GB389232A - Improvements relating to automatic telephone systems - Google Patents

Improvements relating to automatic telephone systems

Info

Publication number
GB389232A
GB389232A GB172432A GB172432A GB389232A GB 389232 A GB389232 A GB 389232A GB 172432 A GB172432 A GB 172432A GB 172432 A GB172432 A GB 172432A GB 389232 A GB389232 A GB 389232A
Authority
GB
United Kingdom
Prior art keywords
selector
wipers
controlled
group
relay
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
GB172432A
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 GB172432A priority Critical patent/GB389232A/en
Publication of GB389232A publication Critical patent/GB389232A/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)
  • Toys (AREA)
  • Structure Of Telephone Exchanges (AREA)

Abstract

389,232. Automatic exchange systems. SIEMENS BROS. & CO., Ltd.,. Caxton House, Tothill Street, PATTERSON, W. G., 68, Eltham Road, both in London, and LONG, D. P., 3, Ingleby Way, Chislehurst, Kent. Jan. 20, 1932, No. 1724. Drawings to Specification. [Class 40 (iv).] A single-motion' group selector which has double-ended wipers the ends of which come into engagement with corresponding rows of terminals in turn is controlled numerically over a single bank of a marking switch which, dependent on a discriminating relay controlled from the preceding selecting stage, moves one or two steps for the first impulse to select a main group corresponding to the ends of the wipers to be used and thereafter advances two steps per impulse to positions corresponding to the groups of outlets in the selected main group. The discriminating relay may be controlled by a signal over the line circuit when the selector is seized, or it may be included in one of two routes of access to the selector. A preliminary rotation of the selector wipers through 180‹ takes place when necessary under the control of this relay. The scheme may be extended for the control of a selector in which it is necessary to make a preliminary selection from more than two main groups. A group selector with a common control circuit is described which is identical with that described in Specifications 378,585, (Figs. 9 and 10), and 378,586. Specification 388,173 is referred to.
GB172432A 1932-01-20 1932-01-20 Improvements relating to automatic telephone systems Expired GB389232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB172432A GB389232A (en) 1932-01-20 1932-01-20 Improvements relating to automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB172432A GB389232A (en) 1932-01-20 1932-01-20 Improvements relating to automatic telephone systems

Publications (1)

Publication Number Publication Date
GB389232A true GB389232A (en) 1933-03-16

Family

ID=9726894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB172432A Expired GB389232A (en) 1932-01-20 1932-01-20 Improvements relating to automatic telephone systems

Country Status (1)

Country Link
GB (1) GB389232A (en)

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