GB1448044A - Electric lamp failure indicators - Google Patents
Electric lamp failure indicatorsInfo
- Publication number
- GB1448044A GB1448044A GB2649874A GB2649874A GB1448044A GB 1448044 A GB1448044 A GB 1448044A GB 2649874 A GB2649874 A GB 2649874A GB 2649874 A GB2649874 A GB 2649874A GB 1448044 A GB1448044 A GB 1448044A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- winding
- amplitude
- failure
- induced
- 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
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)
Abstract
1448044 Lamp failure alarms WELWYN ELECTRIC Ltd 14 June 1974 26498/74 Heading G4N An alarm device for detecting the failure of a lamp 5 in its energized or un-energized state comprises a magnetic former 1, a first winding 2 in circuit with the lamp 5, a second winding 3 supplying current pulses and a third winding 4 for detecting the amplitude of a voltage or current induced in it as a result of a change in amplitude of the flux density caused by the lamp failure. In the un-energized state of the lamp, pulses are induced in the loop including winding 2, lamp 5 and a capacitor 27. With a faulty lamp, the amplitude of variations sensed by the winding 4 is large as either the former 1 is no longer magnetically saturated or that the pulses provided by winding 3 are no longer opposed by those induced in 2 and this change is sensed by a pulse amplitude discriminator 9 for activating a warning lamp or a buzzer 10. As an alternative to using two formers for a pair of lamps, in the embodiment of Fig. 3 (not shown), the lamps are connected to a pair of windings having a common connection connected to the energizing source.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2649874A GB1448044A (en) | 1974-06-14 | 1974-06-14 | Electric lamp failure indicators |
FR7518534A FR2274981A1 (en) | 1974-06-14 | 1975-06-13 | ELECTRIC LAMP FAILURE INDICATOR |
DE19752526401 DE2526401A1 (en) | 1974-06-14 | 1975-06-13 | DEVICE FOR INDICATING THE FAILURE OF AN ELECTRIC LAMP |
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 |
---|---|
GB1448044A true GB1448044A (en) | 1976-09-02 |
Family
ID=10244609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2649874A Expired GB1448044A (en) | 1974-06-14 | 1974-06-14 | Electric lamp failure indicators |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2526401A1 (en) |
FR (1) | FR2274981A1 (en) |
GB (1) | GB1448044A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4642616A (en) * | 1985-02-14 | 1987-02-10 | Prime Computer, Inc. | Method and apparatus for detection of AC power failure conditions |
BE902709A (en) * | 1985-06-20 | 1985-12-20 | Backer Adrien Sa | METHOD AND DEVICE FOR MONITORING LIGHT BEACONS. |
EP0254804A3 (en) * | 1986-08-01 | 1989-07-19 | Tideland Signal Corporation | Electrical continuity sensing circuit |
Family Cites Families (2)
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 |
DE2235642A1 (en) * | 1972-07-20 | 1974-01-31 | Bosch Gmbh Robert | DEVICE FOR CONTROLLING ELECTRICAL CONSUMERS IN MOTOR VEHICLES |
-
1974
- 1974-06-14 GB GB2649874A patent/GB1448044A/en not_active Expired
-
1975
- 1975-06-13 FR FR7518534A patent/FR2274981A1/en not_active Withdrawn
- 1975-06-13 DE DE19752526401 patent/DE2526401A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
FR2274981A1 (en) | 1976-01-09 |
DE2526401A1 (en) | 1976-01-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |