US1204399A - Lock out system for party-line telephones. - Google Patents

Description

J. W. BOWLEY.

LOCK-OUT SYSTEM FOR PARTY LINE TELEPHONES.

APPLICATION men on. 9. 1914.

1,204,399. Patented Nov. 14, 1916.

3 SHEETS-SHEET I Elmanwtox J. W. BOWLEY.

'LOCK-OUT SYSTEM FOR PARTY LINE TELEPHONES.

APPLICATION FILED ocr. 9, 19m.

152043399. Patented Nov. 14, 1916.

3 $HEETSSHEET 2.

avmrzvxtoz Jose nil William B0 WZEy,

J W. BOWLEY.

LOCK-OUT SYSTEM FOR PARTY UNE TELEPHONES.

APPLICATION FILED OCT. 9. 1914.

1,294,39 Patented Nov. 14, 1916.

3 SHEETS-SHEET 3 anuzwboz W as Jaw 22h WEZZamBoWZe attain;

ilhll'lEli STATE PATENT @FFEQE.

JOSEPH WILLIAM BOWLEY, 0F SIMPSON, SASKATCHEWAN, CANADA.

LOCK OUT SYSTEM F01?! PARTY-LINE TELEPHONES.

To all whom it may concern Be it known that I, JOSEPH WILLIAM BowLnY, a subject of the King of Great Britain, residing at Simpsomin the Province of Saskatchewan and Dominion of Canada, have invented new and useful Improvements in Lock Out Systems for Party-Line Telephones, of which the following is a specification.

This invention relates to improvements in look out systems for party line telephones and has particular application to manually controlled lock out systems for rural telephone lines.

In carrying out the present invention, it is my purpose to provide a lock out system for party line telephones whereby the calling subscriber after obtaining communication with the called subscriber may lock out the remaining telephone sets on the line so that it will be impossible for the remaining subscribers to listen in and whereby any one of the remaining subscribers upon removing his or her receiver from the hook will be automatically advised, through the medium of a signal, that the line is busy.

It is also my purpose to provide a system of the class described whereby the exchange operator will be advised when the line is busy and whereby any one of the subscribers may signal the exchange operator as when it is desired to talk over long-distance.

"With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawings: Figure 1 is a diagrammatic view of a three party line telephone system equi ped with a lock out constructed in accordance with the present invention, two of the telephone sets being shown as interconnected for talking communication, while the third set is locked out. Fig. 2 is a diagrammatic view of the exchange station showing the circuit connections between such station and a subscribers telephone set. Fig. 3 is a view in side elevation of the receiver controlled contacts. Fig. 4 is a similar view of the re ceiver controlled switch. Fig. 5 is a view in side elevation of a relay. Fig. 6 is a like view of a polarized bell to perform the functions of a relay and bell. Fig. 7 is a similar view of a relay adapted to be connected in series with an ordinary bell.

Specification of Letters Patent.

Patented Nov. 14., ieie.

Application filed October 9, 1914. Serial No. 865,904.

Referring now to the drawings in detail, 1 designates the line wires, while 2, 3 and 4: ndlcate sets of telephone instruments havmg the circuit wires 5 and 6 thereof terminally connected with binding posts 7 and 8 respectively, which latter are, in turn, connected in multiple with the lines wires 1 by way of conductors 9.

Associated with each set of telephone instruments connected with the line wires is a low resistance relay 1O controlling a break in the circuit wire 5 of the telephone set. In the present instance, this relay comprises a pair of electromagnets 11 having the lower ends of the cores thereof mounted upon a base 12, and an armature 13 pivoted at one end as at 14; and disposed within the influence of the poles of the magnets 11. The pivoted end of the armature 14; is connected with one terminal of the break in the circuit wire 5, while the remaining end of the armature is designed to engage a contact 15 connected to the other terminal of the break in the circuit wire 5-, the armature being held normally in engagement with the contact 15 through the medium of a spring 16.

17 designates second relay which, in the present instance, is in the form of a combined relay and polarized bell ringer and comprises a pair of electromagnets 18 having the lower ends thereof provided with poles 19 and the upper extremities with poles 20. Disposed centrally of the magnets 18 is an arm 21 having the lower end thereof connected with an armature 22 disposed within the influence of the poles 19 and equipped with a permanent magnet 23 whereby the ends of the armature are permanent magnetic poles. The upper end of the arm 21 is formed to provide a bell tapper 24: disposed between bells 25 and adapted to strike the latter as the arm is rocked under the action of the armature 22 and the magnets 18. Disposed within the influence of the poles 20 of the electromagnets 18 is an armature 26 normally held out of engagement with the poles by means of a spring 27. If desired, a relay similar to that shown in Fig. 7 may be employed and connected in series with the polarized bell ringer. In this event, the ordinary bell ringer is employed and the additional relay polarized and formed of a permanent magnet 28 substantially U-shaped, and coils 29, 29 surrounding the limbs of the core and having the upper ends thereof formed to provide poles 3O controlling an armature 31. Also associated with each telephone set is a third polarized relay 32 comprising a substantially U-shaped permanently magnetized core 33 and coils 34 surrounding the limbs of the core and having the upper ends thereof formed to provide poles 35 controlling an armature 36.

