GB596444A - Telecommunication switching systems - Google Patents

Telecommunication switching systems

Info

Publication number
GB596444A
GB596444A GB5242/45A GB524245A GB596444A GB 596444 A GB596444 A GB 596444A GB 5242/45 A GB5242/45 A GB 5242/45A GB 524245 A GB524245 A GB 524245A GB 596444 A GB596444 A GB 596444A
Authority
GB
United Kingdom
Prior art keywords
key
relay
line
operates
spring
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
GB5242/45A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB596444A publication Critical patent/GB596444A/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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/924—Coupled nut and bolt
    • Y10S411/929—Thread lock
    • Y10S411/937—Distorted nut

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Push-Button Switches (AREA)
GB5242/45A 1944-04-21 1945-03-02 Telecommunication switching systems Expired GB596444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US532143A US2410050A (en) 1944-04-21 1944-04-21 Telecommunication switching system

Publications (1)

Publication Number Publication Date
GB596444A true GB596444A (en) 1948-01-05

Family

ID=27789262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5242/45A Expired GB596444A (en) 1944-04-21 1945-03-02 Telecommunication switching systems

Country Status (3)

Country Link
US (1) US2410050A (cs)
BE (1) BE466588A (cs)
GB (1) GB596444A (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005055A (en) * 1957-10-08 1961-10-17 Bell Telephone Labor Inc Tilting dial circuit selector
DE1258915B (de) * 1964-11-18 1968-01-18 Siemens Ag Schaltungsanordnung zur UEbertragung von Stromstossreihen in Fernmelde-, insbesondere Fernsprechanlagen
US3441679A (en) * 1965-09-22 1969-04-29 Bell Telephone Labor Inc Potential sensing pbx class-of-service selector circuit

Also Published As

Publication number Publication date
US2410050A (en) 1946-10-29
BE466588A (cs)

Similar Documents

Publication Publication Date Title
GB596444A (en) Telecommunication switching systems
GB968538A (en) Push button type telephone calling device
US2347108A (en) Call transmitter for telephone signaling systems
US2375109A (en) Telephone call transmitter
GB829348A (en) Improvements in or relating to substitution arrangements for stand-by equipment in signal transmission systems
GB938614A (en) Improvements in or relating to telephone call devices
US2411526A (en) Impulse storing and repeating device
GB608857A (en) Device for switching-in and disconnecting signal apparatus
US2393354A (en) Telephone system
US1136838A (en) Selective call device.
GB696588A (en) Improvements in or relating to dial switches for use with coin-box telephone instruments
JPS5621494A (en) Dial pulse control system
US1262639A (en) Telephone-exchange.
GB837137A (en) Improvements in or relating to dial switches for use in telephone systems
GB717247A (en) Improvements in telephone coin collectors
GB889542A (en) Improvements in or relating to telephone dials and to telephone subscribers apparatus incorporating telephone dials
GB494582A (en) Improvements in or relating to telegraph switching systems
GB554772A (en) Improvements in or connected with telephone systems
GB880621A (en) Improvements in and relating to electrical circuit-breakers
GB915475A (en) Push buttons
GB846708A (en) Improvements in impulse sender mechanisms of automatic telephone dials
GB556041A (en) Improvements in electrical remote control systems
GB845614A (en) Improvements in or relating to dial switches for use with party-line telephone instruments
GB451864A (en) Improvements in telephone or like systems and impulse senders for use therein
GB809512A (en) Improvements in or relating to multi-contact, impulse driven, selector switch