GB971231A - Position change monitor - Google Patents

Position change monitor

Info

Publication number
GB971231A
GB971231A GB2653762A GB2653762A GB971231A GB 971231 A GB971231 A GB 971231A GB 2653762 A GB2653762 A GB 2653762A GB 2653762 A GB2653762 A GB 2653762A GB 971231 A GB971231 A GB 971231A
Authority
GB
United Kingdom
Prior art keywords
july
transformer
switch
position change
change monitor
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
GB2653762A
Inventor
Hugh Jennings Ward
Assis-Fonse Harold Mountjoy D
Ian Joseph Hampson
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2653762A priority Critical patent/GB971231A/en
Publication of GB971231A publication Critical patent/GB971231A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Alarm Systems (AREA)

Abstract

971, 231. Electric selective signalling systems. STANDARD TELEPHONES & CABLES Ltd, July 8,1963 [July 10,1962], No. 26537/62. Heading G4H. To detect when a change in the setting of any one of a number of switches occurs each switch 6, Fig. 1, is provided with extra contacts connected as shown to primary windings W1,W2 of a transformer T so that whenever a change occurs a pulse is produced in an output winding W of the transformer. This may sound an alarm or cause known devices to hunt for the switch that has changed.
GB2653762A 1962-07-10 1962-07-10 Position change monitor Expired GB971231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2653762A GB971231A (en) 1962-07-10 1962-07-10 Position change monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2653762A GB971231A (en) 1962-07-10 1962-07-10 Position change monitor

Publications (1)

Publication Number Publication Date
GB971231A true GB971231A (en) 1964-09-30

Family

ID=30471377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2653762A Expired GB971231A (en) 1962-07-10 1962-07-10 Position change monitor

Country Status (1)

Country Link
GB (1) GB971231A (en)

Similar Documents

Publication Publication Date Title
GB971231A (en) Position change monitor
CA699638A (en) Electrical switch
CA661063A (en) Compound electrical switch
CA682798A (en) Interrupter circuit for telephone systems
CA671428A (en) Impact-operable electric alarm switch devices
CA661107A (en) Circuit arrangement for silent switching on of a television receiver
GB1045203A (en) Electric changeover circuit arrangement
CA679113A (en) Alternating current circuit interrupter
CA692063A (en) Conference circuit for telephone switching systems
AU271918B2 (en) Telegraph switching system
CA606925A (en) Electrical signalling systems
CA608509A (en) Telephone emergency reporting alarm system
CA600118A (en) Electric signal communication systems
CA644652A (en) Snap action electrical switch
AU402916B2 (en) Electrical switch
CA694689A (en) Electrical switch
CA684217A (en) High current switch arrangement for quick break
AU402477B2 (en) Electrical relay switch
CA648266A (en) Current limiting circuit breaker
CA652967A (en) Current limiting circuit breaker
CA686869A (en) Telephone switching circuit
CA650455A (en) Electrical switching circuit
CA646812A (en) Electrical switching circuit
CA687908A (en) Telephone switching system
AU288991B2 (en) Telephone switching system