US1795494A - Telephone system - Google Patents

Telephone system Download PDF

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Publication number
US1795494A
US1795494A US325534A US32553428A US1795494A US 1795494 A US1795494 A US 1795494A US 325534 A US325534 A US 325534A US 32553428 A US32553428 A US 32553428A US 1795494 A US1795494 A US 1795494A
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US
United States
Prior art keywords
relay
contacts
switch
armature
switches
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
US325534A
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English (en)
Inventor
Kusche Walter
Dahms Rudolf
Pfleiderer Fritz
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US1795494A publication Critical patent/US1795494A/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
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Definitions

  • Tris invention relates to telephone systems and particularly to systems in which communication channels involving speech ampliliers or repeaters are built up by automatic switches responsive to dial impulses.
  • lt is an object o' this invention to render speech ainpliiiers accessible over automatically established connections commonly available to a plurality of lines of different characteristics.
  • a feature of the invention is a means for automatically adjusting the characteristics of the speech amplifier taken for use to the characteristics of the line.
  • Each amplilier has associated with it an automatic switch which is set into operation upon the seizure of the amplifier and which then automatically moves into a particular position correspond ing to the line from which the connection is extended and in which position artificial networks corresponding to the characteristics of such line are appropriately connected to the amplifier.
  • the amplilier is properly adjusted in the manner set forth in accordance with the characteristics of both the calling and the called line.
  • the calling lines are divided into groups and in each group all the lines have the same characteristics so that the amplifier is adjusted in accordance with the group from which the call originates.
  • FIG. 1 The drawings consist of three sheets designated Fig. 1, Fig. 2 and Fig. 3 and when placed as indicated in Fig. 4l diagrammatically illustrate the essential features of the invention.
  • Fig. 2a represents circuits and apparatus identical with those of Fig. 2
  • Fig. Se represents circuits and apparatus identical with those of Fig. 3.
  • the calling lines are arranged in groups wherein each line of a group has the same characteristics as each other line of that group and the lines of one group may differ in their characteristics from the lines of other groups.
  • switch 1 having arms 2, 8 and 4L is accessible through any well known line switch or line finder arrangement to lines of one characteristic and the switch 5 having arms 6, 7 and 8 is accessible to lines of another characteristic. Only one level of such switches is here represented, it being understood that the same or similar wiring arrangements are made in other levels, that the different levels are directively selected and that the contacts in each level are automatically selected.
  • the irst contacts of the banks of these selectors are multipled together and extend to a secondary selective switch. ylihus the iirst contacts ot the banks traversed by arms 2 and 6 are connected together and extend to arm 9 of switch 12 and the first contacts of the banks traversed by arms 3 and 7 are connected together and extend to arm 10 of switch 12.
  • the first contacts of the banks traversed by the corresponding testing arms 4 andl 8 are not multipled, as usual, but lead to a series of relays 13 and 14, respectively.
  • Each of the secondary selectors 12 and 17 is shown with two levels, it being ⁇ understood, as befoi'e, that the different levels are directively selected and the contacts in the levels are automatically selected. ln the present case the first contacts in each level shown and in each switch shown are multipled 'io- Aeether and lead to a single speech amplifier.
  • the testing contacts are not multiplcd but have individual conductors extending therefrom to a. plurality of relays in a number of chain circuits, somewhat in the same manner as in connection with the first selectors.
  • one of the relays 25 to 29 will be operated in series with relay and by opening ⁇ a chain eircuit including the outer left hand armature and back contact of one of such chain relays will prevent any other selector from approprinting ⁇ the same speech amplifier.
  • a relay within F 2a similar in all respects to one of the chain relays 25 to Q9 will be operated in series with a relay similar to relay 30 and the chain circuit controlled thereby will be opened and the second contacts traversed by arms 11 and 20 will loe marked as busy.
  • n- V-lo il2 and i3 Associated with the incoming' end are a plurality of artificial n- V-lo il2 and i3 connected to the speech a .Y incr by an automatic switch le havi lo to 48, inclusive, and a stepping l ainV a stepping magnet 57. serves to extend the conductors-i 31 ncoining end of the speech amplifier a various types or attenuating netersed by arms 51 to 5l, inclusive.
  • relay 13 will be -ne K e rlllierefore, a circuit will be extended f the armature and rom ground,
  • relay 30 Upon the operation of relay 30, hereinbefore described, a connection will be established from ground, interrupter G1, conductor G2, back Contact and right hand armature rela,7 33, armature 63 of relay 30, and
  • a line calling over selector 1 will require artificial network 43 to be connected to the speech amplifier and an attenuating network interposed in the line such as that connected between the first contacts of switch traversed by arms 5l, 52, 53 and 54.
  • relay 14 would be energized and a circuit established over the outer right hand armature and front contact of relay 14, through the associated contact and armature ofrelay 36, to conductor 65, thus marking the second contacts of switches 50 and 44.
  • a line calling over selector 5 will require an artificial network 42 to be connected to the speech am* plifier and an H type attenuating network interposed in the line through the second contacts of switch 50.
  • switch 12 was set on its second level resulting in the energization of relay 26.
  • Switch 67 corresponds to the vsecond level of the selector 12 and switch 66 corresponds to the iirst level thereof. Therefore, a connection will ⁇ be established from ground, interruptor 61, conductor 62, back contact and armature 68 of relay 69, conductor 70, inner left hand armature and front contact of relay 26, conductor 71,4to the winding 72 of the stepping magnet controlling switch 67.
  • the stepping magnet thereupon moves the arms 73 to 7 8, inclusive, forward step by step. Let it be assumed now that the first contacts traversed by the arma of selector 6.7 are busy.
  • relay 69 extends the outgoing connections from the speech amplifier to the arms and 76.
  • the switch 67 now yconnects an appropriate balancing network 83 to the outgoing end of the speech amplifier and by the operation of relay 82 causes an appropriate attenuating network 1 to be interposed in the line.
  • relay 82 a connection is established from ground, the armature and front arm 90 whereupon relay 92 becomes operated and opening the circuit of stepping magnet 95 allows the switch 85 to come to rest whereupon an H type attenuating network is ini terposed between the speech amplifier and respectively, and thence through the contacts of relay to the talking conductors leading back to the calling line.
  • These relays in turn control battery and ground connections to the conductors leading to the called line so that by proper manipulation of the calling line any automatic switches connected to the called line may be operated.
  • switches 1 and 12 may be restored in any appropriate manner whereupon relays 13, 16, 26 and 30 will become deenergized.
  • relays 33 and 84 will become deenergized and by closing their right and left hand contacts, respectively, will connect the interrupter 61 through the switch arms 56 and 48, respectively, to the stepping magnets 57 and 49, whereupon the switches and 44: will be returned to normal.
  • relay 69 will become deenergized upon the deenergization of relay 26 and a connection will be extended from the interrupter 61 through the armature 68 and arm 78 to stepping magnet 72 whereupon switch 67 will be returned to normal.
  • the ground will be removed from the winding ot' relay 92 and this will close a circuit for the energization of stepping magnet 95, whereupon switch will be returned to normal.
  • Fig. 2a represents an organization of relays similar to those shown in the upper part of Fig. 2 and Fig. 3a represents an organization of switches, speech amplifiers etc, similar to Lthat shown in the remainder of Fig. 8. It will be noted that switches 66 and 67 show multiple taps to the conductors outgoin from their different bank contacts. It will e understood that the switches in Fig. 3a, for
  • switches 66 and 67 will have their Contact banks multipled to the contact banks of switches 66 and 67.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
US325534A 1927-12-15 1928-12-12 Telephone system Expired - Lifetime US1795494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1795494X 1927-12-15

Publications (1)

Publication Number Publication Date
US1795494A true US1795494A (en) 1931-03-10

Family

ID=7743641

Family Applications (1)

Application Number Title Priority Date Filing Date
US325534A Expired - Lifetime US1795494A (en) 1927-12-15 1928-12-12 Telephone system

Country Status (3)

Country Link
US (1) US1795494A (fr)
BE (1) BE356540A (fr)
FR (1) FR665579A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580709A (en) * 1947-11-14 1952-01-01 Automatic Elect Lab Toll switching telephone system having automatic amplifier insertion and gain setting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580709A (en) * 1947-11-14 1952-01-01 Automatic Elect Lab Toll switching telephone system having automatic amplifier insertion and gain setting

Also Published As

Publication number Publication date
BE356540A (fr)
FR665579A (fr) 1929-09-20

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