US3776338A - Credit pulse generating system for vending machines - Google Patents

Credit pulse generating system for vending machines Download PDF

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Publication number
US3776338A
US3776338A US00223147A US3776338DA US3776338A US 3776338 A US3776338 A US 3776338A US 00223147 A US00223147 A US 00223147A US 3776338D A US3776338D A US 3776338DA US 3776338 A US3776338 A US 3776338A
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United States
Prior art keywords
conducting material
deformable
credit
mounting
converter
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US00223147A
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English (en)
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K Johnson
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Seeburg Corp
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Seeburg Corp
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F5/00—Coin-actuated mechanisms; Interlocks
    • G07F5/10—Coin-actuated mechanisms; Interlocks actuated electrically by the coin, e.g. by a single coin
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F5/00—Coin-actuated mechanisms; Interlocks
    • G07F5/20—Coin-actuated mechanisms; Interlocks specially adapted for registering coins as credit, e.g. mechanically actuated
    • G07F5/22—Coin-actuated mechanisms; Interlocks specially adapted for registering coins as credit, e.g. mechanically actuated electrically actuated

Definitions

  • ABSTRACT A system is provided in which the momentum of a moving credit indicator, such as a coin or token, is directed against a mechanically deformable converter, such as a piezoelectric crystal, to produce a signal pulse utilized in determining credit to be granted a vending machine customer.
  • a mechanically deformable converter such as a piezoelectric crystal
  • a separate compartment with an associated piezoelectric crystal is provided for each type of credit indicator deposited in the vending machine. The individual components of the system in each compartment are easily assembled and at least a number thereof are maintained in position without soldering or other fastening procedures until the compartments are assembled into a composite unit.
  • This invention relates generally to a system for producing an electrical signal in response to the motion of an inanimate object, and, more specifically, this invention relates to the use of a piezoelectric crystal to convert the motion of a coin or other credit indicator into an electrical signal without the necessity of any moving parts and hence replace conventional coin switches.
  • the present invention was developed in order to pro vide a credit pulse production arrangement in which there would be no moving parts. Briefly, this is accomplished by utilizing a mechanically deformable converter, such as a piezoelectric crystal or magnetostrictive device, against which a falling credit indicator such as a coin or token impinges.
  • a mechanically deformable converter such as a piezoelectric crystal or magnetostrictive device
  • a piezoelectric crystal is utilized.
  • the mechanical deformation of the crystal produces an electrical signal pulse in accordance with the well-known piezoelectric effect. It has been found that this pulse has a shape and magnitude that permits it to be directly utilized to drive logic circuits (after appropriate clipping). This eliminates the problems that resulted from the useof moving parts and the necessity of fine adjustments that are present in prior art coin switches, while at the same time permitting the removal of much filtering circuitry between the coin switch and the control circuitry of the vending machine.
  • the directing means include a guide means which direct the coin to impinge upon a strip of flexible conducting material that acts as a striking area for the crystal.
  • the striking surface need not be a flexible strip but'could be a soldered wire, etc.
  • This flexible strip also holds the crystal snugly against a block of conducting material (the anvil), which is rigidly positioned on the other side thereof.
  • the strip of flexible conducting material and the block of conducting material also serve as the conductors by which the electrical signal produced by the crystal is transmitted to appropriate circuitry in the vending machine.
  • Both the strip of flexible conducting material and the block of conducting material are mounted on a mounting wall.
  • the block of conducting material is riveted to the mounting wall.
  • a pair of mounting pins extend from the mounting wall on opposite sides of the piezoelectric crystal.
  • mounting means for the crystal are provided on four sides by the mounting pins, the strip of flexible conducting material and the block of conducting material.
  • the positioning of the mounting pins and the structure of the block of conducting material is Various attempts have been made to alleviate some of these difficulties, such as providing better and more easily operable adjusting arrangements. In other cases, some of the disadvantages have been overcome by electromagnetically inducing pulses in order to minimize the contact problems. However, even these improvements over the basic coin switches presently utilized have involved moving parts and at least some of the attendant difficulties.
  • Supporting pins extend from the mounting wall to support another block of conducting material which is engaged by the other end of the strip of flexible conducting material.
  • the flexible strip also bears against the end of a guide member and a positioning pin extending from the mounting wall that cause the strip to be distorted and bear against the crystal and the second block with a tension force.
