US3746018A - Change making device - Google Patents

Abstract

A device is disclosed which is adapted to cut off the flow of energization current to a change-making device when it continues to function in the change-making cycle, instead of stopping when it is supposed to. Associated with a motor that operates the device there is a cylinder and piston arrangement. The initial cut-off to stop the device is effected by a cam lobe, associated with a gear driven by the motor, actuating a lever that moves latches, which have ensnared a switch lever arm, to free the switch lever arm. When the switch lever arm becomes jammed or the normally open switch attached to the arm remains in the closed position for any reason, a cam lobe, formed on the cylinder which is moved from an inoperative to an operative position when rotated in unison with the first mentioned cam, wipes the actuating button of a normally closed switch, which is incorporated in the motor energizing circuit in series with the initial actuating switch, to break the circuit and shut the machine off. The cylinder is slidably mounted on a piston which is provided with a cam track that co-acts with a cam follower formed in the cylinder to raise the cylinder from an inoperative to an operative position. In normal operation the cam follower leaves the cam track and the cylinder descends from the operative position before the cam lobe thereon has reached the actuating button of the normally closed switch. The cylinder, however, has a lateral projection and a wire rod engages under this projection to maintain the cylinder in the operative position after the cam follower has left the cam track, if the motor continues to run after it should have been stopped. The wire rod is normally biassed to a position under the projection, it forming the lower part of a pivotally mounted arrangement, the upper part of which is normally spaced from an end of the motor armature. The motor is of the type which has a longitudinally movable armature and the latter moves to hold the wire rod in its normal position when the motor is energized. If the motor is de-energized at the proper time, the wire rod is simply displaced by the projection as the cylinder descends.

Description

United States Patent [1 1 Stewart 3,746,018 [451 July 17,1973

[ CHANGE MAKING DEVICE [75] Inventor: Wilson M. Stewart, Ottawa, Ontario,

Canada [73] Assignee: Vendall Machines Limited, Ottawa, Ontario, Canada [22] Filed: Oct. 26, 1971 [21] Appl. No.: 192,056

[52] US. Cl. 133/4 A, 194/10 [51] Int. Cl. G07d 1/00 [58] Field of Search 133/4 R, 4 A, R; 194/10 [56] References Cited UNITED STATES PATENTS 2,585,718 2/1952 Adams et al 194/10 2,581,502 l/1952 Wallin 133/5 R 3,244,185 4/1966 Vaccaro 133/5 R 3,550,742 12/1970 Peunell et al. 194/10 Primary Examiner-Samuel F. Coleman Assistant Examiner-David A. Scherbel Attorney-Christopher Robinson, Russel S. Smart sit-2L moves latches, which have ensnared a switch lever arm, to free the switch lever arm. When the switch lever arm becomes jammed or the normally open switch attached to the arm remains in the closed position for any reason, a cam lobe, formed on the cylinder which is moved from an inoperative to an operative position when rotated in unison with the first mentioned cam, wipes the actuating button of a normally closed switch, which is incorporated in the motor energizing circuit in series with the initial actuating switch, to break the circuit and shut the machine off. The cylinder is slidably mounted on a piston which is provided with a cam track that co-acts with a cam follower formed in the cylinder to raise the cylinder from an inoperative to an operative position. In normal operation the cam follower leaves the cam track and the cylinder descends from the operative position before the cam lobe thereon has reached the actuating button of the normally closed switch. The cylinder, however, has a lateral projection and a wire rod engages under this projection to maintain the cylinder in the operative position after the cam follower has left the cam track, if the motor continues to run after it should have been stopped. The wire rod is normally biassed to a position under the projection, it forming the lower part of a pivotally mounted arrangement, the upper part of which is normally spaced from an end of the motor armature. The motor is of the type which has a longitudinally movable armature and the latter moves to hold the wire rod in its normal position when the motor is energized. If the motor is de-energized at the proper time, the wire rod is simply displaced by the projection as the cylinder descends.

