US1347849A - Signaling-circuit - Google Patents

Signaling-circuit Download PDF

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Publication number
US1347849A
US1347849A US305755A US30575519A US1347849A US 1347849 A US1347849 A US 1347849A US 305755 A US305755 A US 305755A US 30575519 A US30575519 A US 30575519A US 1347849 A US1347849 A US 1347849A
Authority
US
United States
Prior art keywords
circuit
transmitter
line
receiver
substation
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
US305755A
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English (en)
Inventor
Paul J Hackett
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.)
UNIVERSAL HIGHPOWER TELEPHONE
UNIVERSAL HIGHPOWER TELEPHONE CO
Original Assignee
UNIVERSAL HIGHPOWER TELEPHONE
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 UNIVERSAL HIGHPOWER TELEPHONE filed Critical UNIVERSAL HIGHPOWER TELEPHONE
Priority to US305755A priority Critical patent/US1347849A/en
Priority to GB1566020A priority patent/GB170048A/en
Priority to FR519084A priority patent/FR519084A/fr
Application granted granted Critical
Publication of US1347849A publication Critical patent/US1347849A/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
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Definitions

  • WiTNES ES l/VVE/VTOR w BY ,4 TTOR/VEV UNITED STATES. PATENT OFFICE.
  • This invention relates to the circuit arrangement of a telephone substation, and more particularly to telephone substations in combination with a telephone line over which two-way communication is to be established.
  • the object of this invention is to provide a circuit arrangement of the substation apparatus in a single line circuit two-way communication system such that each substa tion will be free from side tone, and, will also give a maximum ratio of received to transmitted energy consistent with the requirements necessary to secure freedom fromside tone.
  • the substation of my invention is provided with a transmitter, a receiver, an auxiliary resistance and necessary transformers to so connect and relate the component elements to each other and to the line that the above mentioned requirements are fulfilled.
  • FIG. 1 is a diagram ofthe fundamental arrangement of the substation apparatus, the remaining drawings illustrating modifications of Fig. 1.
  • Figs. 2 and 3 are diagrams showing the direction of ourrent'fiow in the substation of F ig.- 1 while transmitting and receiving respectively.
  • Fig. 4 shows the substation of my invention adapted for the use of a differential transmitter.
  • Figs. 5 and 6 show the substation of my invention adapted. for use in common battery systems using a differential transmitter. The use of a differential transmitter in common battery systems makes necessary'the impedance coils ZZ' and Z.
  • Fig. 7 is a diagram illustrating a modification of the substation of Fig.
  • Figs. 8 and 9 are-diagrams illustrating the flow of current inthe-substation of Fig. 7 while transmitting and receiving respectively.
  • L is a line connected to a substation comprising a' transmitter T, a receiver R, an auxiliary resistanceX, and two induction coils having twowindings each N N and N N respectively.
  • the receiver. R, and auxiliary resistancefX, are the same as the receiver. R, and auxiliary resistancefX.
  • Fig. 2 The operation of the substation during transmission is shown in Fig. 2. Upon speaking into the transmittertheaction isequivalent to generating an alternating voltage in the transmitter. Considering, then, that the transmitter is a source of alternat- Patented Jury 27, 1920'.
  • auxiliary resistance must: be conjugate t0 the line While receiving. Referring to Fig. 3, the following relations must be true in vorder for no currentto'flow 1n the auxiliary resistance while receiving:
  • Fig. 7 is a modification ofthe substation of my inventionadapted for use on common battery. systems.
  • Fig. 8 The operation during transmission is shown in Fig. 8 and is as follows; the action of the transmitter supplies alternating current to the line L, and auxiliary resistance X, in series, the instantaneous direction of current fiow being indicated by the arrows.
  • ⁇ Vindings i and N are in bridge of the line and auxiliary resistance respectively, and they induce voltages inwindings N and N respectively.
  • the substation being properly designed andv so connected that the voltages-induced in windings N and N will be'equal and opposite, andno current Will flow in the receiver circuit.
  • a two way signaling system the combination of two transformers each having a plurality of windings, and four coniponent elements consisting, respectively, of a circuit for the transmission and reception of signals, a receiving circuit proper, a balancing circuit proper, and a transmitting circuit, three of said component elements forming a serial circuit, one winding each of said transformers bridging separately two of said component elements in said serial circuit, the remaining fourth component elementforming another serial circuit with windings of said transformers, said serial circuit being inductively related to first named serial circuit, said elements being so proportioned and related that the impedance of the combination comprising said first named circuit, said receiving circuit proper, said balancing circuit and said transformers, as seen from said transmitting circuit proper, is equal to the impedance of said transmitting circuit proper.
  • a telephone apparatus comprising a line, a transmitter, a receiver and an auxiliary resistance, three of said elements forming aserial circuit, two induction coils having two windings each, one winding each of said induction coils bridging separately two of said elements in said serial circuit, the
  • a telephone apparatus comprising a l1ne, a transmitter, a receiver and a-n auml iaryresistance, threeof said elements forming a serial circuit, two induction coils havthe connections such, that substantially none of the energy supplied by the transmitter shall be absorbed by the receiver.
  • a telephone apparatus comprising a ,line, a transmitter, a receiver and SIMixiliary resistance, three of said elements formingia serial circuit, two induction coils having two windings each, one winding'each of said induction coils bridging separately two of said elements in said serial circuit, the fourthelement and the remaining two windings ofsaid induction coils forminga separate serial circuit, said circuit being inductively associated with the first mentioned circuit, the parts being so proportioned, and the connections such, that the transmitter supplies maximum effective energy.
  • a telephone apparatus comprising'a line, a transmitter, a receiver and an auxiliary resistance, three of said elements forming a serial circuit, two induction coils having two windings each, one winding eachof said induction coils bridging separately two of said elements insaid serial circuit, the fourth element and the remaining two windings of said induction coils forming a separate serial circuit, said circuit being inductively associated with thefirst mentioned circuit, the parts being so proportioned, and the connections such, that maximum energy is absorbed by the receiver from the line when receiving.
  • a telephone apparatus comprising a line, a transmitter, a" receiver and an auxiliary resistance, three of said elementsv forming a serial circuit, two induction coils having two windings each, one winding each of said induction coils bridging separately two of said elements in said serial circuit, the fourth element and the remaining two windings of said inductioncoils forming a sepasaid induction coils bridging separately two of said elements in said serial circuit, the fourth element and the remaining two Windings cf said induction coils forming a separate serial circuit, said circuit being inductively associated with the first mentioned circuit, the parts being soproportioned, and the connections such, that the transmitter supplies maximum energy to the line Without absorption of energy, by the receiver when the apparatus is transmitting, and maximum energy is absorbed by the receiver from the line WhGl'l'thG apparatus is receiv ing, Without absorption of energy by said resistance.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
US305755A 1919-06-21 1919-06-21 Signaling-circuit Expired - Lifetime US1347849A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US305755A US1347849A (en) 1919-06-21 1919-06-21 Signaling-circuit
GB1566020A GB170048A (en) 1919-06-21 1920-06-09 Improvements in signalling circuits, particularly applicable to telephony
FR519084A FR519084A (fr) 1919-06-21 1920-07-06 Perfectionnements apportés aux appareils pour circuits d'appel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US305755A US1347849A (en) 1919-06-21 1919-06-21 Signaling-circuit

Publications (1)

Publication Number Publication Date
US1347849A true US1347849A (en) 1920-07-27

Family

ID=23182193

Family Applications (1)

Application Number Title Priority Date Filing Date
US305755A Expired - Lifetime US1347849A (en) 1919-06-21 1919-06-21 Signaling-circuit

Country Status (2)

Country Link
US (1) US1347849A (fr)
FR (1) FR519084A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160214861A1 (en) * 2015-01-28 2016-07-28 Shin-Etsu Chemical Co., Ltd. Method and apparatus for producing hydrochloric acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160214861A1 (en) * 2015-01-28 2016-07-28 Shin-Etsu Chemical Co., Ltd. Method and apparatus for producing hydrochloric acid

Also Published As

Publication number Publication date
FR519084A (fr) 1921-06-04

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