US572221A - Charles e - Google Patents

Charles e Download PDF

Info

Publication number
US572221A
US572221A US572221DA US572221A US 572221 A US572221 A US 572221A US 572221D A US572221D A US 572221DA US 572221 A US572221 A US 572221A
Authority
US
United States
Prior art keywords
line
annunciator
circuit
telephone
signaling
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
Publication date
Application granted granted Critical
Publication of US572221A publication Critical patent/US572221A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching

Definitions

  • My invention relates to switchboards of telephone-exchange systems, particularly to that system in which the act of calling auto- I 5 matically brings the signaling substation into connect-ion with the operators telephone to permit of communication between the operator and subscriber.
  • the primary object of my present improvement is to prevent the connection of 5 more than one line with the operators tele phone at a time.
  • I have so organized the apparatus and circuits that after one annunciator has operated and connected the corresponding line with the telephone of 0 the attendant the operation of the remaining annunciators of the group is rendered impossible until the first call shall have been attended to and the annunciator restored to its normal position.
  • the call-signals are 5 transmitted from the substations to the exchange by means of a source of signalingcurrent located at the exchange and connected with each line through its particular annunciator, the line being normally open as to continuous currents at the substation. At the latter station a switch is provided for closing this circuit when I desired.
  • each annnnciator is provided with a. pair of switch-contacts in addition to the ordinary contacts by which the telephone is connected with the line, which control the continuity of the circuit of the common signaling-battery, the switch-contacts of all the annunciators of the group being included in series in the battery-circuit.
  • Subordinate features of my invention Consist in means for restoring the annunciator of a signaling-line upon the establishment of connection with the line by means of the usual connecting-plugs and in a device for controlling the connection of the operators telephonewith any line during the use of the line.
  • the first of these subordinate objects I accomplish by employing the type of annunciatorknown asa self-restoring or self-- resetting annunciator,tl1e restoring-magnet being included in a local circuit which is closed by cooperating contact-pieces at any spring-jack with which connection may be made by means of a plug, one of the contactpieces being preferably located in the springjack itself and the otherin the connectingplug, the circuit-connections with the latter being made by means of the usual flexible cord.
  • the second-mentioned subordinate feature consists in a manually-controlled key for opening the local Circuit to permit the operation of the annunciator in order to connect the operators telephone with the line.
  • Ob- 5 viously if the restoring circuit be thus interrupted while the line-circuit is still complete at the substation the annunciator will at once respond to the current flowing from the common signaling-battery in the line-circuit mo and will act to connect the line with the tele phone, as in the case of an individual signal.
  • a 7 line-wire 1 is connected with the line-spring position.
  • a by conductor 5 with 'contactd of annunciator conductor 5 normally, extending from conconnected with their respective lines while p anyin g drawings and may be described with ing terminals of all the line-annunciators are all of the line-annunciators being included quired for signaling and for bringing the op My invention is illustrated in the accomreferenee thereto.
  • Figure 1 represents, diagrammatically, the apparatus and circuits of my improved exchange system.
  • Fig. 2 is an elevation of the line-annunciator, showingthespeeial switchcontacts with which it is provided in my in-- vention.
  • FIG. 1 In the diagram of Fig. 1 three substations A, A, and A are represented as connected with a telephone-switchboard by means of line-wires 1, 2, and 3,1espective1y. As the circuit connections of all the lines arealike those of line to substation A alone may be traced.
  • the substation is provided with the usual telephone a, microphone to, and bell a together with an automatic switch a for switching the bell and telephone alternately into circuit of theline.
  • a condenser a is The I) of a spring-jack c at the'exchange and with one terminal of the main or operating magnet d of the line-annunciator e.
  • Each annunciator is provided with another pair of, contact-points d d, which are adapted to be closedtogether when the shutter d of the annuneiator is operated.
  • the contacts (Z upon the different annunciators are pieces (Z- are united with a common conductor 7, which constitutes one terminal of the operators telephone set g.
  • Each spring-jack has, in. addition to the, line-spring b, a thimble b, which constitutes one terminal of the restoring-magnet d of the corresponding line -annuneiator, the other terminal of the magnet being connected to earth.
  • the operator is provided,.as usual, with anumber of pairs of connecting-plugs for .uniting two lines into continuous circuit.
  • anumber of pairs of connecting-plugs for .uniting two lines into continuous circuit.
  • butone pair is represented, togetherwith the various accessory appliances reerators telephone into connection with the line.
  • Each plug, as h, is provided with a contact-piece 2', adapted to make connection with the line-spring b and with a sleeve contact-piece 1', arranged to register with thimble b of the spring-jack, into which it may be inserted.
  • the tips 1 of the plugs h h of a pair are connected together by a flexible conductor 8, twov calling-keys k and It being included in the circuit, each being adapted to send a signaling-current from the generatorl through the corresponding plug when the key is depressed.
  • the sleeve contact-pieces 2" are connected together by a conductor 9, a branch 10 from which extends to the free terminal of battery f.
  • a key on is included in conductor 9, adapted to open the circuit when depressed.
  • a clearing-out signal 0 of ordinary character is connected in a branch from conductor 10 to conductor 8 of the plug-circuit.
  • Magnets 61 and d may be ofthe tubular type, with their closed extremities placed together.
  • the shell of magnet 01 carries a bracket (1", provided with trunnions, upon which an armature (Z is pivoted, being hung from its upper edge.
  • the shell of magnet d likewise carries a bracket d, in which a shutter (Z is pivoted at its lower edge. Before the shutter hangs a light shield d,.whieh is thrown into a horizontal position by the shutter when the latter falls forward.
  • the shutter is normally engaged and held in its vertieal position by a catch at the extremity of an arm (Z carried by armature (Z
  • the two contact-points d d are carried in a plate of insulating material secured to the bracket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Structure Of Telephone Exchanges (AREA)

Description

(No Model.)
0. E. SGRIBNER. TELEPHONE EXCHANGE SYSTEM.
No. 572,221. Patented'Dec. 1, 1896.
' like:
A6. fla 2422.
m: uomus mans co, PNOTO-LIYHCL. wasH NOYON, u. c.
UNIT D STATES PATENT OFFICE.
. CHARLES E. SCRIBNER, or CIIIC'Aeo, ILLINOIS, ASSIGNOR TO THE WESTERN ELECTRIC COMPANY, or SAME PLACE.
TELEPHONE-EXCHANGE SYSTEM.
SPECIFICATION forming part of Letters Patent No. 572,221, dated December 1,1896. Application filed October 16, 1894. Serial No. 626,062. (No modeli) To all whom it 1-way concern.-
Be it known that I, CHARLES E. SCRIBNER, a citizen of the United States, residing at Ohicago,'in the county of Cook and State of Illi- 5 nois, have invented a certain new and useful Improvement in Telephone-Exchange Systems, (Case No. 362,) of which the following is a full, clear, concise, and exact description, reference being had to the accompany- IO ing drawings, forming a part of this specification.
My invention relates to switchboards of telephone-exchange systems, particularly to that system in which the act of calling auto- I 5 matically brings the signaling substation into connect-ion with the operators telephone to permit of communication between the operator and subscriber.
I-Ieretofore it has been common to provide a signaling-annunciator in connection with each telephone line, the annunciator being provided with switch contacts adapted to connect the line-circuit with the telephone of a listening operator when the annunciator was actuated in response to a signaling-current transmitted in the line. The disadvantage of this system has been that in the event of several subscribers signaling simultaneously the different telephone -lines became 0 connected with the operators telephone at the same time and confusion of the orders to the operator resulted.
The primary object of my present improvement is to prevent the connection of 5 more than one line with the operators tele phone at a time. To this end I have so organized the apparatus and circuits that after one annunciator has operated and connected the corresponding line with the telephone of 0 the attendant the operation of the remaining annunciators of the group is rendered impossible until the first call shall have been attended to and the annunciator restored to its normal position. The call-signals are 5 transmitted from the substations to the exchange by means of a source of signalingcurrent located at the exchange and connected with each line through its particular annunciator, the line being normally open as to continuous currents at the substation. At the latter station a switch is provided for closing this circuit when I desired. Hence when the switch of any substation is operated the corresponding line-annnnciator upon the switchboard at the exchange is actuated and connects the line with the operators telephone. Each annnnciator is provided with a. pair of switch-contacts in addition to the ordinary contacts by which the telephone is connected with the line, which control the continuity of the circuit of the common signaling-battery, the switch-contacts of all the annunciators of the group being included in series in the battery-circuit. It is thus plain that when an annunciator has been operated the transmission of a signal from any other substation of a group is prevented since the connection of the other members of the group with a common signaling-battery is interrupted. '70
Subordinate features of my invention Consist in means for restoring the annunciator of a signaling-line upon the establishment of connection with the line by means of the usual connecting-plugs and in a device for controlling the connection of the operators telephonewith any line during the use of the line. The first of these subordinate objects I accomplish by employing the type of annunciatorknown asa self-restoring or self-- resetting annunciator,tl1e restoring-magnet being included in a local circuit which is closed by cooperating contact-pieces at any spring-jack with which connection may be made by means of a plug, one of the contactpieces being preferably located in the springjack itself and the otherin the connectingplug, the circuit-connections with the latter being made by means of the usual flexible cord.
The second-mentioned subordinate feature consists in a manually-controlled key for opening the local Circuit to permit the operation of the annunciator in order to connect the operators telephone with the line. Ob- 5 viously if the restoring circuit be thus interrupted while the line-circuit is still complete at the substation the annunciator will at once respond to the current flowing from the common signaling-battery in the line-circuit mo and will act to connect the line with the tele phone, as in the case of an individual signal.
. included in the branchwith bell a 7 line-wire 1 is connected with the line-spring position. a by conductor 5 with 'contactd of annunciator conductor 5, normally, extending from conconnected with their respective lines while p anyin g drawings and may be described with ing terminals of all the line-annunciators are all of the line-annunciators being included quired for signaling and for bringing the op My invention is illustrated in the accomreferenee thereto.
Figure 1 represents, diagrammatically, the apparatus and circuits of my improved exchange system. Fig. 2 is an elevation of the line-annunciator, showingthespeeial switchcontacts with which it is provided in my in-- vention.
In the diagram of Fig. 1 three substations A, A, and A are represented as connected with a telephone-switchboard by means of line-wires 1, 2, and 3,1espective1y. As the circuit connections of all the lines arealike those of line to substation A alone may be traced. The substation is provided with the usual telephone a, microphone to, and bell a together with an automatic switch a for switching the bell and telephone alternately into circuit of theline. A condenser a is The I) of a spring-jack c at the'exchange and with one terminal of the main or operating magnet d of the line-annunciator e. The remainconnected with a common conductor 4:, which .terminates in the contact-anvil d of-annunciator e. This anvil is one of two which are crossed together by contact-piece d on the .annuneiator while the latter is in its normal Contact (l of the pair is connected 6, contact (1 of the latter being connected in turn with contact (Z of annunciator 6 whose contact d is grounded through the common signaling-battery Z. Contacts d 01 upon the different annunciators are thus in series in a ductor 4 through signaling battery f to earth,
in branches from thecommon grounded battery to their respective lines.
Each annunciator is provided with another pair of, contact-points d d, which are adapted to be closedtogether when the shutter d of the annuneiator is operated. The contacts (Z upon the different annunciators are pieces (Z- are united with a common conductor 7, which constitutes one terminal of the operators telephone set g.
Each spring-jack has, in. addition to the, line-spring b, a thimble b, which constitutes one terminal of the restoring-magnet d of the corresponding line -annuneiator, the other terminal of the magnet being connected to earth.
The operator is provided,.as usual, with anumber of pairs of connecting-plugs for .uniting two lines into continuous circuit. In the diagram butone pair is represented, togetherwith the various accessory appliances reerators telephone into connection with the line. Each plug, as h, is provided with a contact-piece 2', adapted to make connection with the line-spring b and with a sleeve contact-piece 1', arranged to register with thimble b of the spring-jack, into which it may be inserted. The tips 1 of the plugs h h of a pair are connected together by a flexible conductor 8, twov calling-keys k and It being included in the circuit, each being adapted to send a signaling-current from the generatorl through the corresponding plug when the key is depressed. The sleeve contact-pieces 2" are connected together by a conductor 9, a branch 10 from which extends to the free terminal of battery f. A key on is included in conductor 9, adapted to open the circuit when depressed. A clearing-out signal 0 of ordinary character is connected in a branch from conductor 10 to conductor 8 of the plug-circuit.
The general construction of'annunciator e is represented with sufficient clearness in the diagram, but Iwilldescribe it in somedetail with reference to Fig. 2.
Magnets 61 and d may be ofthe tubular type, with their closed extremities placed together. The shell of magnet 01 carries a bracket (1", provided with trunnions, upon which an armature (Z is pivoted, being hung from its upper edge. The shell of magnet d likewise carries a bracket d, in which a shutter (Z is pivoted at its lower edge. Before the shutter hangs a light shield d,.whieh is thrown into a horizontal position by the shutter when the latter falls forward. The shutter is normally engaged and held in its vertieal position by a catch at the extremity of an arm (Z carried by armature (Z The two contact-points d d are carried in a plate of insulating material secured to the bracket. They arecrossed together while the shutter is in-its normal position by a light strip of metal d, fastened to the shutter and adapted to bear against them. The contact-points d d arearranged on the lower part of the bracket (Z in the manner of the ordinary night-bell springs, the spring (1 being in position to been gaged by the shutter in its fall outward and to be closed upon by d. hen the magnet (Z is excited, it attracts its armature d and thus releases the shutter (1 The latter falls outward, throwing the shield (1 into its horizontal position and at the same time removing the cross between anvils d d and closing contacts (Z (1 together.
I will now trace the operation of the system throughout-with reference to Fig. 1. In the normal condition of the apparatus the circuit contact-points d d and conductor '7 to the at the substation. The annunciator is thus operated and displays its signal, at the same time closing a circuit from the line through operators telephone set 9. The subscriber then, addressing the listening operator at the exchange, communicates the order for the connection which he desires. The operator inserts plug h into the spring-jack c of the calling-line and places the remaining member 71, of the pair of plugs in a spring-jack of the line called for. Circuit is thus completed between the two lines, being by way of the tips of the plugs and conductor 8 of the plug circuit. I
