FR631166A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR631166A
FR631166A FR631166DA FR631166A FR 631166 A FR631166 A FR 631166A FR 631166D A FR631166D A FR 631166DA FR 631166 A FR631166 A FR 631166A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR631166A publication Critical patent/FR631166A/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)
FR631166D 1926-07-06 1927-03-19 Improvements to telephone systems Expired FR631166A (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
FR631166A true FR631166A (en) 1927-12-15

Family

ID=26818483

Family Applications (1)

Application Number Title Priority Date Filing Date
FR631166D Expired FR631166A (en) 1926-07-06 1927-03-19 Improvements to telephone systems

Country Status (4)

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

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
GB274033A (en) 1928-06-12
DE608284C (en) 1935-01-21
US1767862A (en) 1930-06-24

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