ZA754198B - Fail-safe time delay circuit for relays - Google Patents
Fail-safe time delay circuit for relaysInfo
- Publication number
- ZA754198B ZA754198B ZA00754198A ZA754198A ZA754198B ZA 754198 B ZA754198 B ZA 754198B ZA 00754198 A ZA00754198 A ZA 00754198A ZA 754198 A ZA754198 A ZA 754198A ZA 754198 B ZA754198 B ZA 754198B
- Authority
- ZA
- South Africa
- Prior art keywords
- relays
- fail
- time delay
- delay circuit
- safe time
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/601—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors using transformer coupling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Pulse Circuits (AREA)
- Electronic Switches (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7423001A FR2277426A1 (en) | 1974-07-02 | 1974-07-02 | Delay circuit for safety relays - has pulse shaping circuit with capacitor controlled by transistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA754198B true ZA754198B (en) | 1976-06-30 |
Family
ID=9140787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA00754198A ZA754198B (en) | 1974-07-02 | 1975-07-01 | Fail-safe time delay circuit for relays |
Country Status (8)
| Country | Link |
|---|---|
| AU (1) | AU498894B2 (en) |
| BE (1) | BE830864A (en) |
| BR (1) | BR7504052A (en) |
| CA (1) | CA1045241A (en) |
| ES (1) | ES438374A1 (en) |
| FR (1) | FR2277426A1 (en) |
| LU (1) | LU72867A1 (en) |
| ZA (1) | ZA754198B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2524738B1 (en) * | 1982-04-02 | 1986-05-16 | Jeumont Schneider | TIMING CIRCUIT WITH INTRINSIC SAFETY |
| US20230218166A1 (en) * | 2020-04-17 | 2023-07-13 | Szuster Holdings Llc | Ophthalmic portable laser slit lamp and method for eye inspection |
-
1974
- 1974-07-02 FR FR7423001A patent/FR2277426A1/en active Granted
-
1975
- 1975-06-10 ES ES438374A patent/ES438374A1/en not_active Expired
- 1975-06-27 BR BR5203/75D patent/BR7504052A/en unknown
- 1975-06-30 AU AU82569/75A patent/AU498894B2/en not_active Expired
- 1975-06-30 LU LU72867A patent/LU72867A1/xx unknown
- 1975-06-30 CA CA230,433A patent/CA1045241A/en not_active Expired
- 1975-07-01 ZA ZA00754198A patent/ZA754198B/en unknown
- 1975-07-01 BE BE1006758A patent/BE830864A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BE830864A (en) | 1975-11-03 |
| BR7504052A (en) | 1976-06-29 |
| CA1045241A (en) | 1978-12-26 |
| AU498894B2 (en) | 1979-03-29 |
| ES438374A1 (en) | 1977-01-16 |
| LU72867A1 (en) | 1975-10-08 |
| FR2277426B1 (en) | 1976-12-24 |
| AU8256975A (en) | 1977-01-06 |
| FR2277426A1 (en) | 1976-01-30 |
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