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GB274033A - Improvements in and relating to telephone systems - Google Patents

Improvements in and relating to telephone systems

Info

Publication number
GB274033A
GB274033A GB6992/27A GB699227A GB274033A GB 274033 A GB274033 A GB 274033A GB 6992/27 A GB6992/27 A GB 6992/27A GB 699227 A GB699227 A GB 699227A GB 274033 A GB274033 A GB 274033A
Authority
GB
United Kingdom
Prior art keywords
relay
wiper
wipers
finder
line
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
GB6992/27A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 claimed from US120547A external-priority patent/US1767861A/en
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB274033A publication Critical patent/GB274033A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • 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
    • H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
    • H01H67/06—Rotary switches, i.e. having angularly movable wipers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB6992/27A 1926-07-06 1927-03-12 Improvements in and relating to telephone systems Expired GB274033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US120547A US1767861A (en) 1926-07-06 1926-07-06 Telephone system
US229018A US1767862A (en) 1926-07-06 1927-10-27 Telephone system

Publications (1)

Publication Number Publication Date
GB274033A true GB274033A (en) 1928-06-12

Family

ID=26818483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6992/27A Expired GB274033A (en) 1926-07-06 1927-03-12 Improvements in and relating to telephone systems

Country Status (4)

Country Link
US (1) US1767862A (fr)
DE (1) DE608284C (fr)
FR (1) FR631166A (fr)
GB (1) GB274033A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535771A (en) * 1946-05-15 1950-12-26 Automatic Telephone & Elect Contact spring operation and drive in automatic switch
US2852615A (en) * 1954-11-03 1958-09-16 Gen Telephone Lab Inc Two-digit rotary switch
GB1475878A (en) * 1973-11-02 1977-06-10 Coal Ind Sequence control circuit

Also Published As

Publication number Publication date
DE608284C (de) 1935-01-21
US1767862A (en) 1930-06-24
FR631166A (fr) 1927-12-15

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