  • the force exerted by the strip of flexible conducting material on the piezoelectric crystal and the second block of conducting material causes these elements to be maintained in position without any additional securing or fastening devices, such as solder or mounting screws.
  • each mounting wall except for the mounting wall at one end of the assembly faces the mounting surface of a mounting wall in an adjacent compartment.
  • the compartments are formed by placing two appropriate mounting walls in conjunction. After assembly of each of the compartments, end walls are located at each end of the stacked compartments and the whole assembly is permanently secured by two mounting bolts.
  • Another object of this invention is to provide a system for producing credit pulses in a vending machine that does not require any switch adjustments.
  • Yet another object of this invention is to provide a credit pulse producing system for vending machines that permits the elimination of expensive filter circuitry needed with prior art devices.
  • Still a further object of this invention is to provide a coin-pulse producing system that may be easily assembled and which may be maintained with'a minimum of fastening devices.
  • Still another object of this invention is to provide a coin pulse producing system in which some of the components of the individual coin compartments are maintained in place during assembly without the necessity of any extra fastening devices.
  • FIG. 1 is a front elevational view of the credit pulse generating system of the present invention shown connected to the coin chute of a vending machine.
  • FIG. 2 is a right side view of the device illustrated in FIG. 1.
  • FIG. 3 is a top plan view of the credit pulse generating system illustrated in FIG. I.
  • FIG. 4 is a partially exploded view illustrating the components of a single coin compartment in the credit I
  • FIG. 9 is a plan view of'the mounting surface of a mounting wall for another compartment of the credit pulse generating system of the present invention.
  • FIG. 10 is a plan view of the other surface of the mounting wall illustrated in FIG. 9.
  • FIG. 11 is a plan view of the mounting surface of the mounting wall for still another coin compartment of the credit pulse generating system of the present invention.
  • FIG. 12 is a plan view of the other surface of the mounting wall illustrated in FIG. 11.
  • FIG. 13 is a plan view of the mounting surface of the mounting wall for yet another coin compartment in the credit pulse generating system of the present invention.
  • FIG. 14 is a plan view of the opposite surface of the mounting wall shown in FIG. 13.
  • FIG. 15 is a schematic illustration of a typical coin pulse produced by prior art coin switches.
  • FIG. 16 is a schematic illustration of a pulse produced by the credit pulse generating system of the present invention.
  • FIG. 17 is an enlarged view of the converter portion of the credit pulse generating system of the present invention.
  • FIG. 18 is another embodiment of the present invention.
  • FIG. 19 is another embodiment of the present invention.
  • FIG. 20 is another embodiment of the present invention.
  • EMBODIMENT utilizes coins, reference to the credit indicators deposited in a vending machine will be limited to coins for purposes of this description of the preferred embodiment.
  • the credit pulse generating system encapsulated unit 20 is bounded by an end wall 24 (FIGS. 5 and 6) and mounted on a projecting plate 26 from coin chute 22.
  • Individual coin compartments are formed by mounting walls 28, 30, 32 and 34, in conjunction with end wall 24, in this particular embodiment. It should be recognized, of course, that the use of four coin compartments is merely illustrative of this particular embodiment and that as many coin or credit indicator compartments as required for a particular situation may be employed.
  • Each 'of the mounting walls has thereon the components shown in the exploded view of FIG. 4.
  • a pair of mounting pins 36 and 38 extend from the mounting wall to provide a space therebetween for a piezoelectric crystal 40, which is the mechanically deformable converter utilized in this preferred embodiment.
  • a piezoelectric crystal 40 which is the mechanically deformable converter utilized in this preferred embodiment.
  • Pins 36 and 38 are placed such that a line through the centers thereof would be at an angle to the horizontal.
  • Piezoelectric crystal 40 may be placed to produce either positive-going or negativegoing signals.
  • One surface may be coated with a gold conductor while the opposite surface is coated with a silver conductor in order to readily determine the appropriate positioning in order to obtain the desired polarity. 1
  • the piezoelectric crystal 40 rests on a block of conducting material 42.
  • Block 42 may be formed of any suitable conducting material, such as brass.
  • a sloped surface 44 is provided on block 42 at an angle to match the angle of pins 36 and 38.
  • a terminal 46 At the other end of block 42 there is located a terminal 46, which extends beyond casing 20.
  • a strip of flexible conducting material 48 is positioned above the piezoelectric crystal 40 and pins 36 and 38.
  • the non-horizontal relationships of pins 36 and 38, and the corresponding slope of portion 44 ofblock 42, is provided in order to have the top surface of crystal 40 parallel to strip 48.
  • Strip 48 is at an angle to the horizontal to insure that after a coin strikes the piezoelectric crystal it is deflected away from the crystal so as to prevent any coin bounce, or repetitive actuations.
