GB376226A - Improvements relating to telephone installations - Google Patents

Improvements relating to telephone installations

Info

Publication number
GB376226A
GB376226A GB39108/30A GB3910830A GB376226A GB 376226 A GB376226 A GB 376226A GB 39108/30 A GB39108/30 A GB 39108/30A GB 3910830 A GB3910830 A GB 3910830A GB 376226 A GB376226 A GB 376226A
Authority
GB
United Kingdom
Prior art keywords
relay
circuit
buzzer
reply
extension
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
GB39108/30A
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.)
Fuld & Co Telephon
Original Assignee
Fuld & Co Telephon
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 Fuld & Co Telephon filed Critical Fuld & Co Telephon
Publication of GB376226A publication Critical patent/GB376226A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/022—Paging systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/006—Call diverting means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

376,226. Substation circuits. FULD & CO. TELEPHONUND TELEGRAPHENWERKE AKT.-GES., H., 136, Mainzer Landstrasse, Frankfort-on-Main, Germany. Dec. 29, 1930, No. 39108. Convention date, Jan. 8. Void [Published under Sect. 91 of the Acts]. [Class 40 (iv).] At a substation provided with extension apparatus, if a call is not answered within a predetermined time, i is automatically connected through to the extension apparatus. Ringing current controls a buzzer KW through relay AR, and at the first pulse, relay HR energizes, locks, lights lamp AL and closes a circuit for a thermal relay Th, which pulls up after 30 seconds provided relay AU does not operate due to the reply of the called subscriber. Relay Th connects up relay UR which extends the ringing circuit to a buzzer at the extension. apparatus AN and closes a circuit for a second thermal relay Thl. The latter pulls up after a further 30 second.s if there is still no reply and releases relays Th, HR, UR, and the sequence of operations is repeated.
GB39108/30A 1930-01-08 1930-12-29 Improvements relating to telephone installations Expired GB376226A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE376226X 1930-01-08

Publications (1)

Publication Number Publication Date
GB376226A true GB376226A (en) 1932-07-07

Family

ID=6344218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39108/30A Expired GB376226A (en) 1930-01-08 1930-12-29 Improvements relating to telephone installations

Country Status (2)

Country Link
FR (1) FR708970A (en)
GB (1) GB376226A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767836C (en) * 1934-10-23 1953-11-23 Mix & Genest Ag Circuit arrangement for telephone extension systems with dialer operation
DE762166C (en) * 1937-06-22 1953-03-09 Normalzeit G M B H Circuit arrangement for telephone systems
FR2753029B1 (en) * 1996-08-28 2000-08-11 Antoine Philipion AUTOMATIC CALL FORWARDING DEVICE FOR TELEPHONE SET

Also Published As

Publication number Publication date
FR708970A (en) 1931-08-01

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