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Publication numberUS3506104 A
Publication typeGrant
Publication dateApr 14, 1970
Filing dateJul 17, 1968
Priority dateJul 20, 1967
Also published asDE1574225B1
Publication numberUS 3506104 A, US 3506104A, US-A-3506104, US3506104 A, US3506104A
InventorsBernhard Kaiser, Ortwin Wokock
Original AssigneeKienzle Apparate Gmbh
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Coin testing arrangement for vending machines
US 3506104 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

A i d114, 1970 v ETAL 4 3,506,104

COIN TESTING ARRANGEMENT FOR VENDING MACHINES Filed July 1'7, 1968 FIGTZQ FlG.2b I F|G.2c

INVENTORS Bernhor-d KALSER Ortwin WOKOCK their ATTORNEY United States Patent 3,506,104 'COIN TESTING ARRANGEMENT FOR VENDING MACHINES Bernhard Kaiser, Villingen, Black Forest, and Ortwin Wokiick, Schwenningen, Germany, assignors to Kienzle Apparate G.m.b.H., Villingen, Black Forest, Germany Filed July 17, 1968, Ser. No. 745,581 Claims priority, application Germany, July 20, 1967, K 62,886 Int. 'Cl. G07f 3/02 US. Cl. 194102 10 Claims ABSTRACT OF THE DISCLOSURE A coin testing arrangement has a guiding structure for guiding tran ported coins, and including a slanted guide surface for guiding the rim of each coin so that coins of different thickness project different distances toward a sensing means which assumes different positions in accordance with the thickness of tested coins, and starts the vending machine only when sensing a coin of standard thickness.

BACKGROUND OF THE INVENTION Vending machines, particularly parking meters, are known, in which a testing device is provided for sensing the diameter of each inserted coin, and controlling the machine so that the same starts an operation only if a standard coin having the correct diameter is inserted so that false coins and slugs cannot start an opeartion. The coin testing apparatus according to the prior art is incapable of distinguishing between coins having the same diameter, but different thickness, which may have different monetary values. Counterfeit coins and slugs having the correct diameter, but different thicknesses cannot be detected by the prior-art constructions.

SUMMARY OF THE INVENTION It is one object of the invention to provide a coin testing device capable of distinguishing between coins having the same diameter, but different thickness.

Another object of the invention is to provide a vending machine, such as a parking meter, with a simple and reliable testing device permitting an operation only if an inserted coin has a predetermined diameter and a predetermined thickness.

Another object of the invention i to provide a coin testing arrangement which distinguishes between the rim of a standard coin, and the sharp annular edges of a turned or stamped-out metal plug.

With these objects in view, a coin testing arrangement according to the present invention is characterized by a slanted guide surface on which the rim of the tested coin is located during the sensing operation. The slanted guide surface may be provided on a guide structure, or on a sensing means, or slanted guide faces may be provided on both. The slanted guide surface may be a continuous surface, or have several steps, and the angle of the slanted surface is preferably between 30 and 45 Coins of different thickness engage different points of the slanted guide surface so that coins having the same diameter but different thicknesses assume different positions which can be sensed.

Preferably, the coin is pressed by a spring against a guide surface which guides one lateral face of the coin, and the slanted guide faces of the guide structure and of the sensing means define acute angles with the lateral guide surface.

The particular advantage of the slanted surfaces is that the testing arrangement can be universally used for all kinds of coins even in parking meters which are deice signed for the use of different coins. Another advantage is that not only the thickness of the coin can be used as a distinguishing characteristic for determining whether the coin is real or counterfeit, but also that the condition of the edges of the rims of the coin has an influence on the testing. This is due to the fact that real coins are generally without sharp edges along the rim, whereas turned and stamped-out plugs have sharp edges which influence the position of the rim on the slanted surfaces. Real coins have slightly rounded-off edges along the rim.

If distinguishing between coins having different types of edges is not desired, and the testing of the thickness is only used for one particular coin, instead of a continuously slanted guide surface also a stepped guide face can be used which may have, for example, three steps of different height and width.

One embodiment of the invention comprises a guiding structure for guiding coins and including a first guide surface for guiding one lateral face of each coin, and a second guide surface for guiding a first rim portion in the region of the other lateral face of the coins, the second guide surface being slanted towards the first guide surface so that second rim portions located diametrically opposite the first rim portions are spaced from the lowest point of the slanted second guide surface the farther the thicker the coin is, transporting mean for transporting the coins along the first and second surfaces, and sensing means for sensing the second rim portions of the coins and being moved to an operative position for starting an operation of the vending machine only by the second rim portion of a transported standard coin having a standard thickness, and being moved to inoperative positions by the second rim portions of unacceptable coins whose thickness is different from the thickness of a standard com.

