GB1122251A - Improvements in or relating to electronic time delay switching devices - Google Patents
Improvements in or relating to electronic time delay switching devicesInfo
- Publication number
- GB1122251A GB1122251A GB582566A GB582566A GB1122251A GB 1122251 A GB1122251 A GB 1122251A GB 582566 A GB582566 A GB 582566A GB 582566 A GB582566 A GB 582566A GB 1122251 A GB1122251 A GB 1122251A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- circuit
- time delay
- transistor
- delay switching
- 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
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
-
- 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
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
-
- 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
- H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
- H03K5/135—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals by the use of time reference signals, e.g. clock signals
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Electronic Switches (AREA)
Abstract
1,122,251. Transistor switching circuits. SOC. INDUSTRIELLE DE LIAISONS ELECTRIQUES. 10 Feb., 1966 [15 Oct., 1965], No. 5825/66. Heading H3T. In a time delay switching circuit pulses from a variable frequency oscillator (e.g. that using unijunction transistor T1) are used to discharge a pre-charged capacitor C2, the charge of which is monitored by a threshold circuit which maintains a relay energized until capacitor C2 has discharged below the threshold value. Capacitor C2 is preferably charged by closing contacts 10 so that each pulse from T1 turns on a transistor T2 which incrementally discharges C2 and thus feeds pulses of successively decreasing amplitude to a bi-stable circuit comprising transistors T4, T5. The output of the bi-stable circuit is amplified at T6, T7, rectified at D8 ... D11 and used to energize a relay R for a period of time until capacitor C2 has discharged sufficiently so as no longer to trigger the bi-stable circuit T4, T5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR35137A FR1469501A (en) | 1965-10-15 | 1965-10-15 | Static safety devices providing very long and very precise delays, which can be used in particular for actuating time relays on de-energization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1122251A true GB1122251A (en) | 1968-08-07 |
Family
ID=8590573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB582566A Expired GB1122251A (en) | 1965-10-15 | 1966-02-10 | Improvements in or relating to electronic time delay switching devices |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE675794A (en) |
| FR (1) | FR1469501A (en) |
| GB (1) | GB1122251A (en) |
-
1965
- 1965-10-15 FR FR35137A patent/FR1469501A/en not_active Expired
-
1966
- 1966-01-31 BE BE675794D patent/BE675794A/xx unknown
- 1966-02-10 GB GB582566A patent/GB1122251A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE675794A (en) | 1966-08-01 |
| FR1469501A (en) | 1967-02-17 |
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