GB246775A - Improvements in or relating to automatic and semi-automatic telephone systems - Google Patents

Improvements in or relating to automatic and semi-automatic telephone systems

Info

Publication number
GB246775A
GB246775A GB3142525A GB3142525A GB246775A GB 246775 A GB246775 A GB 246775A GB 3142525 A GB3142525 A GB 3142525A GB 3142525 A GB3142525 A GB 3142525A GB 246775 A GB246775 A GB 246775A
Authority
GB
United Kingdom
Prior art keywords
exchanges
automatic
switch
condensers
dialling
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
GB3142525A
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.)
Automatic Electric Co
Original Assignee
Automatic Electric 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
Application filed by Automatic Electric Co filed Critical Automatic Electric Co
Priority to GB3142525A priority Critical patent/GB246775A/en
Publication of GB246775A publication Critical patent/GB246775A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)

Abstract

246,775. Automatic Telephone Manufacturing Co., Ltd., (Automatic Electric Co.). Oct. 23, 1924. Drawings to Specification. Automatic and semi-automatic exchange systems; metering; party-line systems.-The system described is identical with that described in Specifications 246,550, but the claims relate to the following features: (1) The connections of the talking condensers at an impulse repeating switch are modified during dialling to improve the impulsing conditions. This is effected by a relay which is energized prior to the transmission of impulses and maintained energized until the completion of impulsing, and which disconnects the condensers from the outgoing speaking leads. One of the condensers may be connected across the line relay during dialling. This feature is also applied to switches which feed battery and earth forward during dialling. (2) The first numerical switch of a system is provided with attendants' supervisory lamps, the circuits of which are altered when the switch is taken into use, during dialling, when the called party hangs up, and when the calling party hangs up. (3) In a system including exchanges in which talking battery to the called party is supplied from the first local switch and exchanges in which feed current is supplied from the connector, metering and supervisory circuits at the first switches of exchanges of the first kind are connected up on the completion of dialling when calls are made to exchanges of the same kind, and on the reply of the called party when calls are made to exchanges of the second kind. Specification 226,154 also is referred to.
GB3142525A 1924-10-23 1924-10-23 Improvements in or relating to automatic and semi-automatic telephone systems Expired GB246775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3142525A GB246775A (en) 1924-10-23 1924-10-23 Improvements in or relating to automatic and semi-automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3142525A GB246775A (en) 1924-10-23 1924-10-23 Improvements in or relating to automatic and semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB246775A true GB246775A (en) 1926-01-25

Family

ID=10322902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3142525A Expired GB246775A (en) 1924-10-23 1924-10-23 Improvements in or relating to automatic and semi-automatic telephone systems

Country Status (1)

Country Link
GB (1) GB246775A (en)

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