US2512834A - Intercommunicating system - Google Patents

Intercommunicating system Download PDF

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Publication number
US2512834A
US2512834A US717276A US71727646A US2512834A US 2512834 A US2512834 A US 2512834A US 717276 A US717276 A US 717276A US 71727646 A US71727646 A US 71727646A US 2512834 A US2512834 A US 2512834A
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Prior art keywords
relay
group
contact
station
relays
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US717276A
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English (en)
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Legerth Karl Ingemar Bertil
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Individual
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Individual
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Definitions

  • the present invention relates to an intercom municatin-g system in'cltrd-ing a pl-i-i iality ef-sepa rate' stations eachcomprising a" combined mitterand re'eeiveii andat'leasttwd amplifiers:
  • @ne object of the invention is to proviti'e; a system in which any of amplifiers may be used fer the connection between two' arbitrarystations.
  • Another object of the invention-19w provide a system in which each station need not be donnected with eeteh amplifierby means of sepa rate wires.
  • Figure 1- is a; schematie diagram cafe-station,
  • Figure 2 is a schi'neti diagram of' thiee relay groupsbeltinging te a device for setting up- 2:- call;
  • Figure 4- is a schematm diagram finely: unitadapt'ed for selecting a, rela roup mit 66-- cupi'ed by 203111;
  • Figure 5 shows at modified embddi'me'fit of a cireiiit sho'wn Fig. 3.
  • the-number of 7 saw keys- 5 aorta-- spend to the number df-"stati0ns in the sy stern minus 0116i
  • For the-sake ofsimplieity oni keys 5 are shown' her'eli Further; there iska; re storing-key 6 andaloudsneaker i aka-usable asa; microphone.
  • FIG. 4 there is shown a diagram of a relayunit by means of which a disengaged relaygroup A, B or C is selected. There is a separate relay arrangement having relays I5 and I6 for each group A, B and C and each relay arrangement is provided with contacts I1 and I8 which are connected with corresponding contacts in the relay-groups. cv is connected to'the relay-unit.
  • the contacts co the relays I53 and IE3 will be operated in substantially the same way as the relays ISA and I6A, as is described above, and the contacts at will be connected with the operating winding I60 through the closed relay contacts 28 (of I53) and 29 (of I5A) and the relay contactof the relay I50.
  • the contact e When the start key I in Fig. 1 is operated the contact e will be connected with the negative terminal of the source of current through the contact lo and a cut-oil contact of a cut-ofi relay 2.
  • This relay is controlled by a control relay 3, the one terminal of the winding of said latter relay being permanently connected to the negative terminal of the source of current while the other terminal of said winding is connected with the plus terminal through the contacts Id and I b, when the start key is operated.
  • the relay 3 is operated and its contact 3a closes a circuit through the relay 2 which will cut-off the connection of the contact e with the negative terminal of the source of current. Therefore, the contact e will be negative only for a short period.
  • the contact 022 (that is all contacts co) will be positive for a short period through the contact I b and a cut-oil contact of the relay 2 which is energized and cutsofl. the connection between the contact 01) and the plus terminal of the source of current after a very short interval.
  • the contact I8 is connected through the wire 20 to one terminal of the operating windings of the relays I2, the other terminals of said windings being connected to the contacts e.
  • the station contact nection in fact is effected through impulse relays (not shown) of the same kind as the relays 9 for the connection of the relays 8 to the wire I0.
  • the relay-unit according to Fig. 4 is in the position as shown and the start key in the station I is operated the relay I2 of the relaygroup A and corresponding to the station I will be operated due to the short negative and positive impulses through the contacts at and IBA, respectively.
  • the loud speaker I of the station I has been connected to the input of the amplifier in the relay-group A as described hereinbefore.
  • the station contact d has been connected to the wire I0 through the contact I2b, one end of the windings the winding of the relay 4 is permanently connected to the negative terminal of the source of current.
  • the winding will be passed by a current so that the relay 4 is energized during a short interval.
  • the relay contacts 4a and 4b are closed with the result that the contacts 0H and d are connected with the negative terminal of the source of current for a short period.
  • The-newrelaygroup isonly connected in parallel with the relaygroups already existing,- w H
  • the contacts may be arranged in another way, for instance some of them belonging to the start keyJ may be transferred to the relay 2.,
  • the system may be supplied by a single source of current, but itis also possibleto use-a separate source of current for each relay-group andta separate source of current for the relay-unit; If balanced two-way amplifiers are used. the. speaking ,or, listening keys may of course be omitted..
  • a plurality' of separate stations each comprising a combined'transmitter and receiver, a source of current, at least two amplifiers, a group of relays.
  • each of said groups comprising relay-sets individually connected with one of said stations, a relay-unit connected with said relay-groups and with said stations andadapted for selecting a relay-group not occupied by a call, a connecting relay in each'of said relaysets the operating winding of which having one terminal connected to a contact in the respective station and the other terminal connected to a contact insaid relay-unit, which contact is com+ mon to all of said connectin relays in each relay-group, a start key in each station for op-.
