US2739736A

US2739736A - Reset mechanism for registers

Info

Publication number: US2739736A
Application number: US247622A
Authority: US
Inventors: Harvey N Bliss
Original assignee: Veeder Root Inc
Current assignee: Veeder Industries Inc
Priority date: 1951-09-21
Filing date: 1951-09-21
Publication date: 1956-03-27
Anticipated expiration: 1973-03-27

Description

March 27, 1956 H. N. BLlss 2,739,736

RESET MECHANISM FOR REGISTERS Filed sept. 21, 1951 I Isnventor HAQVEY BL/ss (Ittornegs March 27, 1956 H. N. BLISS RESET MECHANISM FOR REGISTERS 4 Sheets-Sheet 2 Filed Sept. 21, 1951 Zmnentor HAM/EY BL/Ss Gttomcgs 'March 27, 1956 vH. N. Buss 2,739,736 RESET MECHANISM FOR REGISTERS Filed Sep't. 2l, 1951 4 Sheets-Snee 3 7 5B 60 /r/G. 4 T6 40 Gttornegs Marh 27, 1956 H, BLISS 2,739,736

RESET MECHANISM FOR REGISTERS Filed Sept. 21, 1951 4 Sheets-Sheet 4 nventor HAM/EY BL/@S (Ittornegs United States Patent O 2,739,736 RESET MECHANISM FOR REGISTERS Harvey N. Bliss, Windsor, Conn., assgnor to Veeder- Root Incorporated, Hartford, Conn., a corporation of Connecticut Application September 21, 1951, Serial No. 247,622 17 Claims. (Cl. 222-33) The present invention relates generally to liquid dispensing apparatus and, more particularly, to a mechanism for connection to the reset shaft of the register and to the pump motor of the dispensing apparatus to provide for automatic resetting of the register whenever operation of the pump motor is initiated. Although not limited thereto, the mechanism of the present invention is particularly useful for installation in dispensing apparatus in which the register is reset by oscillating movement of the reset shaft.

The object of the present invention is to provide a mechanism for use in gasoline dispensing apparatus which may be driven by the pump motor and which in a simple and efficient manner will actuate the resetting mechanism of the counter or register whenever the pump motor is turned on to initiate a dispensing operation, which will operate suiiiciently rapidly to insure that the resetting operation will not interfere with dispensing which will automatically disengage upon completion of reset and yet will be free of control of the operator or interlocked so that resetting must be carried out to completion when initiated, and which, if desired, may be so arranged that it will shut olf if there is interference with the resetting operation.

Other objects will be in part obvious, and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereafter set forth and the scope of the application of which will be indicated in the appended claims.

ln the drawings:

Fig. l is a diagrammatic and fragmentary side View of a gasoline dispensing apparatus in which the reset mechanism of the present invention has been incorporated;

Fig. 2 is a fragmentary side view of the register or counter of the dispensing apparatus;

Fig. 2A is a perspective view of the interference arm mounted thereon;

Fig. 3 is a View, partially in cross section, of the resetting mechanism showing the moving parts in position upon the initiation of a resetting operation;

Fig. 4 is a side view, partially in cross section, of the resettinsy mechanism showing the moving parts in the at rest position at the completion of a resetting operation and with the pump motor turned off;

Fig. 5 is a cross-sectional view taken along the line 5 -5 of Fig. 4;

Fig. 6 is a cross-sectional view taken 6-6 of Fig, 4; and

Fig. 7 is a cross-sectional view taken along the line 7-7 of Fig. 4.

Referring to Fig. l of the drawings, there is shown diagrammatically a conventional gasoline dispensing apparatus. The apparatus is contained in an elongated upright housing 10 and the various portions of the apparatus are mounted on a frame 12. As is usual in conventional gasoiine dispensing apparatus, the apparatus includes a along the line prime mover which, as shown in the drawings, is an electric motor 14. The electric motor 14 is connected to a pump 16 by means of a belt 18 extending around

pulleys

20 and 22 secured to the shafts of the motor 14 and pump 16, respectively.

The pump 16 has an inlet 24 which is adapted to be connected to a source (not shown) of gasoline or other liquid to he dispensed. The outlet 26 of the pump 16 is connected by a conduit 28 to a meter 30 which in turn has an outlet 32 which is adapted to be connected to the conventional flexible hose and nozzle (not shown) by which the gasoline or other liquid is dispensed. As will be apparent, when the motor 14 is energized, it drives the pump i6 which forces the liquid from the source of supply through the meter to the dispensing hose with the result that the meter output shaft 34 will be turned in proportion to the amount or quantity of the liquid dispensed.

The output shaft 34 of the meter 39 is connected to a speed change mechanism or variator 36 which may be of conventional construction and which in turn is connected to the counter or register mechanism The register or counting mechanism 38 is shown in more detail in Fig. 2 of the drawings and will be further described hereinafter.

The resetting mechanism of the present invention is referred to generally by the reference numeral 40. The mechanism is adapted to be mounted on the frame 12, for exarnpie, adjacent the register or counter 3S and the input shaft thereof includes a pulley 42 which may be connected by means of a belt 44 to a second pulley 46 on the shaft of the pump 16. Of course, if desired, the resetting mechanism of the present invention could be driven directly from the pump motor 14.

The pump motor 14 is provided with the usual switch 15 by means of which the motor can be turned off and on. The switch 15 is connected by a` connecting rod 48 to a bell crank lever 50 which, for convenience, may be pivotally mounted on a stud 52 on the exterior of the speed change mechanism or variator 36. The bell crank lever 50 is adapted to be moved by the operator to open and close the pump motor switch 15 as desired to commence or terminate a dispensing operation. For convenience, the bell crank lever 5t) may be connected to the hose hook support (not shown) whereby the pump motor may be turned on as an incident to or dependent upon the removal of the hose nozzle from the support. One end of the bell crank lever 50 is connected by a connecting rod 54 to an arm 56 mounted on a shaft SS of the resetting mechanism to be described more particularly hereinafter.

Referring more particularly to Figs. 3 through 7 of the drawings, which show the details of the construction of the resetting mechanism 40, it will be seen that the mechanism 40 is contained in a generally ectangular housing 60. The pulley 42 previously referred to as being rotated by the belt 44, which in turn is driven by the pump 16 or pump motor 14, has a hub 43 which is pinned to a shaft 62 which is rotatably mounted in bearings 64 contained in a journal 66 which is bolted to an aperture 68 in the side of the housing 60 by any suitable fastening means such as bolts 70. Secured to the inner end of the shaft 62 interiorly of the housing 60 is a driving member 72 of a tooth clutch denoted generally by the reference numeral 74. The movable driven member 76 of the tooth clutch 74 is rotatably and slidably mounted on a shaft 78 which is supported in alignment with the shaft 62 by being pinned to a boss 80 on the opposite face of the housing 60.

The clutch driving member 72 is provided with a plurality of radially extending shoulders 73 which may be engaged by teeth 75 on the movable driven member 76. Accordingly, when the movable member 76 is moved to the left, as viewed in Fig. l of the drawings, the clutch will be engaged and when the movable member 76 is moved to the right, the clutch will be disengaged. 1n order to prevent any clicking or touching of the teeth 75 and shoulders '73 when the clutch is disengaged, which might occur due to endwise play in the shaft 62, the shaft 73 is provided with an axial bore 82 in which is disposed aplunger urged outwardly by a compression spring 86. Since the outer end of the plunger 84 engages against the face of the driving member 72, it urges the shaft 62 to the left, as viewed in Fig. 4, thus effectively preventing the clutch member from engaging due to looseness or Aend play in the shaft 62.

