GB547553A - Improvements in telecommunication exchange systems - Google Patents

Improvements in telecommunication exchange systems

Info

Publication number
GB547553A
GB547553A GB5911/40A GB591140A GB547553A GB 547553 A GB547553 A GB 547553A GB 5911/40 A GB5911/40 A GB 5911/40A GB 591140 A GB591140 A GB 591140A GB 547553 A GB547553 A GB 547553A
Authority
GB
United Kingdom
Prior art keywords
circuit
valve
impulse
cathode
anode
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
Application number
GB5911/40A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority to US263585A priority Critical patent/US2224677A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB5911/40A priority patent/GB547553A/en
Priority to NL97621A priority patent/NL52685C/xx
Priority to FR866501D priority patent/FR866501A/en
Priority to CH223660D priority patent/CH223660A/en
Publication of GB547553A publication Critical patent/GB547553A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/525—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using tubes in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

547,553. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. (Western Electric Co., Inc.). April 2, 1940, No. 5911. [Class 40 (iv)] In a system using a cathode-ray tube as a selector the beam is held in a deflected position by means of a circuit over itself. The invention is described with reference to a ten-line exchange in which each subscriber has a cathode ray selector. Normally the cathode beam impinges on the home terminal 23. When the dial is operated the bias on the grid of a valve 18 is intermittently reduced and the impulses are passed on to a further valve 19. The first impulse since it increases the current in valve 18 increases the voltage drop in a resistance 35, so modifies the voltage of the deflector plates to cause the beam to move to the next target. Here it completes the anode circuit of valve 19 via resistance 35 transformer primary 52 and a group of resistances 16. The resultant voltage drop in 35 is such as to hold the beam in its new position. The kick produced in the dial circuit by the transformer 20 is such as to neutralize the originating impulse. Subsequent impulses cause the deflection of the beam over the terminals in succession, the beam being held after the termination of each impulse because its movement has cut out one of the resistances 16 and so increased the steady anode current of valve 19. When the beam stops, a direct current calling circuit and subsequently a speech circuit exist over the beam shown and that of the wanted party in its home position. Filters 15 keep the speech currents out of the control circuits. When the calling party hangs up, the anode circuit of 19 is broken and the beam returns to its normal position.
GB5911/40A 1939-03-23 1940-04-02 Improvements in telecommunication exchange systems Expired GB547553A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US263585A US2224677A (en) 1939-03-23 1939-03-23 Signaling system
GB5911/40A GB547553A (en) 1939-03-23 1940-04-02 Improvements in telecommunication exchange systems
NL97621A NL52685C (en) 1939-03-23 1940-04-12
FR866501D FR866501A (en) 1939-03-23 1940-04-13 Signaling systems and the like
CH223660D CH223660A (en) 1939-03-23 1940-04-20 Installation of automatic exchange for telecommunications.

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US263585A US2224677A (en) 1939-03-23 1939-03-23 Signaling system
GB5911/40A GB547553A (en) 1939-03-23 1940-04-02 Improvements in telecommunication exchange systems
NL97621A NL52685C (en) 1939-03-23 1940-04-12
FR866501T 1940-04-13
CH223660T 1940-04-20

Publications (1)

Publication Number Publication Date
GB547553A true GB547553A (en) 1942-09-02

Family

ID=9804924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5911/40A Expired GB547553A (en) 1939-03-23 1940-04-02 Improvements in telecommunication exchange systems

Country Status (5)

Country Link
US (1) US2224677A (en)
CH (1) CH223660A (en)
FR (1) FR866501A (en)
GB (1) GB547553A (en)
NL (1) NL52685C (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR857806A (en) * 1939-04-07 1940-10-01 Materiel Telephonique Electrical pulse controlled system
US2474224A (en) * 1939-04-28 1949-06-28 Int Standard Electric Corp Electronic switch
NL69984C (en) * 1939-05-26
US2446945A (en) * 1942-08-25 1948-08-10 Rca Corp Electronic computing device
US2436677A (en) * 1942-12-31 1948-02-24 Rca Corp Incremental deflection of cathoderay beam
US2498081A (en) * 1944-12-29 1950-02-21 Bell Telephone Labor Inc Electronic counting
US2517712A (en) * 1945-01-24 1950-08-08 Bendix Aviat Corp Electronic counter
US3340361A (en) * 1945-07-09 1967-09-05 Bell Telephone Labor Inc Signaling system with cathode ray tube quantizer
US2528020A (en) * 1945-07-24 1950-10-31 Philco Corp Mask controlled feedback system for cathode-ray tubes
US2477008A (en) * 1945-08-01 1949-07-26 Rosen Leo Electrical apparatus
US3104316A (en) * 1945-08-20 1963-09-17 Philip H Allen Registers
NL71624C (en) * 1945-09-20
US2472774A (en) * 1945-10-17 1949-06-07 Farnsworth Res Corp Irregular interlace scanning system
US3076146A (en) * 1945-12-27 1963-01-29 Bell Telephone Labor Inc Cathode beam tube circuit having means for converting current variations to stepped waveform
US2556179A (en) * 1946-03-02 1951-06-12 Int Standard Electric Corp Multiple pulse producing system
BE473041A (en) * 1946-04-06
US2528100A (en) * 1946-05-31 1950-10-31 Bell Telephone Labor Inc Electronic calculator
NL80422C (en) * 1946-10-23
US2531624A (en) * 1947-05-01 1950-11-28 Bell Telephone Labor Inc Selective signaling system
US2719248A (en) * 1947-07-11 1955-09-27 Josephson Bengt Adolf Sanmel Electron discharge device
US2565486A (en) * 1947-11-10 1951-08-28 Int Standard Electric Corp Pulse duration separation system
US2587734A (en) * 1947-12-22 1952-03-04 Meguer V Kalfaian Modulator tube and circuits
US2786193A (en) * 1948-03-10 1957-03-19 Raytheon Mfg Co Underwater sound system
US2599368A (en) * 1948-05-10 1952-06-03 Bell Telephone Labor Inc Beam switching system
US2670405A (en) * 1948-06-10 1954-02-23 Bell Telephone Labor Inc Signaling system employing electron beams
US2599949A (en) * 1948-06-24 1952-06-10 Nat Union Radio Corp Electronic stepping switch
US2781171A (en) * 1948-09-17 1957-02-12 Northrop Aircraft Inc Electronic counting tube
US2560166A (en) * 1949-01-14 1951-07-10 Jr William E Glenn Pulse analyzer
US2632147A (en) * 1949-02-09 1953-03-17 Bell Telephone Labor Inc Communication system employing pulse code modulation
US2564908A (en) * 1949-03-08 1951-08-21 Nat Union Radio Corp Voltage sampling and electron beam holding arrangement
GB656170A (en) * 1949-07-29 1951-08-15 Gen Electric Co Ltd Improvements in and relating to cathode ray tube distributors, for use, for example,in multi-channel pulse signalling systems
US2609455A (en) * 1949-11-30 1952-09-02 Bell Telephone Labor Inc Telephone system
US2728911A (en) * 1950-04-11 1955-12-27 Cutler Phil Frequency selective device
US2704336A (en) * 1951-01-03 1955-03-15 Kazan Benjamin Pulse counting tube
US2795376A (en) * 1951-08-17 1957-06-11 Stevens Res Foundation Computing unit for addition and multiplication
US2940047A (en) * 1955-09-14 1960-06-07 Burroughs Corp Multi-position electronic gating circuits
US3035202A (en) * 1959-04-21 1962-05-15 Gen Dynamics Corp Counting tube system

Also Published As

Publication number Publication date
NL52685C (en) 1942-06-15
US2224677A (en) 1940-12-10
CH223660A (en) 1942-09-30
FR866501A (en) 1941-08-19

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