By the insertion of plug h into spring-jack c the local restoring-circuit of the annunciator e was closed through a circuit from grounded battery f through conductor 10, conductor 9 of the plug-circuit, key m, sleeve "L7 of plug h, thimble b of the spring-jack,
and thence to earth through the restoringmagnet d of the annunciator. This instrument is thus returned to its normal position, the signal is efiaced, the contacts d d are permitted to separate and thus to disconnect the operators telephone set 9 from the line 2,
' and the contacts (Z d are again closed together, completing the circuit of the signaling-batteryf to conductor 4 and thus making possible the transmission of a signal from another substation. By the'insertion of plug h in the spring-jack of the line called for the restoring-circuit of that line also is closed, so that its shutter is prevented from falling when the answering subscriber removes his telephone from its switch-hook to enter into conversation.
If at anytime the operator should desire to connect her telephone to line 2, she may depress the key m. The restoring-circuit of annunciator e is thereby interrupted, and since current is still flowing through the magnet cl of the annunciator of that line, the telephone at the substation being removed from the switch-hook, the shutter of the annunciator is released and connects the line with the telephone 9.
While the telephones are in use there exists current from battery f through clearingout annunciator 0 to conductor 8 and thence to earth at the substations. iVhen, after the completion of conversation, the subscribers replace their telephones on their switchhooks, current through the clearing-out signal is interrupted and it gives the signal for disconnection.
Having thus described my invention, I claim as new and desire to secure by Letters Patent-'- 1. In combination with the telephone-lines of a group, each provided with means for making connection with it in a switchboard, a relay in each line normally responsive to currents in the line, a local circuit containing an operators telephone adapted for connec* tion with any of the lines through the agency of the corresponding relay, a device actuated in the movement of any relay adapted to prevent the operation of any other relay, at the same time, and mechanism actuated in making connection with the line adapted to restore the said device to its normal-position to permit the subsequent operation of other relays, substantially as described.
2. The combination with telephone-lines of a group, of a relay in'connection with each line responsive to currents in the line, a local circuit including an operators telephone adapted for connection with any line through the agency of the corresponding relay, a circuit controlled by each of the relays to all the other relays adapted when changed by one relay to prevent the operation of the other, electrical mechanism in each relay adapted to return the relay to its normal position, a circuit including said mechanism, and a switch operated in making connection with the line controlling the said last-mentioned circuit, substantially as described.
3. The combination with each of several telephone-lines, of a common source of signaling-current adapted to be closed through any of the lines to signal from the substation to the exchange, an annunciator in the line, and switch-contacts thereon controlling the connection. of the source of signaling-current with all the lines, an electrical device for restoring the relay to its normal position, and a switch actuated in making connection with the line controlling the circuit through said device, substantially as described.
4:. The combination with each of several telephone-lines normally open at the substation and including a common source of signalin g-current at the exchange, of means for closing the line at the substation for signaling, and an annunciator in each line having switchcontacts adapted to disconnect the source of signaling-current from all the lines when the annunciator is operated, substantially as described.
5. The combination with each of several telephone-lines normally open at the substations and connected with a common source of signalingcurrent at a central station, of means at each substation for closing the linecircuit to signal, an annunciator in each line at the central station having one pair of switch-contacts adapted, when the annunciator is operated, to connect its particular line with an operators telephone and another pair of switch contacts adapted to disconnect the common source of signaling-current from all the lines of the group, substantially as described.
6. The combination with a telephone-line, of a self-restoring annunciator in the line together with a source of electric current, switch-contacts controlled by the annunciator adapted to connect the line with an operators telephonewhen it is operated, a local circuit through the restoring-magnet, switch-coritaets for closing the same when connection is made 1131113116 line, and a key adapted to open the local circuit, whereby the operators telephone may be brought into connection with the line during theme of the line, substantially as described.
In Witness whereof I hereunto subscribe my name this 3d day of September, A. D1894.
CHARLES E. SORIBNER- Vitnesses:
ELLA EDLER,
LUCILE RUssELL.
US572221D Charles e Expired - Lifetime US572221A (en)

