GB428856A - Improvements in impulsing arrangements particularly applicable to automatic telephone systems - Google Patents

Improvements in impulsing arrangements particularly applicable to automatic telephone systems

Info

Publication number
GB428856A
GB428856A GB26133/33A GB2613333A GB428856A GB 428856 A GB428856 A GB 428856A GB 26133/33 A GB26133/33 A GB 26133/33A GB 2613333 A GB2613333 A GB 2613333A GB 428856 A GB428856 A GB 428856A
Authority
GB
United Kingdom
Prior art keywords
impulsing
particularly applicable
telephone systems
automatic telephone
rectifiers
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
GB26133/33A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB428856A publication Critical patent/GB428856A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

428,856. Automatic exchange systems. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. Sept. 21, 1933, No. 26133. Convention date, Oct. 4, 1932. [Class 40 (iv)] In an arrangement in which impulses from dial springs 12 are repeated by relays R3, R4 connected in parallel and having separate batteries B3, B4, differences in battery potential and in circuit resistance give rise to irregular operation of the relays, which is prevented by rectifiers L1, L2. For example, when the circuits are opened, the more strongly energized relay would, in the absence of rectifiers, cause a reverse current through the other which makes the first release slowly and the other quickly.
GB26133/33A 1932-10-04 1933-09-21 Improvements in impulsing arrangements particularly applicable to automatic telephone systems Expired GB428856A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE428856X 1932-10-04
SE760976X 1932-10-04

Publications (1)

Publication Number Publication Date
GB428856A true GB428856A (en) 1935-05-21

Family

ID=26656273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26133/33A Expired GB428856A (en) 1932-10-04 1933-09-21 Improvements in impulsing arrangements particularly applicable to automatic telephone systems

Country Status (1)

Country Link
GB (1) GB428856A (en)

Similar Documents

Publication Publication Date Title
GB428856A (en) Improvements in impulsing arrangements particularly applicable to automatic telephone systems
GB522457A (en) Improvements in or relating to systems of simultaneous telephony on a number of lines
US3187105A (en) Pulse corrector
US2608607A (en) Contact spark suppression circuit
GB468040A (en) Improvements in or relating to electric summating apparatus
GB487339A (en) Device for receiving and retransmitting signals in long distance telephone lines
GB222847A (en) Improvements in impulse repeaters, particularly for telephone systems
GB543065A (en) Improvements in or relating to telephone systems
GB414904A (en) Improvements in telephone systems
US2403877A (en) Telephone line circuit
GB484892A (en) Electromagnetic relay circuits
US2177512A (en) Electric communication system
US1632035A (en) Automatic telephone system
GB433797A (en) Improvements in alternating current impulse relays
GB242713A (en) Improvements in automatic telephone systems
GB656350A (en) Relay chain
GB467867A (en) Improvements in or relating to telephone and like signalling systems
GB357620A (en) Improvements in call metering circuits in telephone systems
GB460003A (en) Improvements in impulse receiving arrangements particularly for use in telephone systems
GB363368A (en) Improvements in or relating to control circuits for electric relays
GB454385A (en) Switching arrangement in coin boxes for telephone systems
GB813339A (en) Improvements in or relating to electrical signalling systems
GB250037A (en) Improvements in or relating to telephone systems
GB945454A (en) Improvements in or relating to automatic telephone systems
GB560891A (en) Improvements relating to the repetition of electrical impulses