  • said relay-unit to select an idle relaygroup and to connect its contact common to all of said connecting relays in said selected relay.- group to one terminal of said source oi'current and for connecting said contact in a calling station, which contact is connected to the wind ing of said connecting relays. tothe other. ter.-.. minal otssaid source ofcurrents-the connecting relay of-saidselected -relay-group-belonging to the relay-set connected with said calling station thereby being actuated so, that it connects the. combined-transmitter and receiver of said. call-I ing station to the amplifier belonging to said; selected relay-group,,and keys in each station for calling-any of theother stations, said keyts actuating the. relay-group selected by saidrelay-1 unitzto connect the transmitterandreceiverof. a calledstationto the amplifier belonging .to, said-relay-group.
  • va pl rality of separate station-s each. comprising a. combined transmitter and receiver, .a source of current,fat least two amplifiers, .a group. of relays:
  • a plurality of separate stations each comprising a combined transmitter and receiver, asource of current, at. least two amplifiers, a group of relays for eachlof said amplifiers, each .of said groups .comprising relay-sets individually connected with one of said stations, a relay-unit connected with said relay-groups andiwith said .startion's andadaptedfor selecting a relay-group system, a plunot occupied-by a call, a connecting relay inea'ch oi saidrelay sets-the operatingiwinding of which having one terminal connected to a contacttin the-respecti vestation and-theother terminal connectedtdacontact insaid relay-unit, which contact is-common-toall of said connecting re.- lays in each relay-group a start.
  • said normal and make contacts selecting an idle relay group which is energized to connect the combined transmitter and receiver of a calling station to the amplifier belonging to said relaygroup and keys in each station for calling any of the other stations, said keys actuating the relay-group selected by said relay-unit to connect the transmitter and receiver of a called station to the amplifier belonging to said relaygroup.
  • a plurality of separate stations each comprising a combined transmitter and receiver, a source of current, at least three amplifiers a group of relays for each of said amplifiers, each of said groups comprising relay-sets individually connected with one of said stations, and a release relay, a relay-unit comprising a number of relay-sets equal to the number of relay-groups, each lastmentioned relay-set comprising two relays, one controlling the energization of the other and being provided with an operating winding connected between a group contact connected with a corresponding relay-group, and one terminal of the source of current and provided with a holding winding a start key in each station for energization of said control relays which then are held by its holding windings which after said energization are connected between one terminal of said source of current and another group contact connected with said corresponding relaygroup, the last mentioned group contact being connected with the other terminal of said source of current via a contact of the release relay of said group, the other relays of said relay
  • a plurality of separate stations each comprising a combined transmitter and receiver, a source of current, at least two amplifiers, a group of relays for each of said amplifiers, each of said groups comprising relay-sets individually connected with one of said stations, each set being provided with a connecting relay having an operating and a holding winding and with an impulse relay controlling the energization of said connecting relay, the windings of said impulse relays being all connected in parallel to one terminal of said source of current, a relay-unit connected with said relay-groups and with said stations and adapted for selecting a, relay-group not occupied by a call, a start key in each station for operating said relay-unit to select an idle relay-group and for operating said selected relay-group to connect the combined transmitter and receiver of a calling station to the amplifier belonging to said relay-group and keys in each station for calling any of the other stations, said keys actuating said impulse relays which connect one end of the operating windings of said connecting relays in said selected relay-group to
  • a plurality of separate stations each comprising a combined transmitter and receiver, a source of current, at least two amplifiers, a group of relays for each of said amplifiers, each of said groups comprising relay-sets individually connected with one of said stations, each set being provided with a connecting relay having an operating and a holding winding and with an impulse relay controlling the energization of said connecting relay, the windings of said impulse relays being all connected in parallel to one terminal of said source of current, a relay-unit connected with said relay-unit to select an idle relay-group and for operating said selected relay-group, to connect 5.
  • the combined'transmitter and receiver of a calling station to the amplifier belonging to said relay-group, a calling relay in each station, in
  • said latter connection comprising a condenser limiting the 'time of current flow in said connection to the period of charging said condenser, and keys in each station for calling any of the other stations, said keys actuating said impulse relays which connect one end of the operating windings for said connecting relays in said selected relaygroup to one terminal of said source of current I and said keys closing said open contact so that the connecting relay which corresponds to the 12 key belonging to 8, called station is energized, which energized connecting relay thereby connects the transmitter and receiver of said called station to the amplifier belonging to said selected relay group.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
US717276A 1946-01-24 1946-12-19 Intercommunicating system Expired - Lifetime US2512834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE263429X 1946-01-24

Publications (1)

Publication Number Publication Date
US2512834A true US2512834A (en) 1950-06-27

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ID=20306518

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US717276A Expired - Lifetime US2512834A (en) 1946-01-24 1946-12-19 Intercommunicating system

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US (1) US2512834A (de)
CH (1) CH263429A (de)
DE (1) DE846563C (de)
GB (1) GB647765A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741667A (en) * 1953-02-11 1956-04-10 Commercial Radio Sound Corp Privacy guarded telephone intercommunicating system
US2744966A (en) * 1950-10-05 1956-05-08 Executone Inf Sys Inc Intercommunication system
US3130272A (en) * 1958-10-17 1964-04-21 Talk A Phone Co Intercommunication system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1356256A (en) * 1918-08-19 1920-10-19 Western Electric Co Telephone system
US1647606A (en) * 1925-11-28 1927-11-01 J S Timmons Inc Intercommunication system
US2036023A (en) * 1933-06-09 1936-03-31 Bell Telephone Labor Inc Telephone system
US2054933A (en) * 1934-01-08 1936-09-22 John A Frazier Return speech control
US2110358A (en) * 1936-06-06 1938-03-08 Electro Acoustic Products Comp System for sound reproducing apparatus
US2200814A (en) * 1936-08-31 1940-05-14 Siemens Ag Telephone system
US2269143A (en) * 1940-06-28 1942-01-06 Webster Electric Co Inc Communication system
US2269142A (en) * 1940-06-28 1942-01-06 Webster Electric Co Inc Communication system
US2347080A (en) * 1942-12-14 1944-04-18 Webster Electric Co Inc Communication system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1356256A (en) * 1918-08-19 1920-10-19 Western Electric Co Telephone system
US1647606A (en) * 1925-11-28 1927-11-01 J S Timmons Inc Intercommunication system
US2036023A (en) * 1933-06-09 1936-03-31 Bell Telephone Labor Inc Telephone system
US2054933A (en) * 1934-01-08 1936-09-22 John A Frazier Return speech control
US2110358A (en) * 1936-06-06 1938-03-08 Electro Acoustic Products Comp System for sound reproducing apparatus
US2200814A (en) * 1936-08-31 1940-05-14 Siemens Ag Telephone system
US2269143A (en) * 1940-06-28 1942-01-06 Webster Electric Co Inc Communication system
US2269142A (en) * 1940-06-28 1942-01-06 Webster Electric Co Inc Communication system
US2347080A (en) * 1942-12-14 1944-04-18 Webster Electric Co Inc Communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744966A (en) * 1950-10-05 1956-05-08 Executone Inf Sys Inc Intercommunication system
US2741667A (en) * 1953-02-11 1956-04-10 Commercial Radio Sound Corp Privacy guarded telephone intercommunicating system
US3130272A (en) * 1958-10-17 1964-04-21 Talk A Phone Co Intercommunication system

Also Published As

Publication number Publication date
DE846563C (de) 1952-08-14
CH263429A (de) 1949-08-31
GB647765A (en) 1950-12-20

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