the Vcollar normally being held in engagement with a lug 20S by a compression spring 210, thelug 208 vbeing pivotally mounted on the arm 204 in any suitable manner. Alternatively and preferably, it is preferable not to use spring 198 since the spring 210 will accomplish the same function as spring 198.

In operation, as the rod 42C is raised upon lifting of the hose nozzle motor control lever 44C, the arm 204 is correspondingly lifted thereby, at a permissible rapid rate, to close the motor switch. However, should the .rod 42C immediately thereafter be lowered, the movement of the piston 194 is sufficiently retarded by the oil dash pot action so that the switch 40C remains closed at least suli-A ciently to insure a complete upward stroke of operation of the reset rack.

ln Figs. 18 and 19 an embodiment is illustrated similar to that described in reference to Figs. l-lZ, but wherein the structure is adapted for use with a coin control dispensing installation. In Fig. i8 a pump housing is indicated at 10d functionally similar to the casing and structure 19 previously described, there being, however, a coin .control mechanism 220 associated therewith for controlling the actuation of the dispensing pump under coin -control VThe details of the coin control mechanismV con- V,stitute no part of the present invention, except in so far as they cooperate with the structures thereof, suice to say that the coin unit 220, Fig. 19, includes a switch structure 222 which is closed by the introduction of the coins and Vwhich remains closed until the value of the gasoline represented by the coins deposited hasbeen dispensed, or by returning the nozzle to the hook or support which breaks the current to the motor because of switch 40d at any The piston has an orifice 196 time before the full amount of gasoline is dispensed for f which coins have been deposited. The unused portion of the coins will be returned to the customer.

ln accordance with the present invention the manual motor switch as indicated at 40d is in series with the coin switch 222, the arrangement being such that when both switches are closed the pump motor 38d is energized in a circuit functionally similar to that previously described in reference to Fig. l2. The circuit further includes a control switch 15861 functionally similar to the switch 153, Fig. l2, previously described, the arrangement being such that when all of switches 222, 40d and 158d are closed, the control solenoid 168e' of the delivery valve is energized to open the valve and permit the dispensing of gasoline. In this manner the features of the invention are so combined with the coin control as to permit conjoint control of the delivery valve, without the necessity for duplication of valve structures. Y

It is obvious that various changes may be made in theV the passage of liquid through said line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter and having a reset shaft, hydraulically operable reset mechanism for the register powered by the motor, and means operated by said reset shaft for operating said dispensing control means to prevent dis-k pensing until completion of the operation of the reset mechanism.

2. A liquid dispensing apparatus comprising Va .dis-k pensing line adapted to be connected to a lsource of liquid supply, a valve controlling, dispensing of lliquid from said Vline, a pumpV for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter and having a reset shaft, hydraulically operable reset mechanism Vfor the register powered by the motor, and means on said reset shaft controlled by the resetting of the register for preventing opening the dispensing valve during the operation of the reset mechanism.

3. A liquid dispensing apparatus comprising a dispensing line adapted to be conneted to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter and including hydraulically operable reset mechanism powered by the motor and a member shifted by the register assembly to one position during resetting of the register assembly and to another position upon the completion of the reset, and means controlled by said member for disabling the dispensing apparatus.

4. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled throughY the line, a register operated by the meter, hydraulicallyr operable reset mechanism for the registery powered by the motor, a control member shifted-in` accordance with the movement of the register, and means including a delivery valve in the dispensing line Ycontrolled by said con-4 pensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor and a reset shaft carrying a control member, and means including an electric switch operated by the register assembly control member for disabling the dispensing during the operation of the reset mechamsm.

6. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a moto for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor, a reset shaft, and a control device driven by said shaft, a delivery valve in the dispensing line, and an electric switch operated by the register assembly control device controlling the closing of the valve to prevent dispensing during the operation of the reset mechamsm.

7. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor, a delivery valve in the dispensing line for controlling liquid ow therethrough, a member shifted by the register during resetting, and a mechanical linkage interconnecting said member and valve to maintain the valve closed during register reset operations.

8. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor, said reset mechanism including an actuator shiftable through a predetermined range of movement, a control member mechanically coupled to said reset mechanism, a manual control switch for the motor, a latch controlled by the manual control for the switch for holding the actuator in predetermined position, and means controlled by the register assembly control member for disabling the dispensing apparatus during the resetting thereof.

9. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor, said reset mechanism including an actuator shiftable through a predetermined range of movement, a control member mechanically coupled to said reset mechanism, a manual control switch for the motor, means controlled by the actuator in a given position thereof for disabling the operation of the control switch, and means controlled by the register assembly control member for disabling the dispensing apparatus during the resetting of the register assembly.

10. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, a register assembly operated by the meter including hydraulically operable reset mechanism powered by the motor, said reset mechanism including an actuator shiftable through a predetermined range of movement, a manual control switch for the motor, means controlled by the actuator in a given position thereof for disabling the operation of the control switch, means controlled by the manual control for the switch for latching the actuator in predetermined position, the last named means including a lost motion connection, and means controlled by the register assembly for disabling the dispensing apparatus during the resetting of the register assembly.

ll. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter, hydraulically operable reset mechanism for the register powered by the motor, a control mechanism for the motor, and means for limiting the minimum motor operation when energized whereby to insure a complete operation of the hydraulic reset mechanism.

12. A liquid dispensing apparatus as deiined in claim l1, wherein said limiting means comprises a slow acting electrical relay.

13. A liquid dispensing apparatus as defined in claim l1, wherein said limiting means comprises a mechanical dash pot mechanism.

14. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line,

va register operated by the meter, hydraulically operable reset mechanism for the register powered by the motor, said reset mechanism including an actuator operable through a predetermined stroke of movement, a manual control member for the motor, means controlled by said member for latching the actuator in predetermined position, and means for limiting the minimum energization of the motor whereby to insure a complete stroke of operation of said actuator.

15. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter, hydraulically operable reset mechanism for the register powered by the motor, said reset mechanism including an actuator operable through a given stroke of travel, means for preventing energization of the motor when said actuator is in a predetermined position, and means for limiting the minimum energization of the motor to insure a full stroke of operation of the actuator when the motor is energized.

16. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the pump, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter, hydraulically operable reset mechanism for the register powered by the motor, said reset mechanism including an actuator operable through a given stroke of travel, a manual control member for the motor, means operable by the control member for latching the actuator in predetermined position, means for locking the control member from operation when the actuator is in a predetermined position, and means for limiting the minimum operation of the motor when energized to insure a complete stroke of operation of the actuator.

17. A coin controlled liquid dispensing apparatus, comprising a dispensing line adapted to be connected to a source of liquid supply, a pump for propelling liquid through the dispensing line, a motor for operating the Y 1 1 pump, dispensing control means for'controlling the passage of liquid through said line, a meter operable in accordance with the liquid propelled through the line, a register operated by the meter and having a reset shaft, coin operated mechanism, hydraulically operable reset mechanism for the register, and dispensing control mechanism conjointly controlled by actuation of the coin operated mechanism and by said register reset shaft, said dispensing control mechanism including means controlled by the reset shaft and controlling said dispensing control l means to prevent dispensing until the completion of the operation of the reset mechanism.

References Cited in the le of this patent UNITED STATES PATENTS Alexander July 12, 1932 Goss Apr. 3, 1934 Yeomans Nov. 26, 1940 Foss July 7, 1942 VPressler Nov. 20, 1951 Trexler Apr. 15, 1952 Hill et al May 6, 1952

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