US2679308A

US2679308A - Coin-controlled dispensing pump

Info

Publication number: US2679308A
Application number: US646324A
Authority: US
Inventors: Moore James Ballard; Curtis F Prangley
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-02-08
Filing date: 1946-02-08
Publication date: 1954-05-25
Anticipated expiration: 1971-05-25

Description

May 25, 1954 J. B. MOORE ETAL COIN CONTROLLED DISPENSING PUMP 4 Sheets-Sheet l Filed Feb. 8, 1946 55559225 I NJ l Cari May 25, 1954 J. B. MooRE ETAL 2,679,308

COIN CONTROLLED DISPENSING PUMP Filed Feb. 8, 1946 4 Sheets-Sheet 2 "so @4 f 294 l @fm M May 25, 1954 J. B. MOORE ETAL.

COIN CONTROLLED DISPENSING PUMP 4 Sheets-Sheet 3 ]derzzm mM/207? ai x7. frm rz @33% mI//@ QQN May 25, 1954 J. B MooRE ETAL 2,679,308

com coNTRoLLED DisPENsING PUMP Filed Feb. 8, 1946 4 Shts-Sheet 4 ik b Patented May 25, 1954 OFFICE COIN-CONTROLLED DISPENSING PUMP James Ballard Moore, Chicago, and Curtis F. Prangley, Winnetka, Ill.

Application February 8, 1946, Serial No. 646,324

4 Claims.

The present invention relates to coin actuated liquid dispensing pumps for petroleum and other products.

Among the objects of the present invention is to provide this type of pump with coin return mechanism in which only after the dispensing is completed and the motor pump switch lever is thrown to inoperative position, are the coin values returned to the operator in accordance with the undispensed gasoline which the operator has previously paid for by depositing coins into the machine.

A further object of the invention resides in providing automatic means for returning these coins to the operator automatically upon the termination oi the dispensing operation and in providing means so that the coins cannot be returned to the operator prior to the Completion of the dispensing operation.

another object of the invention resides in proautoinatic means for setting up the money value oi the coins to be returned after the completion of the dispensing operation and resetting oi" the automatic coin mechanism back to zero position, followed by the subsequent automatic actu tion or" the coin return mechanism to select the proper combinations of coins and discharge 'them or return them to the operator thereafter and in accordance with the coin value of the undispensed gasoiine which the operator had previously paid for by depositing the coins in the i -achine These and other objects of the invention will be apparent from a perusal of the following specification, when taken in connection with the accompany drawings, wherein:

Figure 1 is a front view, partly diagrammatic in form, ci a gasoline dispensing apparatus for coin controlled actuation, and embodying the features of the invention in accordance with one preferred form thereof;

Figure 2 is an enlarged, somewhat diagrammatic view of a portion of the differential drive of Figure l;

Figure 3 is a diagrammatic layout of part of the coin control mechanism showing the coin return control wheel;

Figure 4 is a diagrammatic view of the coin control mechanism and part of the electrical circuits controlled by the same;

Figure 5 is a view .of the friction clutch and part of the switch mechanism operated from one of the sha-its shown in Figure 3;

Figure 6 is an electrical diagrammatic view of the coin changer mechanism and the .coin selector relays and coin return control wheel mechanism;

Figure 7 is a modified type of coin return mechanism showing the relay circuits and coin return control wheel; and

Figure 8 is a view of the gearing required in the modified form of Figure 7, but a similar showing corresponding to Figure 3 of the iirst form.

Referring more specifically to the drawings, in Figure 1 there is set forth for illustrative purposes a gasoline dispensing apparatus of the type which may be employed in gasoline filling stations and the like, arranged for selective coin control actuation. The structure comprises a housing l@ in association with an underground tank i2 provided with the usual supply of gasoline to be dispensed, as indicated at I4. A supply pipe it provided with a `ioot valve I8 at its lower end leads from the underground tank to the inlet of the main dispensing pump 29. The foot valve i8 comprises a check valve for preventing reverse or downward iiow of the gasoline through the pipe i6, as will be understood.

The outlet pipe 22 of the pump leads to an air eliminator 24, which may be of standard design and construction, the air and gas-freed liquid then passing to a meter 26 operated in accordance with the volumetric rate of ow. From the meter the gasoline passes through a delivery valve 28, through the usual sight gauge, as indicated at 30, through a metering valve 3i, and thence through a flexible hose 32, and dispensing nozzle 313, which may be of conventional design and construction. The delivery valve 23 when open permits unrestricted fluid iiow in the dispensing line and when closed stops fluid flow. The metering valve 3l is operative when open to permit lunrestricted fluid ow, and when closed to meter the iow to a predetermined slow rate. The operation of these valves will be later described.

The nozzle 34 is provided with a nozzle valve, as indicated at 36, and with the usual non-drain valve as indicated at 33. As rwill be understood, the non-drain valve is spring urged by a light spring pressure into closed position, sufficient to withstand the weight of the column of liquid within the hose, whereby to prevent draining of the hose, but insuflicient to prevent outward iiow of liquid through the hose under the propelling pressure of the pump 2i) during dispensing operations.

The dispensing pump 20, provided with the usual kley-pass valve 20a is arranged .to be driven through gearing 40 by means of an electric motor 42. The motor is provided with a starting switch 44 actuated by means of a rod 4% operatively connected with the hose hook switch lever 48a of the hose hook 48, the arrangement being such that motor switch et is closed as the hose hook lever is raised after the hose nozzle 34 has been removed from the hose hook. support.

The meter is provided with a drive shaft 50, operated in accordance with the movements of the meter. The meter shaft is arranged to effect the direct drive of the volume register 52, for indicating the volume of the liquid dispensed. The meter shaft is also arranged to effect the driving of a cost register 54, for indicating the cost of the dispensed liquid, the cost register drive being effected through the intermediary of a variator, or change speed gearing adjustable in accordance with unit price, and having the unit price indicator 59. The variator mechanism may, for example, be of the type shown in the patent to Slye et al. No. 2,151,239, the variator cone gearing being indicated diagrammatically at 60. The variator drives the cost register through the intermediary of a shaft 62, which shaft is also connected to the coin control mechanism, as will be presently described.

The volume and cost registers may be reset by means of the resetting crank 64. Also, the structure is preferably provided with interlock mechanism, as indicated at 60 connected with the hose hooi; switch lever 58a and with the register by means of shaft 68 in a manner so that after the hose hook lever has been lowered, and the hose nozzle hung on the hose hook, after a dispensing operation, the hose hook lever cannot again be raised to actuate the switch 44 and start the motor for a subsequent dispensing operation until the registers have been reset to zero, viz., cleared of the registrations from the previous dispensing operation. This register reset and switch interlock mechanism may, for example, be of the type shown in the patent to Bechtold No. 2,108,028.

The coin control mechanism comprises a coin selector, as shown at 10, provided with a slot 12 through which the actuating coins may be introduced, the selector in this particular instance being arranged to receive and separate 50e, 251', 10 and 5e coins, and to eliminate slugs. The selector is provided with the usual separating and slug rejecting devices, and may be of any suitable standard structure. The rejected slugs pass from the selector through a chute 'I4 to a return cup 1B, see Figure 1, whereas the good coins pass through a chute structure 'i8 to a key controlled coin storage box 80, the good coin chute including therein suitable coin switch mechanism 82 actuated by the coins, and later to be described. A window covered register dial 84 and associated pointer 86 are arranged to indicate the money value total of the coins deposited, to effect any given dispensing operation, as will also presently be described.

As best shown in Figure 2, the cost register drive shaft 62 is arranged at its lower end by means of suitable reduction gearing 81 and a pair of bevel gears 88 to effect the drive of a shaft 90 which drives one of the side gears 92 of a differential gearing generally indicated by the numeral 94. The other side gear 06 of the differential gearing is fixed to a shaft 98 which is in turn secured to and adapted to be driven from the ratchet wheel of an accumulator device |02, presently to be described. A spring pressed friction collar mechanism |04 is carried by the shaft 98 and comprises a collar splined to the shaft and spring urged against the housing |05 of the accumulator device, the arrangement being such as to apply a predetermined light frictional resistance to rotation of the shaft 98.

The differential housing |08 carries a ring gear ||0 arranged to drive a shaft ||2. This shaft is arranged by means of gears ||4 and ||6 to drive a shaft I8' shown in enlarged perspective detail in Figure 3. The gear l5 is loosely mounted on the shaft ||8, but is adapted to be frictionally engaged by a collar |20 splined to the shaft, the arrangement thus providing a frictional driving connection between the gear IIS and the shaft ||8; the frictional strength of the device IIS- |20 being greater than the light frictional resistance imparted by the device |04 to the shaft 98.

As will be understood, the dilerential 94 may be of the side gear type, as shown, or the planetary type, as may be desired. Inasmuch as the forces transmitted through the differential are relatively small, relatively light gears such as clock gears may be employed. The differential gears and associated parts are shown relatively large in Figure 2, for illustrative purposes, Figure 2 thus being somewhat diagrammatic in this respect.

Shaft ||8 carries the register pointer 86 at its forward end. At its rear end the shaft carries a switch arm |22 adapted for` cooperation with a contact sector |24. The stop pin |26 limits the retrograde movement of the switch arm and the shaft H8, in the clockwise direction as seen in Figure 3. The shaft also carries a duplicate switch arm |22a cooperable with a sector |24a.

Shaft ||8 also has fixed thereon a gear |28 cooperable with rack |30, the end of which forms the armature of an electromagnet |32, the a-rrangement being such that as the electromagnet |32 is energized the rack |30 is pulled upwardly to rotate the shaft ||8 in a reverse or clock-- wise direction, Figure 3.

The details of the coin switch structure 82 and of the accumulator device |02 are shown in the wiring diagram, Figure 4. It will be seen that a series of switches |34, |36, |38, and |40 are associated, respectively, with the 50, 25e, 10 and 5e chutes from the coin selector 20, these switches being individually and selectively operable by a coin of the associated denomination, as it passes from the-coin selector '|0 through the chute 18 to the coin storage box 80. The switches |34, |36, |38 and |40 are associated, respectively, with electromagnets |34a, |36a, |3811, and |40a by wiring connections, the arrangement being such that when any switch is closed the associated electromagnet will be energized by circuit connections between the power lines a-s diagrammatically indicated at L1 and L2. Each of the electromagnet armatures |34b, |3619, |38b and |4073 carries a pawl that is spring urged into engagement with the ratchet wheel |00, the arrangementy being such that as the electromagnets are energized the ratchet wheel is propelled in a forward or counterclockwise direction as seen in Figure 4. A stop pin 34e is so positioned that the armature |341) will impart ten steps of movement to the ratchet wheel, the armature pawl also becoming wedged against the stop pin to prevent overthrow. Similarly a stop pin |360 is positioned so that the armature |36?) when actuated imparts iive steps of movement to the ratchet wheel. A stop pin |380 is arranged so that the armature |'38b imparts two steps of movement to the ratchet wheel, and a stop pin |400 is arranged so that the armature I40b imparts one step of movement to the ratchet wheel. The armatures thus selectively actuate the ratchet wheel distances determined by their respective money values. A holding pawl |42 is spring urged into engagement with the ratchet wheel and precludes opera-tion thereof reversely or in a clockwise direction.

Referring further to Figure 4, it will be seen that the energizing circuit for the motor 42 comprises a line |44 leading from the power line L1, the hose hook lever motor switch 44, a line |46, a thermal safety device |48, the function of which will be presently described, a line |50, the motor 42, a line |52, the coin switch mechanism |22-|24, and a line |54 returning to the power line L2, the arrangement thus being such that the motor circuit is energized whenever both the hose hook lever switch 44 and the coin switch mechanism |22|24 are closed.

Disposed in parallel with the coin switch mechanism |22-|24, between the wires |52 and |54 is a switch |56, which as shown in Figures 2 and 4 is associated with and actuated by the lowest order wheel or cents wheel 54a of the cost register, see Figure 1. More particularly, the cents register wheel has xed thereto a cam |58 provided with a pair of operating projections |60 at diametrically spaced points, the arrangement being such that the cam projections open the switch |5 twice during each revolution of the cents wheel, precisely as the cents wheel reaches its 5 and 0 positions as the cents wheel rotates in its forward or recording direction during a dispensing operation. It will thus be seen that circuit connections between the wires |52 and |54 will be closed when either the register switch |56 or the coin mechanism switch |22- |24 is closed, and broken only when both switches are open.

The delivery valve 28, previously referred to, is provided with an operating solenoid |62, Figures 1 and 4, the arrangement being such that the delivery valve is opened whenever the solenoid is energized, and spring urged to closed position when the solenoid is deenergized. The delivery valve may be of any suitable construction, operative as previously described to preclude fluid flow through the dispensing line when the valve is closed. As shown in Figure 4, the solenoid |62 is interconnected between a line |6| leading from the thermal safety device, and the line |52.

The metering valve 3| is provided with an operating solenoid |63, Figures l and 4, the arrangement being such that the metering valve is opened whenever the solenoid is energized, as in the case of the delivery valve. The metering valve solenoid |63 is disposed between the lines |6| and the power line L2, under control of the coin switch Ina-424:1.

In the operation of the structure, to effect a coin controlled dispensing operation, the customer may drop coins to lany aggregate value within the limits of the machine into the coin selector 70. The coins must be introduced one at a time inasmuch as there is only one coin opening l2. As the coins are accepted and passed to the coin box 00, the appropriate switches |34, |36, |30 or |40 will be actuated, thereby imparting an aggregate movement to the ratchet wheel |00, in a forward or counterclockwise direction, as seen in Fig-ure 4, corresponding to the money value of the coins deposited. Inasmuch as the shaft 90 is at this time stationary, the meter 26 being locked against movement by the stationary liquid column within the dispensing line, the movement of the ratchet Wheel |00 and its connected shaft 98 causes Athe differential 94 to impart a corresponding increment of movement to the shaft |12 and the shaft H8, thereby moving the register pointer 06 to a position indicating the total value of the coins deposited, and simultaneously moving the switch arms |22 and |2261, onto the contact sectors |24 and |24a to establish circuit connections between the lines |52 and |64, and between the lines |6I and L2. Inasmuch as the hose hook lever motor switch 44 is at -this time open, the motor and the delivery valve and metering valve solenoids |62 and |63 are not energized, regardless of the movement of the coin switches |22|24 and |22a|24a, and regardless of the position of the register switch |56.

The appropriate coins having been deposited, the customer next resets the volume and cost registers 52 and 54, from the previous dispensing operation by means of the resetting crank 64. In view of the interlock mechanism 66 provided, this resetting operation must be eifected before the hose hook lever 48a can be raised. During the resetting, the cost register switch |56 may be opened and closed a number of times, the hose lever switch 44 however still remaining open to preclude the establishing of the motor circuit or the energizing circuits to the solenoids. After resetting the registers, the customer removes the hose nozzle from its support hook and raises the hose hook lever 43a, thus closing the switch 44, and completing the motor circuit through the closed coin switch |22|24 and the motor thereupon starts. Simultaneously, the solenoid |52 for the delivery valve is venergized through the coin switch i22-i24, and solenoid |63 for the metering valve is energized through coin switch |22c|24a, and both the delivery valve and the metering valve open.

The dispensing now may be effected in the usual manner at full or partial flow rates by the appropriate opening and closing of the nozzle valve 36. At any time during the dispensing the customer may deposit additional coins into the coin slot, adding to the amount of gasoline to be received, such additional coin value being immediately registered by the pointer 86 and also effecting the appropriate additional movement of the switch arms |22 and |22a.

During the dispensing, the rotation of the meter effects the movement of the shaft 62, the movement of the shaft being proportional to the Cost of the fluid dispensed, due to the action of the variator mechanism 60. Movement of the shaft 62 eifects the corresponding movement of the differential shaft 90. The movement of the shaft S6 is transmitted through the differential to the shaft i2, the arrangement being such that movement of the meter 26 in a forward or dispensing direction rotates the shaft |I2 in a reverse direction in respect to the direction of movement imparted to shaft ||2 by the rotation of the ratchet wheel |00. The dierential shaft 68 does not move, except upon energization of one or more of the electromagnets |34a, |35a, 30a and |40a, due to the presence of the friction mechanism |04.

The reverse rotation of the shaft I i2 and connected shaft HS during'dispensing restores the pointer 86 to zero and the switch arms |22 and |22a to open circuit posi-tion, as shown in Figure 3. It will be noted that there is a space |68, Figure 3, between the end of the contact sector E24 and the switch arm |22, when the switch arm is in home position, the arrangement being such that the switch arm leaves contact with the sector when approximately 3 Worth or" gasoline still remains to be dispensed. Similar spacing is provided in the case of switch |22a-|24a, as will be understood. During the dispensing, the cost register switch |56 is intermittently opened each time the units order register wheel 54a passes its 5 and 0 positions. So long as the coin switches remain closed this is immaterial. However, when only 3c worth of gasoline remains to be dispensed, coin switches |22|24 and |22a|24a are opened. The opening of switch |22a|24a deenergizes the metering valve solenoid |63 and the metering valve 3| closes to slow down the dispensing flow rate. At this time the cost register switch |55 is closed so the opening of switch |22|24 is immaterial and the delivery valve solenoid |62 and the motor 42 remain energized; but when the register wheel 54a next reaches its 5 or 0 position, both switches |56 and l22-i24 will now be open, and the circuit between lines |52 and |54 will be broken, deenergizing the motor and closing the delivery valve 28. By this means the termination of the dispensing operation is slowed down and then accurately controlled by the position of the cents wheel and the cam |58 insuring accurate registration and measurement.

It is to be noted that the cents wheel always will stop in either its 5 or 0 position, due to the fact that the coin selector 1G receives only 5c, 10e, 25e and 50e coins.

Should the customer decide that he wants additional gasoline, he need merely deposit further coins whereupon the coin switches will be shifted the appropriate distance, energizing the motor and opening the valves, as will be understood.

To complete the operation, the customer merely restores the nozzle to its support hook, simultaneously actuating the nozzle switch lever 48a to open the switch 44 in the usual manner. The non-drain valve 38 prevents draining of the hose.

It may happen that after depositing coins to a certain value, the customer finds that his automobile tank will not hold gasoline to the full amount of the coins deposited. In such event, when his tank is full, he merely closes the nozzle valve 35, and restores the hose nozzle to its support hook. This restoring movement operates the hose switch lever 48a, breaking the motor circuit. Additionally, in accordance with the invention, means is provided in such event for automatically restoring the apparatus to normal condition, for use by the next customer.

The mechanism for restoring the apparatus to normal condition for use for the next customer comprises a solenoid |32, see Figure 4, and a rack |35. As shown in Figure 6, the switch |14 is connected to the switch transformer through the two supply lines L1 and L2. The stationary contact |69a of the switch |14 is connected by means of a line |15 to a switch |15 which is normally closed. The opposite contact of the switch |15 is connected by means of a line |11 to the three contacts of a reset relay which is operable when the change coins are dropped into the coin chute. The switch |14 is operated by means of a pin |12 on the end of the hose hook lever 48a, see Figure 4, the construction being'such that when the hose hook lever 48a is raised to dotted line position, the pin |12 will open and then wipe past the blade |111 without closing the switch, whereas on the downward movement of the switch lever 48a. the

pin will raise the switch blade |14 to contact the switch member |690. whereby to close this switch.

It may also happen, either through inadvertence or by design, that the customer may fail to dispense the full quantity of gasoline for which coins have been deposited, and may also fail to restore the nozzle to its support hook, in which event the pump motor 42 would continue to operate were safety means not provided. In accordance with the present invention means is provided for cutting out the motor if it remains in operation for an inordinate period of time, considerably in excess of a normal dispensing operation. Such means comprises the thermal safety switch |48, Figure 4.

As shown in Figure 4, this safety switch comn prises a contact sector |16 connected to the wire |45 of the motor circuit, and a bimetallic arm |18 xed at one end |19 and connected to the wire |55. The bimetallic arm carries an upstanding switch contact portion |88 normally in engagement with the switch sector |16, the energizing current for the motor thus passing through the contact sector |15, the contact |88, and the arm |18, between the wires |48 and |58. A heating coil |82 is arranged in series in the circuit, the arrangement being,t such that the heating coil is energized continuously during energization of the motor circuit.

If the motor remains in operation for an inordinate period of time, the heating coil |82 will be heated suiliciently to cause the V-shaped head portion |84 of the bimetallic arm |18 to move downwardly away from the stop pin IE5. A spring pressed plunger |86 engages the wedgeshaped head |84 in such a manner that when the head is moved downwardly a predetermined distance the point of the head moves past the plunger |86, whereupon the plunger causes the arm |18 to move downwardly sharply, breaking the motor control circuit between the switch sector |18 and the switch contact |80.

The plunger |88 will hold the motor circuit broken until the energization of solenoid |88, the armature of which comprises a link |98 connected to the head portion of the bimetallic arm. The arrangement is such that energization of the solenoid |88 projects its armature upwardly as seen in Figure 4, whereby to restore the bimetallic arm |18 upwardly against pin |85 and past the dead center or" the plunger |88, restoring the motor circuit. As previously indicated, the solenoid |88 is arranged in the circuit of the winding of the solenoid |32 so that the solenoid |88 will be energized simultaneously with the solenoid |32.

Now referring to Figures 3 and 6 of the drawings, it will be seen that means is provided for returning coins to substantially the amount of the unused gasoline. In explanation, in the operation of the automatic coin actuated dispenser, if a person withdrawing gasoline from the device finds that his tank is suddenly overrunning and is full and he has not yet used up all the money value of the gasoline for which he has inserted coins in the device, some means must be provided for returning to him the coin value of the unused gasoline. When his tank overows the operator immediately shuts off the nozzle valve of the hose so that further dispensing ceases. The device for returning coins to the operator of the pump includes a coin return control dial 200 shown in Figures 3 and 6 with which is associated a dial pointer 222 mounted on a shaft 204 which through

gears

226 and 222 is driven from a gear 2|0 on the shaft H2. The gears 2|0, 208 and 206 provide a predetermined motion reducer and drive the shaft 26d in the same direction as the shaft H3. As shown in Figure 6, the periphery of the dial 200 is divided up into segments 2|2 representing 95, 90, 85, 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, and 5 cents, and then there is a blank strip of insulation 0. The shaft 204 is grounded as at G, see Figure 6. The segments 2|2 are separately insulated one from the other and from the dial and are connected by wires 2|3 to 229 to the coin selector relays 25| to 287 as shown in Figure 6. In Figure 6 the wiper arm 222 of the coin return wheel 222 successively connects the coin selector relays to ground at G and the selection is determined by the setting or the dial arm 202 on the shaft 224 when the nozzle is hung .on the hook and before the switch arm 522 is reset by the electromagnet |32. The wiper 2i2 is wider than the space between the segments 2| 2 of the coin return dial 220. Each of the coin selector relays correspond ing to the values of 90e, 85e, 30e, 75, 70e, 65g?, 60@ 55, 50@ 45?. 4003, 35J 302J 2.5, 209?, 15, 10i?, and 5c, respectively, is controlled by back contacts of the next higher value coin selector relay so that a lower value relay can be energized when the dial arm 262 has completely left the higher value segment. The front contacts of the coin selector relays are connected in common to a supply wire 264 and to an appropriate one or combination of wires 208, 29|, 293, 295 and 297 connected, respectively, to the coin changer oprating magnets 2M, 2|6, 2|8, 220 and 222 which correspond to 5c, 10, 20c, 25e and 50c. One end of each of these electromagnets is grounded as shown. The armatures of these magnets are shown at 2M', 2|6, 2|8, 220 and 222 and they are adapted to contact a relatively long yoke 224 which is guided in slots 226 and 228 and the legs 23e and 232 of which yoke are normally pressed outwardly by the coil springs 234 and 236. A central stud 232 of this yoke is adapted to move a leaf spring contact 240 into engagement with leaf spring contact 222. The leaf spring contact 24e is connected by means of wire 244 to the wire il? previously described. The leaf spring 222 is connected to the solenoid 2.46 and has a wire connection 2:3? which terminates in a contact 228 opposite another contact 250 connected to a wire 252 that connects with wire |17. In turn there is another contact 2.54 and a spaced contact 25e, the latter being connected to the wire |77 and the former being connected by means of a wire 253 to a switch 25|), see Figure 5, which in turn is connected by means of wire 262 to the wire 261i. In addition the wire |71 has a short wire lead'Zt running to a contact 268 spaced from another contact 270 which is .connected to wire 212 which as previously described is connected to the winding of the solenoid |32 and by wire |33 to the winding of the solenoid |88. The solenoid 246 has an armature 216 carrying switch bars 278, 250 and 282 which are positioned so that when the solenoid is operated the switch bar 282 will close the contacts 26B and ,219, the switch bar 236 will break the contacts 25:3 and 256, and the switch bar 21B vwill make the

contacts

250 and 248. When any one of the soles noids 2M to 222 is operated the armature thereof will force the cross bar 224i downwardly against the tension of the

springs

234 and 236 to make the

switch contacts

240 and 242. The switch 260 is operated from an extension of the shaft |8 which carries a friction clutch plate 266, Fig. 5. The friction clutch plate 285, through the friction material 281, drives a sleeve 282 internally threaded as at 260. This sleeve 28S is rotatable in the stationary bearing 222. The internal threads of the sleeve threadedly engage the threads of a pin or stub shaft 294 which extends outwardly in registration with the shaft H8. This stub shaft is provided with a keyway that accommodates a key 298 which is aixed to the hub or bushing member 300. The keyway in the stub shaft 29s is elongated to permit the shaft to shift longitudinally with respect to the bushing 300 and the outer end of the stub shaft 294 is provided with an upstanding, laterally projecting pin 302 passing through a slot 304 in the bushing 360 to open and close the switch 250 upon turning of the shaft H8 and depending upon which way the shaft I8 is turned. The key prevents'the shaft 29d from turning but permits the pin 302 to move along the slot 364 to Open and close the switch 260.