9 Claims, 7 Drawing Figures r--|r-* I 32 l as Milli; Hi1 I 34 up! I I lllllllllll l :1 22 1 I I 65 l {39 I M1 4: 4a

CHANGE MAKING DEVICE BACKGROUND OF THE INVENTION This invention relates to a change-making device.

Change-making devices presently in use, due to the failure of certain of the components, may jam in the change-making position to produce what is known to the trade as a jack-pot. Furthermore, unscrupulous persons have developed certain techniques and means that will jam the machine, again to produce the so called jack-pot.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mechanism to guard against the occurrence of jackpots.

Another object of the present invention is to provide a simple arrangement that is adapted to permit the change-making device to operate through a complete change-making cycle, but one which is also adapted, when the apparatus overruns and commences a further cycle, to interrupt the circuit and close the machine down. I

With these and other objects in view the invention may be defined as a change making device comprising a frame, a plate member secured to said frame and defining a passageway for a coin of a pre-selected denomination therebetween, a coin tube means mounted on said frame for storing coins of smaller denomination, a dispensing means for dispensing coins from said tube means, a motor mounted on said frame, driving means connecting said motor and said dispensing means, a circuit including said motor, a first switch in said circuit being arranged to be closed by a coin passing through said passageway and thereby connecting said motor to a source of energy, holding means for maintaining said first switch closed until said motor has driven said dispensing means through a complete cycle to dispense a pre-selected number of coins from said tube means, a second switch in said circuit in series with said first switch, said secondswitch being normally closed, a second switch actuator member movable between a first position and a second position, said actuator member being moved to said second position by said motor when it is running but being normally biased to said first position, said second switch being actuated to stop the motor if said motor continues to run after completion of said complete cycle.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a fragmentary elevational view of a changemaking device according to a presently preferred embodiment of the invention;

FIG. 2 is a sectional view taken on the line 2-2 of FIG. 1;

FIG. 3 is asectional view taken on the line 3-3 of FIG. 2;

FIG. 4 is an exploded sectional view taken on theline 4--4 of FIG. 2;

FIG. 5 is a sectional view taken on the line 5-5 of FIG. 2, but showing a difierentstage of the operation of the device;

FIG. 6 is a top plan view of a cylinder having a switch operatinglobe, a lateral projection and cam follower, and

.2 FIG. 7 is a side elevation of a piston having a cam track. i

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. I the device comprises aframe 20 upon which there is mounted avend switch 21 provided with anarm 22 which proturdes intoanarcuate slot 23 formed in saidframe 20. A changingdispensing switch 24, mounted belowswitch 21, is provided with aswitch arm 25 which protrudes into an'arcuateslot 26 formed inframe 20. Overlying theslot 26 there is pivotally mounted on apintle 27, and latch 28. The latch as shown in FIG. 1 extends upwardlyfrom the pintle to about midway of the slot. Thelatch 28 has formed therein arecess 29 which is adapted to snare theswitch arm 25 when it has been depressed. Asecond latch 30 having formed therein arecess 31 is also pivoted onpintle 27. Therecesses 29 and 3] respectively face inwardly toward theslot 26. Secured to thesecond latch 30 is astub shaft 32 which abutsagainst anarm 33 integrally formed onlatch 28.

A bell-crank 34 fulcrumed on apintle 35 has the free end ofarm 36 abutting against the under surface of stub-shaft 32. The free end ofarm 37 is bent at a right angle to form apad 38 which is adapted to contact acam 39. Thecam 39 is secured to and rotates with agear 40. Thegear 40 is mounted on andsecured to ashaft 41 which also has slidably mounted thereon acylinder 42. Thecylinder 42 is provided with abore 420 which is adapted to slidably engage with adowel 43 se cured togear 40 andcam 39. Theshaft 41, as shown, has its upper end rotatably mounted in the casing of amotor 44. The lower end ofshaft 41 protrudes through the top ofcylinder 42 to seat in apiston 45. Thepiston 45, see FIG. 4, is secured on astub shaft 46 which is secured in aflange 47 formed on theframe 20. Thegear 40 meshes with and is driven by a.gear 48 mounted on and secured to theoutput shaft 49 ofmotor 44.

Immediately behindframe 20 there is mounted aplate 50 which together with the back face offrame 20 forms a passageway, for coins entering the device. A coin entering the passageway descends and depresses the end of thearm 22 which protrudes into said passageway through aslot 23, thus closingswitch 21 which initiates the vending cycle of a vending machine in which the device is mounted. The coin, after it hasdepressed switch arrn 22, descends further to depressswitch arm 25 and is then guided by the passageway into a storage compartment below the device. Depression ofswitch arm 25 actuates switch 24 which energi zesmotor 44, setting thechange dispensing mechanism 64 in motion.

When theswitch arm 25 is depressed it contacts inclined surface 55 oflatch 28 causing the latch to pivot towards the right of FIG. 1 until the arm reaches the entrance to recess 29. Thelatch 28, due to the action of gravity thereon, then swings towards the left, snaringswitch arm 25. When themotor 44 has turnedtheshaft 49 through .a complete revolution, a cam 'lobe 56 formed oncam 39 wipes againstpad 38 formed onbellcrank 34, forcing the latter to rock on itspintle 35. Thelever arm 36 of the bell-crank moves upwardly and forces stub-shaft 32 and the contactingarm 33 upwardly, which causeslatches 30 and 28 to pivot onpintle 27. The movement oflatch 28 towards the rightfrees switch arm 25 fromrecess 29 but it is then snared inrecess 31 oflatch 30 where it is held until thecam lobe 56 has passed beyondpad 38. When thecam lobe 56 passes beyondpad 38 the bell-crank 34 immediately swings back toward the right, FIG. 1, against the nonoperative dwell of thecam 39, and theswitch arm 25 excapes from therecess 31 formed inlatch 30 and returns to its normal upward position, openingswitch 24 and thereby de-energizing the motor circuit. If, however, theswitch 24 shortcircuits or theswitch arm 25 remains, even after being released by the action ofcam lobe 56, in the depressed position, provision is made to stop the motor in any event. Thus,cylinder 42, driven bygears 40 and 48, is raised upwardly by acam track 57 formed on the periphery ofpiston 45, bearing against acam follower 59 in the form of a radial web incylinder 42. Under normal conditions, that is, when the device is functioning properly, acam lobe 60 formed oncylinder 42 moves adjacent toswitch button 61 ofswitch 62 but is stopped short of actuating the switch when the motor is stopped at the completion of a cycle, thefollower 59 then having passed the high point ofcam track 57 so that the cylinder is free to descend, placinglobe 60 at a lower level thanbutton 61. When, however, as above mentioned, theswitch arm 25 is not cleared from the latches or becomes defective and themotor 44 overruns, thecam lobe 60 wipes thebutton 61 ofswitch 62, which is wired in series withswitch 24, opening the contacts of saidswitch 62 and stopping the motor.

The actuation ofswitch 62 on overrunning of the motor is achieved by an arrangement which will now be described. Themotor 44 is of the type which has a longitudinally displaceable armature 44a. Thus, when the motor is energized, the armature 44a is displaced to the left from the position in which it is shown in FIG. 1. In the FIG. 1 position it permits clockwise movement, to the illustrated position, of arocker arrangement 66, pivotally mounted at 67, as aprojection 71 oncylinder 42 displaces ahorizontal extension arm 70 of awire rod 69 forming the lower part of therocker arrangement 66. Therocker arrangement 66 has anupper part 68 which'carries thewire rod 69 and it has its weight distributed so that it is normally biased to a position in which theextension arm 70 underlies theprojection 71 at the completion of a cycle, but the weight of the cylinder is sufficient to displace thearm 70 and rock thearrangement 66 to the FIG. 1 position as the cylinder descends, the cam follower at the completion of the cycle having passed the high point ofcam track 57 and being situated overlow point 63. However, if the motor remains energized at the completion of a cycle, the armature 44a will be in its displaced position and will not permit the aforesaid clockwise rocking of thearrangement 66. Thus, thearm 70 will not be displaced from its position underlying theprojection 71 but will hold the latter, and hence thecylinder 42 andlobe 60, in the raised position which they occupied when thefollower 59 was at the high point of thetrack 57. In this raised position, of course, thelobe 60 is at the same level as thebutton 61 ofswitch 62 and will actuate same as the cylinder continues to rotate, thus interrupting the energizing circuit formotor 44 and bringing the latter to a stop.

