Telephone system.

Abstract

Claims

F. A. LUNDQUIST. TELEPHONE SYSTEM. APPLICATION FILED 110114, 1912. Patented Spt.15,1914. "E NORRIS PETERS CD1. PHOHJ-LIT'HO.v WA HNGTON, D. C. mechanism located at the substation, to-v rrnn s'ra'rns Irarnn'r ems. FRANK A. LUNDQUIST, OF CHICAGO, ILLINOIS, ASSIGNOR '10 WESTERN ELECTRIC COMPANY, OF NEW YORK, Y., A CORPORATION OF ILLINOIS. TELEPHONE SYSTEM. Specification of Letters Patent. Patented Sept. 15, 1914. Application filed. November 14, 1912. Serialllo. "$31,323. To aZZ whom it may concern Be it known that I, FRANK A. LUND- QUIST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Telephone Systems, of which the following is a full, clear, concise, and exact description. This invention relates to improvements in telephone toll line systems and more particularly to those systems wherein a coin or token is collected each time a subscriber originates a successful call. 7 The object of this invention is to provide a coin collector mechanism and controlling apparatus adapted to be connectedthereto which will constitute a reliable and efficient system for collecting or refunding the tokens without the necessity of employing polarized electromagnets. The means by which this object is accomplished will be fully understood from the following description taken in connection with the accompanying drawing, and will be particularly pointed out in the appended claims. in the drawing, Figure 1 is a side elevation partly in section of the coin collector gether with the apparatus and circuit connections at the central olfice, by means of which the coins are refunded or collected; Fig. 2 is a front elevation of the coin collector mechanism. At the local or subscribers statlon A, n addition to the usual means for transmitting and receiving speech, is located a coin collecting mechanism which is connected to a central station B by means of a telephone line C. Eor the sake of clearness, the usual operators telephone apparatus and the means for connecting to a called line have been omitted, but it is to be understood that any of the means known in the art may be employed. The coin collecting mechanism consists of a zig-zag coin chute 5 provided at its lower end with a deposit channel 6, leading to the cash box, and a refund channel 7 leading to a refund cup 8. Projecting into the upper part of the coin chute 5 is a pivoted lever 9 and a movable arresting pin 10. A coin descending the chuteis held between the lever 9 and the pin 10 until released as hereinafter described. The weight of the coin resting channel 6 into the cash box. on the free end of the lever 9 causes it to move about its pivot to close a contact between the springs 11 and 12. Secured to the frame of the coin collector is an electromagnet 15 provided with an armature 16 pivoted at 17. Projecting upward and connected to the armature 16 is a rod 18 to the upper end of which the pin 10 is fastened. The rod 18 is also connected to a contact spring 19 by means of an insulating con nection 20, The armature 16 is likewise provided with two downwardly projecting rods or levers 21 and 22 located on opposite sides of the pivotal axis 17. The rod 21 is provided with two laterally projecting pins 23 and 2a which are adapted to be moved into the chute 5 through openings in the wall thereof, although normally located outside of the chute. When inserted into the chute the pin" 23 obstructs the opening into the refund channel 7. The rod 22 is provided with a laterally projecting plate 25 which is normally positioned to obstruct the deposit channel 6 by extending through an opening in the wall of the coin chute above the opening thereof, but which may be withdrawn as hereinafter described. When in its normal position, the plate 25 prevents coins from passing through the deposit A pivoted lever 26 projecting into the deposit channel 6 controls the contact between springs 27 and 28, which, normally rest together, and is adapted to opensuch contact when the free end thereof is depressed by a coin. The pin 24 is so placed that when inserted into the deposit channel, a coin passing therein is arrested in contact with the lever 26 causing the contact springs 27 and 28 to be separated. When the pin 24 is withdrawn, the coin may pass on into the cash box. The electromagnet 15 may be energized to attract its armature 16 as hereinafter described and when thus attracted the armature 16 rotating about its axis 17 withdraws the pin 10 from the chute and the plate 25 from the opening into the deposit channel 6. At the same time the pins 23 and 2t are inserted into the chute. The telephone line C is connected'to the spring 11 and the spring 12 is provided with a path to ground through conductors 30 and 31, the coils of the electromagnetlf), conductor 32, and springs 27 and 28. A branch circuit to ground through thee1ectromagnet is provided around the contacts 11 and 1.2, when the pin is withdrawn from the chute, by means of conductor 33, contact spring 19, a second spring 34, conductors and 31, thecoils of electromagnet 15, conductor 32, and contact springs 27 and .28. It will thus be apparent that when the electromagnet is energized to attract its armature 16 to withdrawthe pin 10 releasing an arrested coin,.a circuit is formed independent of .the coin actuated contact 1112 and the energizing current through the electromagnet is not interrupted at this point. 