The operation of the device is as follows. When coins are deposited, switch 5256, see Figure 6, is opened by the rlrst few degrees of counterF clockwise rotation of the shaft IIS by ratchet wheel |00. Hence no coin selector relay can be energized while coins are being deposited and while the hose is on the hook, The switch :26S is closed by the nrst few degrees of clockwise rota,- tion of the shaft i8, the pin 3,02 and slot 304 limiting axial motion of the stub Shaft 291i and the clutch plate 286 and friction material 2 8? allowing the sleeve 283 to stall after the first few degrees of rotation of the shaft i l0.

When, after a dispensing operation, the hose Vis put on the hook, the switch 74 `is closed thereby, and the switch 280 having already been closed by the clockwise movement of the shaft H0 during the dispensing operation, the selector relay which is then connected to the dial arm 202 is operated to connect, through its front contacts, the proper money changer magnet or magnets to the

line

26,2. When a coin magnet, such as 2M, 2i6, 2|8, 220 or 222 operates, its plunger depresses the bar 224 below it and operates the

reset switch

220, 242 to energize the reset relay 246. This relay locks itself in through its now closed contacts 24B and 250; opens circuits to the coin selector relays and coin magnets 2 i2, 2 i6, 2|8, 220 and 222 through its now open `

contacts

254 and 256, and through its now closed

contacts

260 and 270 closes circuits to the reset solenoid |32 and the reset magnet |88. When the solenoid |32 has returned the wiper arms |22, |22d and 202 to zero posi tions, it `opens the switch |25 to break the holding circuit, to the reset solenoid 246 and disconnects the wire 264 from the line L1 and thereby deeners gizes the coin selector relays and the coin magP nets 2 l 4 to 222, inclusive.

The e relay 235 will not be energized until after the wiper 202 has completely left the .9 5 segment. Each one of the coin selector relay magnets and its front switches provides a diierent combination of the coin changer magnets, shown to the right in Figure 6. For instance, the e` relay 281 will connect the 5.0 coin changer magnet 222, the 2.5 magnet 22.0 and the 20e or two dimes magnet 2|8 through wires 297,

295, and 203 to the supply wire 264. The operation of the coin changer mechanism is such that when the appropriate magnets 2|8, 220 and 222 are simultaneously energized the armatures will operate the coin changer, which may be of any well known construction, to eject into a discharge coin chute a 50g/f piece, a 25 piece and two dimes. Simultaneously, the armatures of the magnets will actuate the bar 224 against the pressure of the spring to close the switch to energize the reset relay 24S which locks itself in through its contact bar 218 and

contacts

248 and 250.

When the nozzle is taken on' the hook and the switch lever is thrown up the rod 46 actuates the switch 44 to start the pump motor which bypasses until the nozzle valve is open. As soon as the nozzle valve is open, the meter starts running and the meter then drives the shaft H8 reversely from the direction in which it was driven when the coins were deposited in the coin box 10.

As the shaft I8 is driven reversely, by the differential gearing, it turns the wiper arms |22, |22a and 202 in synchronism back toward zero position.

Now if for any reason the nozzle valve is closed before an amount of gasoline equal to the money value deposited is delivered the meter will stop and the arms 202, |22 and |22a will rest at predetermined angular positions dependent upon the difference between the sum deposited and the cost of the gasoline delivered. Now when, and only when, the control lever 48a, see Figure 4, is returned to full line position, thereby stopping the pump motor, is the coin change mechanism put in operation. This is due to the fact that the lever 48a in being so returned closes switch |14 for the first time, it being remembered that upon the upward movement of the lever to dotted line position, this switch was opened. However, on the depression of the lever 48a the switch |14 is closed for the rst time and this now completes the circuit from the A. C. power source through the circuits already described, to the particular coin selector relay corresponding to the money segment, upon which the pointer 202 happened to rest at the moment the switch |14 was closed. The selected coin selector relay in turn renders the proper combination of coin changer magnets effective to return the proper selection of coins to the operator.

Inasmuch as the present device is arranged to return as the lowest denomination pieces, and not pennies, it will be noted that in certain positions of the wiper 202 it will return two and one half cents more than is due the operator, while in other positions it will return two and one half cents less than is due the operator. However this averages out after a number of operations of the device, so that for all practical purposes the operator is not defrauded, and furthermore, by putting additional front contacts on the coin selector relays and making the gradations on the dial 200 in one cent increments instead of ive cent increments and providing also additional coin changer magnets, all in accordance with the foregoing, the device can be made to return money value to the exact cents. It is to be understood that in this case there would be 1c, 2c, 3c, 4 coin changer magnets, one of which would deliver 1c, one 2, one 3, and one 4, in combination with any combination of 50, 25, 2 dimes, single dime or a nickel.

