GB202308A - Circuit arrangements for automatic switches of the type used in telephone systems - Google Patents

Circuit arrangements for automatic switches of the type used in telephone systems

Info

Publication number
GB202308A
GB202308A GB20222/23A GB2022223A GB202308A GB 202308 A GB202308 A GB 202308A GB 20222/23 A GB20222/23 A GB 20222/23A GB 2022223 A GB2022223 A GB 2022223A GB 202308 A GB202308 A GB 202308A
Authority
GB
United Kingdom
Prior art keywords
type used
telephone systems
circuit arrangements
automatic switches
short
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
GB20222/23A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Publication of GB202308A publication Critical patent/GB202308A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

202,308. Automatic Telephone Manufacturing Co., Ltd., (Assignees of Bellamy, J. I.). July 22, 1921, [Convention date]. Drawings to Specification. Slow-release relays.-The usual copper-sleeved release relay of an automatic telephone selector is provided with two windings, one of which is short-circuited during the transmission of impulses. This has the effect of increasing the current through the other winding, consisting of larger turns, so as to give an increased number of lines of force each time its circuit is closed, whilst the short-circuited winding also acts as an additional copper sleeve to further increase the sluggishness.
GB20222/23A 1921-07-22 1922-06-09 Circuit arrangements for automatic switches of the type used in telephone systems Expired GB202308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US202308XA 1921-07-22 1921-07-22

Publications (1)

Publication Number Publication Date
GB202308A true GB202308A (en) 1923-10-09

Family

ID=21797455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20222/23A Expired GB202308A (en) 1921-07-22 1922-06-09 Circuit arrangements for automatic switches of the type used in telephone systems

Country Status (1)

Country Link
GB (1) GB202308A (en)

Similar Documents

Publication Publication Date Title
GB202308A (en) Circuit arrangements for automatic switches of the type used in telephone systems
GB183431A (en) Improvements in or relating to telephone systems
GB223399A (en) Impulse circuit arrangements for automatic switches or repeaters of the type used in telephone systems
SU26343A1 (en) Constant current morse tsi
GB178145A (en) Improvements in and relating to the telegraphic transmission of pictures
DE638537C (en) Hybrid circuit for telephone systems with four-wire and two-wire circuits
GB205505A (en) Impulse circuit arrangements for automatic switches or repeaters of the type used intelephone systems
US1634271A (en) Composite ringer
DE888266C (en) Arrangement for switching a telephone subscriber station to carrier-frequency two-way operation
GB179930A (en) Improvements in or relating to telephone systems
AT141022B (en) Circuit arrangement for telephone systems with dialer operation.
GB457215A (en) Improvements in or relating to telephone circuits
GB153405A (en) An improved alternating current relay
GB263080A (en) Improvements in automatic telephone systems
AU165521A (en) Improvements inno-voltage automatic circuit breakers
GB428828A (en) Improvements relating to trunk communication cables for four-wire circuit operation
AU111921A (en) Improvements in selector switches for automatic telephone systems
GB225932A (en) Improvements in electric switching apparatus suitable for use in telephony
GB207219A (en) Automatic telephone system and switching apparatus therefor
AU2044524A (en) Improved circuit arrangements for automatic selectors used in telephone systems
GB459287A (en) Improvements in or relating to wiper switches such as are used in automatic telephone systems
GB246544A (en) Improvements in two-way transmission systems with repeaters, particularly for telephone lines
AU1494320A (en) An automatic electric circuit breaker
GB172170A (en) Improvements in or relating to electrical switch gear
GB177130A (en) Improvements in or relating to telephone systems