GB543718A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB543718A
GB543718A GB15548/40A GB1554840A GB543718A GB 543718 A GB543718 A GB 543718A GB 15548/40 A GB15548/40 A GB 15548/40A GB 1554840 A GB1554840 A GB 1554840A GB 543718 A GB543718 A GB 543718A
Authority
GB
United Kingdom
Prior art keywords
contacts
rotary
magnet
release
selector
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
GB15548/40A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products 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
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB543718A publication Critical patent/GB543718A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/14—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
    • H01H67/16—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Interface Circuits In Exchanges (AREA)
GB15548/40A 1939-11-02 1940-10-22 Improvements in or relating to telephone systems Expired GB543718A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US302521A US2237419A (en) 1939-11-02 1939-11-02 Telephone system

Publications (1)

Publication Number Publication Date
GB543718A true GB543718A (en) 1942-03-10

Family

ID=23168093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15548/40A Expired GB543718A (en) 1939-11-02 1940-10-22 Improvements in or relating to telephone systems

Country Status (4)

Country Link
US (1) US2237419A (enrdf_load_stackoverflow)
FR (1) FR869078A (enrdf_load_stackoverflow)
GB (1) GB543718A (enrdf_load_stackoverflow)
NL (1) NL69630C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL69630C (enrdf_load_stackoverflow)
US2237419A (en) 1941-04-08
FR869078A (fr) 1942-01-23

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