GB494235A - Improvements in electrical signalling or control systems - Google Patents

Improvements in electrical signalling or control systems

Info

Publication number
GB494235A
GB494235A GB1144537A GB1144537A GB494235A GB 494235 A GB494235 A GB 494235A GB 1144537 A GB1144537 A GB 1144537A GB 1144537 A GB1144537 A GB 1144537A GB 494235 A GB494235 A GB 494235A
Authority
GB
United Kingdom
Prior art keywords
control systems
electrical signalling
signalling
electromagnetic
electrical
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
GB1144537A
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 Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB1144537A priority Critical patent/GB494235A/en
Publication of GB494235A publication Critical patent/GB494235A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/30—Electric signal transmission systems in which transmission is by selection of one or more conductors or channels from a plurality of conductors or channels

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

494,235. Electromagnetic interrupters. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and HARRISON, W. A. April 21, 1937, No. 11445. [Class 38 (v)] [Also in Groups XXXIX and XXXVIII] Self-interrupting contacts of an electromagnetic device for signalling or control purposes are shunted by a rectifier so that their opening is effective or not according to the direction of the operating current.
GB1144537A 1937-04-21 1937-04-21 Improvements in electrical signalling or control systems Expired GB494235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1144537A GB494235A (en) 1937-04-21 1937-04-21 Improvements in electrical signalling or control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1144537A GB494235A (en) 1937-04-21 1937-04-21 Improvements in electrical signalling or control systems

Publications (1)

Publication Number Publication Date
GB494235A true GB494235A (en) 1938-10-21

Family

ID=9986391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1144537A Expired GB494235A (en) 1937-04-21 1937-04-21 Improvements in electrical signalling or control systems

Country Status (1)

Country Link
GB (1) GB494235A (en)

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