7 At the central station B the telephone line C is connected to a spring of the usual telephone spring jack. A spring 41 is normally in contact with spring 40 and is joined by a conductor 42 of the winding of a relay 43. The other end of the winding of the relay 43 is connected to a battery 44 by means of conductors 45, 46, 47 and 48. One side of the battery 44 is grounded and armature 50 of the relay 43 is likewise grounded through conductors 51 and 52. An armature contact 53 of relay 43 is connected by a conductor 54 to one terminal of a signal lamp 55, the other terminal of which forms a common connection for the conductors 45 and 46. One terminal of the usual jack plug 56, in the illustrated circuit the tip, is joined by a conductor 57 to a key lever 58 of a circuit closer or refund key 59. second circuit closer or deposit key 60 has its'lever 61 joined by a conductor 62 to a contact point 63 of the key 59, Which is normally in contact with the lever 58 thereof but which may be separated therefrom upon the actuation of the key 59. The coil of a relay 70 provided with a movable armature 71 has a path to the bat tery 44 through conductors 72 and 48, while the opposite terminal of the relay 70 is connected by means of conductors 73 and 74 to a normally open contact point 75 of the deposit key 60. Abranch circuit is provided around the key 60 to the line C, when the armature 71 is attracted by means of a con ductor 76, armature 71, front contact 77, and conductor 78. A signal may be provided to notify the operator that collection I has been made by providing the relay 70 with a second armature 80 connected to a grounded terminal of battery 81. It is to be understood that it is preferred to use only one battery, although two are shown for the sake of clearness. A front contact 82 for V the armature 80 is connected by a conductor 83 to one terminal of a signal lamp 84, the other terminal of which is joined .to the ungrounded pole of battery 81 by conductor 85. I .The coil of a second relay 90 is provided with a path to battery 44 through cond ctor s 2, 47 and. 48. It likewise provided with a normally closed path to the key '59 through conductors 93 and 94, back contacts 95 and 96 and conductor 97 toa normally open point '98 of the key59; and a normally open path to the key 59 through conductor 93, armature 99, front contact 109, conductor 101, to a normally open point 102 of the key 59. A signal lamp 110 has oneterminal connected to'a front contact 111 of the relay 90-by a conductor 112; the other terminal of the signal lamp forms a common connection for conductors 91 and 92. The lever 113 of the key 59 connected to but insulated fromthe lever 58 by the insulating connection 114, is oined to the conductor 52 by a conductor 115. The operation of the system is as follows: A subscriber desiring to obtain a connection deposits a coin or token into the coin chute 5 of the coin collector. The coin is held by the arresting pin 10 in contact with the lever 9 which moves about its pivot joining contact springs 11 and 12. A circuit is thus established to the central office as follows: Ground at the substation, contact springs 28 and 27, conductor 32, coil of electromagnet 15, conductors 31 and 30, contact springs 12 and 11, telephone line C, jack spring 40, con tact spring 41, conductor 42, coil of relay 43, conductors 45, 46, 47 and 48, battery 44 to ground. The relay 43 is preferably of comparatively high resistance relative to the coils of the electromagnet 15 so that when connected in series the voltage of the battery 44 is sufficient to operate the former but will not cause the electromagnet 15 to attract its armature. Upon drawing up its armature the relay 43 closes a circuit from ground at bat-j front contact 53, conductor 54, lamp 55, conductors 46, 47 and 48' to battery 44 and ground. The lamp signal 55 is thus lighted, notifying the central office operator that a connection is desired. The operator thereupon inserts one of the answering plugs 56 into the, proper spring jack opening the contact between springs 40 and 41. This tery 44, conductors 52 and 51, armature 50, breaks the circuit for the relay 43 and extinguishes the lamp 55. Upon ascertaining the wants of the subscriber the, operator completes the connection by means, not shown, which are well known in the art. If the call is successful the operator presses the deposit key 60 completing a circuit for the electromagnet 15 as followsz Ground at the substation, contact springs 28 and 27, conductor 32, coils of electromagnet 15, conductors 31 and30, contact springs/12 and 11, telephone line C, jack spring 40, tip of the plug 56, conductor 57, contact 58-63, conductor 62, key lever 61, contact 75, conductors 74 and 73, relay 70, conductors 72,and 48, battery 44 to ground. The relay 70 is of low resistance and both it and the electromagnet 15 are operated. At the substation the armature 16 is attracted, withdrawing the pin 10 and the obstructing plate 25,-while the pins 23 and 24 are inserted into the "chute. The release of the coin opens the contact between springs 11 and 12 but the actuating circuit is not interrupted since the branch circuit composed of conductors 33, 34 and 35 is closed at 1934. At the central office the actuation of relay closes a branch circuit from ground at battery 44, conductors 4S and 72, relay 70, conductors 73 and 76, armature 71, front contact 77, conductors 78 and 57 to line C. It will thus be apparent that the circuit energizing the electromagnet 15 is independent of the key 60 after the key has once been operated. [At the same time, the local cir-' cuit for the lamp 84 is closed from ground at battery 81, conductor- 85, lamp 84, conductor 83, front contact 82, armature to ground, notifying the operator that the coin is being deposited. The coin continuing down the coin chute is prevented from entering the refund channel 7 by means of the pin 23 and finally lodges'between the pin 24 and the lever 26. The weight of the coin opens the energizing circuit at the contact springs 27 and 28 which causes the armature 16 of the electromagnet .15 and the armatures 71 and 80 of the relay 7 O to be released. The former causes the arresting pin 24 to be withdrawn from the channel 6 allowing the coin to pass into the cash box. The latter opens the branch and si 'nal lamp circuits and the operator is notified by the extinguishing of lamp 84 that the collection is completed. The withdrawal of plug 56 from .the spring jack places all of the apparatus in normal position. If on the other hand, the call is unsuccessful, the operator presses the refund key 59 with the following result: A circuit is closed from ground at the substation, contact springs 28 and 27, conductor 32, coils of electromagnet 15, conductors 31 and 30, contact springs 12 and 11, telephone line C, jack spring 40, tip of the plug 56, conductor 57, key lever 58, contact 98, conductor 97, armature contacts 96 and 95, conductors 94.and 93, coil of relay 90, conductors 91, 92, 47 and 48, battery 44 to ground. The relay 9O likewise being of low resistance, both it and the electromagnet 15 attract their armatures. The attraction of armature 16 releases the coin and completes the branch circuit through the contact springs 19 and 34 as hereinbefore described. The attraction of armature 99 of relay breaks the energizing circuit at the contacts and 96 and completes a locking circuit from ground at battery 44 through conductors 48, 47, 92 for the lamp 110 through the conductor 112 and the front contact 111 so that the operator is notified that the coin is being refunded. The energizing circuit is thus opened almost immediately after it is closed by the operator, the time the circuit is closed, however, being sufficiently long to release the coin. The interruption of the circuit, as hereinbefore described, causes the electromagnet 15 to release its armature 16 before the coin has reached the branch channels allowing the pin 23 to be withdrawn from in front of the refund channel 7 and inserting the obstructing plate 25 into the coin chute in front of the opening into the deposit channel 6. The coin is, therefore, deflected into the refund channel 7 to the refund cup 8 where it may be removed by the subscriber. The withdrawal of the plug 56 from the spring jack and the release of the key 59 causes the circuit to revert to its normal condition. If preferred, the contact springs 27 and 28 controlled by a coin passing down the deposit channel 6 may be placed in parallel with the coils of the electromagnet -15 so that instead of opening the actuating circuit, a low resistance path around the electromagnet isprovided, which will withdraw enough of the energizing current from the coils thereof to cause the armature 16 to be released. With this arrangement the contact springs 27 and 28 are normally held open to be closed by a coin resting between the lever 26 and the pin 24. What I claim is: 1. Ina telephone system, the combination of a telephone line, a source of current therefor, an electromagnet at a substation controlling the disposition of a deposited coin, circuit closers at the central oflice for connecting said source of current to said'electromagnet over the telephone line, means at the central ofiice for insuring the continuancy of said circuit independently of said circuit closers, and means at the substation adapted to open said circuit independently of said circuit closers.- 2. In a telephone system, the combination of a telephone line, a source of current therefor, an electromagnet at a substation controlling the disposition of a deposited coin, a circuit closer at the central oflice for connecting said source of current to said electromagnet over the telephone line, a branch circuit for said circuit closer and means in said branch circuit made operable by said circuit closer for insuring the continuancy of said circuit independently of said circuit closer. 3. In a telephone system, the combination of a telephone line, a source of current therefor, an electromagnet at a substation controlling the disposition of a deposited coin, a circuit closer at a central Office for connect- 7 ing saidsource of current to said electromagneticver the telephone line, and means at the central station'made operable by vactuat ng said circuit closer for d1sconnect- 111g said source of current from said telephone line. 4C. In a telephone system, the combination of a coin chute at a substation having deposit and refund channels, coin arresting means in said chute, movableobstructions in the .dep osit and refund channels, an electromagnet controlling the operation of said arresting means and said obstructions, a tele phone line from the central oilice to said electromagnet at a substation, a source of current therefor, manual means at a'central office for completing a circuit for said source of current and said electromagnet through c said telephone hne, electromagnetic means :at the central oflic'e for holding said circuit closed after the operation of said manual means, and com" operated means at the substation for controlling the operation of sald ,7 electromagnetic means. 1 of a com chute at a substation havmg de- 5. In a telephone system, the combination posit and refund channels, coin arresting means in said chute, movable obstructions in the deposit and refund channels, an electromagnet controlling the operation of said arresting means and said obstructions, a telephone line from a central office to said electro-magnet at a substation, a source of ourrenttherefor, manual means at the-central "oflice' for complet ng a circuit from said source of current to said electromagnet over means. a said telephone line, and electromagnetic means at the central office for openingsaid circuitvafter the actuation of said manual 6. The combination with a coin, chute provided with coin collecting and coin refunding channels, a magnet for controlling the open and closed conditions of said channels, said parts being'at a local station, and 7 connections from said chute andmagnet to a central office, of two keys located at the central oiiice either of which keys serves to complete a preliminary circuit through the magnet at the local station, a magnet at the central office: associated with one key and adapted upon actuation to break the circuit for the magnet at the local station, and a second magnet of the central office adapt- .ed upon actuation to hold the circuit closed tion of the coin controlling rmagnetbeing V with one of the circuitcontrolling magnets such circuit controlling magnet will operate to maintain a circuit through the coin eontrolling magnet,and means by which upon such operation ofthe coin controlling mag- 7 not being withthe other of the circuit controlling magnets such other magnetwill operate to immediately break the circuit through the coin controlling magnet. ' .8. In atelephone system, the combination with two magnets, one of which is located 7 5 at the central oilice, the other at the substation, circuit connections, and a key by which said magnets are included in series in an electric circuit, of means by which the, operation of one of said magnets closes a -multiple,branch for itself and breaks the circuit through the other of said magnets, and a signal for indicating the completion of such operation. 9. In a telephone system, the combina- .85 tion withtwo magnets, one of which is 10 cated at the central oflice, the other atthe substation, circuit connections therefor, and means by which said magnets are'included in series in an electric circuit, of coin con- 9 trolling devices moved by operationof one of said magnets, and means controlled by the other-magnet for breaking the circuit of the first named magnet. I I 1.0. In a telephone system, the combination with two magnets, one of which is located at the central oi'lice, the other at the substation, circuit connectionstherefor, and means by which said magnets are included i in series in said connections, of coin 'controlling devices operated by i one i of said; magnets, means controlled by the other' magnet for closing a multiple branch for itself and for breakingthe branch through the first mentionedmagnet, and a signaling device for indicating that the second magnet has completed its control over theifirst magnet. 11. The combination with a coin chute provided with coin collecting and coin retopic; at this patent may be obtained for five cents each, by addressing the Commissioners! late'ntsj Washington, D. 0".

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