The sensing means preferably includes a sensing memher having a first guide face at least partly located in the same plane as the first guide surface, and a second guide face slanting upward toward the first guide face. The first guide face guides a lateral face of the transported coins, and the second guide face guides the second rim portion of the transported coins so that the sensing member is moved the farther away from the guide structure, the greater the thickness of the sensed coin is.

The novel features which are considered a characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a fragmentary perspective view illustrating a coin testing arrangement in accordance with one embodiment of the invention;

FIGS. 2a, 2b, and 2c are sectional views illustrating the positions of three coins of different thickness while being sensed by the apparatus of FIG. 1; and

FIG. 3 is a fragmentary sectional view illustrating a detail of the testing apparatus on an enlarged scale.

DESCRIPTION OF THE PREFERRED EMBODIMENTS This invention is a further improvemnt of the Time Vending Machine shown in our copending application of B. Kaiser et al., Ser. No. 576,950, filed Sept. 2, 1966, now Patent No. 3,391,772.

FIG. 1 shows a coin 1 in a position in which it is being tested. Coins 1a, 1b and 1c of different thickness are illustrated in the same testing position in FIGS. 2a, 2b,

and 2c. Coin 1 in the position of FIG. 1 was inserted at the level of the release lever 3, and has been transported by a transporting finger 3 on a transporting wheel rotating in counterclockwise direction while being guided with one lateral face along the guide surface 4 of a stationary plate 4. At the same time, the rim of coin 1 rests on a guide surface 2 which is slanted to guide surface 4', as best seen in FIG. 2a. A resilient leaf spring 5 is secured to plate 4 and has a portion located the other lateral face of the coin, pressing the same against guide surface 4'. Guide surface 2 slants downward toward guide surface 4 at an acute angle between and Due to the slant of guide surface 2, not the entire cylindrical rim, but only one circular edge of the rim rests on the slanted guide surface 2, as best seen in FIGS. 2.11 to 2c. A sensing level 9 is mounted on pivot 9 for angu lar movement, and carries a sensing member in the form of a pin 6. Sensing member 6 has a recess formed by an upwardly slanted guide face 7, and by a guide face 8 which is located in the same plane as guide surface 4. The guide surface 8 has a planar surface portion engaging the highest portion of the coin, and a sloping surface portion which slopes away from the lateral face of the coin to a point located outside of the plane in which guide surface 4' is located. The sloping surface portion may be of conical configuration and guides the coin, which is transported by transporting finger 3' in counterclockwise direction as viewed in FIG. 1, until a rim portion diametrically opposite the rim portion guided on guide surface 2, is located in the recess formed by the slanted guide face 7 and by the guide face 8.

A coin 1a of standard thickness will place sensing member 6 in the position of FIG. 2a so that the axis of sensing member 6 coincides with an imaginary axis 20. A thinner coin 1b will not displace sensing member 6 so far, as shown in FIG. 2b, and a thicker coin 10 will dis place sensing member farther than a standard coin 1a, aithough all three coins are assumed to have exactly the same diameter.

Lever 9, which carries sensing member 6, is displaced to different angular positions when coins of different thickness are sensed by sensing member 6. Lever 9 carries a gear sector 10 meshing with a pinion 11 secured to a testing disk 12. At least one tab 13 is mounted on testing disk 12 and represents by its circumferential position the diameter of a desired standard coin. Tab 13 carries an arresting pin 14, cooperating with a catch hook 15 which is mounted on a lever 16 whose angular displacement is limited by a stationary stop pin 16a located in a slot 16b of lever 16. The position of tab 13 is sensed by a pin 19 on a feeler lever 21.

A spring 17 is secured to an eccentric point of testing wheel 12 and tends to turn the same in clockwise direction, as viewed in FIG. 1, together with pinion 11 so that the same turns gear segment 10 and thereby sensing lever 9 with sensing member 5 in counterclockwise direction toward the sensing position and beyond the same to a terminal position in which a stop 18 on testing wheel 12 engages an abutment.

