CA1038041A - Indicator lamp circuit having feedback protection - Google Patents

Indicator lamp circuit having feedback protection

Info

Publication number
CA1038041A
CA1038041A CA241,045A CA241045A CA1038041A CA 1038041 A CA1038041 A CA 1038041A CA 241045 A CA241045 A CA 241045A CA 1038041 A CA1038041 A CA 1038041A
Authority
CA
Canada
Prior art keywords
indicator
circuit
transformer
test
diode
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
CA241,045A
Other languages
English (en)
French (fr)
Inventor
Walter J. Kellogg
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
Application granted granted Critical
Publication of CA1038041A publication Critical patent/CA1038041A/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)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
CA241,045A 1974-12-16 1975-12-04 Indicator lamp circuit having feedback protection Expired CA1038041A (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
CA1038041A true CA1038041A (en) 1978-09-05

Family

ID=24125825

Family Applications (1)

Application Number Title Priority Date Filing Date
CA241,045A Expired CA1038041A (en) 1974-12-16 1975-12-04 Indicator lamp circuit having feedback protection

Country Status (10)

Country Link
US (1) US3939398A (en:Method)
JP (1) JPS5523440B2 (en:Method)
AU (1) AU501552B2 (en:Method)
BE (1) BE836658A (en:Method)
CA (1) CA1038041A (en:Method)
CH (1) CH600457A5 (en:Method)
DE (1) DE2555786A1 (en:Method)
ES (1) ES217402Y (en:Method)
GB (1) GB1524540A (en:Method)
ZA (1) ZA757462B (en:Method)

Families Citing this family (9)

* 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
WO1983003142A1 (en) * 1982-03-08 1983-09-15 Stephen Robert Laughlin 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
GB0809610D0 (en) * 2008-05-28 2008-07-02 Miller Andrew Transformer
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

Also Published As

Publication number Publication date
ES217402Y (es) 1977-01-01
AU501552B2 (en) 1979-06-21
DE2555786A1 (de) 1976-06-24
BE836658A (fr) 1976-06-15
CH600457A5 (en:Method) 1978-06-15
ZA757462B (en) 1976-11-24
JPS5523440B2 (en:Method) 1980-06-23
US3939398A (en) 1976-02-17
ES217402U (es) 1976-08-16
JPS5185697A (en:Method) 1976-07-27
AU8739875A (en) 1977-06-16
GB1524540A (en) 1978-09-13

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