37 designates a set of spring contact fingers comprising fingers 38, 39,. and 41. These fingers are secured together and insulated from one another by means of blocks of insulation 42 interposed between the fingers adjacent to one end thereof. The remaining end of the finger 38 is curved upon itself as at 43, while the adjacent extremity of the finger 39 lies within the'curved portion of the finger 38 and normally engages the same. The free terminals of the fingers 40 and 41 are formed with contact studs 44 and the stud on tie finger 41 is adapted to engage the adjacent part of the finger 40, while the stud on the finger 40 is designed to contact with the adjacent part of the finger 39. The outer ends of these fingers are under the control of a set screw 45 carried by an arm 46 secured to the arm of the receiver hook. When the receiver is removed from the hook, the spring elevates the hook rm and in so doing moves the arm 46 and set screw 45 and in the movement of the set screw 45 the latter engages the adjacent part of the finger 41 with the effect to move the stud on the finger 41 into engagement with the finger 40 and the stud on the last-mentioned finger into engagement with the finger 39. Immediately preceding the receiver hook arm reaching the limit of its movement, succeeding the removal of the receiver, the outer end of the finger 39 is disengaged from the curved end 43 of the finger 38.

47 designates a second set of contact fingers identical in construction to the set of fingers 37 and disposed adjacent to the finger 41 of the set 47 is a rod 48 axially alining with'a-nd connected to one end of the armature shaft of a magneto generator 49,

7 such generator being ofthat type having a longitudinally movable armature shaft equipped with collector rings 50 to take off the alternating current and a commutator 51 to take the direct current from the gen erator. The remaining end of the armature shaft of the generator is connected through suitable gearing with an operating handle 52 whereby the shaft may be rotated togenerate current. Leading from the collector rings 50 are conductors 53 designed to convey the alternating current from the magneto generator, while leading from the commutator 51 are conductors 54 adapted to convey the direct current from the magneto generator. The terminals of the conductors 53 and 54 are connected, respectively, with contact fingers 55, 55 and 56, 56,and the fingers 55 are insulated from each other and from the fingers56, while the fingers 56 are also insulated from each other. The fingers 55 alternate with the fingers 56 and the confronting faces of the companion fingers 55, 56 at the outer ends thereof are formed with contacts 57 and disposed between the contests 57 are blades 58, 58 rigidly secured together and insulated from each "other through the medium ofa block of insulation 59. A spring 60 holds the blades 58, 58 normally in engagement with the contacts 57 on the outer ends of the fingers 55, while an arm 61 is secured to the receiver arm of the particular telephone set and carries a set 3 screw 62 adapted to engage the blades 58, 58 when the receiver is removed from the hook to shift the blades 58, 58 into engagement with the contacts 57 on the outer ends of the contacts 56 as the receiver arm moves upwardly under the action of its spring, thus breaking the connection between the blades 58, 58' and the fingers 55 and establishing a connection between'the fingers 56 and the blades 58, 58. In this operation the alters V nating current conductors 53 are disconnected from the blades 58, 58- and the direct current conductors connected thereto. Leading from the blade 58 is a conductor 63 extending through the coils 34 of the relay 32 and tapped onto the circuit wire 5 adjacent to the contact 15 as at 64, while leading from the binding post 7 is a conductor 65 extending through the coils of the relay 17 and terminally connected to the binding post 8. From the last-mentioned binding post leads a conductor 66 having the termi- Associated with each telephone set is an 1% electric battery 67 and from one side of the battery 67 leads a conductor 68 connected with the armature 26 of the relay 17. Tapped onto the. core of one of the coils 18 of the' relay 17 is a conductor '69 includ- 11'0 ing in multiple the fingers 41, 41 of the sets 37 and 47. Connected in multiple with the fingers 40, 40'of the sets 37 and 47 is a conductor 70 having the terminal thereof connected with the base 29 of the relay 10, while connected in multiple with the fingers 38, 38 of the sets 37, 47 is a conductor 71 having the terminal thereof connected to the armature 13 at the pivot point thereof and lead ing from the pivot point of the armature. 13 is conductor 72 extending through the coils 11 of the relay 10 and connected with the other side of the battery 67. Connected in shunt with the coils of the relay 10 is a buzzer 7,3 or other form of signal. 7

Connected to the conductor 63 between the blade 58 and the relay 32 is a conductor 74 having the free terminal thereof tapped onto the conductor 69 and leading from the conductor 69 is a conductor 75 having the 1 0 terminal thereof connected with the armature 36 of the relay From the core of the relay 32 leads a conductor 76 terminally connected with the base 29 of the relay 10.

In practice, assuming that the subscriber at the set 2 wishes to have talking commu' nication with the subscriber at the set 4;, the subscriber at 2 gives the usual code ring and the subscriber at 1: removes the receiver from the hook to answer the ring. Ringing current flows from the calling subscribers generator, over conductor 53, contacts 55, 5S, conductor 63, relay 32, junction 6i, con tact 15, armature 13, junction 1t, conductor 5, binding post 7 wire 9, line 1, wire 9, at all the stations to binding post 7, wire 65, ringer 17, binding post 8, wire 9, line wire 1, binding post 8, at the calling station, conductor 66, contacts 58, 55, conductor 53, and returns to the generator. As the subscriber at 2 removed the receiver from the hook the arms connected with the receiver hook arm actuated the finger 41 of the set 37 into engagement with the finger 10, the finger 10 into engagement with the finger 39 and the finger 39 out, of engagement with the finger 38, the finger 39 disengaging the finger 38 immediately suc ceeding the movement of the finger 10 into engagement with the finger 39, Simultaneously with this operation ofthe fingers of the set 37, the blades 58, 58 were actuated out of engagement with the contact fingers 55 and into engagement with the contact fingers 56. The subscriber at 2 actuates the handle 5'2 to rotate the armature of the magneto generator and in this operation of the generator direct current passes out of the generator through one of the wires 5-1, the finger 56 connected with such wire, the blade 58, wire 63, the coils 3 1 of the relay 32, contact 15, armature 13 of relay 10, the wire 5, the particular conductor 9, the line wire 1 connected with such conductor, through the conductors 9 of all instruments connected with the line wires, the conductors 65 of such instruments, the coils of the relays 17, back to the other line wire 1 and then back to the other side of the generator by way ofthe remaining conductor 9, a portion of the conductor 65, the conductor 66, blade 58 and conductor 54'. As the relays 17 of the telephone sets are energized one break in the circuit of each local battery 67 is closed, owing to the energized coils of the relays pulling the armatures 26 into engagement with the cores. At the calling subscribers station the relay 32 is also energized, incident to the direct current traversing the windings thereof through the conductor 63 and when the coils of the relay 3:2 are energized the armature 36 is actuated into engagement with the pole faces thereof. After the armature of the generator has been given two or three turns the handle 52 is released and the residual magnetism in the relays 17 of all the telephone sets connected with the line wires holds the armatures 26 in engagement with the pole faces of such relays, thereby maintaining the particular break in each local circuit closed, while the residual magnetism of the relay at the calling subscribers station maintains the armature 36 in circuit closing position. Should any of the remaining subscribers on the line remove his or her receiver from the hook, the local circuit of the battery 67 will be completed incident to the Contact fingers l0 and ll of the set 37 engaging each other and the finger 39 prerious to the finger 39 disengaging the finger 38. When the local circuit is thus completed the coils 11 of the relay 10 are energized and the buzzer 73 sounded, thereby notifying the subscriber that the line is busy. Current flows from one side of the battery 67, through the conductor 68, the armature 26, the cores of the relay 17, the conductor 69, contact fingers ll, 10, 39 and 38 the conductors 71 and 72, the winding of the relay 10 and then back to the other side of the battery 6'7 and as the buzzer 73 is connected in shunt with the relay 10, current also flows through said buzzer to sound the latter. lVhen the coils of the relav 10 are energized, the armature 13 is actuated to disengage the contact 15, thereby breaking the circuit connections between the particular subscribers telephone set and the line wires and when the receiver arm has completed its upward movement the finger 39 is disengaged from the finger 38, thereby breaking the local circuit at this point, but as the finger 41 remains in engagement with the finger 40 the local circuit is closed at this point, current flowing from one side of the battery 67, through the conductor 68, armature 26, the core of the particular coil 18 of the relay 17, conductor 69, contact fingers 11 and 40, a portion of the conductor 70, the base 29 of the relay 10, the cores of the coils 11, armature 13, conductor 72, and the coils 11, back to the battery. Thus, the coils 11 are maintained energized and the armature 13 held in circuit breaking position, while the buzzer 7 3 continues to sound, thereby notifying the particular subscriber that the line is busy and maintaining the telephone set out of communication with the line.

In the calling and called subscribers telephone sets, the receiver arms reach their limits of upward movement previous to the closing of the local circuit at the armature 26, thereby preventing movement of the armature 13 to circuit breaking position and holding the buzzer silent. Should a subscriber attempt to ring in on the line whilethe latter is busy,'the armature shaft of the generator moves longitudinally and in so doing actuates the contact fingers of the set 47 in the manner just described with reference to the set of contact fingers 37, thereby energizing the coils of the relay 10 and sounding the buzzer 73. Thus, the ringing subscriber is advised as to the condition of the line and communication between his telephone set and the line out off.

lVhen the conversation between the subscribers at the sets of instruments 2 and 4 is finished, the subscribers hang up their respective receivers and as the subscriber at 2 restores his receiver to the hook, the contacts 39, l0 and 41 are restored to normal position and in the initial movement of such fingers to normal or original position, the local circuit of the battery 67 is momentarily completed, thereby energizing the relay 10 and sounding the buzzer 73. As the contact fingers reach normal position, however, the local circuit at this point is broken, but owing to the relay 32 being energized, the local circuit is maintained closed at the armature 36, current flowing from one side of the battery 67, through the conductor 69, armature 36 and cores of relay 32, conductor 76, base 29, the cores of the relay 10, armature 13, conductor 72, through the windings of the relay l0, and back to the other side of the battery. Thus, the buzzer 73 continues to sound and so notifies the subscriber that the connection between his telephone set and the line is broken and the relays 17 of the other telephone sets on the line energized. To denergize all the relays 17 on the line and the relay 32 of the particular subscriber, the armature of the magneto generator is revolved, thereby sending an alternating current over theline through the relay 32 of the particular subscriber and all of the relays .17, thus dissipating the residual magnetism of such relays and releasing the armatures. In this operation of the genera-tor, the alternating current flows from one side of the generator, through one of the conductors 53, the particular contact finger 55, the blade 58 in engagement with such finger, conductor 63, the relay 32 of the'particular subscriber, through. the circuit wires of the telephone set out on the line by way of one of the line wires 1, through all of the relays 17 on the line by way of the particular conductor 9, conductor 65, back onto the line by way of the remaining conductor 9,'

through the remaining line wire 1, the relay 17 of the particular subscriber, by way of the remaining conductor 9, the conductor 65, and then back to the other side of the generator by way of the conductor 66, blade 58 and the remaining conductor 53.

The line wires I extend into a central station and connected in multiple with the line wires 1 in the exchange station is a jack 77 and a relay 78 controlling a local circuit 79 includingva suitable source of electrical energy as a battery 80 and a visible signal 81. Connected in circuit with the jack 77 is a drop 82 having one side grounded as at 83, while connected with the conductor 63 is a push button switch 84 adapted, when actuated, to break the continuity of the conductor 63 and connect one side of the magneto generator with the ground by way of a conductor 85. By means of this construction, it will be seen that as long as the line is busy the signal 81 will be energized, thereby notifying the operator in charge of the central station of the condition of the telephone system, while by depressing-the button 84 and controlling the armature of the generator a subscriber may energize the drop 82 and so obtain communication with the central operator. 7

While I have herein shown and described one preferred form of my invention by way of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention.

I claim:

1. In a' lock out system for party line telephones, the combination with the line wires and sets'of telephone instruments, of

an electroresponsive device for breaking the connection between each set of'instruments and the line wires, a'local circuit including said device, a second electroresponsive device associated with each set of instruments and controllinga break in said local circuit, means associated with each set of instruments and operable to energize all of said second-named electroresponsive devices,

of each set of instruments succeeding the establishment of talking communication between two sets to close a second break in said local circuit whereby said first-named electroresponsive devices will be energized to disconnect the particular set of instruments from the line.

2. In a lock out system for party line telephones, the combination with the line wires and sets of telephone instruments, of means for breaking the connection between each set of instruments and the line wires, a

.10-5 1 and means operable from the receiver'hook local circuit including said means, means 7 operable from another set of instruments for closing. said local circuit, and a signal in said local circuit in shunt with said means and operable upon the closing of the local circuit to advise the subscriber of the condition of said first means.

3. In a lock out system for party line telephones, the combination with the line wires and sets of telephone instruments, of means for breaking the connection between each set of instruments and the hue wires, a local cuit whereby said first means may be restored to normal position.

In testimony whereof I aflix my signature in presence of two Witnesses.

JOSEPH WILLIAM BOl/VLEY. Witnesses:

VVILLIAM HERBERT SMAIL, HARRY WILLSMER.

circuit including said means, means operable from another set of instruments for closing said local circuit, a signal in said local circuit in shunt With said means and operable upon the closing of the local circuit to advise the subscriber of the condition of said first means, and means operable from another telephone set to break said local cir- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

Images