The movable clutch member '76 is provided with an annular groove 77 and a pair of rearwardly extending projectionsl'9. The tail-like' projections 79 slidably eX- tend into aligned slots or notches 88 formed in the hub S9 of a worm 99 which is freely rotatably mounted on the shaft 78. The lengths of the projections 79 and slots 8S are such that the movable member 76 of the clutch l will be in driving engagement with the worm 9i) regardless of its axial position, thus insuring that it will drive the worm 9d when moved to engaging position.

The means for engaging and disengaging the clutch 74 is a lever arm 92 having a central hub 94 which is rotat- L,

ably mounted on a stud 96 extending between the end plates of the housing 69. Extending downwardly from the hub 94 on opposite sides of the movable clutch member 76 are a pair of

arms

95 and 97. Mounted on the extremities of the

arms

95 and 97 are rollers 98 which are rotatably mounted on studs 99 extending inwardly from the arms w95 and 97. The rollers 98 engage in the annular groove 7'7 in the movable clutch member 76 so that, when the lever arm 92 'is pivoted in a clockwise direction, as viewed in Fig. 4 of the drawings, the clutch will be 'engaged and, conversely, when the lever arm 92 is pivoted in a counterclockwise direction, the clutch will be disengaged.

Cooperating with and in engagement with the worm 9d is a worm wheel 100 which is lixed to a transverse shaft 102 extending outwardly through the side plate of the housing 6i). The worm wheel 100, of course, is adapted to be rotated by the worm 90 whenever the clutch 74 is engaged. The outer end of the shaft 102 which extends outwardly from 'the housing 60 is adapted to be connected to the resetting shaft of the computer or register. in the specific embodiment shown, the outer end of the shaft 1112 nas fixed thereto a crank 194 which is connected by a connecting rod 106 to a crank 10S connected to the reset shaft 110 of the register 38, whereby an oscillating movement is imparted to the reset shaft 11) upon each rotation of the shaft 102. If desired, however, a belt or chain drive could be substituted between the register and resetting mechanism in order to turn the resetting shaft 119 in a single continuous direction, which .Y

is necessary in vsome types 'of registers.

In the embodiment 'shown 'in the drawings, the mechan-ism is so arranged vthat when Athe clutch 74 is engaged, the worm wheel i) will be turned one complete revolution and then the clutch 74 will be Yautomatically disengaged. In order to control the clutch operating 'arm 92, there is provided a rotatabie 'disc or plate 112 which is coaxially mounted Vin side-by-s'ide relationship with the worm wheel 10G on the shaft 102 and this plate 112 carries adjacent its periphery a roller 114 which, when the Yplate 112 is rotated to the position show-n in Fig. 4 of vthe drawings, will cai'n the clutch actuating 'arm 92 to the clutch disengagi-ng position. The vclutch actuating arm 92 is biased in a Vclutch engaging Adirection by means of a vspring 116 fastened to the outer end of arm 92 and anchored at its other end on the housingit). The function of the spring 116 is to cause the clutch 74 to beco'me engaged whenever the roller 114 is jmoved from the camming lposition l'shown in Fig. '4 "of the drawings.

r.Ehe plate V112 lis adapted to be `'driven by the 'worm wheel through a lost motion connection consisting of a laterally projecting pin 118 on the plate 112 which extends into an elongated slot 120 in the adjacent outer surface of the worm wheel 100. The function of the lost iotion on pin and slot connection just described is to permit the plate 112 to be rotatably advanced ahead of the worm wheel 190 so as to permit the lever arm 92 to move to clutch engaging position while at the same time insuring, after a brief time interval, that the plate 112 wiil be positively driven by the worm wheel 100 so that, at the completion of one turn of the worm Wheel 169, the roller 114 carried by the plate 112 will cam the clutch operating arm 92 to clutch disengaging position, thus halting the operation of the mechanism.

For convenience of manufacture, there is fixed to the side of the worm Wheel 100 intermediate the Worm wheel and the plate 112 a spacer plate 122 which has a notch 124 in its periphery which corresponds and registers with the slot 120 formed in the face of the Worm wheel 199. What notch 124 does, in effect, is increase the depth of the slot 120 facilitating manufacture of the device and avoiding the necessity for close tolerances. The spacer plate 122 also has a peripheral notch 126 so that it will not interfere with the movements of the roller 114 previousiy referred to as being mounted on the plate 112. So far as the invention is concerned, the presence of the spacer plate 122 may be ignored.

in order to initiate the operation of the resetting mechanism, there is provided the transverse shaft 5S previously referred to as carrying the lever arm 56 which is connected by a connecting rod 54 to the bell crank S9. As a result, the shaft 53 is adapted to be rotated lin a counterclockwise direction whenever the pump motor is turned on. Conversely, the shaft 5i? inust be rotated in a clockwise direction whenever the 'pump'motor is turned ofi.

Within the casing dit and `in radial alignment with the disk 112 is a pivoted lever in the form of a plate 139 which is fixed to the shaft 58 referred to above. Carried by the plate 139 is a starting pawl 132 which is pivotally mounted on the plate at 134 and which is biased in a clockwise direction, as viewed in Fig. 4, by means of spring 136. The nose 138 of the pawl 132 is oifset as shown so that it also lies in the plane of the plate 112. Adjacent the roller 11.4 is a notch 140 in the periphery of the plate 112 which will receivey the nose of the pawl 132. The notch 14% is in pawl-receiving position when it is in the position shown in Fig. 4, i. e. with the roiler 114 camming the 'clutch operating arm 92 to clutch disengaging position.

As a result of the arrangement described, when the shaft 5S and hence the plate 131i are rotated in a counterclocliwise direction to the position shown in Fig. 3, the resulting travel 'of the pawfl 132 on the plate 130 will rotatably advance the plate 112 so that the roller 114 will ride off the offset end of the clutch actuating arm 92 and permit the spring 116 to move the arm 92 to clutch engaging position. Since in the specic embodiment shown in the drawings, the aforesaid c'ounterclockwise rotation of shaft 58 takes place simultaneously with the closing of the motor switch 15, the pulley 42, shaft 62, and clutch member 72 will immediately begin to rotate. Accordingly, the engagement of the clutch 74 will impart movement to the worm wheel 10). The worm Wheel 19t) will continue to rotate without driving the plate 112, (ignoring friction), until the trailing end o-f the slot 129 engages the pin 11S carried by the plate 112 whereupon the plate 112 is rotated in synchronism with the worm wheel 100 until the roiler 114 makes a complete circuit and again engages against the edge of the clutch actuating arm 92, causing the clutch to become disengaged.

The worm '91) and worm wheel 169 provide a desirable speed ratio whereby the reset shaft of the register is turned at a desired rate of speed which preferably is suiiiciently rapid so that resetting of the register will be accomplished during "a brief time interval. A brief time interval i111- sur'es that the operator Awill not have an opportunity to dispense any gasoline before the register has been reset or at least will not be able to dispense an appreciable quantity. In any event, the operator would not be under any incentive to dispense before resetting is completed, since the quantity so dispensed would not be registered and thus would not be charged against the customer.

On the other hand, it would be a disadvantage to permit the operator to turn the pump motor on and off in such succession that the resetting mechanism would not have sufficient time to complete the resetting operation. To avoid this possibility, the plate 130 is so arranged that the edge 131 of the plate 130 will cooperate with the plate 112 to retain the plate 130 and hence shaft 58 in the rotated position shown in Fig. 3 of the drawings for a sufficient length of time to insure complete resetting. As will be noted, the plate 112 has a latching shoulder 113 extending approximately halfway around the plate 112 which will engage against the edge 131 during the first half turn of the plate 112 and thus latch the plate 130 in the on position and prevent the operator from turning the pump motor off. Thereafter, the pump motor may be turned off but the inertia of the pump motor is such that the apparatus will coact to completion of resetting before the movement thereof is entirely stopped.

As previously mentioned, the shaft 102 may be connected to the resetting shaft of the register in any desired manner. The mechanism is particularly suitable for registers of the type having a reset shaft which is oscillated in order to reset the register to Zero. With such a register, it is an advantage that a connecting rod, such as the connecting rod 106, may be employed in place of a belt or chain drive connection to the reset shaft.

A register 38 of the type having a reset shaft which is oscillated in order to reset the register to zero is illustrated generally .in Fig. 2 of the drawings.v Referring to Fig.- 2 of the drawings, it will be seen that the register 38 includes a frame 140 on the opposite ends of which are mounted transverse number

wheel supporting shafts

142 and 144. Disposed on the

shafts

142 and 144 in sideby-side relationship are the number wheels 146 for registering the quantity of liquid dispensed and the cost thereof. The means for driving the number wheels, for transi ferring the count from the number wheels of lower order to the number wheels of higher order, and for disconwill not be described herein since the same forms no part of the present invention and an understanding of the same is not necessary in order to understand the present invention.

The register 38, as illustrated in Fig. 2 of the drawings, is of the type employing a heart-shaped cam reset. For this purpose each of the number wheels is provided with a heart-shaped cam 148 fixed to the side of each wheel and by means of which the wheel may be returned to zero. Mounted on auxiliary

transverse shafts

150 and 152 are cam actuating arms 154 referred to in the claims as reset arms, the

shafts

150 and 152 being referred to as reset arm shafts. The operation of the cam actuating arms 154 is such that, when the shaft 150 is turned in a counterclockwise direction and the shaft 152 is turned in a clockwise direction, the free end of each cam actuating arm 154 will engage upon the periphery of its cooperating heart-shaped cam 148 and rotate the associated number wheels to zero.

As previously mentioned, the register 38 is adapted to be reset by oscillating the reset shaft 110. For this purpose there is fixed to the reset shaft 110 a relatively long crank 108 which is connected by the connecting rod 106 to the crank 104 on the shaft 102 of the resetting mechanism 40. As a result of this connection, when the drive shaft 102 of the resetting mechanism is rotated through one revolution, thus revolving the crank 104, the crank 108 is first pulled down in a clockwise direction and is then returned in a reverse direction to original starting position.

As shown in dotted lines in Fig. 2 of the drawings, there is provided a driving gear 156 which is freely mounted on the reset shaft but which is adapted to be driven when the reset shaft is turned by reason of a coil spring 158 which has one end thereof secured to the shaft and which has the other end in engagement with the gear 156. The purpose of the drive between the shaft 110 and the gear 156 through spring 158 is to permit the shaft 110 to rotate independently of movement of the gear 156 in the event that turning movement of the gear 156 is prevented.

The gear 156 is in mesh with a gear segment 160 which is fixed to a transverse shaft 162. Also fixed to the shaft 162 is a two-segment gear 164 having a portion 164th in mesh with a gear segment 166 fixed to the shaft 152 previously referred to. The remaining portion 164b of the two-segment gear 164 is in mesh with a two-segment gear 163 which in turn meshes with a gear segment 170 fixed to the transverse shaft 150. The function of the gear train just described is to cause the shafts and 152 to be rotated counterclockwise and clockwise, respectively, when the reset shaft 110 is rotated in a clockwise direction during the first half of a resetting operation. Conversely, when the reset shaft 110 is rotated in a reverse direction (counterclockwise) during the second half of the resetting operation, the

shafts

150 and 152 will be rotated in a clockwise and counterclockwise direction, respectively. The spring drive 158 is sufiiciently strong so that during a normal resetting operation the cam actuating arms 154 will be driven with suflicient force to reset the number wheels to zero. In the event resetting of one or more of the number wheels to zero is prevented by the circumstance that one or more of the heart-shaped cams is so disposed that the point thereof is engaged by the cooperating cam actuating arm 154, movement of the gear train will be prevented but this will not prevent turning of the reset shaft 110 by reason of the resilient connection provided by the spring 158, as previously described.

ln the event that resetting of the register to zero is prevented for the reason given before, it is desirable that provision be made to automatically turn off the pump motor so that the operator will be required to again turn on the pump motor in order to carry out a dispensing operation which, as previously described, will also cause the resetting operation to be repeated. It has been found that the positioning of the heart-shaped cams which would prevent resetting is so critical that stoppage occurs only very rarely and that any slight amount of vibration such as a repetition of the resetting operation will invariably be sufficient to jar the mechanism from obstructing position, thus permitting resetting to go to completion during the subsequent resetting operation.

To provide the desired automatic turn-olf of the pump motor in the rare event that complete resetting is prevented on the first attempt, there is included in the mechanism, in accordance with the invention, a projecting arm 172 secured to the hub of the crank 108. Also there is provided a crank 174 having a hub 175 freely mounted on the outer end of shaft 150 and provided with an outwardly projecting arm 176. The projecting

arms

172 and 176 are in the same plane and of such length that the arm 176 will interfere with the travel of the arm 172 when the arm 176 is in the position shown in Figs. l and 2 of the drawings. As best shown in Fig. 2A of the drawings, the projecting arm 176 is normally held in the obstructing position referred to by a coil spring 178 which is disposed on the hub 180 of the gear segment with the ends of the spring 178 extending on opposite sides of

pins

182 and 184 on the segment 170 and arm 176, respectively. During a normal resetting operation in which resetting goes to completion'the gear Vsegment i7@ will be rotated in a counterclockwise direction and, by reason of the connection with crank 1'74 and projecting arm l76 through spring 173, will also pivot the latter to non-obstructing position. In the event that resetting cannot go to completion, the rotation of gear segment lf'tl will not be sufficient to pivot the arm i175 to non-obstructing position. In that event the projecting arm l'f/Z on the reset crank 168 will wipe past the projecting arm 176 to the position shown in dotted lines in Fig. l of the drawings, this being permitted by the resilient mounting of arm ifi/'o by spring 178. Then, on the return movement of crank lil to complete the operation, arm 172 again wipes past arm l', this time pivoting arm l-d in a clockwise direction.

The outer end ot the cranlt ll is provided with a stud 186 having a transverse bore Il which slidably ceives one end of a connecting rod Sitio. Connecting i d l is connected at its otherv end to the crank which, in turn, is connected to the motor switch through connecting rods 52'; and i8 and bell crank dit. The upper end of the connecting rod lett adjacent to where it extends through the stud ibo is provided with a pair of adjustable stopnuts As a result, the crank 174 can be freely turned counterclocktvise direction (such as during a normal resettl upon the connecting rod However, it the crank 17dis rotated in a clockwise direction, which will occur upon the return of the reset cranlt M8 to original position if there is a stoppage in the resetting operation as previously described, the stud 136 will engage against the stopnuts El), thus tensioning lthe connecting rod 188 and turning o the pump motor switch 15. The operator is thus compelled to again turn on the pump motor switch in order to carry out the dispensing operation which automatically repeats the resetting operation. The repeated resetting operation invariably will go to completion and then dispensing can be carried out in the usual manner.

As many changes could be made in the above construction and many apparently widely diierent embodiments of this invention could be made without departing from the Scope thereof, it is intended that all matter contained in the above description or shown in the accompanying draw' s shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specic features ot the invention herein described and all statements of the scope of the invention which, as a matter of anguage, might be said to fall therebetween.

