FR2274981A1 - ELECTRIC LAMP FAILURE INDICATOR - Google Patents

ELECTRIC LAMP FAILURE INDICATOR

Info

Publication number
FR2274981A1
FR2274981A1 FR7518534A FR7518534A FR2274981A1 FR 2274981 A1 FR2274981 A1 FR 2274981A1 FR 7518534 A FR7518534 A FR 7518534A FR 7518534 A FR7518534 A FR 7518534A FR 2274981 A1 FR2274981 A1 FR 2274981A1
Authority
FR
France
Prior art keywords
electric lamp
failure indicator
lamp failure
indicator
electric
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.)
Withdrawn
Application number
FR7518534A
Other languages
French (fr)
Inventor
George France
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.)
Welwyn Electric Ltd
Original Assignee
Welwyn Electric 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 Welwyn Electric Ltd filed Critical Welwyn Electric Ltd
Publication of FR2274981A1 publication Critical patent/FR2274981A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
FR7518534A 1974-06-14 1975-06-13 ELECTRIC LAMP FAILURE INDICATOR Withdrawn FR2274981A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2649874A GB1448044A (en) 1974-06-14 1974-06-14 Electric lamp failure indicators

Publications (1)

Publication Number Publication Date
FR2274981A1 true FR2274981A1 (en) 1976-01-09

Family

ID=10244609

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7518534A Withdrawn FR2274981A1 (en) 1974-06-14 1975-06-13 ELECTRIC LAMP FAILURE INDICATOR

Country Status (3)

Country Link
DE (1) DE2526401A1 (en)
FR (1) FR2274981A1 (en)
GB (1) GB1448044A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194755A1 (en) * 1985-02-14 1986-09-17 Prime Computer, Inc. Method and apparatus for detection of AC power failure conditions
EP0207922A1 (en) * 1985-06-20 1987-01-07 Siemens Aktiengesellschaft Process and apparatus for the surveillance of beacon lights

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254804A3 (en) * 1986-08-01 1989-07-19 Tideland Signal Corporation Electrical continuity sensing circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2115662A1 (en) * 1970-04-02 1971-10-21 Luebeck S Device for discovering and displaying faults in an electrical direct current system of a vehicle
FR2193980A1 (en) * 1972-07-20 1974-02-22 Bosch Gmbh Robert

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2115662A1 (en) * 1970-04-02 1971-10-21 Luebeck S Device for discovering and displaying faults in an electrical direct current system of a vehicle
FR2193980A1 (en) * 1972-07-20 1974-02-22 Bosch Gmbh Robert

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194755A1 (en) * 1985-02-14 1986-09-17 Prime Computer, Inc. Method and apparatus for detection of AC power failure conditions
US4642616A (en) * 1985-02-14 1987-02-10 Prime Computer, Inc. Method and apparatus for detection of AC power failure conditions
EP0207922A1 (en) * 1985-06-20 1987-01-07 Siemens Aktiengesellschaft Process and apparatus for the surveillance of beacon lights

Also Published As

Publication number Publication date
GB1448044A (en) 1976-09-02
DE2526401A1 (en) 1976-01-02

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Legal Events

Date Code Title Description
ST Notification of lapse