US2856460A - Coin identifying circuit - Google Patents

Coin identifying circuit Download PDF

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Publication number
US2856460A
US2856460A US411209A US41120954A US2856460A US 2856460 A US2856460 A US 2856460A US 411209 A US411209 A US 411209A US 41120954 A US41120954 A US 41120954A US 2856460 A US2856460 A US 2856460A
Authority
US
United States
Prior art keywords
coin
line
deposited
circuit
oscillator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US411209A
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English (en)
Inventor
Alfred H Faulkner
Robert L Huffman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Telephone Laboratories Inc
Original Assignee
General Telephone Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE535538D priority Critical patent/BE535538A/xx
Application filed by General Telephone Laboratories Inc filed Critical General Telephone Laboratories Inc
Priority to US411209A priority patent/US2856460A/en
Priority to GB2114/55A priority patent/GB765822A/en
Priority to FR1122266D priority patent/FR1122266A/fr
Priority to DEA22075A priority patent/DE1008786B/de
Application granted granted Critical
Publication of US2856460A publication Critical patent/US2856460A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/023—Circuit arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/026—Constructional features

Definitions

  • This invention relates in general to an arrangement for identifying the value of a coin deposited in a coin receiving means and more particularly to an arrangement comprising an electronic tone generator to be used with a telephone paystation and controlled by a switch arrangement in the coin receiving means for the purpose of generating electrical pulsations, dependent on the value of a coin deposited at the paystation, to thereby enable the coin to be identified.
  • the gong which is arranged to be struck by a nickel or dime vibrates at one particular frequency so that the operator identifies a nickel bythe fact that she hears one tone of the particular frequency transmitted over the coin transmitter and identifies the dime by hearing the same frequency twice in quick succession whereas the quarter gong gives rise to a vibration of another frequency which is transmitted by the coin transmitter to be heard by the operator and identified by her as a quarter.
  • This arrangement gives rise to two important difficulties in that the coin transmitter provides an undesirable impedance in the line circuit and secondly the second stroke of the dime against its gong is difficult to distinguish from the first stroke as the gong may be still vibrating.
  • the present invention eliminates these problems by providing, in place of the gongs and coin transmitter, lever controlled switches operated by the coins to control a transistor oscillator for the purpose of producing an identifiable audio frequency on the line.
  • a nickel on falling through the chute strikes one lever to control the oscillator accordingly.
  • the dime strikes another lever and the first lever to control the oscillator for the purpose of producing two separate splashes of identifiable tones of the same frequency as the nickel.
  • the quarter on deposit strikes a third lever for controlling the oscillator to produce a tone of another frequency to enable the operator to identify the quarter.
  • the transistor oscillator as shown in one embodiment is shunted from the line except for a short period when a coin is deposited and therefore it provides no impedance to the line while connections are being established or during conversation.
  • the oscillator avoids the problem of providing two distinct tones from a vibrating gong as it generaes tones onlyduring a short interval that the various levers are activated by their respective coins to close their associated switches or contacts.
  • One modification of the present invention shown herein utilizes a transistor oscillator circuit normally incomplete and connected to one side of the line at all times so that even when completed and operative practically no impedance to the line is presented.
  • Present paystation practice generally allows completion of a local call without intervention by an operator, and only on toll calls is operator control utilized. How ever, no distinction will be made between local and toll calls or postpay and prepay paystations as these factors are of no consequence in the present invention and the calling party may be considered in the present invention as completing all calls with the aid of an operator on reaching any well-known type of combined line recording trunk after dialling a preliminary digit over any well known type of finder-selector link.
  • Fig. 1 is a schematic diagram of a standard type of coin chute such as shown in the aforementioned patent modified by replacing the gongs adapted to be struck by.
  • Resistor 30 is normally short circuited and is in the line only when springs 19 and 9 or 21 and 17 are open so that at most only an impedance of ohms is added to the line and that only for an instant while a coin is deposited.
  • Levers 5, 6 and 7 are balanced on their pivots 5b, 8 and 16 respectively so that their respective coin pads 5a, 6a and 7a normally rest against the edges of their respective channel forming members adjacent their respective channel openings. Each lever is prevented from rotation until its pad is struck by a coin at which time the associated lever is moved. away from its associated channel.
  • the coin pads are attached to the coin levers for the purpose of providing a large surface to be struck by a coin as the levers themselves are wires, which do not provide sufficient surface to be sure that a coin in rolling through its channel will strike the lever more than a glancing blow.
