GB279783A - Improvements in light signals - Google Patents
Improvements in light signalsInfo
- Publication number
- GB279783A GB279783A GB14275/27A GB1427527A GB279783A GB 279783 A GB279783 A GB 279783A GB 14275/27 A GB14275/27 A GB 14275/27A GB 1427527 A GB1427527 A GB 1427527A GB 279783 A GB279783 A GB 279783A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- bulb
- screens
- signal
- filament
- 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)
- Traffic Control Systems (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Abstract
279,783. Westinghouse Brake & Saxby Signal Co., Ltd., (Assignees of Fisher, A. W., and Wells, W. B.). Oct. 27, 1926, [Convention date]. Signal lamps; lantern screens.-In a signal lamp comprising an electric lamp bulb with a filament in the optical axis of a projection lens and a number of opaque screens arranged concentrically about the axis of the lens, the filament is arranged eccentrically within the bulb, so that light proceeding from an outside source striking the lens in a, direction parallel to the axis and reflected from the surface of the bulb is intercepted by the opaque screens to prevent a phantom indication. In the form shown in the Figure, a bulb A has an eccentrically arranged filament 1 located at the focus of a doublet of echelon lens C<1>, C<2> and a number of concentric opaque cylindrical screens D are arranged between the outer lens C<2> and an outer cover glass E. The innermost cylindrical screen D<1> supports two flat ribs 9 intersecting each other at right angles, and the central portion of the inner surface of the cover glass E is provided with a number of horizontal prisms 12 so as to give an indication close to the signal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US279783XA | 1926-10-27 | 1926-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB279783A true GB279783A (en) | 1928-08-27 |
Family
ID=21840878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14275/27A Expired GB279783A (en) | 1926-10-27 | 1927-05-27 | Improvements in light signals |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE467797C (en) |
GB (1) | GB279783A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145809A (en) * | 1983-08-29 | 1985-04-03 | Canadian Patents Dev | Lightning panel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE930593C (en) * | 1949-07-29 | 1955-07-21 | Westinghouse Brake & Signal | Device for generating a light beam |
-
1927
- 1927-05-27 GB GB14275/27A patent/GB279783A/en not_active Expired
- 1927-09-03 DE DEW76980D patent/DE467797C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145809A (en) * | 1983-08-29 | 1985-04-03 | Canadian Patents Dev | Lightning panel |
Also Published As
Publication number | Publication date |
---|---|
DE467797C (en) | 1928-10-31 |
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