BE661483A - - Google Patents
Info
- Publication number
- BE661483A BE661483A BE661483DA BE661483A BE 661483 A BE661483 A BE 661483A BE 661483D A BE661483D A BE 661483DA BE 661483 A BE661483 A BE 661483A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/007—Fail-safe circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L29/00—Safety means for rail/road crossing traffic
- B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Mechanical Engineering (AREA)
- Logic Circuits (AREA)
- Networks Using Active Elements (AREA)
- Electronic Switches (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR969619A FR1398924A (fr) | 1964-04-03 | 1964-04-03 | Circuit logique de sécurité réalisant l'opération alpha, beta à fonction combinée négation et intersection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE661483A true BE661483A (el) | 1965-07-16 |
Family
ID=8826945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE661483D BE661483A (el) | 1964-04-03 | 1965-03-22 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3408507A (el) |
| BE (1) | BE661483A (el) |
| CH (1) | CH437419A (el) |
| DE (1) | DE1293841B (el) |
| ES (1) | ES311351A1 (el) |
| FR (1) | FR1398924A (el) |
| GB (1) | GB1099774A (el) |
| NL (1) | NL6504191A (el) |
| SE (1) | SE313596B (el) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1368604A (en) * | 1970-10-29 | 1974-10-02 | Westinghouse Brake & Signal | Static relaying circuit |
| US3890577A (en) * | 1973-08-15 | 1975-06-17 | Westinghouse Air Brake Co | Vital active low-pass filter |
| US3979690A (en) * | 1975-04-29 | 1976-09-07 | Westinghouse Electric Corporation | Failsafe controlled gain inverting amplifier apparatus |
| US3992636A (en) * | 1976-02-05 | 1976-11-16 | Allen-Bradley Company | Digital input circuit with fault detection means |
| US4042888A (en) * | 1976-02-26 | 1977-08-16 | Westinghouse Electric Corporation | Signal amplifier apparatus with fail-safe limited gain |
| US4336461A (en) * | 1980-09-22 | 1982-06-22 | E. I. Du Pont De Nemours And Company | Fail-safe apparatus |
| FR2499251B1 (fr) * | 1982-01-29 | 1986-02-07 | Ml Engineering Plymouth Ltd | Circuit detecteur de niveau de tension |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015737A (en) * | 1958-03-31 | 1962-01-02 | Gen Dynamics Corp | Transistorized phase discriminator |
| US3087074A (en) * | 1958-12-31 | 1963-04-23 | Ibm | Transistorized logic circuit operative in the pulse mode |
-
1964
- 1964-04-03 FR FR969619A patent/FR1398924A/fr not_active Expired
-
1965
- 1965-03-08 CH CH314865A patent/CH437419A/fr unknown
- 1965-03-22 BE BE661483D patent/BE661483A/xx unknown
- 1965-03-26 US US443140A patent/US3408507A/en not_active Expired - Lifetime
- 1965-03-27 DE DEC35445A patent/DE1293841B/de active Pending
- 1965-04-02 ES ES0311351A patent/ES311351A1/es not_active Expired
- 1965-04-02 NL NL6504191A patent/NL6504191A/xx unknown
- 1965-04-02 SE SE4280/65A patent/SE313596B/xx unknown
- 1965-04-05 GB GB14435/65A patent/GB1099774A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL6504191A (el) | 1965-10-04 |
| US3408507A (en) | 1968-10-29 |
| ES311351A1 (es) | 1965-06-01 |
| SE313596B (el) | 1969-08-18 |
| CH437419A (fr) | 1967-06-15 |
| DE1293841B (de) | 1969-04-30 |
| FR1398924A (fr) | 1965-05-14 |
| GB1099774A (en) | 1968-01-17 |