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Publication numberUS2585904 A
Publication typeGrant
Publication dateFeb 19, 1952
Filing dateOct 29, 1948
Priority dateOct 29, 1948
Publication numberUS 2585904 A, US 2585904A, US-A-2585904, US2585904 A, US2585904A
InventorsBusch Aloysius J
Original AssigneeBell Telephone Labor Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Crossbar telephone system
US 2585904 A
Abstract  available in
Description  available in
Claims  available in
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2392089 *Jun 23, 1944Jan 1, 1946Bell Telephone Labor IncSwitching system
US2413708 *Nov 9, 1944Jan 7, 1947Bell Telephone Labor IncTelephone system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2679552 *Apr 10, 1950May 25, 1954Ericsson Telefon Ab L MCross-bar switch system with several markers
US2686838 *Apr 6, 1950Aug 17, 1954Bell Telephone Labor IncTranslator
US2735894 *May 29, 1952Feb 21, 1956Ingohorel
US2761907 *Mar 31, 1952Sep 4, 1956Int Standard Electric CorpAutomatic telephone systems
US2806088 *Dec 3, 1953Sep 10, 1957Bell Telephone Labor IncCommunication system
US2853552 *May 17, 1954Sep 23, 1958Nederlanden StaatTrunking diagram for an automatic telecommunication system
US2872527 *Sep 27, 1955Feb 3, 1959Int Standard Electric CorpAutomatic telecommunication exchanges
US2873322 *Dec 28, 1954Feb 10, 1959Daniel Vigren StenAutomatic service control system with fault recording
US2876286 *Sep 10, 1953Mar 3, 1959Oberman Roelof M MArrangement for the identification of special service apparatus required for connections in a telecommunication system
US2918533 *Dec 19, 1956Dec 22, 1959IttRegister-translator crossbar telephone system
US2955165 *Oct 7, 1957Oct 4, 1960Bell Telephone Labor IncElectronic telephone switching system
US3007006 *Jan 27, 1956Oct 31, 1961North Electric CoAutomatic telephone system
US3007008 *Jul 15, 1955Oct 31, 1961North Electric CoAutomatic telephone system
US3008010 *Dec 19, 1955Nov 7, 1961Int Standard Electric CorpTelephone systems
US3036160 *Aug 18, 1958May 22, 1962IttTelephone connector system using controlling crossbar switch
US3120581 *Nov 19, 1956Feb 4, 1964Bell Telephone Labor IncElectronic automatic telephone switching system
US3127480 *Sep 9, 1960Mar 31, 1964Ericsson Telefon Ab L MAutomatic telephone system
US3175043 *Sep 22, 1958Mar 23, 1965Siemens And Halske Ag Berlin ACoupling field selection system
US3257513 *Jan 22, 1963Jun 21, 1966Bell Telephone Labor IncCommunications switching network
US3378650 *Oct 15, 1964Apr 16, 1968Bell Telephone Labor IncCommunication system signaling and testing equipment
US3417206 *Sep 14, 1967Dec 17, 1968Hitachi LtdCrossbar switching system providing an increased number of possible paths to a selected registered group
US3428947 *Mar 31, 1965Feb 18, 1969Bell Telephone Labor IncScanning circuit for scanning all of a group of points if one point has a change of state
US3505482 *Oct 7, 1966Apr 7, 1970Int Standard Electric CorpAutomatic telecommunication switching system
US3519753 *Jun 22, 1966Jul 7, 1970Int Standard Electric CorpArrangement for controlling crosspoints to complete connecting paths in telephone exchange systems
US3876885 *Apr 18, 1974Apr 8, 1975Catterall John MasonPreference lockout circuit for common control switching system
US3995117 *Jan 22, 1976Nov 30, 1976Western Electric Company, Inc.Message billing arrangement for a communication system
US4208553 *Nov 22, 1978Jun 17, 1980Bell Telephone Laboratories, IncorporatedTelephone office assignment verification
US4415773 *Oct 29, 1981Nov 15, 1983Western Electric Company, Inc.Methods of establishing a switching connection within a switching system
US4744102 *Jan 27, 1986May 10, 1988Koster Frederick HCrossbar line hunting arrangement
DE1098046B *Nov 3, 1954Jan 26, 1961Western Electric CoSchaltungsanordnung fuer Fernsprechanlagen mit Haupt- und Unteraemtern
DE1202348B *Feb 23, 1963Oct 7, 1965Standard Elektrik Lorenz AgVerfahren zur Pruefung der Verbindungsadern in Fernmeldevermittlungs-, insbesondere Fernsprechwaehlanlagen
DE1274199B *Mar 5, 1963Aug 1, 1968Western Electric CoSchaltungsanordnung zur selbsttaetigen UEberwachung des Verbindungsaufbaus in einer Fernsprechvermittlungsanlage mit mehreren, ueber Fernleitungen miteinander in Reihe aufeinanderfolgend verbundenen Vermittlungsaemtern
U.S. Classification379/246, 379/275, 379/291
International ClassificationH04Q3/00
Cooperative ClassificationH04Q3/0004
European ClassificationH04Q3/00B