IT1004913B - TRANSISTORIZED SAFETY PROTECTION EQUIPMENT FOR PAS ASSAYS AT RAILWAY LEVEL - Google Patents
TRANSISTORIZED SAFETY PROTECTION EQUIPMENT FOR PAS ASSAYS AT RAILWAY LEVELInfo
- Publication number
- IT1004913B IT1004913B IT67372/74A IT6737274A IT1004913B IT 1004913 B IT1004913 B IT 1004913B IT 67372/74 A IT67372/74 A IT 67372/74A IT 6737274 A IT6737274 A IT 6737274A IT 1004913 B IT1004913 B IT 1004913B
- Authority
- IT
- Italy
- Prior art keywords
- transistorized
- pas
- assays
- safety protection
- protection equipment
- Prior art date
Links
Classifications
-
- 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
- B61L29/28—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 electrically operated
- B61L29/286—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 electrically operated using conductor circuits controlled by the vehicle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00337596A US3819934A (en) | 1973-03-02 | 1973-03-02 | Fail-safe solid state highway crossing protection apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1004913B true IT1004913B (en) | 1976-07-20 |
Family
ID=23321184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT67372/74A IT1004913B (en) | 1973-03-02 | 1974-02-11 | TRANSISTORIZED SAFETY PROTECTION EQUIPMENT FOR PAS ASSAYS AT RAILWAY LEVEL |
Country Status (4)
Country | Link |
---|---|
US (1) | US3819934A (en) |
AU (1) | AU6013973A (en) |
CA (1) | CA965864A (en) |
IT (1) | IT1004913B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995173A (en) * | 1974-05-30 | 1976-11-30 | General Signal Corporation | Solid state fail-safe logic system |
US7250141B2 (en) * | 2004-02-27 | 2007-07-31 | Honeywell International, Inc. | Augmented catalytic heat exchanger system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3035167A (en) * | 1958-12-03 | 1962-05-15 | Westinghouse Air Brake Co | Railway track circuit |
US3046393A (en) * | 1958-12-12 | 1962-07-24 | Westinghouse Air Brake Co | Apparatus for the control of highway crossing signals |
US3004150A (en) * | 1959-08-04 | 1961-10-10 | Westinghouse Air Brake Co | Highway crossing protection systems |
GB1368604A (en) * | 1970-10-29 | 1974-10-02 | Westinghouse Brake & Signal | Static relaying circuit |
-
1973
- 1973-03-02 US US00337596A patent/US3819934A/en not_active Expired - Lifetime
- 1973-09-10 AU AU60139/73A patent/AU6013973A/en not_active Expired
-
1974
- 1974-02-11 IT IT67372/74A patent/IT1004913B/en active
- 1974-02-25 CA CA193,370A patent/CA965864A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA965864A (en) | 1975-04-08 |
AU6013973A (en) | 1975-03-13 |
US3819934A (en) | 1974-06-25 |
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