GB1238829A - - Google Patents

Info

Publication number
GB1238829A
GB1238829A GB1238829DA GB1238829A GB 1238829 A GB1238829 A GB 1238829A GB 1238829D A GB1238829D A GB 1238829DA GB 1238829 A GB1238829 A GB 1238829A
Authority
GB
United Kingdom
Prior art keywords
switch
transistor
collector
resistor
multivibrator
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
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1238829A publication Critical patent/GB1238829A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
    • B60Q1/38—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps
    • B60Q1/385—Electronic temporisation with relay amplification

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Audible And Visible Signals (AREA)

Abstract

1,238,829. Road traffic signals on vehicles; lamp failure indicators. ROBERT BOSCH G.m.b.H. 19 June, 1970 [20 June, 1969], No. 29814/70. Headings G4F and G4N. [Also in Division H3] A flasher unit for vehicle direction indicator lamps 24, 25 and 26, 27 comprises an astable multivibrator having two emitter-coupled transistors 10, 11, the operating frequency of the multivibrator varying in accordance with the potential applied to the collector of the transistor 10. This potential is made to depend upon the load current taken by the indicator lamps so that if one of a pair 24, 25 or 26, 27 is defective, the fault is indicated by an increase in the operating frequency. Flashing is initiated by actuation of indicator switch 28 and the simultaneous closure of ganged switch contact 22. The transistors 10, 11 become alternately conductive and since the collector of the transistor 10 is coupled through a transistor 37 to a threestage amplifier 32, 34, 35 a relay 31, connected to the amplifier output, is repeatedly energized at the multivibrator frequency to operate contacts 29, 30 and cause flashing of the lamps. The potential applied to the collector of transistor 10 from the positive line U B equals the volt drop across a resistor 17, this resistor together with a resistor 18 and switch 19 constituting a voltage divider. Thus, if switch 19 is closed there is a smaller volt drop across resistor 17 and the potential of the collector of transistor 10 is reduced whereby the multivibrator operating frequency is increased. With reference to Fig. 3 (not shown), there is described how switch 19 is closed upon failure of one of the indicator lamps, the switch 19 and also switch 22 being constituted by semi-conductors. The unit is intended for monolithic integrated circuit construction.
GB1238829D 1969-06-20 1970-06-19 Expired GB1238829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1931235A DE1931235C3 (en) 1969-06-20 1969-06-20 Flasher units, in particular for motor vehicles

Publications (1)

Publication Number Publication Date
GB1238829A true GB1238829A (en) 1971-07-14

Family

ID=5737490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238829D Expired GB1238829A (en) 1969-06-20 1970-06-19

Country Status (7)

Country Link
JP (1) JPS5015557B1 (en)
AT (1) AT310582B (en)
DE (1) DE1931235C3 (en)
FR (1) FR2049198B1 (en)
GB (1) GB1238829A (en)
NL (1) NL7009017A (en)
SE (1) SE376196B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436112A (en) * 1972-04-20 1976-05-19 Cav Ltd Direction indicator system for road vehicles
DE2236210C3 (en) * 1972-07-24 1980-07-24 Robert Bosch Gmbh, 7000 Stuttgart Flashing and warning flashers, in particular for motor vehicles
JPS528238B2 (en) * 1973-10-11 1977-03-08
DE2425410C3 (en) * 1974-05-25 1983-01-05 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Flasher device for vehicles, in particular motor vehicles
DE3118240C2 (en) * 1981-05-08 1984-08-02 Telefunken electronic GmbH, 7100 Heilbronn Flasher

Also Published As

Publication number Publication date
NL7009017A (en) 1970-12-22
FR2049198A1 (en) 1971-03-26
DE1931235A1 (en) 1971-01-14
DE1931235C3 (en) 1974-02-21
JPS5015557B1 (en) 1975-06-05
SE376196B (en) 1975-05-12
AT310582B (en) 1973-10-10
DE1931235B2 (en) 1973-08-02
FR2049198B1 (en) 1973-03-16

Similar Documents

Publication Publication Date Title
US3364384A (en) Speed controlled signal system for depicting driver's action
US3801975A (en) Lamp failure detecting system
GB1238829A (en)
US3940657A (en) Integrated circuit flasher
US2803811A (en) Vehicle direction indicator systems
US3656103A (en) Vehicle{40 s direction indicating lamp and brake lamp for combination use
SE326895B (en)
US3747062A (en) Direction indicating systems for road vehicles
US3582980A (en) Electronic lamp sequencing circuit
GB1040079A (en) Sequential flasher for vehicle signal lamps
GB1446430A (en) Direction indicator systems for tractor-trailer vehicles
US3470531A (en) Sequential flasher system
GB1125089A (en) Circuit for testing an occasional lamp on a road vehicle
GB1221155A (en) Flashing light signalling device, more particularly for automotive vehicles
US3746876A (en) Apparatus for providing a delayed vehicle control signal
FR2261904A1 (en) Road vehicle flashing lights - multiple use type repeating on trailer failure warning lamp indication
GB1112269A (en) Double load series flasher switch for vehicles
GB1383826A (en) Electronic two-terminal flasher unit
GB1253175A (en)
FR2356338A1 (en) Failure signalling circuit for cars trafficator lamps - uses AND=gate to detect open circuit and to switch=on fault signalling light
ES343420A1 (en) Improvements in or relating to Vehicle Signalling Systems
GB1297564A (en)
GB1264810A (en)
GB1070854A (en) Lamp flashing circuit
GB1033370A (en) Improvements in or relating to flashing light circuit arrangements

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee