ZA757462B - Indicator lamp circuit having feedback protection - Google Patents
Indicator lamp circuit having feedback protectionInfo
- Publication number
- ZA757462B ZA757462B ZA757462A ZA757462A ZA757462B ZA 757462 B ZA757462 B ZA 757462B ZA 757462 A ZA757462 A ZA 757462A ZA 757462 A ZA757462 A ZA 757462A ZA 757462 B ZA757462 B ZA 757462B
- Authority
- ZA
- South Africa
- Prior art keywords
- indicator lamp
- lamp circuit
- feedback protection
- feedback
- protection
- Prior art date
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)
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 |
|---|---|
| ZA757462B true ZA757462B (en) | 1976-11-24 |
Family
ID=24125825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA757462A ZA757462B (en) | 1974-12-16 | 1975-11-26 | Indicator lamp circuit having feedback protection |
Country Status (10)
Families Citing this family (9)
| 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 |
| EP0104161A1 (en) * | 1982-03-08 | 1984-04-04 | 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 |
| 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)
| 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 |
-
1974
- 1974-12-16 US US05/533,407 patent/US3939398A/en not_active Expired - Lifetime
-
1975
- 1975-11-26 ZA ZA757462A patent/ZA757462B/xx unknown
- 1975-12-04 CA CA241,045A patent/CA1038041A/en not_active Expired
- 1975-12-10 AU AU87398/75A patent/AU501552B2/en not_active Expired
- 1975-12-11 DE DE19752555786 patent/DE2555786A1/de not_active Withdrawn
- 1975-12-11 GB GB50811/75A patent/GB1524540A/en not_active Expired
- 1975-12-15 BE BE1007080A patent/BE836658A/xx unknown
- 1975-12-15 ES ES1975217402U patent/ES217402Y/es not_active Expired
- 1975-12-15 CH CH1622175A patent/CH600457A5/xx not_active IP Right Cessation
- 1975-12-16 JP JP14920675A patent/JPS5523440B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2555786A1 (de) | 1976-06-24 |
| ES217402Y (es) | 1977-01-01 |
| AU501552B2 (en) | 1979-06-21 |
| GB1524540A (en) | 1978-09-13 |
| BE836658A (fr) | 1976-06-15 |
| US3939398A (en) | 1976-02-17 |
| CH600457A5 (US20020128544A1-20020912-P00008.png) | 1978-06-15 |
| JPS5185697A (US20020128544A1-20020912-P00008.png) | 1976-07-27 |
| AU8739875A (en) | 1977-06-16 |
| ES217402U (es) | 1976-08-16 |
| CA1038041A (en) | 1978-09-05 |
| JPS5523440B2 (US20020128544A1-20020912-P00008.png) | 1980-06-23 |
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