GB1524540A - Indicator lamp circuit having feedback protection - Google Patents

Indicator lamp circuit having feedback protection

Info

Publication number
GB1524540A
GB1524540A GB50811/75A GB5081175A GB1524540A GB 1524540 A GB1524540 A GB 1524540A GB 50811/75 A GB50811/75 A GB 50811/75A GB 5081175 A GB5081175 A GB 5081175A GB 1524540 A GB1524540 A GB 1524540A
Authority
GB
United Kingdom
Prior art keywords
diodes
lead
diode
test
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
GB50811/75A
Other languages
English (en)
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1524540A publication Critical patent/GB1524540A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01R31/44—Testing lamps

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
GB50811/75A 1974-12-16 1975-12-11 Indicator lamp circuit having feedback protection Expired GB1524540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/533,407 US3939398A (en) 1974-12-16 1974-12-16 Indicator lamp circuit having feedback protection

Publications (1)

Publication Number Publication Date
GB1524540A true GB1524540A (en) 1978-09-13

Family

ID=24125825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50811/75A Expired GB1524540A (en) 1974-12-16 1975-12-11 Indicator lamp circuit having feedback protection

Country Status (10)

Country Link
US (1) US3939398A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5523440B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU501552B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE836658A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1038041A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH600457A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2555786A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES217402Y (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1524540A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA757462B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2460334A (en) * 2008-05-28 2009-12-02 Andrew Miller Transformer having isolation means

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2490349A1 (fr) * 1980-09-17 1982-03-19 Aerospatiale Dispositif pour la verification automatique d'une pluralite de voyants electriques
AU8149582A (en) * 1982-03-08 1983-10-18 Laughlin, Stephen Robert A circuit arrangement for enabling simultaneous operation of independent ac circuits
US5148158A (en) * 1988-03-24 1992-09-15 Teledyne Industries, Inc. Emergency lighting unit having remote test capability
US5889660A (en) * 1997-03-06 1999-03-30 Eaton Corporation Isolated power supply for indicator light
CN102375109B (zh) 2010-07-09 2015-06-03 米沃奇电动工具公司 照明测试仪
US20120086460A1 (en) * 2010-10-12 2012-04-12 Baker Hughes Incorporated System and method for operating monitoring elements and single use elements with a common cable
CN107643455A (zh) * 2016-07-21 2018-01-30 西安奥特迅电力电子技术有限公司 一种用于铁路功率调节器功率单元的对拖试验测试的控制平台
CN112986868B (zh) * 2021-04-16 2021-08-31 成都工百利自动化设备有限公司 一种变压器状态监测方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2839741A (en) * 1956-02-24 1958-06-17 Theodore W Hallerberg Indicator lamp test circuit
US3040243A (en) * 1959-03-20 1962-06-19 Ecp Corp Test circuit for an indicator system
US3840801A (en) * 1973-09-18 1974-10-08 Westinghouse Electric Corp Indicator light testing circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2460334A (en) * 2008-05-28 2009-12-02 Andrew Miller Transformer having isolation means
GB2460334B (en) * 2008-05-28 2012-06-27 Andrew Miller Transformer

Also Published As

Publication number Publication date
CA1038041A (en) 1978-09-05
CH600457A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-06-15
AU501552B2 (en) 1979-06-21
DE2555786A1 (de) 1976-06-24
JPS5185697A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-07-27
BE836658A (fr) 1976-06-15
ZA757462B (en) 1976-11-24
US3939398A (en) 1976-02-17
ES217402U (es) 1976-08-16
ES217402Y (es) 1977-01-01
AU8739875A (en) 1977-06-16
JPS5523440B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-06-23

Similar Documents

Publication Publication Date Title
US5086294A (en) Indicator circuit for protecting light emitting diode
US3967257A (en) Current monitor circuits
GB1524540A (en) Indicator lamp circuit having feedback protection
US3797008A (en) Fire detecting system
US3840801A (en) Indicator light testing circuit
US3040243A (en) Test circuit for an indicator system
US4025845A (en) System with photocouplers for automatic checking of operating thyristors
US3624482A (en) Field disconnect and indicator circuit for a vehicle charging system
GB1308693A (en) Circuit arrangement for indicating the failure of a lamp
GB1320489A (en) Fire alarm system
US3585453A (en) Device for protecting electrical load of automotive vehicles
US3729656A (en) Indicator circuits for electric fuse devices
US3505664A (en) Switch condition indicator
GB1412036A (en) Interface assembly in a process control system for use where there is a fire hazard
US3094647A (en) Circuit protection means
US3967192A (en) Indicator lamp test circuit utilizing bidirectional thyristor switching
US2769970A (en) Indicator lamp dimming circuit
US3449737A (en) Overpotential indicator device control circuit
GB2083236A (en) Solid state status indication circuit for power controllers
GB938407A (en) Improvements in or relating to rectifying circuit arrangements including semi-conducting elements
US2809329A (en) Series lamp circuit with normal and stand-by lamps
GB1197071A (en) Improvements in and relating to apparatus for Remote Control and Signalling
GB1468979A (en) Emergency electricity control device
US3586975A (en) A voltage monitoring circuit for simultaneously detecting excessive excursions of a plurality of primary voltage source
FR2309121A7 (fr) Dispositif de signalisation de la coupure de circuits d'alimentation en courant continu

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee