US610393A - Telephone - Google Patents

Telephone Download PDF

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Publication number
US610393A
US610393A US610393DA US610393A US 610393 A US610393 A US 610393A US 610393D A US610393D A US 610393DA US 610393 A US610393 A US 610393A
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circuit
circuits
switch
signaling
ringing
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Expired - Lifetime
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/005Interface circuits for subscriber lines

Definitions

  • My invention relates to telephones.
  • My object is to dispense with the ordinary form of magneto-generator and bell and to provide simple and inexpensive means for signaling and cutting in and out the bell and talking-circuits; and a further object is to provide signaling means of such improved construction that a call can be given over a circuit of indefinite length.
  • the invention consists of a novel arrangement of instruments and circuits, as will appear more fully hereinafter.
  • the accompanying drawing is a diagrammatic view of two telephone-stations and the circuit connections therefor.
  • the telephone-stations are shown at A and B, and the numeral 1 designates the line-wire connecting the same.
  • the instrument-circuits are shown at 2, the same leading to ground G and embracing transmitters 3, induction-coils 4, and the ordinary receivers. Either a magnetic or variable -resistance transmitter may be used.
  • Signaling-circuits are shown at 5, the same embracingrelays 6, wound to a resistance adapted to the line- Wire circuit and main battery 7. Said circuit has one end grounded.
  • Local circuits are shown at S, the same embracing the contactpoints and armatures of the relays 6 and local batteries 9 and vibrating bells 10.
  • the ringing-up circuits are shown at 11, the same being grounded and having calling-keys.
  • Three point-switches 12 are employed for connecting the various circuits to the a line -wire, the switch-arms being electrically connected to the line-wire and the wires of the instrument signaling and ringing-up circuits leading to Serial No. 619,147. (No model.) I
  • switch-points which are shown at a, b, and c.
  • the operation is as follows: The switcharms normally rest on the switch-points b.
  • station A desires to call station 13
  • the operator at A first moves the switch-arm to point 0 and presses the calling-up button 11. This throws the grounded ringing-up circuits "of As station into the grounded signalingcircuit of Bs station and the relay of the latter station is actuated and the local circuit closed, ringing the bell.
  • the operator at A then moves the switch-arm back to point b.
  • Upon hearing the signaling the operator at B moves his switch-arm to point 0 and depresses his calling or ringing-.up-key, thereby sending a return signal through As relay and causing an actuation of his bell. Both operators then turn the switch-arms to point a, whereupon the instrument-circuits are thrown together and conversation can be had.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Description

N0. 6l0.393. Patented Sept. 6, {898.
S. S; FISHER.
TELEPH 0N E (Applicatim filed Jan. 14, 1897,)
(No Model.)
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"Enron.
ATENT SYDNEY SOLOMON FISHER, OF SAN FRANCISCO, CALIFORNIA.
TELEPHONE.
SPECIFICATION forming part of Letters Patent No. 610,393, dated September 6, 1898.
Application filed January 14, l 8 9 7- To all whom it may concern:
Be it known that I, SYDNEY SOLOMON FISHER, a citizen of the United States, resid ing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Telephones; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to telephones.
My object is to dispense with the ordinary form of magneto-generator and bell and to provide simple and inexpensive means for signaling and cutting in and out the bell and talking-circuits; and a further object is to provide signaling means of such improved construction that a call can be given over a circuit of indefinite length.
The invention consists of a novel arrangement of instruments and circuits, as will appear more fully hereinafter.
The accompanying drawing is a diagrammatic view of two telephone-stations and the circuit connections therefor.
The telephone-stations are shown at A and B, and the numeral 1 designates the line-wire connecting the same. The instrument-circuits are shown at 2, the same leading to ground G and embracing transmitters 3, induction-coils 4, and the ordinary receivers. Either a magnetic or variable -resistance transmitter may be used. Signaling-circuits are shown at 5, the same embracingrelays 6, wound to a resistance adapted to the line- Wire circuit and main battery 7. Said circuit has one end grounded. Local circuits are shown at S, the same embracing the contactpoints and armatures of the relays 6 and local batteries 9 and vibrating bells 10. The ringing-up circuits are shown at 11, the same being grounded and having calling-keys. Three point-switches 12 are employed for connecting the various circuits to the a line -wire, the switch-arms being electrically connected to the line-wire and the wires of the instrument signaling and ringing-up circuits leading to Serial No. 619,147. (No model.) I
the switch-points, which are shown at a, b, and c.
The operation is as follows: The switcharms normally rest on the switch-points b. When station A desires to call station 13, the operator at A first moves the switch-arm to point 0 and presses the calling-up button 11. This throws the grounded ringing-up circuits "of As station into the grounded signalingcircuit of Bs station and the relay of the latter station is actuated and the local circuit closed, ringing the bell. The operator at A then moves the switch-arm back to point b. Upon hearing the signaling the operator at B moves his switch-arm to point 0 and depresses his calling or ringing-.up-key, thereby sending a return signal through As relay and causing an actuation of his bell. Both operators then turn the switch-arms to point a, whereupon the instrument-circuits are thrown together and conversation can be had.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
In a telephone system, two stations connected by a line-wire Whose ends are in electric connection with switch-points, each station having a grounded instrument-circuit terminating in a'contact-point, a grounded signaling-circuit terminating in a contactpoint and embracing a main battery and a relay wound to a resistance adapted to the linewire circuit, a local circuit embracing a "contact-point, the armature of the relay, a local battery and a signal, and a normally open ringing-up circuit leading from the grounded signaling-circuit, terminating in a contactpoint and containing a circuit-closer, the three contact-points of the instrument, signaling and ringing-up circuits lying within the path of movement of the switch-points.
In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.
SYDNEY SOLOMON FISHER. \Vitnesses:
EDW. FISHER, H. R. TIMM.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277243A (en) * 1962-12-19 1966-10-04 Burroughs Corp Telephone adapter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277243A (en) * 1962-12-19 1966-10-04 Burroughs Corp Telephone adapter

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