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GB505192A - Improvements in and relating to telephone installations - Google Patents

Improvements in and relating to telephone installations

Info

Publication number
GB505192A
GB505192A GB30406/37A GB3040637A GB505192A GB 505192 A GB505192 A GB 505192A GB 30406/37 A GB30406/37 A GB 30406/37A GB 3040637 A GB3040637 A GB 3040637A GB 505192 A GB505192 A GB 505192A
Authority
GB
United Kingdom
Prior art keywords
switch
loud
hook
speaker set
handset
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
GB30406/37A
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.)
Autophon AG
Original Assignee
Autophon AG
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 Autophon AG filed Critical Autophon AG
Publication of GB505192A publication Critical patent/GB505192A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

505,192. Exchange and intercommunication systems and sets. AUTOPHON AKT.-GES. Nov. 5, 1937, No. 30406. Convention.date, Nov. 5, 1936. [Class 40 (iv)] In a system of the kind in which selecting keys are locked under control of the switch hook or cradle, means are provided for using a loud-speaker set as an alternative to the handset, the switching on of the loud-speaker set causing the operation of the hook or cradle or of a separate key-latching device either by means of a mechanical connection with the switch, Fig. 3 (not shown), or by means of an electromagnet controlled by the switch, Fig. 4 (not shown). As shown, the instruments are common to an intercommunication system and an automatic exchange. When it is desired to use the loud-speaker set, a switch (not shown) is actuated to operate magnet KM, which holds or actuates the hook-switch independently of the handset, and relay U which effects the necessary circuit changes. The arrangement may be employed with the system described in Specification 342,726. Specifications 343,625 and 453,459 also are referred to.
GB30406/37A 1936-11-05 1937-11-05 Improvements in and relating to telephone installations Expired GB505192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH505192X 1936-11-05

Publications (1)

Publication Number Publication Date
GB505192A true GB505192A (en) 1939-05-05

Family

ID=4517093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30406/37A Expired GB505192A (en) 1936-11-05 1937-11-05 Improvements in and relating to telephone installations

Country Status (1)

Country Link
GB (1) GB505192A (en)

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