  • Flexible strip 48 may be any type of spring metal, such as phosphor bronze.
  • the strip of flexible material 48 bears against the crystal 40 through a dimple 49 (FIG. 17) and forces it against sloped portion 44 of block 42, which provides a rigid support or anvil.
  • Flexible strip 48 provides a striking surface against which the coin impinges to compress the crystal 40, and the dimple 49 concentrates the pressure at a given point.
  • the coin is directed against flexible strip 48 by a guide member 50, an end 52 of which serves to support and position the strip 48. End 52 of guide member 50 and a positioning pin 54, which extends from the mounting wall, position and distort strip 48.
  • Strip 48 also has an extended end portion 56 transverse to the length of strip 48.
  • End portion 56 engages a groove 58 in a second block of conducting material 60.
  • the block 60 has an extending terminal 62 which also protrudes beyond casing 20.
  • Block 60 is mounted on supporting pins 64 and 66, which extend from the mounting wall.
  • Block 42 is mounted on the mounting wall by rivets 68 and 70.
  • block 42 When the components are being assembled on the mounting wall, block 42 is riveted in place and .block is placed on its supporting pins 64 and 66. Flexible strip 48 is then forced into position so that it engages blocks 60, positioning pin 54, end 52 of guide member 50 andpiezoelectric crystal 40. Piezoelectric crystal 40 may be inserted between mounting pins 36 and 38 either before or after insertion of the flexible strip 48, although it is normally preferable to do ,it after the strip is in position to minimize the possibility of damage to the crystal. As it is necessary to deform strip 48 in order to fit it in the allowed place, it is tensed and serves to retain all the components in place during assembly of the unit. After all the components have been mounted on each of the mounting walls, the individual mounting walls are joined together with end wall 24.
  • a spacer 80 separates plate 26 from mounting wall 34.
  • the bottom portions of the mounting walls and end wall 24 are separated by spacers 82, 84, 86, 88, with spacer separating mounting wall 34 from plate 26.
  • Each of the spacers has a projecting portion that mates with a corresponding bore on the opposing wall to maintain all the walls as a composite unit until the structure is permanently bound together by bolts 92 and 94, with their respective nuts 96 and 98. These bolts pass through an opening provided in the spacers 72, 74, 76, 78, 80, 82, 84, 86, 88 and 90 and their corresponding projections.
  • FIG. 5 illustrates the outer side of end wall 24 and the openings 100 and 102 through which bolts 92 and 94 pass,,respectively.
  • FIG. 6 depicts the other side of end wall 24 which, along with the surface of mounting wall 28 illustrated in FIG. 7, forms a nickel coin compartment.
  • bores 104 and 106 are formed about openings 100 and 102, respectively. These bores mate with projections 108 and 110, respectively, on mounting wall 28.
  • projections 108 and 110 extend from sleeves 82 and 72, respectively.
  • An upper end portion 112 of end wall 24 is flared outwardly, so that with a corresponding flared end portion 114 on mounting wall 28 a coin receiving slot is formed.
  • a tab 116 is formed on end wall 24.
  • Correspnding tabs 118, 120, 122 and 124 are formed on mounting walls 28, 30, 32 and 34, respectively. These tabs are utilized as an indexing device, so that when the individual walls are placed together it may be seen at a glance whether they have been put in the proper relative positions. This is achieved by placing each of the tabs at a slightly different position, so, as may be seen in FIG. 1, from a side view the tabs would appear as a solid line. If there is a break in this line, it is immediately obvious that one of the mounting walls (or the end wall) has not been placed in the proper position.
  • FIG. 7 it may be seen that mounting surface of mounting wall 28 has been provided with an additional guide member 126.
  • Guide member 126 serves, along with guide member 50, to direct the coin against the flexible striking surface 48.
  • Guide member 126 has a length such that a coin rebounding from the striking surface 48 will not strike the guide member 126, which would cause the coin to rebound against the striking surface and the piezoelectric crystal, but will permit the coin to pass on to, an appropriate coin box.
  • FIG. 8 The other side of mounting wall 28 is illustrated in FIG. 8, which, along with the mounting surface of mounting wall 30 illustrated in FIG. 9, forms the quarter coin compartment of this embodiment of the invention.
  • a series of three ridges 128, 130 and 132 extend from this side of mounting wall 28. These ridges determine the width of the compartment between the ends of these ridges and mounting wall 30 through which the quarters pass.
  • the upper portion 134 of mounting wall 28 is flared back toward the nickel compartment, in order to form a coin receiving slot with a flared upper portion 136 of mounting wall 30.
  • Bores 138 and 140 mate with projections 142 and 144, respectively, on mounting wall 30 to position mounting walls 28 and 30 with respect to each other.
  • a guide member 146 similar to guide member 126 but adapted to the larger size ot'the quarter coin, is formed on mounting wall 30.
  • the other side of mounting-wall 30 (FIG. 10) cooperates with the mounting surface of mounting wall 32 to form the dime coin compartment.
  • Ridges 148 and 150 define the size of the dime compartment.
  • Mounting surfaces of mounting walls 32 and 34 are essentially the same as the mounting surfaces of the mounting walls illustrated in FIGS. 7 and 9.
  • Mounting wall 32 has a guide member 166 and mounting wall 34 has a guide member 168 which are adapted to the size of the respective dime and half dollar coins with which these mounting walls are associated.
  • the other side 'of mounting wall 32 has three extended ridges 170, 172 and 174 which have respective flared top portions 176, 178 and 180 which, along with flared portion 182 on mounting wall 34, form a coin receiving slot for the half dollars.
  • FIGS. and 16 illustrate comparative pulses produced by a conventional coin switch and the pulse generating system of the present invention.
  • a first break 184 occurs as the result of contact bounce produced when the contacts are caused to engage a coin striking the actuating paddle.
  • Breaks 186, 188, 1 90, 192 and 194 occur as a result of dirty contacts or insufficient contact force (which could result from an improper adjustment of the switchblades).
  • Break 196 occurs from paddle bounce resulting from too great a tension in one of the switchblades. It is apparent that a pulse of this nature would have to be carefully filtered in order to preclude the unwarrented granting of credit to a customer and to distinguish one coin pulse from another. Of course, not all coin switch pulses are this imperfect, but even one break creates the problem.
  • the pulse produced by the system of th present invention is a single clean pulse that may be clipped at any desired level, such as at the point shown by line 200, to produce a single pulse that requires no filtering and which may be fed directly to controlling logic circuitry.
  • the prior art disadvantages have been obviated to a considerable degree.
  • FIG. 18 illustrates an arrangement in which a bending force is used instead of a compression force.
  • a falling coin 202 strikes a paddle 204.
  • Rotation of paddle 204 under the force of the coin causes actuating rod 206 to follow the motion of end 208 of paddle 204 as a result of the force of spring 210.
  • This alternative embodiment still has the problems inherent in a moving paddle, but is does eliminate the need for accurate adjustment of switchblades and an external power source.
  • FIG. 19 another embodiment is shown in which a coin 228 strikes an impact block 230.
  • the impact block moves a rod 232 to cause a plunger 234 to impact on crystal 236.
  • the resultant deformation of crystal 236 produces an electrical signal on leads 238 and 240.
  • FIG. 20 is a generalized version of the preferred embodiment described herein.
  • a credit pulse generating system-for a vending machine comprising:
  • each of said deformable converters representing a particular credit indicator
  • mounting means supporting each of said deformable converters in a given position, said mounting means comprising: 1
  • each of said strips extending across an associated pair of said restraining devices on the other side thereof to retain the corresponding deformable converter between said restraining devices and against the associated block of conducting material and to provide said striking surface for deposited credit indicators;
  • each credit indicator deposited in the vending machine to stress the deformable converter representing that particular credit indicator, said stress of each of said deformable converters being a compressive force occasioned by the associated credit indicator impinging upon a striking surface to compress that deformable con- .verter; and electrical means for detecting and transmitting signals generated by distortion of said mechanically deformable converters upon stress thereof from transfer of kinetic energy from the associated credit indicators thereto.
  • a system as claimed in claim 1 wherein said restraining devices are mounting pins.
  • each of said strips of flexible conducting material is positioned at an angle to the line of motion of said credit indicators in order to prevent said credit indicators from striking said deformable converters more than once.
  • each of said blocks having a groove formed therein.
  • each of said strips of flexible conducting material has a transverse projection formed on one end thereof; and each of said directing means comprises a guide member having one end thereof located in proximity to said positioning projection,
  • a credit pulse generating system for a vending machine comprising:
  • each type of credit indicator deposited in the vending machine having a separate compartment representative thereof;
  • each of said compartments comprising:
  • first block of conducting material rigidly mounted on said mounting'wall, said first block being located beneath and extending across said pair of mounting members;
  • a mechanically deformable converter positioned between said pair of mounting members and on top of said first block of conducting material
  • a second block of conducting material mounted on supporting pins protruding from said mounting wall and having a groove therein adapted to receive said portion of said flexible strip;
  • directing means including a pair of guide members for directing a deposited credit indicator toward said deformable converter
  • a terminal connected to each of said first block and said second block to detect an electrical signal produced by a credit indicator striking said flexible strip immediately above said deformable converter.
  • formable converter is a piezoelectric crystal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Testing Of Coins (AREA)
US00223147A 1972-02-03 1972-02-03 Credit pulse generating system for vending machines Expired - Lifetime US3776338A (en)