Publications (1)

Publication Number Publication Date
US572221A true US572221A (en) 1896-12-01

Family

ID=2640919

Family Applications (1)

Application Number Title Priority Date Filing Date
US572221D Expired - Lifetime US572221A (en) Charles e

Country Status (1)

Country Link
US (1) US572221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050261996A1 (en) * 2003-04-14 2005-11-24 First Data Corporation Auction systems and methods for selecting inserts for direct mailings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050261996A1 (en) * 2003-04-14 2005-11-24 First Data Corporation Auction systems and methods for selecting inserts for direct mailings

Similar Documents

Publication Publication Date Title
US572221A (en) Charles e
US488036A (en) Charles e
US557898A (en) scribnee
US652977A (en) Signaling apparatus for telephone-switchboards.
US357540A (en) Local battery-circuit for multiple-switch-board systems
US552726A (en) sceibner
US656997A (en) Signal for telephone trunk-lines.
US427742A (en) Telephone-exchange apparatus
US758116A (en) Supervisory signal apparatus for telephone-switchboards.
US543901A (en) Charles e
US667463A (en) Signaling apparatus for telephone-switchboards.
US552724A (en) Charles e
US513537A (en) Charles e
US592339A (en) Milo g-
US592310A (en) Milo g
US592326A (en) Milo g
US759771A (en) Signal apparatus for telephone-switchboards.
US590137A (en) Of same place
US667448A (en) Signal for trunk-lines.
US592313A (en) Milo g
US592420A (en) kellogg
US745579A (en) Telephone-exchange system.
US574280A (en) Automatic signaling device for telephone-exchanges
US763803A (en) Signaling system for telephone-exchanges.
US592361A (en) Milo g