Regarding the modification shown in Figure '7,

l2 the purpose of this modification is to eliminate the nineteen coin selector relays by providing a composite set of segments for cooperation with the wiper 202. This modification works on the principle that the coins are not returned until after the switch arms |22 and |22a have been reset, and the movement of the wiper is governed by the movement of the shaft ||8 after the hose has been hung on the hook and the switch lever 48a has closed the switch |14. The wiper 202 in this form does not move with the shaft HS when that shaft is being set up by the deposit of the coins nor does it move with that shaft when it is rotated in a clockwise direction during the dispensing of the gasoline. When the hose is hung on the hook and switch |14 is therefore closed, an electro-magnetic friction clutch 245 is energized and connects the shaft which drives the wiper 202 to the shaft H8. ence, as the shaft ||8 is thereafter driven in a clockwise direction by the resetting magnet |32 the wiper 202 is driven in a clockwise direction. Assuming that the wiper |22 for the disc |24, after the dispensing operation, rests at a point which corresponds to 35 worth of undispensed gasoline, then obviously the shaft ||8 will be driven by the reset magnet |32 to the extent of 35e and correspondingly the wiper 202' will be set in the position that engages a 25e segment and a 10 segment. This means that while the wiper |22 is driven back to zero, the wiper 202 in Figure '1 will be advanced, through the electric friction clutch mechanism, from zero to the 35 position. W'hen the magnet |32 has completely reset the shaft ||8 an abutment on the rack |30 closes the upper contacts of the switch |32S1 and thereby completes the circuit to the 25o magnet and the 10 magnet. The plunger-s of the coin magnets in being pulled down to operate the coin changer again contact the bar beneath the magnets and close the reset switch RS to energize the reset relay RM. This relay through its upper contacts completes a self-locking circuit through the switch WRMS controlled by the wiper reset magnet WRM. At the same time through the second or middle contacts of the relay RM, the wiper reset magnet WRM is energized, and through the bottom contacts of the relay RM the circuit to the coin magnets is broken so that none of the coin changer magnets can be energized during the resetting movements of the wiper 202'. When the wiper magnet WRM has reset the wiper 202' to zero or home position, the resetting rack operated by that Wiper magnet opens the switch WRMS and thereby breaks the holding circuit to the relay RM, and all parts are thus restored to home position and ready for the next operation.

In the device shown in Figure 6, it is only after the coins have been returned that the various wiper arms |22 and |22a and the coin changer control disc wiper arm 202 are reset or restored to zero or home position so that they are ready for the next dispensing operation of another customer, or by the same customer, if necessary. In Figure 'I the wiper arms |22 and |22@ are reset to zero or home position immediately upon the hanging of the hose and it is the resetting of these which sets up the coin changer control wiper arm 202 which is restored to its zero or home position automatically after the coins have been returned.

In this connection it is to be understood that the circuits are arranged so that when the operator dispenses all of the gasoline that he has paid for, no money will be returned to him because the Wiper arms |22, l22a and 202 (Fig. 6) or 202 (Fig. 7) will be returned to, or left in, a zero position at the end of the dispensing operation, whereas when the operator has not dispensed gasoline to the value for which he has paid at the end of the dispensing operation, the wiper arms 22, H2211, and 292 (Fig. 6) or 22 (Fig. 7) will be left in, cr subsequently moved to an angular position dependent upon the sum of money due the operator. In Figure 6 the wiper 2i52 controls the return of coins, dependent upon the position which it occupies at the instant when the hose is hung on the hook and before the resetting operation takes place. In the form shown in Figure 7, however, the wiper M2 is set by the resetting operation of the shaft H8 and no coins are returned until after that shaft has been reset to zero or home position. The coins are then returned and thereafter the wiper 292' is automatically reset to zero. Stated in another way, in Figure 6, if the arm 202 rests on the 35 segment, when the hose is hung on the hook and the switch IM closed, the coin selector relays will be energized immediately to shuck out or discharge 35o in coins. When the coins have been discharged, then the reset magnet |32 is energized and resets both the shaft H8 and the wiper 202 to their zero or home positions. On the other hand, in Figure 7 the Wiper 292 is in zero or home position at the instant that the dispensing operation is concluded, and when the nozzle is hung on the hook, the reset magnet 32 is energized and the subsequent resetting movement of the shaft H8 sets the wiper arm 202 to the proper coin position, i. e., the 35 position, to which it arrives when the shaft H8 has been completely reset to zero position. Thereafter the 35 magnets are energized, the coins are discharged, and the wiper resetting magnet WRM automatically energized, after release of the coins, to reset the wiper arm 202 to its zero or home position.

Wherever the words coin actuated or coin are used in the specification, it is to be understood that the words are broadly used to cover a check or any device the equivalent of a coin.

It is to be understood that the coin change magazines, viz: the 50c compartment, the 25 compartment, the dime compartment, and the nickel compartment, may be arranged directly under the corresponding coin chute compartments of the coin receiving means so that when a particular coin has passed the switch actuator in a coin receiving chute, it will then be deposited in the corresponding compartment of the coin change mechanism, so as to continuously replenish the particular coin change compartments as they are depleted by making change. In connection with the dime and 2091l chutes, a tilting device of well known form may be interposed so that the ten cent pieces are discharged alternately into the single dime chute and the double dime or cs chute. The top portion of the coin change compartments may be open so that when they are full of coins of their particular value, any surplus coins may spill down below into a general coin receiving receptacle which is generally locked, but which may be unlocked to receive surplus coins.

The present application is an improvement on the prior application iiled by James Ballard Moore, Serial No. 629,612, filed November 19, 1945,

for Coin Controlled Dispensing Pump. It is to be understood that the present invention can be utilized in connection with the subject matter disclosed in said prior application and may be used in connection with the hose reel type of device. It is also to be understood that the present device of the instant application may be used in connection with the construction shown in Figure 9 of said prior application of James Ballard Moore, Serial No. 629,612, led November 19, 1945, wherein the coin indicator dial remains stationary after being set to the money value of the coins deposited, and remains stationary while the rotatable switch arms 22 and i22a of said Figure 9 are rotated back to zero or home position during the dispensing operation. In fact it is preferred to use the present invention with the construction shown in Figure 9 of said prior application Serial No. 629,612, led November 19, 1945. So also in the present application it may be preferred not to use the thermal relay mechanism 148, and in lieu thereof or in addition thereto, if desired, we may utilize the hose reel construction shown in Figures 5 and 6 of the prior application Serial No. 629,612. These are minor points and do not affect the operativeness of the coin return mechanism.