Thedispensing mechanism 64 which is driven by themotor 44, to dispense coins fromtubes 65, as change, may be of a type well known in the art and no further description thereof is deemed to be necessary for an understanding of the present invention.

The underside ofprojection 71 is rounded, as shown, to facilitate displacement of arm thereby and anupright pin 72 is fixed to the base offrame 20 to limit the anti-clockwise movement ofarm 70 to ensure that it properly underlies theprojection 71.

What I claim:

1. A change-making device comprising a frame, a plate member secured to said frame and defining a passageway for a coin of a pre-selected denomination therebetween, coin tube means mounted on said frame for storing coins of smaller denomination, a dispensing means for dispensing coins from said tube means, a motor mounted on said frame, driving means connecting said motor and said dispensing means, a circuit including said motor, a first switch in said circuit being arranged to be closed by a coin passing through said passageway and thereby connecting said motor to a source of energy, holding means for maintaining said first switch closed until said motor has driven said dispensing means through a complete cycle to dispense a pre-selected number of coins from said tube means, a second switch in said circuit in series with said first switch, said second switch being normally closed, a second switch acutator member movable between a first position and a second position, said actuator member being moved to said second position by said motor when it is running but being normally biased to said first position, said second switch being actuated by said actuator member in its second position to stop the motor if said motor continues to run after completion of a said complete cycle, said actuator member for said second switch comprising a cylinder adapted to slide on a piston secured to said frame, cam means formed on one of said piston and cylinder adapted to coact with a cam follower on the other of said piston and cylinder when said cylinder is rotated, to raise said cylinder from an inoperative position to an operative position, and a cam lobe formed on the exterior of said cylinder adapted to actuate said second switch when the first mentioned switch fails to open said circuit.

2. A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved by a coin passing through said passageway to a second position for closing said first switch.

3. A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved to a second position for closing said switch by a coin passing through said passageway, and wherein said holding means includes a latch arranged to hold said switching arm in its second position, and means driven by said motor for releasing said switching arm from said latch at the end of said cycle.

4. A change-making device as defined inclaim 3, wherein said latch is pivotally attached to said frame and is biased to a first position, and wherein a recess is provided in said latch for receiving and holding said switching arm when said latch is in its first position, said latch being arranged to be pivoted from its first position by said switching arm as said switching arm is moved by said coin to the second position of the switching arm to permit said switching arm to move into said recess.

5. A change-making device as defined inclaim 4, wherein the switching arm releasing means includes a disc cam mounted on a shaft, said shaft being geared to said driving means so as to revolve once during each dispensing cycle, a lever pivotally connected to said frame, said lever being arranged to be engaged and disengaged by a lobe on said cam as said cam revolves, the engagement and disengagement causing said lever to rock from an initial position and then to return to the initial position, repectively, and means enabling said lever to act on said latch, whereby said rocking of said lever from its initial position moves said latch from said first position to release said switching arm.

6. A change-making device as defined inclaim 5, wherein said holding means further comprises a second latch, said second latch being pivotally attached to said frame and normally resting in a first position, said second latch having a recess arranged to receive and hold said switching arm in its second position when said second latch is moved from its first position to a second position, and wherein said lever engages said second latch and moves it to its second position as said lever is engaged by the lobe of said disc cam, whereby said second latch receives and holds said switching arm in said second positions as said first latch moves from its first position, said second latch being arranged to return to its first position when .said lobe disenagaesjsaid lever, whereby said switching arm is releasedbyj said second latch. I

7. A change-making device as claimed in claim I, including holding means adapted to hold said cylinder in said operative position when said motor continues to run after completion of a said cycle.

8. A change-making device as claimed in claim 7, wherein said motor has an armature which is displaced longitudinally from a first position to a second position when said motor is energized, said cylinder has a lateral projection thereon and said holding means has a member which normally occupies a position underlying said projection as the end of a said cycle, said member being displaceable from said position by said projection when the motor has ceased to run but being held in said position by said armature as the motor is running.