  • the calling party deposits a nickel which on dropping through the coin chute strikes pad 6a causing lever 6 to rotate about pivot 8 and close springs 9 and 10 and open springs 9 and 19 to remove the shunt from resistor 30 and include it in the line.
  • resistor 30 As 150 ohm resistor 30 is not now shunted from the line a drop in voltage occurs across it to bias the collector 14 with respect to the base circuit and cause collector current to flow.
  • collector current flows, the base is made negative with respect to the emitter l3 and the emitter circuit begins 2,856,460 Patented Oct. 14, 1958 to draw current, thereby increasing the flow of current in the collector circuit to in turn increase current how in the emitter circuit until a saturation point in collector current flow is reached, after which both the collector and emitter current fall rapidly away.
  • the .2 mf. condenser 11 which is charged during the period that the emitter current was increasing now discharges through the 10,000 ohm resistor 12.
  • the current passing through bias resistor 30 is of course increasing and decreasing in the same time sequence to provide a corresponding voltage fluctuation in the line. After condenser 11 discharges, collector current again flows to repeat the process.
  • the current passing through resistor '30 is periodically varied at an audio frequency rate to provide a tone signal to the operator.
  • a type 1692 Western Electric transistor may be used in the present invention while the base circuit resistor 31 may be between 2,000 and 10,000 ohms dependent on the characteristics of the particular transistor.
  • a dime on deposit in the chute strikes pad a to rotate lever 5 about pivot 5b to close springs 9 and and to complete the same circuit for causing the transis'tor oscillator to provide a tone of the same frequency and in the same manner as previously described when the nickel struck lever 6.
  • Lever 5 is prevented from oscillat'ing about 511 when pad 5a strikes the edges of its respective channel forming members so that springs 9 and 10 are closed only once for a short interval when lever 5 is rotated by the dime.
  • the dime travels on down the chute and strikes pad 6a to rotate lever 6 by which time all oscillations generated by the transistor oscillator caused by operation of lever 5 have ceased, and a dist'inct tone is produced by the transistor in the same manner as previously described when the nickel rotated lever 6.
  • a quarter on deposit in the chute strikes pad 701 to rotate lever 7 about pivot 16 to open the shunt around bias resistor 30 at springs 21 and 17 so that the aforedescribed operations take place except, that as springs 18 and 17 are closed, the discharge circuit for condenser 11 is through the 10,000 ohm and 100,000 ohm resistors 12 and 20 respectively.
  • the constants of this oscillator circuit are diiferent from that previously described as the 100,000 ohm resistor 20 is now in the discharge circuit and therefore a tone of a different frequency from that generated before is now generated so that the operator may identify the depo ited coin as a quarter.
  • Lever 7 returns to normal as the coin continues to fall and is prevented from further rotation by pad 7a in a manner similar to that described.
  • the values of the resistors 12 and 20 may each be varied between 10,000 and 100,000 ohms to provide suitable tones of audio frequency and resistor 31 may be varied within the range of 2,000 to 10,000 ohms as before described dependent on the transistor used.
  • the modification shown in Fig. In of the present invention provides a normally open circuited transistor oscillator which is in shunt with the line only when a coin is deposited and therefore draws very little line current even during the period when utilized.
  • An additional lead 33 shown grounded in the subscribers line circuit is provided, however, the provision of such a lead is often standard practice for the purpose of securing additional control functions. Such a ground may be furnished from equipment other than the line circuit.
  • the operation of the coin levers is similar to that previously described with the exception that as a shunt around the transistor circuit need not be opened when a coin is deposited spring 19 is omitted and spring 21 is used for a difierent purpose.
  • the transistor circuit is open circuited unless a coin is deposited, at which time, either springs 9' and 10' are closed and opened twice in rapid succession if a dime is deposited, once if a nickel is deposited or springs 17' and 18' are closed and opened once if a quarter is deposited.
  • resistor 20' be 27,000 ohrns; resistor 12' be 47,000 ohms, resistor 31 be 47,000 ohms and condenser 11 be .22 Inf.
  • a telephone system utilizing a line for establishing a call and having a coin receiving means including a coin controlled means, said last means controlled in accordance with the denomination of a coin deposited in said receiving means, an oscillator circuit, said oscillator circuit shunted from said line by said last means so as to normally provide no impedance to said line, said last means controlled on deposit of a coin to remove said shunt and cause said oscillator to provide electrical pulsations in said line corresponding to the denomination of a coin deposited in said receiving means.
  • a line having a coin receiving means associated therewith and a coin controlled switch operated a number of times corresponding to the denomination of a coin deposited in said means, a tone generator associated with said line through contacts of said switch so that said generator is normally inoperative, operation of said switch by one coin of one denomination deposited in said receiving means rendering said generator operative and causing it to apply a tone frequency to said line for one particular time period only, operation of said switch by a coin of another denomination deposited in said receiving means rendering said generator operative a plurality of time periods and causing it to apply a tone frequency during each of said plurality of periods to said line.
  • a switch adjacent said coin chutes, said switch arranged to be operated once by a deposited coin of one denomination and arranged to be operated successively by a coin of another denomination, atransistor oscillator associated with said switch, and means controlled by said switch for causing said oscillator to generate a tone of one frequency for one time period for each operation thereof whereby a coin of one denomination is identified by said tone for one time period and a coin of said other denomination is identified by successive tones.
  • a coin receiving means is provided at said station
  • the improvement comprising a switch having several sets of contacts arranged to be operated by a coin deposited in said coin chute, and an oscillator connected to said line through one set of contacts of said switch so as to be normally inoperative and connected to said line through another set of contacts of said switch so as to provide electrical oscillations to said line conforming to the deposited coin for the purpose of enabling said coin to be identified.
  • a telephone system of the type having a .station associated with a line over which a connection and a talking circuit to a central office may be established and wherein a coin receiving means is provided at said station, the improvement comprising an oscillator connected to said line and normally ineffective to provide electrical oscillations to said line, a switch, .a pair of arms associated with said coin receiving means whereby one of said arms is operated by a coin of one denomination deposited in said receiving means to operate said switch and said one arm and the other arm are arranged to be operated successively on the deposit of a coin of another denomination deposited in said receiving means to operate said switch successively, the contacts of said switch arranged when operated by a deposited coin to connect said oscillator to said line so as to render said oscillator effective to provide a burst of electrical oscillations of a particular frequency to said line whereby a coin of one denomination may be identified and whereby a coin of said other denomination may be identified by the successive bursts of electrical oscillations provided to said line.
  • a combination for use with a coin receiving means adapted to receive coins of different denominations comprising a control means operated in accordance with the denomination of a coin deposited in said receiving means, and an oscillator circuit normally ineffective to provide electrical pulsations and controlled by said control means on operation thereof by a deposited coin of one denomination to provide one group of electrical pulsations of one of two audible frequencies dependent upon the denomination of the deposited coin and controlled by said control means on operation thereof by a deposited coin of another denomination to provide successive groups of said pulsations of one frequency.
  • said oscillator circuit comprises a transistor, a plurality of circuits each individually corresponding to different coin denominations and each controlled in response to the de posit of a coin of its individually corresponding denomination to control said transistor accordingly.
  • control means comprises a plurality of coin controlled switches each controlled in accordance with the denomination of a coin deposited in said receiving means.
  • control means comprises a switch having contacts, and means for closing said contacts once for rendering said oscillator effective to provide said one group of electrical pulsations on deposit of a coin of said one denomination and for closing said contacts twice for rendering said oscillator effective to provide successive groups of said electrical pulsations on deposit of a coin of said other denomination.
  • a combination adapted for use in a telephone system having a paystation with a coin receiving means adapted to receive coins of different denomination and wherein a talking circuit is completed from said paystation to a central office over a pair of line conductors on initiation of a call comprising an oscillator circuit, and means controlled in accordance with the denomination'of a coin deposited in said receiving means for connecting said oscillator to said line in a particular manner for a discrete time interval dependent on the denomination of a coin deposited in said receiving means so as to supply electrical oscillations to said line only during the time interval.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Telephonic Communication Services (AREA)
US411209A 1954-02-18 1954-02-18 Coin identifying circuit Expired - Lifetime US2856460A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE535538D BE535538A (en:Method) 1954-02-18
US411209A US2856460A (en) 1954-02-18 1954-02-18 Coin identifying circuit
GB2114/55A GB765822A (en) 1954-02-18 1955-01-24 Coin identifying circuit
FR1122266D FR1122266A (fr) 1954-02-18 1955-02-07 Dispositif d'identification des pières de monnaie pour systèmes de téléphonie automatique
DEA22075A DE1008786B (de) 1954-02-18 1955-02-11 Vorrichtung zur Feststellung des Wertes von Muenzen bei Muenzfernsprechern od. dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US411209A US2856460A (en) 1954-02-18 1954-02-18 Coin identifying circuit

Publications (1)

Publication Number Publication Date
US2856460A true US2856460A (en) 1958-10-14

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ID=23628029

Family Applications (1)

Application Number Title Priority Date Filing Date
US411209A Expired - Lifetime US2856460A (en) 1954-02-18 1954-02-18 Coin identifying circuit

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Country Link
US (1) US2856460A (en:Method)
BE (1) BE535538A (en:Method)
DE (1) DE1008786B (en:Method)
FR (1) FR1122266A (en:Method)
GB (1) GB765822A (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928119A (en) * 1956-12-10 1960-03-15 James C Heintz Company Tire handling apparatus for retreading molds
US3023275A (en) * 1957-06-25 1962-02-27 Ass Automation Ltd Coin collectors for telecommunication services
US3091663A (en) * 1960-12-20 1963-05-28 Bell Telephone Labor Inc Coin box telemetering arrangement
US3423533A (en) * 1964-11-19 1969-01-21 Teletek Inc Coin annunciator for telephone pay stations

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068310B (de) * 1957-06-25 1959-11-05 Associated Automation Limited, London Münzautomat für Fernmelde-, insbesondere Fernsprechanlagen
GB852198A (en) * 1957-11-06 1960-10-26 Ericsson Telefon Ab L M Improvements in or relating to apparatus for sending signals indicative of the values of coins inserted into a coin operated telephone instrument, to a control device inan automatic telephone exchange

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792651A (en) * 1927-12-29 1931-02-17 Siemens Ag Class signaling for telephone systems
US2782259A (en) * 1953-12-23 1957-02-19 Bell Telephone Labor Inc Calling subscriber identifier using transistor oscillator in subsets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE570938C (de) * 1927-12-29 1933-02-21 Siemens & Halske Akt Ges Schaltungsanordnung fuer Fernsprechanlagen mit Sprechstellen, die mit Selbstbelastungseinrichtungen versehen sind

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792651A (en) * 1927-12-29 1931-02-17 Siemens Ag Class signaling for telephone systems
US2782259A (en) * 1953-12-23 1957-02-19 Bell Telephone Labor Inc Calling subscriber identifier using transistor oscillator in subsets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928119A (en) * 1956-12-10 1960-03-15 James C Heintz Company Tire handling apparatus for retreading molds
US3023275A (en) * 1957-06-25 1962-02-27 Ass Automation Ltd Coin collectors for telecommunication services
US3091663A (en) * 1960-12-20 1963-05-28 Bell Telephone Labor Inc Coin box telemetering arrangement
US3423533A (en) * 1964-11-19 1969-01-21 Teletek Inc Coin annunciator for telephone pay stations

Also Published As

Publication number Publication date
FR1122266A (fr) 1956-09-04
GB765822A (en) 1957-01-16
DE1008786B (de) 1957-05-23
BE535538A (en:Method)

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