US1103288A - Selective signaling system. - Google Patents

Selective signaling system. Download PDF

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Publication number
US1103288A
US1103288A US68524412A US1912685244A US1103288A US 1103288 A US1103288 A US 1103288A US 68524412 A US68524412 A US 68524412A US 1912685244 A US1912685244 A US 1912685244A US 1103288 A US1103288 A US 1103288A
Authority
US
United States
Prior art keywords
conductor
transmitter
station
signaling system
line
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
US68524412A
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English (en)
Inventor
Ralph N Hill
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.)
AT&T Corp
Original Assignee
Western Electric Co 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
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US68524412A priority Critical patent/US1103288A/en
Priority to GB191302612D priority patent/GB191302612A/en
Priority to DE1913272799D priority patent/DE272799C/de
Application granted granted Critical
Publication of US1103288A publication Critical patent/US1103288A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/18—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre
    • H04Q5/22—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre the subordinate centre not permitting interconnection of subscribers connected thereto

Definitions

  • Thisiinvention relates to an answer'back for signaling systems. and more particularly to an answer-back for party line signaling systems wherein the different stations are selectively signaled.
  • the object of the invention is to provide an answer-back system which shall be simple, inexpensive and reliable in operation.
  • a telephone set comprising a telep lone transmitter in circuit with a local battery'and the primary of an induction coil the secondcry of which is adapted for connection with the line wires.
  • 'Ihe answer-back signal is obtained by causing rapid changes in the resistance of theloca] circuit including the transn'iitter which will in turn induce a tone on the line to be heard atthecall initiating station.
  • Thespecific means provided for obtaining this signal consists of an electromagnctically operated vibrator mechanically associated with the telephone transmitter, and having a circuit including the local battery of the transmitter which is closed in the operation of the semaphore or other visual signal.
  • the drawing is a circuit showing the wiring of apparatus in a semaphore signaling system embodying this invention.
  • a despatchers or calling station designates a despatchers or calling station and 0, 7 and 8 way stations all connected with line wires 10 and 11.
  • a central battery 12 Located at the (lespatchers or calling station 5 is a central battery 12 adapted to be alternately connected and disconnected with the line wires 10 and 11 through contacts 13 and 14 on an impulse relay 15.
  • The'impulse relay 15 is in circuit with a local battery 16 and interrupting or transmitting key 17.
  • a telephone set comprising a receiver '18 bridged across the line wires in series with a condenser 19 and the secondary. of an induction' coil '20, and a transmitter 21 in' a local circuit with a battery 22 and the vast of the induction coil 20.
  • T o apparatus and circuits at each of the way stations 6, 7 and 8 are the same and as shown at station 6 and are as follows: Bridged. across the line wires 10 and 11 is a selector mechanism comprising electromagnets 25 and 26 controllin the operation of a bridge an electromagnet 30 across the line wires 10 and 11. The electroma net 30 when energized withdraws a dog 31. tom engagement with a; vertically movable rod 32'connected with a semaphore arm 33 permitting ger position.
  • a clock train interrupting mechanism 39 which may be an ordinary district messenger-call box' and which when operated rotates a shaft carrying contact wheels 35 and 36 to close circuits through contact springs 37'and 88 as will hereinafter appear.
  • a telephone set comprising a receiver 45, a transmitter 46, induction coil 47, local battery 48, receiver switch hook 49 and condenser 50.
  • the transmitter 46 is in a local circuitclosed through a contact 51 of the receiver switch lid- 1:49 and including the local battery .48 and primary of the induction coil 47 inseries therewith.
  • the receiver circuit will be from line wire 10' over conductor 52, conductor 53, the receiver 45, secondary of induction coil 47, contacts 51 and 54 of the receiver switch hook, conductor 55, conductorfi, condenser and conductor 57 to the otherlinc when.
  • the means through which the answerback signal is obtained are as follows: Mounted upon the back of the transmitter 46 is an electromagnetic vibrator 60 having an operating circuit including the local battery 48 and a normally closed contact 61 on'the receiver switch hook. The operation of the vibrator 60 agitates the granular carbon or other comminuted material in the transmit'- ter which causes a tone to be sent over the line through the same path as' the outgoin .voice currents which Wlll be heard in the r DCver at the despatchers station.
  • ⁇ Vhen Contact is closed between wheel 35 and contactspring 37 an operating circuit is completed for the vibrator which may be traced as follows: from one side otbattery 48, conductor 65, conductor 66, windingpf vibrator 60, conductor 69, contact 61, conductor 70, conductor 71, contact spring 37, wheel 35,,shaft 40, a contact sprin 72 hearing thereon and conductor 73 to t e other side of battery 48.
  • lar carbon of the transmitter button caused by the operation of the vibrator and induces a current on the line through the secfor this current will be as follows: from one side of the secondary of induction coil 47 through the winding of the receiver t5, con ductor 53, conductor 52, line conductor 10, receiver 18 at dcs'patchers stationfi, line conduetor ll, conductor 57, condenser 50, conductor 56, contact spring 38, interrupter wheel 36, shaft 40, wheel 35, contactspri'ng 37, conductor 71 to the other side of the secondary of the induction coil 47.
  • the make and break of the Whe'el'fifland spring 38 in terrupts the tone/and thus produces a code answer-back.
  • a signaling system the combination with a pair of line wires, of a signal-transmitting station connected therewith, a sigmil-receiving station connected with said line wires, a telephone transmitter at said signal-receiving station adapted to be opera iiveiy associated with said line wires, vibrating means mechanically connected wit-li'said transmitter, and means at said transmitting station for receiving a signal resulting from the operation of said vibrating means.
  • the path local battery adapted to be operativcly as oelatedv with said-line wn'rs, an elven-munglicth: vibrator having a resonant mnru-ction with said transmitter, a cirrnitt'or said electroniagnelic vibrator including said local battery, circuit-closing nit-ans lhereforx'ontrolled by said selector. and rnal -receiring ,n'ieans at said transmitting station in circuit to receive a signal resulting from the operation of said i-lcctroinagnotie vibrator.
  • ing station adapted to be op'eiafiiicly-mssm elated with said line wires, an electromagnetic vibrator mechanically connected with I said transmitter, and signabreceiving means

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
US68524412A 1912-03-21 1912-03-21 Selective signaling system. Expired - Lifetime US1103288A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US68524412A US1103288A (en) 1912-03-21 1912-03-21 Selective signaling system.
GB191302612D GB191302612A (en) 1912-03-21 1913-01-31 Selective Signalling System.
DE1913272799D DE272799C (de) 1912-03-21 1913-03-21 Einrichtung füer gesellschaftsleitungen mit wahlweisem anruf der stationen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68524412A US1103288A (en) 1912-03-21 1912-03-21 Selective signaling system.

Publications (1)

Publication Number Publication Date
US1103288A true US1103288A (en) 1914-07-14

Family

ID=3171483

Family Applications (1)

Application Number Title Priority Date Filing Date
US68524412A Expired - Lifetime US1103288A (en) 1912-03-21 1912-03-21 Selective signaling system.

Country Status (3)

Country Link
US (1) US1103288A (de)
DE (1) DE272799C (de)
GB (1) GB191302612A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481840A (en) * 1945-06-28 1949-09-13 Automatic Elect Lab Timer for switching from signaling device to the subscriber's ringer after selectable predetermined time

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481840A (en) * 1945-06-28 1949-09-13 Automatic Elect Lab Timer for switching from signaling device to the subscriber's ringer after selectable predetermined time

Also Published As

Publication number Publication date
DE272799C (de) 1914-04-09
GB191302612A (en) 1913-10-02

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