US2585718A - Change maker and circuit therefor - Google Patents

Description

Feb. 12, 1952 c. B. ADAMS ETAL CHANGE MAKER AND CIRCUIT THEREFOR -6 Sheets-Sheet 1 Filed June 25, 1948 m m m m Feb. 12, 1952 c. B. ADAMS ETAL 2,535,713

CHANGE MAKER AND-CIRCUIT THEREFOR Filed June 25, 194.8 6 Sheets-Sheet 2 JNVENTOR$ Feb. 12, 1952 c. B. ADAMS ETAL 2,585,713

CHANGE MAKER AND CIRCUIT THEREFOR Filed June 25, 1948 6 Sheetg-Sheet 3 INVENTORS.

Feb. 12, 1952: c. B. ADAMS firm.

CHANGE MAKER AND CIRCUIT THEREFOR 6 Sheets-Sheet 4 Filed June 25, 1948 INVENTORS. (zaiiara f 5 m5 Feb 12, 1952 c. a. ADAMS ETAL 2,585,713

I CHANGE MAKER AND EIRCUI'I THEREFOR Filed June 25, 1946 e Sheets-Sheet 5 Lil: L 9

IN V EN TOR-5 Patented Feb. 12, 1 952 CHANGE MAKER AND CIRCUIT THEREFOR Clifiord E. Adams and Fred E. Wallin, St. Louis, Mo., assignors to National Rejectors, Inc., St. Louis, Mo., a corporation of Missouri Application June 25, 1948, Serial No. 35,158

Claims.

This invention relates in general to coin devices and more particularly to a change making mechanism and an associated circuit for controlling vending machines, which machines are adapted to Vend units of merchandise or service. The machine will respond to the deposit of coins of larger denominations than the value of said unit by virtue of a coin changing device which automatically operates the vending machine to deliver one unit of value and automatically returns to the depositor the proper change in coins of predetermined denomination.

Vending machines incorporating change making apparatus in use by the public prior to this invention contained inherent defects which mitigated against their general acceptance and satisfactory operation. It is not uncommon for coins, particularly those coin slightly deformed or having debris or adhesive material on their surfaces, to lodge upon the coin switches in the coin changer, thus causing a surplus amount of change to be returned to the depositor, or delivery of a surplus number of vended units.

Another difficulty arises when the, supply of change coins in the machine is insufficient to supply proper. change to a depositor when the machine is operated by a coin larger than the predetermined unit value. These and other disadvantages are completely overcome in the present invention, the solution of which comprises important objects of the invention.

A further object of the invention is the provision of impact means for replenishing the supply of unit coins for change making purposes from the coins deposited.

Another object of the invention is the provision of automatic switching means, including an electric circuit in the vending machine for rendering.

the device inoperative when the machine is either sold out or otherwise inoperative, and automati-.

cally returning the deposited coins to the user.

A further object of the invention is the inclusion of relay means responsive to the coin switches for rendering the change making device inoperative and automatically converting the vending machine for operation withcoins-of unit value when the device has insufficient coins therein to make proper change.

Another object of the invention is the provision of a manually restorable relay responsive to the permanent closure of the coin switches for de-energizing the change making device, including other circuit means for conditioning the vending machine to operate with coinsof unit value These and other objects of the invention will be I apparent in one embodiment described and shown in the following specifications and drawings in which:

5 Fig. 1 is a front elevation of the change making device. I I

Fig. 2 is a rear elevation of the device shown in Fig. 1.

Fig. 3 is an enlarged fragmentary elevation of the lower portion of the device shown in Fig. l with parts removed.

Fig. 4 is thesame as Fig. 3 with certain elements in changed position.

Fig. 5 is a cross-sectional plan view taken through section line 55 Fig. 3.

Fig. 6 is a fragmentary cross-sectional view taken through section line 6-6 Fig. .3. a

Fig. 7 is a cross-sectional view taken through section line 'l'l Fig. 6 showing the path of travel of change coins.

Fig. 8 is a fragmentary cross-sectional plan view of the device taken generally through section line 8-8 Fig. 3.

Fig. 9 is a fragmentary cross-sectional view of the device taken through section line 9--9 Fig. 8.

Fig. 10 is a fragmentary cross-sectional view of the device taken through section line l0l'.-l Fi 3.

Fig. 11 is a schematic diagram of the electrical circuit for the change making device and the operative electric components of atypical vending machine.

In order to simplify the description and focus the features of the invention it is assumed that a typical vending machine is adapted to operate upon the deposit of a U. S. 5 coin, that the change making device will accept the deposit of U. S. 10 and 25 coins, and that thechange returned will be in coins of 5 denomination.

Referring to Fig. 1, a frame I serves as a housing for the change making device and a combi-.

nation slug rejector and coin sorter 2, which is shown positioned in the upper portion of the frame. All coins deposited are directed by means not shown into a single entry 3.

The change making mechanism 4 is positioned in the frame I, directly beneath the coin sorter 2 as shown. The coin sorter has a rejection passageway 5, for guiding non-acceptable or rejected coins into a return chute 6, the lower end of which is connected to a return cup not'shown. A cylindrical storage magazine 1 is positioned in the change maker for retaining 5 coins in a horizontal stacked relation, subject to' being dispensed from a bottom opening therein.

The rear view Fig. 2 illustrates various elements in their proper working relation, including the anticoin dispensing relay 8, coin rejecting electromagnets 9, I and II, master vending switch I2, 10 coin switch I3, 25 coin switch I4, 10 and 25 safety switch I5, and motor holding switch I6.

The change maker is'operated by an electric motor I"! having a selfcontained speed reducer secured to frame I with adrive shaft I8 projecting through the frame as shown in Fig. l. A magazine empty switch I9 is, positioned in frame I having an operating lever 20, normally urged into contact with the lower coins in the maga zine. When the magazine has a'pre-determined minimum of coins therein the switch lever 2!! will move inward and operateiiacontrol circuit.

Chute 2| integral with frame I is provided to collect and conduct acceptable gravity propelled I directly behind switch 25. The" para-magnetic switch levers 13a; and Md wheamoved to their lowermost position by the' downwardtravel of the and -boinsrespect-iv'ely will be temporarily held in displaced positionby-the magnetic attraction of permanenemag-nets 152 and I53 secured in the frame I,-:a -s hown Figs. 2' and 3.

A cam lever'2'I is pivdtally-securedtd frame I by shoulder screw 28]- A-tbrsionsp'ring 29 having its opposite ends secured to thescrew- 28 andlever 21 respectively; normally urges the lever-in a direction shown by arro-wi Th'e lower extremity of lever 21 is a cam follower3!);fpos'itiond-for engagement and movement by the rim of cam 23. The upper end of le'ver' 2-"I h'as secured therein' a pin 3I, which pin'is adapted to enga e a-cam surface 32 on a cradle member 33. 'Said cradlel is pivotally secured to the frame by stud '34 Cradle33 has a pair of integrally'spaced, projections 35 and 36 extending through clearance apertures in frame'I- for'sequentially opera-ting switches I5 and I6 when the cradle is rotated.

A lever 31 ispivotallymountedto frame" I 'by stud 3B and has its lower e'nd39 adapted "toenagecam-M; A spring 4'll having one end secured" to lever 31- and its opposite end to framed is provided to normally bias the lever in the posi-' tion shown Fig. 3. A pin 4I integral with the upper-end of lever 31 is adapted toenga'gei'cam" surface 42 of lever 43,; which lever; is .pivotally mounted "on stud 34 to'frame I. A projectionf44 of lever 43 is positioned through a clearance aperture in frame 'I to release operating .levIer I311 of switch I3 when lever 43 is rotatedQ I he opposite end of lever 43 ispositioned to op erate the lever 25a of switch 25 when-the-leven 43 is rotated. A second pin 46 secured-in lever 31 is adapted to engage cam surface 41 of lever 48. The lever 48 is pivotally mounted to frame I on stud 4B -and adapted torotateewhenwleven 31 is operated. A projectioni50'zintegralliwithr lever 48 extends through-a clearance zaperturei in frame I to displace lever 'I4a:of switch ::I4 when the .lever- '48 is rotated:- .The oppo'site eridi 5I of lever 48 is positioned to operate lever 26a of switch 26 when the lever 48 is rotated.

Fig. 4 illustrates the position of levers 21 and 3'! when operated by their respective cams 23 and 24, the movement of lever 21 imparts rotation to cradle 33, the projectors 35 and 36 of which will operate switches I5 and I6. The movement of lever 31'wi1l cam the levers 43 and 48 from the positions shown in Fig. 3 to positions shown Fig. 4 and sequentially operate switches 25 and 26'. The movement of levers 43 and 48 will also sequentially dislodge levers I31; and I la of switches I3 and I4.

The change coin storage magazine 1 is secured to a coin discharge base plate 52. An electromagnet 53 is secured to frame I with its armature 54 positioned as -a latch urged into position, shown Fig. 3, by spring 55 to serve as a lock for releasing the coin discharge means to be hereinafter described.

The cross-sectional'view-5; illustrates the relative position of the principal elements immediately below the coinsorter 22' Since the com-' bination coin rejector and-sorter 2 is well known in the art,-detailed description' will be omitted;

except to point out that acceptable coinsof-Ec. 10 and 25 denominationareconducted in sepa= rate chutes directly above passageways '55, 5?

trates the continuance of 'coin passageways 56,-

51 and 58 through the changemaker. A hopper 62, positioned to frame I, is used'to guide-all acceptable coins fromlower exits of passageways 56, 51 and 58 'intochute 2'I.- 'Ihecrank levers IZa, I3a and Ma of switches I2, I3 and- 14pm ject through appropriate clearance openings into- Crank lever I2a is rethe above passageways. sponsive- -to thedescent of each coinof each denomination whereas lever: 311 is positioned m be responsive to the descent of each 10 coin only descendingin passageway 51- andlever I ia is positioned to be responsive' to the-descent of each25 coin descendingin passageway 58.

The cross-sectional'view Fig.7 indicates the -in-- ternal constructionof passageway 55 and its relation to magazine: I. i The partition member 53 connects the magazine I through a rectangular opening 63 therein for'the' passage of 5coins from passageway5'5 into'magazinel. A rebound anvil 64,-; having its upper surface obliquely :positioned to the entrance of passageway 56,'is secured by rivetsto partition 59for causing5 coins to reboundifromxtheupper surface of'the: anvil into'the magazine as shown in dotted lines.-

The 5coins will; by gravity; fall into themaga zine in stacked relation as indicated. However,

when the magazine is filled surplus coins are 7 blocked from entering the magazinev and will fall into passageway :56 5 as indicated 1 and be conducted by hopper 62 into chuteZI: This construction "eliminates the conventiona and complicatedelectro magnetic sweep normally employedabove coin hoppers to prevent jamming slightly less than the-thickness of a 5 coin, is"

positioned for reciprocating-motion-beneath plate 52 between the latter and the frame I. The slide has a tongue 61 projecting upwardly through an aperture 68 in plate 52 for latching engagement Pins 69 secured in plate 52 serve as guides for the end of armature'54. A pair of ears integral with slide 58 project upwardly through a clearance aperture II in plate 52. A pin I2 through tioned for intermittent engagement with teeth I4 of wheel 22. Springs '15, each secured at one end to frame I and each having its opposite end sewards its discharge position. A circular coin discharge exit '16 is positioned in the frame I at a proper distance from the axis of the magazine I.

An elongated aperture l"! is provided in the slide 66 directly beneath magazine 'I when the slide is in latched position as shown Figs. 8 and 9. An ejection spring I8 is secured to plate 52 by rivets with armature 54 of electro-magnet 53 shown in engagement with the tongue 61 in Figs. 3 and 9.

coil 8, one terminal of motor I1, andterminates by connection. toxonfi'terminal of change slide electro-magnet 53.

Conductor 96 from power;5source connects normally closed blade 91 of relay 84 and one ter- Lminal of lamp 81. Switch blade 98 of relay 84 ears I0 supports roller 13, which roller is posiblade I00 of switch 94.

is connected by'conductor 99. to the-remaining terminal of lamp 8'! and. to normally open switch Armature blade.86 of relay 84 is connected toone terminal of relay coil 84 by conductor II and the remaining tercured to pin I2 normally urge the slide 55 to- I I9 having an ofiset portion 89 normally extending downward through aperture II in a slot BI in slide 66.

It is now apparent that the lowermost coin in the magazine i will rest in the coin aperture TI against the upper surface of frame I and when the armature 54 is withdrawn by electro-magnet 53 the springs 15 will move the slide 66 into its discharge position with aperture 'I'I coinciding with exit I6. Under these conditions the offset portion 80 of spring I8 will force the coin downward into a return cup not shown. It is apparent that the next lowermost coin in magazine I will be moved by gravity into aperture 11 only when the slide 66 is returned to its latched position as shown Fig. 9 and that for each reciprocal movement of slide 66 a coin will be discharged through the exit I6.

minal of relay coil 84 is connected by conductor 102 to the normallyopen blade I03. of delivery switch I04 Conductor IOI .also connects armathe remaining terminal of motor I I. Terminal I I4 of switch 26' is connected to the normally open terminal H5 of switch I4. Conductor H6 connects terminal II'I of switch 25 to normally open terminal H8 'ofswitch I3. Conductor II9 connects normallyiclosed terminal I of switch I3 to terminal I2I of switch I4. Terminal I22 of "switch I4 is connected by conductor I 23 to armature blade I24 of relay 8. A latch I25 ispositioned to engage and hold'blade I24 after relay coil 8 is energized. Blade'I26 of relay 8 is connected by a conductor I2'I to terminal I28 of switch I 9'. Blade I29 of relay 8 is connected by a The magazineempty switch is clearly shown in Fig. 10 with its lever 20 normally held downward by a predetermined number of coins in the lowerportion of the magazine I. When the magazine contains a predetermined minimum number of coins, the lever 20 will move to the position shown in dotted lines, by the action of a spring within the switch l9.

The schematic diagram Fig. 11 shows the control circuits for both a typical vending machine and the change device, and for clarity the upper dotted enclosure 82 indicates the circuit and electrical components usually a part of the vending machine. The lower dotted enclosure 83 is the circuit and the electrical components of the change making device.

Safety relay 84 is provided to protect the vending machine under certain conditions to be hereinafter described and is provided with a manually releasable latch 85 which will hold the armature blade 86 in displaced position following the momentary energizing of its coil. Lamp 81 is provided and adapted to be illumihated to indicate that the vending machine is empty. Use nickel only lamp 88 is provided and adapted to be illuminated when the coin storage magazine is empty.

Relay 89 is responsive to the deposit of coins to operate the vending machine. The rectangular symbol 90 represents an electric motor or other position, Figs. 1, 2, 3 and 11.

conductor I30 to terminal I 3| of switch I9 and one terminal of lamp'88. Blade I32 of relay 8 is connected to terminal I33 of switch I3 by conductor I34. Terminal I 35 of switch I9 is connected to one terminal of the 25 electro-magnet II. Terminal I36 of switch I5 is connected to one terminal of the 10 electro-magnet 9. The remaining terminals of magnets 9- and III are connected together by conductor I31. Terminal I38 of switch I5 is connected by conductor I39 to the remaining relay terminal of the 5 electro-magnet I0 and to blade I40 of relay 89.- The remaining. terminal of relay coil 89 connects through conductor I4I to blade I42 of relay 89 and to terminal I43 of switch I2. Blade I44 of relay 89 is connected by conductor I45'to the remaining terminal of the magnetic means 90. Armature blade I46 of relay 89 is connected by conductor I41 to blade I48 of switch I04. Blade I49 of switch I04 is connected by conductor I50 to blade I5I of switch 94 and to the remaining terminal of lamp 88.

In operationthe elements of the vendin machine and change maker are illustrated in rest Assuming that an acceptable 5 coin is deposited in entry 3,'Fig. 1, it will be tested and sorted by the combination g'rejector and sorter 2 and will descend by gravity into'the 5 passageway 56 of the change maker, shown Figs. 5, 6 and '7. In descending the coin will first impinge upon and displace lever I2a of magnetic means for operating the discharge mechanism of the vending machine.

L1 and L2 represents a source of electric energy aster vending switch I2, one terminal of relay the master vending switch I2 and" momentarily close a circuit between terminals 95 and I43 of' said' switch, shown Fig. 11, which will operate the ;..9P 3 wi s qra i ma az ne i e w rlr 7 .whtially filled;the 5zcoinidescending in passageway 56: will impinge upon the upper :surface' of anvil 64 and rebound therefrom through opening 63and nand I49 01 delivery switch1I04, conductor I50,

l thriough blades I5I andu93 ofgempty' switch 94, through conductor 9I, to the=line L1;- Whenthe i-magnet I- is energized; it willwithdraw a projection, not shown, in the rejector .2. and permit a coin to: descend into-passageway 59 of the .r change maker; In the-event that the machine is caused to be inoperative through various conditions to be hereinafter described,qmagnet I0 'F-will not-be energizedrand its-saidprojection will 1 1 cause-any 5 coinvdeposited thereinrto be by- ;Lpassed into passagewayfi and'thence into return chute 6;

-=rWhen the'master vending switch I2, Fig. 11, is

momentarily-closed by a 5 coin, a circuit will be 1 established from L1 through conductors 9|.and :,I4I, through relay 0011 89, conductor; IOI," closed blades 86and 91 of relayr84,'through conductor 96, to the line L2.- 'When the relay 8'9 isthus mo- -.-.:-mentarily energized, its blades I42-and I46 will 2 establish a; holding circuit-throughcoil 89, con- I :'=ducl;01 I41; closed blades I48: and I49 of delivery fixSWitCh I04,-through conductorI50; closed blades =qp I5I and'93 of empty switch 9.4zand:through con- "ductorSI to line L1. :"Simultaneously. a circuit will u be closed through the magnetic means 90 to op- .e'rate the'vendingmachine one cycle-by. virtue of conductors 9| and I45. and the-now.closedblades 0 1 a I 05 and-I44 of relay'B9 to conductor IOI. Through the use of-well known-means not'shown' the des livery. of onezunit of value or: service will cause a I switch; I04 to be momentarily toperated. -:This

operation will break the circuit throughlblades I48 and I49 to release relay 89 to'its rest position, shown Fig; 11; thus completing one delivery" cycle 0 of the vending machine. 1

In the event the vending machine is empty, switch. 94 will'be operated by means not shown, I 0 thus-temporarily holding open the circuit to relay.-89-and preventing its further operation.

Simultaneously a circuit will be established through the empty signal lamp 8! from L1, conductor 9I, now closed blades 93 and [00 of switch 94,- conductors 99 and 96 to the line L2.- 'Under these'conditions the lamp 81 will be illuminated :and the 5 reject magnet I0 willbede-energized by virtue of theiopenblades- 93 and I5I and thus -reiect.all5wcoins deposited. .It-isalso to be 7 noted that magnets 9 and II are positioned in the rejector. toreject and coinswhen de-en- ,..ergized. It-will, thereforeybe apparent that all coins .depositedunder the. above-.conditions .will '1; be rejected when the empty .switch94 isopert l i I In the'event 'thatia" 5;: coin, debris, or-other cause, holds master" 'switch I 2' in closedrposition, one unitf oi fvalue will be dispensed from the llending niachine aspreviouslydescribedf'i-Iowfall zinto magazine 1: in horizontalat'stacked posi- -1 ever; the: *operation of-;del ivery switch I04 -:will n w complete a 'circuitatromeconductor 9| through fterm'inals95 and I43 of:switch .I2',-'conductor. I4I, 'throughtclosed blades I42-and- I46 ofrelay 89, 5 through conductor I41, through-closed blades I48 :and I03 of. delivery switch I04; -conductor I102, through relay coil 84-, through closed blades 86 -and'9l to conductor 96. This circuitwill ener- -.-gizerelay coil 84 and operate relay-84, thus caus- 10 ing its armature to be latched open by latch 85. r :This movement of-blades-86-and 9'! will open the circuit to relay '89: and magnetic-means 9.0 thus i rendering the vending machine inoperative. runtil the switch I2 is openedand'latch 85 manually released.

' In" the event that a-10"coin isdeposited in entry 3, the vending machine will" operate; one cycle to deliver aunit of value-and thechange maker will dischargeone 5::coin as change in the-following manner.

- --Referring to Figs. 5 and 6, anacceptable 10 coin will descend in passageway EII'and first-gimpinge upon and momentarily operate lever I 2a 'of master vending switch I2; This'action, by means of'acircuit previously described, will operate the vending machine one cycle and deliver one unit of value. As the coin descends: inpassageway 5? it will impinge upon and displace lever I30, of switch I3, which Elever will remain g temp'orarily displaced by the attraction or the permanent magnet I52, Figs. 2 and 3.

- 'Referring to Fig. 11, the operatedswitch I3 will simultaneously close circuits. through motor I1 and electro-magnet 53; throughconductor IN, normally-closed blades I32sandf I89 ofl elay 8, 'conductor' I34, the nowclosed terminals I I81and I33 of: switch I3, conductor I I6, terminals II'I and H0 of switch 25, and conductor'sjflwand 9I. 'The instant electro magn'et '53 is energized its "armature 54, shown Figs. El and 9, will release slide fifi'under the'infiuence of springs 75 to discharge the lowermost coin in the magazine I through exit I6. Spring 18will insure the discharge of the coin by virtu'eofthe downward -=pressure of oifset portion 80.

It is to be noted that a circuit through the motor I? is initially made through terminals I08 and II3 of switch I6 and through terminals IIO and II! of s'afetyswitch 25. Thus when the-10 rd'switch I3 is temporarily closed, the motor-I! will start and cause'rotation 'to shaft, I8, shown'Fig. 3, which rotation will move cam 24 into engagement with the lower'en'd 39" of lever 37. Continued movement of the=cam 24 will cause lever 31 to move counterclockwise about its stud 38 against, the restraining bias of spring 40. The movementof pin M in lever 31 against cam-surface 42 will impart counterclockwise movement to lever 43. The first movement of the lever 43 will move its projection 44 upward and disengage lever l3a of switch I3 from magnet I52, thus restoring the 10 coin switch to'normal rest posi tion'. Slightly further-movement of lever-43 will --operate lever 25a ofsafety switch 25.

Again referring'to the elements as shown in Fig. 3, it is apparent thatthe initialmovement of shaft I8 resulting from thedeposit of a 10 coin willicausecam'zii to engage cam vfollower 30 of lever 27. to move the lever, clockwise about its shoulder. screw 28 against the biasing vaction of spring 29. The movement of lever 21,wil1 cause its pin 3I to engage cam. surface .32 of cradlemember 3.3and rotategthe cradle in a ,counter'clockwise. direction. about itswstud 34.

"Projection36 ofcradle 33' will immediately engage lever I 5a and operate motor holding switch I6. In a predetermined sequence cradle projection 35 will engage lever I5a and operate switch I5, which will open terminals I38 and I36 thereof and de-energize reject magnets 9 and II, thus rejecting any 10 and 25 coins deposited during the operation of the change maker.

The deposit of either 10 or 25 coins through circuit means, shown Fig. 11, and cam means, shown Fig. 3, will cause the drive shaft I8 to complete one revolution for each coin deposited by virtue of the operation of the motor holding switch I6.

Referring to Figs. 3, 4, 8, and 9, following the deposit of a 10 coin, the rotation of shaft I8 will begin, as previously described, and one tooth I4 of wheel 22 will engage roller I3 secured to the slide 65 and restore the slide from its discharge position to the position shown Fig. 3, where it will be relatched by armature 54, thus permitting the next lowermost coin in the magazine I to descend into the slide aperture 11, shown Figs. 8 and 9.

Referring to Fig. 11, following the closure of the 10 switch I3, the motor holding switch I6 will be operated by projection 36, shown Fig. 4, and thus maintain a circuit to the motor I'I through the closed terminals I 01 and H3 of switch I6 and conductors and 9|. Upon the completion of one revolution of the shaft I8, the holding switch will open to stop the motor by the operation of cam 23 and cam follower 30.

Thus it is apparent that under normal conditions the deposit of a 10 coin will operate the vending machine one cycle and discharge one 5 coin as change, and following this operation the device will come to rest and assume its normal rest position as indicated Figs. 3 and 11.

In the event that the coin switch I3 remains closed because of a suspended coin or debris, or other causes, and is not opened by projection 44, the change making device will be prevented from operating a second time by the action of safety switch 25, which is caused to operateby lever 43 immediately following the restoration movement of projection 44.

When switch 25 is operated while switch I3: is in displaced position, a circuit will be completed from conductor IOI, blades I06 and I32 of relay 8, conductor I34, through terminals I33 and H8 of-the now closed coin switch I3, conductor II6, through the now closed terminals III and I54 of safety switch 25, conductor I55, through relay coil 8, to conductor 9|. Under these conditions relay coil 8 will be energized and the relay latched open by latch I25. Thus blades I06 and I32 will de-energize the circuit to the motor I1 and stop the change maker from further operation. Simultaneousl a circuit will be established through the use nickel only? lamp 88 from conductor I 0| through blades I06 and I29 of relay 8, conductor I30, through lamp 88, conductor I50, blades I5I and 93 of switch 94 to conductor 9|. Illumination of lamp 88 will si nify that 5 coins only should be deposited. It is apparent that any subsequent 10 or 25 coins deposited will be rejected because of the open circuit to the reject magnets 9 and II resulting from the opening of blades I24 and I26 of relay 8. In order that the change making device be returned to normal operating condition, the cause of the permanent closure of the coin switch I 3 must be removed and the relay 8 manually unlatched. 7

When lever 31 is moved to a predetermined position, its lowerpin 45 will engage cam surface 41 and move lever 48 counterclockwise about stud 49. The first movement of lever 48 will cause projection 50 tostrike lever I4a. when displaced and held by magnet I53, to restore the said lever and its switch I4 to'normal position. Further movement of lever 48 will cause its end 5| to engage lever 26a and operate switch 26. The function of the two last mentioned switches will be hereinafter described.

When the vending machine and change making device are in normal rest position, the 10 and 25 reject magnets 9 and II remain energized by virtue of a circuit supplied by closed blades I48 and I46 of relay 89, conductor I39, the closed terminals I38 and I36 of switch I5,-

conductor I31, and the closed terminals I35 and I28 of switch I9, conductor I21 and closed blades I24 and I26 of relay 8, conductor I23 and the normally positioned coin switches I4 and I3, through conductor H9, conductor I34, closed blades I32 and I06 of relay 8, to conductor IOI. The completion of this circuit permits the free passage of 10 and 25 coins through the coin sorter 2.

Under the assumption that'the vending machine and change maker are in rest position, as shown Fig. 11, and a 25 coin is deposited in entry 3,. it will be sorted by sorter 2 and descend in passageway 58 and first operate switch I2, which will cause the vending machine to function in the manner previously described to deli er one unit ofvalue. Further descent of the 25 coin will displace lever Ma and operate switch I4 and since lever I4a will be temporarily retained by magnet I53, the motor I1 and electro-magnet 53 will be energized in the same manner as when a 10 coin was deposited, thus starting the cycle 7 of the change maker. Motor holding switch I5 will be operated and cause the motor to o erate for sufficient time to complete one revolution of its shaft I8 by virtue of cam 24, lever 21, Fig. 4.

When the electro-magnet 53 is energized the slide 66, Fig. 4, will discharge one 5 coin through exit I as shown Fig. 9. Immediately following the above operation the toothed wheel 22 will rotate and three of the teeth III thereon will successively reciprocate the slide 66 to discharge three additional 5 coins, which completes the change cycle. At this point projection 50 of lever 48 will engage and release lever Illa of switch I4 from permanent magnet I53, thus deenergizing magnet 53, causing the coin slide 66 to remain latched and completing the discharge of change'coins. The motor I! will continue the rotation of shaft I3 until projection 36 of cradle 33 releases the motor holding switch lever I5a, thus restoring the change making device to its normal rest position.

As in the case of the 10 coin, a 25 safety switch 26, Fig. 11, is connected to terminal N5 of the 25 coin switch and is operated immediately after coin switch I4 is restored, thus preventin continued discharge of change coins in the event that the switch I4 is held closed by defective coins, debris, or other causes. When the switch 26 is operated it is apparent that the initial circuit established through the motor I! and the electro-magnet 53 is opened and a circuit is completed from conductor IOI through blades I32 and I23, conductor I34, terminals I33 and I 23 of switch I3, .conductor 9, the now closed terminals I2I and H5 of switch I4, conductor I56, the now closed terminals I I4 and I51 of switch' 26, conductor'l55, through relay coil '8 to conductor 9| As in the case of the '10 coin,- the permanent closure of coin switch I4 will, through the cir cuit above described, operate relay 8 and-latchblades 32 and I06 in open position, thuspre-U 1 venting further operation of the change maker;- Simultaneously the open blades I26 and I24 will de-energize reject magnets 9 and II and thus reject 10 and coins subsequently deposited;

Again, as in the case'of the 10 coin, the closure of blades I05 and'l29:will illuminate the use nickel only lamp 88.. i:

When'th'e causeof the permanent closure of switch I4 is corrected, the latch I25 of relay 8 a is manually unlatched, thus returning all com-x ponents of the change maker. to their normal rest position, as shown Figs. 3 and -11.

Referring to Fig; 11, master switch I2 has an additional terminal I58, which in some caseszmay be used to initiate a well-known time-delay circuit, notshcwn, for delaying the operationiof the vending'machine until a deposited-coin has'al,

passed throu h the change maker.

Having described our invention we claim:

1. In a 'change'making mechanism'for operat-' ing an electrically initiated vending machine and for '.receiving gravity propelled coins of predetermined unit denomination and coins of a predetermined plurality of larger denominations, means forming a frame and a plurality of coin passageways, eachrof said passageways adapted to conduct each' said' coin of each denomina tionx'in. a :separate path, a momentary master electric-switch forlinitiating' the operation of said vending--machine,: said master switch responsive to the descent-of each coin of each said denomination, a plurality of additional momentary' electric rcoin switches positioned in said frame, corresponding' with and responsive respectively to the 'descent' in each of said passageways of each coin of each of said larger, denominations,permanent magnet holding means normal position in predetermined sequence when held by said magnet holding means, asource of electric energy, circuit means; connecting saidsource of energy, said vending machine, said master switch, said additional coin switches, said electro-mechanical means, said electro-mechanical motive'means, whereby a coin of one of the said larger denominations deposited in said mechanism will momentarily operate said master switch and initiate through said circuit means the operation of said vending machine and uponits further descent will operate'itssaid corresponding coin switch to energize through said circuit said electro-mechanical means and said electr c-mechanical motive means and whereby said cam means will restore said electro-mechanical means and said coin switch when a predetermined number of coins of unit denomination has been discharged from said magazine.

2. In a change: maker of the character de-y scribed, means forming a frame and a passage H way, said passageway adapted to conduct coins of predetermined large denomination, an electric"- coin switch in said frame positioned for operation by acoin descending in said passageway, magnetmeans for temporarily'holding said coin switch J in operated position, a magazine in said frame for storing aplurality offchange coins ofpredetermined small denomination,

number of change coins from said magazine when energized a predetermined period, latching relay means for de-energizing said electro-mechanical means when energizedpa safety switch normally completing a-circuitto said electro-mechanical' means adapted to de-energize said electro-mechanical means and simultaneously complete a circuit to energize said latching relay means when operated following the discharge of a pre-- determined numberof said change coins, cam means in said framedriven by said electric motive means for restoring said coin switch and sequentially operating'said-safety switch following said predetermined period, a source of electric energy,

circuit meansconnecting said coin switch, said electro-mechanical means, said safety switch, with said source of energy whereby the descent of a coin of large denomination will operate said coin switchand-throughsaid circuit means energize said electio-mechanical means to discharge a predetermined-number of change'coins from said magazine and whereby continued movement ofsaid cammeans will operate said safety switch to de-energizesaid electro-mechanicaL means when said circuit to said coin switch is not normally openedby said cam means.

3. In a change maker of the charecter described, means forming a frame and a passageway for conducting a plurality of coins of large denomination, a magazine in said frame for storing a quantity of change coins of prede-- termined small denomination, a coin switch positioned in said frame and operable by a coin of said large denomination descending in said passageway, holding means for holding said coin switch in operated position, electric motive means for s'equentially'discharging a predetermined-plu rality of said change coins when energized for a predetermined period, a safety switch connected in series with-said coin switch-for normally ener-' gizing said electric motive means whensaid coin switch is operated, cam means connected to and operated by said electric'motive means for re- 7 storing said coin switch against the action of saidfholding means-and successively operating said safetyswitch' after the discharge of the said predetermined number ofchange coins, a source of electric energy, circuit means connecting, saidv coin switch,.said electric motive means and said safety switch with said source of energy, relay meansconnected in said circuit means for latch-.

ing open said ,circuit means when energized,

whereby vthe-descent' of said coin of larger denomination in said passageway will operate said coin switch and energize said electric motive means to discharge a predetermined number of change'ccins from; said magazine and whereby said camrmeans lwill normally restore said coin switch and operate said safety switch following the discharge of said predetermined number of said-change coins andwhereby said safety switch will energize said relay and premanently' deenergize-said electric motive means when the electro-mechanical means for discharging a predetermined 13 portion of. said circuit means connected to said coin switch fails to open.

4. In an electric vending machine and an electric change maker therefor, vending machine circuit means for operating said vending machine one cycle when momentarily energized to dis charge therefrom one unit of value, a safety vending relay connected in said vending machine circuit means for latching said circuit open when energized, a delivery switch connected in said vending machine circuit means for momentarily completing aportion of said vending machine circuit to said vending machine relay, and

adapted to be operated by'the delivery of each said unit of value, a first passageway means in said change maker for receiving and conducting unit value coins each corresponding to said unit of value, a second passageway means in said change maker for receiving and conducting in a separate path predetermined greater value coins, a momentary vending switch in said change maker adapted to be momentarily closed by the descent of coins of each said value, said vending switch connected in said vending circuit means for momentarily completing said vending machine circuit means and simultaneously completing a partial circuit to said safety vending relay when operated, a change maker circuit means, electro-mechanical means in said change maker and connected in said change maker circuit means for discharging a predetermined number of unit value coins when energized, a change maker switch in said change maker connected in said change maker circuit means and adapted to be closed by the descent of each of said greater value coins, said change maker switch adapted and constructed to be opened by said electromechanical means when a predetermined number of said unit value coins are discharged, a source of electric energy, an interconnecting circuit means connecting said source of electric energy said vending machine circuit means and said change maker circuit means whereby the descent of each of said greater value coins will momentarily close said vending switch to energize all said circuit means and operate said vending machine to deliver one unit of value and temporarily close said change maker switch to energize said change maker circuit means to operate said electro-mechanical means to discharge a predetermined number of unit value coins and whereby the permanent closure of said vending switch and the operation of said delivery switch will energize said safety vending relay to open said vending machine circuit and render said vending machine inoperative.

5. In an electric vending machine and an electric change maker therefor, vending machine circuit means for operating said vending machine one cycle when momentarily energized to discharge therefrom one unit of value, a first pas sageway means in said change maker for receiving and conducting unit value coins each corresponding to said unit of value, a second passageway means in said change maker for receiving and conducting in a separate path predetermined greater value coins, a momentary vending switch in said change maker adapted to be momentarily closed by the descent of each coin of each said value, said vending switch connected in said vending circuit means and adapted to energize said vending machine one cycle when momentarily closed, a change maker circuit means, a safety change maker relay-connected in said change maker circuit means for latching said circuit open when energized, electromechanical means in said change maker and connected in said change maker circuit means for discharging a predetermined number of unit value coins when energized, a change maker switch in said change maker connected in'said change maker circuit means and adapted to be temporarily closed by the descent of each of said greater value coins and adapted to be opened by the operation of said electro-mechanical means when the latter has discharged a predetermined number of unit value coins, a safety switch connected in said change maker circuit means for partially completing a portion of said change maker circuit to said change maker relay when operated by said electro-mechanical means, a source of electric energy, an interconnecting circuit means connecting said source of electric energy said vending machine circuit means and said change maker circuitmeans whereby the descent of each of said greater value coins will momentarily close said vending switch to energize all said circuit means and operate said vending machine to deliver one unit of value and close said change maker switch to energize said change maker circuit to operate said electro-mechanical means to discharge a predetermined number of unit value coins and whereby the permanent closure of said change maker switch and the operation of said safety switch by electro-mechanical means will complete a portion of said change maker circuit to energize said safety relay for opening'said change maker circuit means to render said change maker inoperative.

CLIFFORD B. ADAMS. FRED E. WALLIN.

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

UNITED STATES PATENTS Number Name Date 1,564,383 Varcoe Dec. 8, 1925 1,798,289 Wigle Mar. 31, 1931 2,250,051 Patzer July 22, 1941 2,474,843 Helsing July 5, 1949

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