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

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

l. A liquid dispensing apparatus comprising a dispensing line adapted to be connected to a source of liquid supply, means for propelling liquid through the dispensing line, power means for operating the propelling means, a meter associated with the liquid dispensing line and operable in accordance with the liquid flow therethrough, cost registering means associated with said meter, coin control means shiftable above a zero .position by the insertion of coins to any of a plurality of predetermined positions according to the Value of the coins inserted to establish a predetermined value of liquid to be dispensed, said coin control means being returned to zero by the movement of said cost registering means for terminating the dispensing flow after said predetermined value of liquid has been dispensed, manually operable means for terminatingl the dispensing Iiow independently of said means controlled by the cost registering means and with the coin control means .remaining at a position above zero corresponding to the value of the liquid preselected and not dispensed, and means actuated by said manually operable means for discharging a number of coins to the customer equal in Value to the position at which the preselecting means remains at the time the dispensing operation is terminated by said manually operable means, and means operated by manipulation of said manually operable means for also reconditioning said coin control means and said means actuated by manually controlled means for a subsequent unrelated dispensing operation.

2. In a device of the class described, in combination with a liquid flow line, pumping means for propelling liquid through the ilow line and a motor for the pumping means, said flow line having a nozzle with a manually actuatable valve therein, a meter associated with the line and operable in accordance with the liquid flow therethrough, a register operable in accordance with the movement of the meter, said register having a cost indicator, a coin actuated mechanism, a turnable device having an initial position and adapted to be driven away from said position by the coin actuated mechanism and to be driven toward said initial position by the cost indicator actuating mechanism of the register, mechanism including a dispensing control means actuated by the turnable device on returning to said initial position for terminating dispensing through said line, a manually actuatable switch control means for the motor for stopping and starting the same, coin change discharge means, means operated by said manually actuatable switch control means when actuated to motor stopping position for returning the turnable device to said initial position if the latter is in a position removed therefrom and for operating said coin change discharge means for returning coins to the customer, said coin change discharge means being controlled in part by said turnable device and operable to discharge coins only when said turnable device is away from initial position.

In a device of the class described, in combination with a liquid flow line, pumping means for propelling liquid through the flow line and a motor for the pumping means, said iow line having a nozzle with a manually actuatable valve therein, a meter associated with the line and operable in accordance with the liquid now therethrough, a register operable in accordance with the movement of the meter, said register having a cost indicator, a coin actuated mechanism, a turntable device having an initia1 position and adapted to be driven away from said position by the coin actuated mechanism and to be driven toward said initial position by the cost indicator actuating mechanism of the register, mechanism including dispensing control means actuated by the turnable device on returning to said initial position for terminating dispensing through said line independently of said manually actuatable valve, a manually actuatable switch control means for the motor for stopping and starting the same, coin change discharge means, means operated by said manually actuatable switch control means when actuated to motor stopping position and by said turnable device for operating said coin change discharge means for returning coins to the customer upon actuation of said manually actuatable switch means to motor stopping position with said turnable device in a position removed from said initial position, and means responsive to operation 5 of said coin change discharge means for returning the turnable device to said initial position and for restoring the coin change discharge means to position for another unrelated dispensing operation.

4. In a device of the class described, in combination with a liquid iiow line, means for causing liquid ilow therethrough, said line having dispensing control means, a meter associated with said line and actuated in accordance with liquid flow therethrough, a register actuated in accordance with the dispensing movement of the meter and including a cost indicator, coin actuated mechanism and coin change discharging mechanisin, a device driven from an initial position in one direction by the coin actuated means in acordance with the value of coins inserted therein, means for reversely driving said device from the register in synchronism with the cost indicator during dispensing toward initial position, means operable by said device upon return to initial position to render said dispensing control means effective to terminate dispensing, means operable for terminating said dispensing flow independently of said device, manually operable means for returning said driven device to initial position, means interconnecting said device and said coin change discharging mechanism for moving the coin change discharging mechanism to a predetermined position controlled by the return of said driven device to initial position and for discharging change corresponding in value to said predetermined position, and means responsive to the discharging of change for returning said coin change discharging mechanism to its initial position for a subsequent operation.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,204,242 Bradley Nov. 7, 1916 1,564,383 Varcoe Dec. 8, 1925 1,582,659 Baker Apr. 27, 1926 2,076,564 Hoban Apr. '13, 1937 2,250,051 Patzer July 22, 1941 2,271,397 McDermott Jan. 27, 1942 2,323,255 Sutherland June 29, 1943 2,354,896 Weiler Aug. 1, 1944 2,358,771 Hinds Sept. 19, 1944 2,384,585 Alexander Sept. 11, 1945 FOREIGN PATENTS Number Country Date 264,943 Great Britain Feb. 3, 1927 358,176 Great Britain Oct. 8, 1931 375,264 Great Britain Dec. 24, 1930 403,366 Great Britain Dec. 11, 1933