GB1353685A - Supervisory circuits - Google Patents

Supervisory circuits

Info

Publication number
GB1353685A
GB1353685A GB1723971A GB1723971A GB1353685A GB 1353685 A GB1353685 A GB 1353685A GB 1723971 A GB1723971 A GB 1723971A GB 1723971 A GB1723971 A GB 1723971A GB 1353685 A GB1353685 A GB 1353685A
Authority
GB
United Kingdom
Prior art keywords
amplifier
resistor
contacts
load
voltage
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
GB1723971A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1353685A publication Critical patent/GB1353685A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/09—Circuit arrangements or apparatus for operating incandescent light sources in which the lamp is fed by pulses
    • 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
    • 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
    • B60Q11/007—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 the lighting devices indicating change of drive direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1353685 Lamp failure alarms PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 26 May 1971 [29 May 1970] 17239/71 Heading G4N In a circuit for supervising a load (such as the flashing lamps 1 of a motor vehicle) which is fed with direct current, interrupted by contacts 3, the contacts are bridged by the series arrangement of a capacitor 6 and resistor 5, the voltage across resistor 5 being supplied to a transistor amplifier 13 arranged to provide a signal in the event of a fault in load 1. At the onset of each break of contacts 3, the voltage across resistor 5 reaches a maximum as capacitor 6 begins to charge, the maximum value being a function of the potential division between the resistor 5 and the resistance of the load 1. Under normal conditions, the differential amplifier 13 will produce an output such as to maintain the control circuit 7 for the flashing relay 9 at ninety times per minute but if one of lamps 1 should fail, the amplifier 13 produces no output so that the flashing rate is doubled. Alternatively, a pilot lamp may be connected in series with the collector of one of the transistors of amplifier 13. Diodes and transistors may be connected across resistors 11 and/or 12 to compensate for changes in voltage of battery U. In Fig. 1 (not shown) amplifier 13 is formed by a single transistor, components 14, 19, 21 being omitted.
GB1723971A 1970-05-29 1971-05-26 Supervisory circuits Expired GB1353685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702026315 DE2026315B2 (en) 1970-05-29 1970-05-29 MONITORING CIRCUIT

Publications (1)

Publication Number Publication Date
GB1353685A true GB1353685A (en) 1974-05-22

Family

ID=5772455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1723971A Expired GB1353685A (en) 1970-05-29 1971-05-26 Supervisory circuits

Country Status (4)

Country Link
DE (1) DE2026315B2 (en)
FR (1) FR2090372B1 (en)
GB (1) GB1353685A (en)
NL (1) NL7107096A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552304A (en) * 2019-10-10 2019-12-10 徐州徐工环境技术有限公司 road sweeping vehicle line safety arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2424582A1 (en) * 1978-04-28 1979-11-23 Radiotechnique Compelec Frequency changer for periodically switched power supply - has capacitor voltage of multivibrator changing when load impedance varies
FR2458199A1 (en) * 1979-06-01 1980-12-26 Compteurs E D Detector for faulty lamp in motor vehicle - is operated by comparator circuits from lamp current flow in resistor
DE3112038C2 (en) * 1980-03-27 1986-07-03 Nippondenso Co., Ltd., Kariya, Aichi Direction indicator flasher for two-wheeled vehicles
JPH049228Y2 (en) * 1985-06-04 1992-03-09

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1052710A (en) * 1965-08-13 1966-12-30 Standard Teleph And Cabl Ltd Electrical switching arrangement
FR1452310A (en) * 1965-10-09 1966-02-25 Bosch Gmbh Robert Flashing light signaling installation
US3445810A (en) * 1966-05-27 1969-05-20 Daniel J Donohoo Alerting apparatus
DE1917985A1 (en) * 1969-04-09 1971-01-07 Philips Patentverwaltung Circuit arrangement for monitoring DC-fed consumers that can be periodically switched on and off

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552304A (en) * 2019-10-10 2019-12-10 徐州徐工环境技术有限公司 road sweeping vehicle line safety arrangement

Also Published As

Publication number Publication date
NL7107096A (en) 1971-12-01
FR2090372B1 (en) 1975-08-22
DE2026315B2 (en) 1972-04-06
DE2026315A1 (en) 1971-12-09
FR2090372A1 (en) 1972-01-14

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees