GB386381A - Improvements relating to automatic telephone systems - Google Patents

Improvements relating to automatic telephone systems

Info

Publication number
GB386381A
GB386381A GB2911831A GB2911831A GB386381A GB 386381 A GB386381 A GB 386381A GB 2911831 A GB2911831 A GB 2911831A GB 2911831 A GB2911831 A GB 2911831A GB 386381 A GB386381 A GB 386381A
Authority
GB
United Kingdom
Prior art keywords
group
marking
relay
busy signal
bank
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
GB2911831A
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Priority to GB2911831A priority Critical patent/GB386381A/en
Publication of GB386381A publication Critical patent/GB386381A/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)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

386,381. Automatic exchange systems. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, PATTERSON, W. G., 68, Eltham Road, Lee, both in London, and LONG, D: P., 3; Ingleby Way, Chislehurst, Kent. Oct. 20, 1931, No. 29118. Drawings to Specification. [Class 40 (iv).] A single-motion selector which. has doubleended wipers the ends of which,come into engagement with corresponding rows of terminals in turn and which is controlled numerically by marking, in the event of an unsuccessful search in the wanted group, rotates to its last position in which a relay is operated to give a busy signal, and the group overflow meter is actuated over a bank of the marking switch. In the case of a " dead " group however, a second relay is operated over the marking switch bank to substitute NU tone for the busy signal. The selector described is identical with the pre-final selector described in Specifications 378,585'(Figs. 9 and 10) and 378,586.
GB2911831A 1931-10-20 1931-10-20 Improvements relating to automatic telephone systems Expired GB386381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2911831A GB386381A (en) 1931-10-20 1931-10-20 Improvements relating to automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2911831A GB386381A (en) 1931-10-20 1931-10-20 Improvements relating to automatic telephone systems

Publications (1)

Publication Number Publication Date
GB386381A true GB386381A (en) 1933-01-19

Family

ID=10286439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2911831A Expired GB386381A (en) 1931-10-20 1931-10-20 Improvements relating to automatic telephone systems

Country Status (1)

Country Link
GB (1) GB386381A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525417A (en) * 1947-01-02 1950-10-10 Automatic Elect Lab Selector switch metering circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525417A (en) * 1947-01-02 1950-10-10 Automatic Elect Lab Selector switch metering circuit

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