9. A change-making device as claimed in claim 8, wherein said holding means comprises a rocker arrangement pivotally mounted on said frame and having an upper part aligned with said armature, said member being in the form of a horizontal arm at the lower end of said rocker arrangement.

Claims (9)

1. A change-making device comprising a frame, a plate member secured to said frame and defining a passageway for a coin of a pre-selected denomination therebetween, coin tube means mounted on said frame for storing coins of smaller denomination, a dispensing means for dispensing coins from said tube means, a motor mounted on said frame, driving means connecting said motor and said dispensing means, a circuit including said motor, a first switch in said circuit being arranged to be closed by a coin passing through said passageway and thereby connecting said motor to a source of energy, holding means for maintaining said first switch closed until said motor has driven said dispensing means through a complete cycle to dispense a pre-selected number of coins from said tube means, a second switch in said circuit in series with said first switch, said second switch being normally closed, a second switch acutator member movable between a first position and a second position, said actuator member being moved to said second position by said motor when it is running but being normally biased to said first position, said second switch being actuated by said actuator member in its second position to stop the motor if said motor continues to run after completion of a said complete cycle, said actuator member for said second switch comprising a cylinder adapted to slide on a piston secured to said frame, cam means formed on one of said piston and cylinder adapted to coact with a cam follower on the other of said piston and cylinder when said cylinder is rotated, to raise said cylinder from an inoperative position to an operative position, and a cam lobe formed on the exterior of said cylinder adapted to actuate said second switch when the first mentioned switch fails to open said circuit.

2. A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved by a coin passing through said passageway to a second position for closing said first switch.

3. A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved to a second position for closing said switch by a coin passing through said passageway, and wherein said holding means includes a latch arranged to hold said switching arm in its second position, and means driven by said motor for releasing said switching arm from said latch at the end of said cycle.

4. A change-making device as defined in claim 3, wherein said latch is pivotally attached to said frame and is biased to a first position, and wherein a recess is provided in said latch for receiving and holding said switching arm when said latch is in its first pOsition, said latch being arranged to be pivoted from its first position by said switching arm as said switching arm is moved by said coin to the second position of the switching arm to permit said switching arm to move into said recess.

5. A change-making device as defined in claim 4, wherein the switching arm releasing means includes a disc cam mounted on a shaft, said shaft being geared to said driving means so as to revolve once during each dispensing cycle, a lever pivotally connected to said frame, said lever being arranged to be engaged and disengaged by a lobe on said cam as said cam revolves, the engagement and disengagement causing said lever to rock from an initial position and then to return to the initial position, repectively, and means enabling said lever to act on said latch, whereby said rocking of said lever from its initial position moves said latch from said first position to release said switching arm.

6. A change-making device as defined in claim 5, wherein said holding means further comprises a second latch, said second latch being pivotally attached to said frame and normally resting in a first position, said second latch having a recess arranged to receive and hold said switching arm in its second position when said second latch is moved from its first position to a second position, and wherein said lever engages said second latch and moves it to its second position as said lever is engaged by the lobe of said disc cam, whereby said second latch receives and holds said switching arm in said second positions as said first latch moves from its first position, said second latch being arranged to return to its first position when said lobe disenagaes said lever, whereby said switching arm is released by said second latch.

7. A change-making device as claimed in claim 1, including holding means adapted to hold said cylinder in said operative position when said motor continues to run after completion of a said cycle.

8. A change-making device as claimed in claim 7, wherein said motor has an armature which is displaced longitudinally from a first position to a second position when said motor is energized, said cylinder has a lateral projection thereon and said holding means has a member which normally occupies a position underlying said projection as the end of a said cycle, said member being displaceable from said position by said projection when the motor has ceased to run but being held in said position by said armature as the motor is running.

9. A change-making device as claimed in claim 8, wherein said holding means comprises a rocker arrangement pivotally mounted on said frame and having an upper part aligned with said armature, said member being in the form of a horizontal arm at the lower end of said rocker arrangement.

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