GB1087478A - Control device for signal lamps - Google Patents

Control device for signal lamps

Info

Publication number
GB1087478A
GB1087478A GB4943965A GB4943965A GB1087478A GB 1087478 A GB1087478 A GB 1087478A GB 4943965 A GB4943965 A GB 4943965A GB 4943965 A GB4943965 A GB 4943965A GB 1087478 A GB1087478 A GB 1087478A
Authority
GB
United Kingdom
Prior art keywords
transistor
failure
signal
baumgartner
franz
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
GB4943965A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1087478A publication Critical patent/GB1087478A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1,087,478. Lamp failure alarms; fault responsive means. FRANZ BAUMGARTNER, [trading as FRANZ BAUMGARTNER FABRIK ELEKTRISCHER APPARATE]. Nov. 22, 1965 [Nov. 21, 1964], No. 49439/65. Headings G4N and G4Q. [Also in Division H3] Failure of a signal lamp circuit connected in series with the primary of a ferrite core transformer changes the current in the secondary to actuate a switching device. Red traffic lights 1 . . . 6 and pedestrian lights a, b for a NS direction are coupled via ferrite core transformers m 1 , m 2 and rectifiers D 1 , D 2 to OR gates D 5 , D 6 . Under normal conditions the outputs from the two transformers are rectified to produce a D.C. signal to reverse bias diodes D 5 , D 6 , so that transistor T 1 is conductive. Failure of any one of the lamps results in a change in the secondary current of m 1 or m 2 sufficient to forward bias D 5 or D 6 and cut-off transistor T 1 . A similar arrangement for the EW direction is coupled to transistor T 2 , so that an output signal is only produced when both transistors are cut-off, i.e. when a light in both directions fails at the same time. If green lights show in both NS and EW directions at the same time, this will also mean that no red lamps are lit, and the output signal (which can be used, for example, to flash an amber) will again be produced.
GB4943965A 1964-11-21 1965-11-22 Control device for signal lamps Expired GB1087478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0079448 1964-11-21

Publications (1)

Publication Number Publication Date
GB1087478A true GB1087478A (en) 1967-10-18

Family

ID=6980306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4943965A Expired GB1087478A (en) 1964-11-21 1965-11-22 Control device for signal lamps

Country Status (3)

Country Link
DE (1) DE1303440B (en)
GB (1) GB1087478A (en)
IL (1) IL24602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135540A (en) * 1983-02-17 1984-08-30 Pa Consulting Services Lamp failure alarm
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756493C2 (en) * 1977-12-19 1987-03-19 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for signal protection in traffic light systems
DE3428444A1 (en) * 1984-08-01 1986-02-06 Siemens AG, 1000 Berlin und 8000 München MONITORING DEVICE FOR TRAFFIC SIGNALING SYSTEMS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135540A (en) * 1983-02-17 1984-08-30 Pa Consulting Services Lamp failure alarm
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus
US4661717A (en) * 1984-11-19 1987-04-28 Nissan Motor Co., Ltd. Load condition determining apparatus

Also Published As

Publication number Publication date
IL24602A (en) 1969-06-25
DE1303440B (en) 1971-12-02

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