GB987405A - Improvements in or relating to electric circuits with groups of relays actuated by current impulses - Google Patents
Improvements in or relating to electric circuits with groups of relays actuated by current impulsesInfo
- Publication number
- GB987405A GB987405A GB1701861A GB1701861A GB987405A GB 987405 A GB987405 A GB 987405A GB 1701861 A GB1701861 A GB 1701861A GB 1701861 A GB1701861 A GB 1701861A GB 987405 A GB987405 A GB 987405A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holding
- pulses
- current
- relay
- windings
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
Landscapes
- Relay Circuits (AREA)
Abstract
987,405. Relay circuits. EL-RE-MA S.A. PER LO SPRUTTAMENTO DI BREVETTI. May 10, 1961, No. 17018/61. Headings H3P and H3T. A pulse operated relay is held, between pulses, by a holding circuit including a static switch device which interrupts the holding current when the pulses are present.Two relays of a group of relays have respective operating windings A, B and respective holding windings MA, MB, the latter windings, being connected in a circuit containing a contact SMA, SMB and a D.C. supply Ba. The operating windings are connected to pulse sources IgI, IgIII so that if a contact a or b is closed the next pulse will operate the relay and it will be held operated by the holding circuit. The succeeding pulses will each produce a sufficient voltage across R2 to block rectifier Dv and so reduce the holding current-momentarily to zero. The relay is released by interrupting the control winding pulses and opening contact SMA or SMB. The arrangement is such that the contacts may be opened or closed at times when they are not connected to a source of current. The holding winding may be connected in the output circuit of a transistor the current through which is controlled by the voltage across resistor R1 or R2 or across a diode replacing the resistor (Fig. 4, not shown). When the voltage in the holding circuit is large, series connected transistors may be used (Fig. 5, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1701861A GB987405A (en) | 1961-05-10 | 1961-05-10 | Improvements in or relating to electric circuits with groups of relays actuated by current impulses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1701861A GB987405A (en) | 1961-05-10 | 1961-05-10 | Improvements in or relating to electric circuits with groups of relays actuated by current impulses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB987405A true GB987405A (en) | 1965-03-31 |
Family
ID=10087744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1701861A Expired GB987405A (en) | 1961-05-10 | 1961-05-10 | Improvements in or relating to electric circuits with groups of relays actuated by current impulses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB987405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143010A (en) * | 1983-06-23 | 1985-01-30 | Dessau Zementkombinat | Fire-resistant chamber with an arched roof |
-
1961
- 1961-05-10 GB GB1701861A patent/GB987405A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143010A (en) * | 1983-06-23 | 1985-01-30 | Dessau Zementkombinat | Fire-resistant chamber with an arched roof |
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