GB120376A - Improvements in or relating to Electrical Relays. - Google Patents

Improvements in or relating to Electrical Relays.

Info

Publication number
GB120376A
GB120376A GB13767/18A GB1376718A GB120376A GB 120376 A GB120376 A GB 120376A GB 13767/18 A GB13767/18 A GB 13767/18A GB 1376718 A GB1376718 A GB 1376718A GB 120376 A GB120376 A GB 120376A
Authority
GB
United Kingdom
Prior art keywords
relating
electrical relays
relays
electrical
harlow
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
GB13767/18A
Inventor
Clarence Burr Harlow
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB120376A publication Critical patent/GB120376A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

120,376. Harlow, C. B. Aug. 28, 1917. [Convention date]. Telephone systems.- A high-power calling device S is connected across high pressure mains Q by means of a relay R energized by the calling current.
GB13767/18A 1917-08-28 1918-08-23 Improvements in or relating to Electrical Relays. Expired GB120376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US120376XA 1917-08-28 1917-08-28

Publications (1)

Publication Number Publication Date
GB120376A true GB120376A (en) 1919-07-03

Family

ID=32391522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13767/18A Expired GB120376A (en) 1917-08-28 1918-08-23 Improvements in or relating to Electrical Relays.

Country Status (1)

Country Link
GB (1) GB120376A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787739A (en) * 1952-08-02 1957-04-02 Milwaukee Gas Specialty Co Electromagnetically operated control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787739A (en) * 1952-08-02 1957-04-02 Milwaukee Gas Specialty Co Electromagnetically operated control device

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