GB883415A - Improvements in or relating to monitoring circuits - Google Patents
Improvements in or relating to monitoring circuitsInfo
- Publication number
- GB883415A GB883415A GB378957A GB378957A GB883415A GB 883415 A GB883415 A GB 883415A GB 378957 A GB378957 A GB 378957A GB 378957 A GB378957 A GB 378957A GB 883415 A GB883415 A GB 883415A
- Authority
- GB
- United Kingdom
- Prior art keywords
- direct current
- core
- transistor
- winding
- pulses
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
883,415. Circuits employing bi-stable magnetic elements. POSTMASTER GENERAL. May 2, 1958 [Feb. 4, 1957], No. 3789/57. Class 40 (9). An output pulse is produced in a lead L2 by way of a transistor VT1 when a direct current in a lead L falls below or exceeds predetermined limits, the direct current being applied to windings A on ferrite cores X1, X2, having rectangular hysteresis loops which are periodically driven to the set condition by pulses α2 and have output windings C connected to the transistor. Core XI is reset and produces an output pulse when the direct current exceeds a predetermined value, while core X2 is periodically reset by reference current pulses α1 in winding D which act in oppositionto the direct current in winding A. Core X2 therefore produces an output pulse in its winding C if the direct current is below a given value. The α1 and α2 pulses are applied alternatively to the cores so that the initial set conditions are re-established, the reference current pulse α1 being applied over a further core X3 and a transistor VT2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB378957A GB883415A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to monitoring circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB378957A GB883415A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to monitoring circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB883415A true GB883415A (en) | 1961-11-29 |
Family
ID=9764939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB378957A Expired GB883415A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to monitoring circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB883415A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2824180A1 (en) * | 1978-06-02 | 1979-12-06 | Bosch Gmbh Robert | Current monitoring threshold switch - induces pick=up coil pulse when polarised wire field is reversed by measurement current field |
-
1957
- 1957-02-04 GB GB378957A patent/GB883415A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2824180A1 (en) * | 1978-06-02 | 1979-12-06 | Bosch Gmbh Robert | Current monitoring threshold switch - induces pick=up coil pulse when polarised wire field is reversed by measurement current field |
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