GB502980A - Improvements in colour-light signals - Google Patents
Improvements in colour-light signalsInfo
- Publication number
- GB502980A GB502980A GB2788237A GB2788237A GB502980A GB 502980 A GB502980 A GB 502980A GB 2788237 A GB2788237 A GB 2788237A GB 2788237 A GB2788237 A GB 2788237A GB 502980 A GB502980 A GB 502980A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- colour
- signal
- light signals
- giving
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/12—Visible signals
- B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
- B61L5/1809—Daylight signals
- B61L5/1845—Optical systems, lenses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Traffic Control Systems (AREA)
Abstract
502,980. Signal lamps. BOOT, J., and GENERAL RAILWAY SIGNAL CO., Ltd. Oct. 13, 1937, No. 27882. [Classes 75 (ii) and 75 (iv)] A colour light signal giving close-up indications and eliminating phantom lights comprises a lens as shown giving a substantially parallel central beam of light and an outer divergent beam, and a clear cover-glass 8 having inclined walls 2 preferably roughened or fluted. A metal or other opaque tubular member 14 having radial fins 15 may be used in the system. In signals of the multi-unit type the lens is coloured. Specification 144,282, [Class 75 (ii)], is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2788237A GB502980A (en) | 1937-10-13 | 1937-10-13 | Improvements in colour-light signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2788237A GB502980A (en) | 1937-10-13 | 1937-10-13 | Improvements in colour-light signals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB502980A true GB502980A (en) | 1939-03-29 |
Family
ID=10266811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2788237A Expired GB502980A (en) | 1937-10-13 | 1937-10-13 | Improvements in colour-light signals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB502980A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1535820A2 (en) * | 2003-11-25 | 2005-06-01 | Siemens Aktiengesellschaft | Light signal |
DE102008039188A1 (en) * | 2008-08-20 | 2010-05-27 | Siemens Aktiengesellschaft | Ground-level light signal |
CN105050880A (en) * | 2013-03-27 | 2015-11-11 | 西门子公司 | Light signal |
-
1937
- 1937-10-13 GB GB2788237A patent/GB502980A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1535820A2 (en) * | 2003-11-25 | 2005-06-01 | Siemens Aktiengesellschaft | Light signal |
EP1535820A3 (en) * | 2003-11-25 | 2006-06-07 | Siemens Aktiengesellschaft | Light signal |
DE102008039188A1 (en) * | 2008-08-20 | 2010-05-27 | Siemens Aktiengesellschaft | Ground-level light signal |
CN105050880A (en) * | 2013-03-27 | 2015-11-11 | 西门子公司 | Light signal |
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