GB831205A - Improvements in or relating to electric circuit arrangements comprising one or more primary load circuits and one or more secondary load circuits - Google Patents
Improvements in or relating to electric circuit arrangements comprising one or more primary load circuits and one or more secondary load circuitsInfo
- Publication number
- GB831205A GB831205A GB3631456A GB3631456A GB831205A GB 831205 A GB831205 A GB 831205A GB 3631456 A GB3631456 A GB 3631456A GB 3631456 A GB3631456 A GB 3631456A GB 831205 A GB831205 A GB 831205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermistor
- load circuits
- relay
- switch
- switch means
- 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
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
- H05B39/10—Circuits providing for substitution of the light source in case of its failure
- H05B39/105—Circuits providing for substitution of the light source in case of its failure with a spare lamp in the circuit, and a possibility of shunting a failed lamp
Landscapes
- Electronic Switches (AREA)
Abstract
831,205. Switching systems for substitution loads. GENERAL ELECTRIC CO. Ltd. Nov. 27, 1957 [Nov. 27, 1956], No. 36314/56. Class 38 (4). In a circuit having a primary load 1, 2, and a secondary load 8 arranged to be connected in substitution by a switch means R1, a relay R2 is arranged in a common lead controlling the switch means so that if the primary load becomes open-circuited, the switch means is rendered ineffective after several switching operations, by means of a thermistor 18. Coil R11 of relay R1 is operated through a switch S and a three-way fuse 14-16, which is arranged to disconnect coil R11 only when the current through thermistor 18 rises due to contacts 13 of relay 2 closing successively. Capacitor C allows a small idling current to pass through the thermistor to reduce the effect of ambient temperature variations. A series resistor 17 is provided to improve the thermal stability of thermistor 18. The arrangement may be used to switch an auxiliary load in an airfield identification beacon circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3631456A GB831205A (en) | 1956-11-27 | 1956-11-27 | Improvements in or relating to electric circuit arrangements comprising one or more primary load circuits and one or more secondary load circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3631456A GB831205A (en) | 1956-11-27 | 1956-11-27 | Improvements in or relating to electric circuit arrangements comprising one or more primary load circuits and one or more secondary load circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB831205A true GB831205A (en) | 1960-03-23 |
Family
ID=10387003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3631456A Expired GB831205A (en) | 1956-11-27 | 1956-11-27 | Improvements in or relating to electric circuit arrangements comprising one or more primary load circuits and one or more secondary load circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB831205A (en) |
-
1956
- 1956-11-27 GB GB3631456A patent/GB831205A/en not_active Expired
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