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US22314772A 1972-02-03 1972-02-03

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US (1) US3776338A (fr)
JP (1) JPS4885297A (fr)
AU (1) AU467007B2 (fr)
BE (1) BE794880A (fr)
CA (1) CA989788A (fr)
ES (1) ES411238A1 (fr)
FR (1) FR2170230B1 (fr)
IT (1) IT984242B (fr)
LU (1) LU66942A1 (fr)
NL (1) NL7301515A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173624A (en) * 1985-04-08 1986-10-15 Qonaar Corp Low power coin discrimination apparatus
EP0184393A3 (en) * 1984-12-05 1987-09-30 Mars Incorporated Coin checking apparatus
US4726458A (en) * 1985-07-24 1988-02-23 Andras Gati Device with a sensor for the recognition of coins
US4848556A (en) * 1985-04-08 1989-07-18 Qonaar Corporation Low power coin discrimination apparatus
WO1990004238A1 (fr) * 1988-10-05 1990-04-19 Pom Incorporated Systeme de compensation des parametres pour parcometre electronique
US5360095A (en) * 1992-04-07 1994-11-01 Pom Incorporated Power conserving electronic parking meter
DE19613716C1 (de) * 1996-04-01 1997-12-11 Trenner D Wh Muenzpruefer Vorrichtung zum Schalten eines Münzprüfers
WO2003071496A2 (fr) * 2002-02-25 2003-08-28 Beaver Machine Corporation Systeme de surveillance de distributeur automatique
EP1047026B1 (fr) * 1999-04-21 2006-04-05 Juan Munar Escandell Sélecteur pour pièces de monnaie ou jetons
US20060070842A1 (en) * 2004-09-29 2006-04-06 Smartmech Corporation Vending machine tracking system with controlled switching device