When a coin 1 is transported along guide surfaces 2, 4', it arrives in the sensing position shown in FIG. 1 in which sensing means 6, 9 is displaced in counterclockwise direction against the action of spring 17 so that testing disk 12 turns in counterclockwise direction an angle depending on the diameter of the tested coin. If the same is a real coin having the correct diameter and thick mess, the angle about which testing disk 12 turns with tab 13 and arresting pin 14 is just right to place arresting pin 14 in the hook 15 on the spring biased lever 16 so that testing disk 12 is momentarily arrested, and spring 17 cannot turn testing wheel 12 back in clockwise direction. in this position, tab 13 is located in a desired circumferential position indicating a good coin, and this position is sensed by the feeler means 19, 21 which through a known mechanism, not shown, sets the pointer of the parking meter to a time corresponding to the value of the inserted coin 1.

In the apparatus according to the prior art, in which no slanted guide surfaces 2 and 7 are provided, an unacceptable coin having a smaller diameter than a standard coin will permit a greater displacement of lever 9 so that arresting pin 14 will reach only the position B shown in FIG. 3, and will not be caught by catch hook 15. Consequently, spring 17 will turn testing disk 12 with tab 13 in counterclockwise direction when coin 1 has been transported beyond the sensing means, and feeler means 21, 19 will not sense tab 13 and consequently not render the parking meter operative. If the coin has too great a diameter, lever 9 will be farther displaced and testing wheel 12 will turn to a position in which arresting pin 14 is located in the position C in FIG. 3 so that it will not be caught by the catch hook 15, but permitting spring 17 to turn testing disk 12 in clockwise direction with tab 13, while arresting pin 14 moves over the outside of hook 15. Since tab 13 is not arrested in the correct position, it cannot be sensed by the feeler means 21, 19. In accordance with the present invention, all tested coins are assumed to have the same diameter, but to have different thickness.

As shown in FIG. 2a, a real coin 1a having standard diameter and thickness, and engaging with diametrically located rim portions the slanted guide faces 2 and 7, will place sensing member 6 exactly the imaginary axis 20 in which lever 9 is positioned as shown in FIG. 1 to place testing disk 12 with tab 13 in the illustrated position in which arresting pin 14 caught by catch hook 15 so that the correctly positioned tab 13 can be sensed by feeler means 21, 19, by which the pointer of the parking meter is set to indicate the time period bought by the respective coin.

A thinner coin 1]:- will not displace sensing member 6 and lever 9 as far as a real coin 1a since diametricaliy located rim portions thereof are located on the farthest spaced portions of the slanted guide surfaces 2 and 7. Consequently, the effect on the sensing means 6, 9 will be the same as if a coin of smaller diameter would have been inserted, and testing disk 12 with arresting pin 14 is turned only to the position B in FIG. 3 so that feeler means 21, 19 cannot sense tab 13, and consequently does not start the parking meter. Testing disk 12 with arresting pin 14 is turned back in clockwise direction when coin 1b haspassed sensing member 6 and turns to an initial position in which pin 19 abuts the stop 18 so that feeler lever 21 cannot set the pointer of the parking meter to a starting position.

If a coin 1c thicker than a standard coin is inserted, diameterically located rim portions thereof engage the closest spaced surface portions of guide surfaces 2 and 7 so that sensing member 6 is displaced beyond the standard position defined by the imaginary axis 20, as shown in FIG. 2c.

Bue to the wide angular displacement of lever 9 by the sensed thick coin In, testing disk 12 is turned beyond the position shown in FIG. 1 and arresting pin 14 moves beyond hook 15 to the position C. Since book 15 cannot arrest testing wheei 12 by catching arresting pin 14, testing disk 12 with tab 13 is returned in clockwise direction by spring 17, and since feeler means 21, 19 does not sense a tab 13 in the correct position, the parking meter is not started.

Only when a standard coin is sensed, catch hook 15 catches arresting pin 14 in the position A shown in FIG. 3, so that tab 13 is correctly positioned and can be sensed by feeler means 21, 19, resulting in starting of the parking meter.

Since a very steep slant of guide surface 2 may cause wedging in of a tested coin, and furthermore since even very small differences in the thickness of the coins, and in the sharpness of the rim edges are to be sensed, it is preferred to provide in addition to the slanted guide face 2, also the slanted guide face 7 in the sensing member 6, but the device could function with only a single guide face 2 in the supporting structure, or with only a single guide face 7 in the sensing member 6.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of testing devices for vending machines differing from the types described above.

While the invention has been illustrated and described as embodied in a testing device for a vending machine responding to different thicknesses of coins having the same diameter, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can be applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the specific or generic aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is:

1. Coin testing arrangement for vending machines, comprising, in combination, first means having a first guide surface for guiding one lateral face of a coin and a second guide surface slanted to said first guide surface and guiding a first rim portion in the region of the other lateral face of the coin so that a second rim portion located diametrically opposite said first rim portion is spaced the farther from the point of said slanted first guide surface adjacent said second guide surface the thicker the coin is; and second means engaging said second rim portion, one of said first and second means being movable for sensing the displacements of coins having different thickness.

2. Coin testing arrangement for vending machines, comprising in combination, a guiding structure for guiding coins having the same diameter, and including a first guide surface for guiding one lateral face of each coin, and a second guide surface for guiding a first rim portion in the region of the other lateral face of said coins, said second guide surface being slanted downward toward said first guide surface so that second rim portions located diametrically opposite said guided first rim portions are spaced from the lowest point of said slanted second guide surface the farther the thicker the coin is; transporting means for transporting said coins along said first and second guide surfaces; and sensing means for sensing said second rim portions of said coins and being moved to an operative position for starting an operation of the vending machine only by the second rim portion of a transported standard coin having a standard thickness, and being moved to inoperative positions by the second rim portions of unacceptable coins whose thickness is different from the thickness of a standard corn.

3. Coin testing arrangement as claimed in claim 2 wherein said transporting means transport said coins along a circular path in which said sensing means is located; and wherein said second guide surface is partcircular and has the center thereof located in the center of said circular path.

4. Coin testing arrangement as claimed in claim 2 wherein said guide structure includes resilient means abutting the other lateral face of the transported coins for urging the same into sliding contact with said first guide surface.

5. Coin testing arrangement as claimed in claim 2 wherein said sensing means includes a spring-biassed lever, and a sensing member carried by said lever and projecting into the path of movement of said second rim portions of said transported coins so that said lever is displaced a predetermined angle by said second rim portion of a standard coin, and is displaced different angles by said second rim portions of unacceptable coins; and comprising means controlled by said lever for starting an operation of said vending machine only when said lever is displaced said predetermined angle.

6. Coin testing arrangement as claimed in claim 2 wherein said sensing means includes a sensing member having a first guide face at least partly located in the same plane as said first guide surface, and a second guide face slanting upward toward said first guide face, said first guide face guiding said one lateral face of said transported coins, and said second guide face guiding said second rim portion of transported coins in the region of the other lateral face of said transported coins whereby said sensing member is moved the farther away from said guide structure the greater the thickness of the sensed coin is.

7. Coin testing arrangement as claimed in claim 6 wherein said first guide face of said sensing member has a sloping guide surface portion extending from a point outward of said plane into the same for engaging said second rim portions in the region of said one lateral face of transported coins and for guiding the same into contact with said second guide face.

8. Coin testing arrangement as claimed in claim 2 wherein said sensing means includes a spring-biased lever, and a sensing member carried by said lever and projecting into the path of movement of said second rim portions of said transported coins, said sensing member having a recess bounded by a first guide face at least partly located in the same plane as said first guide surface, and a second guide face slating upward toward said first guide face, said first guide face guiding said one lateral face of said transported coins, and said second guide face guiding said second rim portion of transported coins in the region of the other lateral face of said transported coins so that said lever is displaced a predetermined angle by said second rim portion of a standard coin, and is displaced different angles by said second rim portions of unacceptable coins; comprising means controlled by said lever for starting an operation of said vending machine only when said lever is displaced said pretermined angle.

9. Coin testing arrangement as claimed in claim 2 wherein said slanted guide surface has a plurality of steps.

10. Coin testing arrangement as claimed in claim 2 wherein said second guide surface is slanted to said first guide surface at an angle of between 30 and 45.

References Cited UNITED STATES PATENTS 3,289,802 12/1966 Greenwald et al 194-99 STANLEY TOLLBERG, Primary Examiner

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3289802 *Apr 9, 1965Dec 6, 1966Greenwald HarryCoin rejector mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4577744 *Oct 27, 1982Mar 25, 1986Joel DoucetMulticoin discriminator
US4741427 *Oct 10, 1985May 3, 1988Nathan ChoderkerCoin acceptor with final size gauge system
US4807737 *Jan 27, 1987Feb 28, 1989Kienzle Apparate GmbhManually actuated, self-collecting parking meter
US5657848 *Dec 19, 1995Aug 19, 1997Machine-O-Matic LimitedFor a vendor
US6076650 *Apr 7, 1998Jun 20, 2000Machine-O-Matic LimitedCoin mechanism with coin slot blocking system
Classifications
U.S. Classification194/335
International ClassificationG07F17/24, G07F5/02
Cooperative ClassificationG07D5/02, G07F17/24
European ClassificationG07D5/02, G07F17/24