GB1017349A - Improvements in or relating to electric circuits including electromagnetic relays - Google Patents
Improvements in or relating to electric circuits including electromagnetic relaysInfo
- Publication number
- GB1017349A GB1017349A GB4242062A GB4242062A GB1017349A GB 1017349 A GB1017349 A GB 1017349A GB 4242062 A GB4242062 A GB 4242062A GB 4242062 A GB4242062 A GB 4242062A GB 1017349 A GB1017349 A GB 1017349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- relay
- capacitor
- conduct
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
Abstract
1,017,349. Transistor relay circuits. GENERAL ELECTRIC CO. Ltd. Oct. 11, 1963 [Nov. 9, 1962], No. 42420/62. Heading H3T. A relay is controlled by a circuit comprising a transistor connected in series or parallel therewith and change-over of the relay at the end of the control signal is delayed by a capacitor connected between base and collector of the transistor. In Fig. 1 the application of a negative input signal at terminal 2 causes the transistor to conduct whereby a relay 10 is operated and a capacitor 13 is discharged via a diode 16. When the signal is removed the capacitor re-charges through a path including a diode 15 and the base of the transistor, maintaining the transistor conducting for a short period and so delaying the release of the relay. The flow of charging current from resistor 2 may be prevented if the resistor 5 is replaced by a diode. In Fig. 2 a negative input signal at terminal 22 causes transistor 24 to conduct whereby a relay 30 is operated and a capacitor 38 is discharged. When the signal is removed capacitor 38 re-charges via the base of a transistor 33 causing transistor 33 to conduct and maintain the relay operated for a short period. In both circuits the relay may alternatively be connected across the transistor or transistors so that their operation instead of relase is delayed. Reference has been directed by the Comptroller to Specification 930,115.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4242062A GB1017349A (en) | 1962-11-09 | 1962-11-09 | Improvements in or relating to electric circuits including electromagnetic relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4242062A GB1017349A (en) | 1962-11-09 | 1962-11-09 | Improvements in or relating to electric circuits including electromagnetic relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1017349A true GB1017349A (en) | 1966-01-19 |
Family
ID=10424333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4242062A Expired GB1017349A (en) | 1962-11-09 | 1962-11-09 | Improvements in or relating to electric circuits including electromagnetic relays |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1017349A (en) |
-
1962
- 1962-11-09 GB GB4242062A patent/GB1017349A/en not_active Expired
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