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US3086132A (en) * 1960-08-30 1963-04-16 Sensonics Inc Piezoelectric mounting and device
US3304773A (en) * 1964-03-26 1967-02-21 Vernon L Rogallo Force transducer
US3332430A (en) * 1965-12-27 1967-07-25 Otto F Busch Disk assorting and counting apparatus
US3519800A (en) * 1966-04-22 1970-07-07 Singer Co Perforation sensing apparatus
US3557616A (en) * 1967-09-29 1971-01-26 Combustion Eng Particle flow sensing device

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GB876885A (en) * 1958-06-24 1961-09-06 Ass Elect Ind Improvements relating to counting apparatus
US3559788A (en) * 1969-03-17 1971-02-02 Seeburg Corp Switching arrangement and method employing coin controlled motion transducer

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Publication number Priority date Publication date Assignee Title
US3086132A (en) * 1960-08-30 1963-04-16 Sensonics Inc Piezoelectric mounting and device
US3304773A (en) * 1964-03-26 1967-02-21 Vernon L Rogallo Force transducer
US3332430A (en) * 1965-12-27 1967-07-25 Otto F Busch Disk assorting and counting apparatus
US3519800A (en) * 1966-04-22 1970-07-07 Singer Co Perforation sensing apparatus
US3557616A (en) * 1967-09-29 1971-01-26 Combustion Eng Particle flow sensing device

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Title
Castrodale; Piezoelectric Punch Checking Arrangement , IBM Technical Bulletin, Vol. 12, No. 9, 2 1970. *
Sharp; Piezo-electric Crystal Keyboard , IBM Technical Disclosure Bulletin, Vol. 5, No. 10, 3 1963. *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184393A3 (en) * 1984-12-05 1987-09-30 Mars Incorporated Coin checking apparatus
US4733766A (en) * 1984-12-05 1988-03-29 Mars, Inc. Coin checking apparatus
GB2173624A (en) * 1985-04-08 1986-10-15 Qonaar Corp Low power coin discrimination apparatus
US4848556A (en) * 1985-04-08 1989-07-18 Qonaar Corporation Low power coin discrimination apparatus
US4726458A (en) * 1985-07-24 1988-02-23 Andras Gati Device with a sensor for the recognition of coins
US4967895A (en) * 1987-04-16 1990-11-06 Pom, Incorporated Parameter control system for electronic parking meter
WO1990004238A1 (fr) * 1988-10-05 1990-04-19 Pom Incorporated Systeme de compensation des parametres pour parcometre electronique
US5475373A (en) * 1992-04-07 1995-12-12 Pom, Inc. Power conserving electronic parking meter
US5360095A (en) * 1992-04-07 1994-11-01 Pom Incorporated Power conserving electronic parking meter
DE19613716C1 (de) * 1996-04-01 1997-12-11 Trenner D Wh Muenzpruefer Vorrichtung zum Schalten eines Münzprüfers
EP1047026B1 (fr) * 1999-04-21 2006-04-05 Juan Munar Escandell Sélecteur pour pièces de monnaie ou jetons
WO2003071496A2 (fr) * 2002-02-25 2003-08-28 Beaver Machine Corporation Systeme de surveillance de distributeur automatique
WO2003071496A3 (fr) * 2002-02-25 2004-07-08 Beaver Machine Corp Systeme de surveillance de distributeur automatique
US20050173222A1 (en) * 2002-02-25 2005-08-11 Schwarzli Josef W. Vending machine tracking system
US7357239B2 (en) 2002-02-25 2008-04-15 Beaver Machine Corporation Vending machine tracking system
US20060070842A1 (en) * 2004-09-29 2006-04-06 Smartmech Corporation Vending machine tracking system with controlled switching device

Also Published As

Publication number Publication date
LU66942A1 (fr) 1973-04-19
AU5170873A (en) 1974-08-08
NL7301515A (fr) 1973-08-07
DE2304973A1 (de) 1973-08-30
BE794880A (fr) 1973-05-29
CA989788A (en) 1976-05-25
AU467007B2 (en) 1975-11-13
FR2170230A1 (fr) 1973-09-14
ES411238A1 (es) 1976-04-16
DE2304973B2 (de) 1976-09-16
IT984242B (it) 1974-11-20
JPS4885297A (fr) 1973-11-12
FR2170230B1 (fr) 1979-04-20

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