I claim as my invention:

l. ln a liquid dispensing apparatus including a pump motor and a register having a reset shaft, a mechanism for connection between the reset shaft and pump motor to cause the register to be reset when operation of the pump motor is initiated comprising a clutch having a driving member connected to the pump motor, a disengageable clutch driven member, means for disengaging the clutch driven member including a cam, means connecting the clutch driven member and the register reset shaft including means for driving the cam, and means for advancing the cam independently of the last-named means when the pump motor is turned on.

2. .in a liquid dispensing apparatus including a pump motor and a register having a reset shaft, means for actuating the register reset shaft when the motor is turned on comprising a rotatable member, Vmeans for driving the rotatable member by the pump motor including a disengageable clutch, means including a rotatable cam for disengaging the clutch at one rotated position of the cam, a llost motion connection between the cam and the rotatable member, and means for advancing the cam when the pump motor is turned on.

Lg operation) without any elect 3. ln a liquid dispensing apparatus including a pump motor and a register having ka reset shaft, a reset mechanism comprising a worm and worm wheel, means connecting the worm to the pump motor including a disengageable clutch, an actuating arm for the clutch, a cam mounted coaxially with the worm wheel for engaging the arm at one rotated position of the cam, a lost motion connection between the cam and worm wheel, and means for advancing the cam to permit the clutch to engage when the pump motor is turned on.

in a liquid dispensing apparatus including a pump motor and a register having a reset shaft, a reset mechanism for actuatinfY the register shaft by the pump motor comprising a rotatable member connected to the reset shaft, means for driving the rotatable memberl by the motor including a disengageable clutch, means ina rotatable cam for disengagiug the clutch at one rotated p sition of the cam, a lost motion connection between the cam and the rotatable member, and a manually movable member for engaging the cam to advance the cam to initiate a resetting operation.

5. in a liquid dispensing apparatus including a pump motor, a pump motor Switch, and a register having a reset shalt, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, means for driving the rotatable member by the pump motor including a disengageable clutch, means including a rotatable cam for disengaging the clutch at one rotated position of the cani, a lost motion connection between the cam aud the rotatable member, and a movable member connected to the motor switch for advancing the cam when the pump motor is turned on.

6. in a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, means for driving the rotatable member by the pump motor including a disengageable clutch, means including a rotatable cam for disengaging the clutch at one rotated position or" the cam, a lost motion connection between the cam and the rotatable member, a pivoted lever connected to the pump motor switch, and a pawl on the lever for advancing the cam when the pump motor is turned on.

7. ln a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register Ahaving a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, a driving connection between the pump motor and the rotatable member including a disengageable clutch, a lever arm for disengaging the clutch, a cam mounted on the rotatable member for limited relative movement therebetween engageable with the lever arm at one rotated position ot the cam to move the lever arm to clutch disengaging position, and a movable member connected to the motor switch for advancing the cam from said one rotated position when the pump motor is turned on.

3. ln a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism comprising a worm and worm wheel, a driving connection between the pump motor and the worm including a disengageable clutch, a lever arm for disengaging the clutch, a cam mounted coaxially with the worm wheel for moving the lever arm to clutch disengaging position at one rotated position 'of the cam, a pin and slot driving connection between the worm wheel and cam permitting advancement of the cam relative to the worm wheel, a pawl for advancing the cam, and manually operable means for actuating the pawi connected to the motor switch.

9. ln a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on including a rotatable plate member iaving a latching shoulder thereon, and a pivoted lever mounted for pivoting movement through the orbit of movement of the latching shoulder, said pivoted lever being connected to the pump motor switch.

10. ln a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, a driving connection between the pump motor and the rotatable member including a clutch, a disc connected to the rotatable member for rotation therewith and having means thereon for disengagiug the clutch at the completion of reset, said disc having a radially extending protuberance extending partially about the periphery thereof, and means connected to the pump motor switch for engaging the clutch when the pump motor is turned on including a pivoted lever mounted for pivoting movement through the orbit of movement of said protuberance.

l1. In a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, a driving connection between the pump motor and the rotatable member including a disengageable clutch, means including a rotatable cam for disengaging the clutch at one rotated position of the cam, a lost motion, connection between the cam and the rotatable member, a manually movable member connected to the pump motor switch for advancing the cam when the pump motor is turned on, and means for preventing reverse movement of the manually movable member to open switch position during predetermined movement of the rotatable member.

l2. in a liquid dispensing apparatus including a pump motor, a pump motor switch, and a register having a reset shaft, a reset mechanism for actuating the register reset shaft when the pump motor is turned on comprising a rotatable member connected to the reset shaft, a driving connection between the pump motor and the rotatable member including a disengageable clutch, means including a rotatable cam on the rotatable member for disengaging the clutch at one rotated position of the cam, a lost motion connection between the cam and the rotatable member, a pivotal lever connected to the pump motor switch for advancing the cam when the pump is turned on, and means on the cam for preventing reverse movement of the lever to open the pump motor switch during predetermined movement of the cam.

13. In a liquid dispensing apparatus including a pump motor, and a register of the heart-shaped cam type having a reciprocal reset shaft, a reset mechanism driven by the pump motor for reciprocating the register reset shaft, means for initiating the operation of the reset mechanism when the pump motor is turned on, and means for turning off the pump motor when reciprocation of the reset shaft does not reset the register to zero.

14. In a liquid dispensing apparatus including a pump motor, and a register of the heart-shaped cam type having a reciprocal reset shaft and ix reset arm shaft, the combination comprising a reset mechanism driven by the pump motor for reciprocating the register reset shaft, means for initiating the operation of the reset mechanism when the pump motor is turned on, and means responsive to movement of the reset arm shaft for turning off the pump motor if the register is not reset to zero.

l5. in a liquid dispensing apparatus including a pump motor and a pump motor switch, a register of the heartshaped cam type having a reciprocal reset shaft, a reset arm shaft and a resilient driving connection therebetween, a reset mechanism driven by the pump motor for reciprocating the register reset shaft, means connected to the pump motor switch for initiating operation of the reset mechanism when the pump motor is turned on, and means connected te the pump motor switch and operated by relative movement or the reset shaft and reset arm shaft for dee-energizing the motor when movement of the reset arm shaft is insuflicient to reset the register to zero.

16, ln a liquid dispensing apparatus including a pump motor and a pump motor switch, a register of the heartshaped cam type having a reciprocal reset shaft, a reset arm shaft and a resilient driving connection therebetween, a reset mechanism driven by the pump motor for reciprocating the register reset shaft, means connected to the pump motor switch for initiatiny operation of the reset mechanism when the pump motor is turned on, a rst lateral extension resiiiently mounted on the reset arm shaft connected to the pump motor switch, and a lateral extension on the reset shaft for actuating the iirst lateral extension and thus the pump motor switch when movement of the reset arm shaft is insufiicient to reset the register to zero.

17. In a liquid dispensing apparatus including a pump motor and a pump motor switch, a register of the heartshaped cam type having a reciprocal reset shaft, a reset arm shaft and a resilient driving connection therebetween, a rotatable member connected to the reset shaft to reciprocate the same during one rotation of the rotatable member, a driving connection between the pump motor and the rotatable member including a disengageable clutch, means including a rotatable cam on the rotatable member for disengaging the clutch at one rotated position of the cam, a lost motion connection between the cam and the rotatable member, means connected to the pump motor switch for advancing the cam when the pump motor is turned on, a rirst arm resiliently mounted on the reset arm shaft of the register and connected to the pump motor switch, and an arm xed to the reset shaft of the register for engaging the first arm to actuate the pump motor switch, said first arm being moved to non-engaging position when the register is reset to zero.

References Cited in the file of this patent UNITED STATES PATENTS 2,109,353 Hazard Feb. 22, 1938