GB931722A - Improvements in and relating to flashing warning or guiding lamps - Google Patents
Improvements in and relating to flashing warning or guiding lampsInfo
- Publication number
- GB931722A GB931722A GB261361A GB261361A GB931722A GB 931722 A GB931722 A GB 931722A GB 261361 A GB261361 A GB 261361A GB 261361 A GB261361 A GB 261361A GB 931722 A GB931722 A GB 931722A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- reflectors
- shutter
- light
- bulb
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
- G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
Abstract
931,722. Beacons. M. C. HARLEY. Jan. 22, 1962 [Jan. 23, 1961], No. 2613/61. Classes 75 (2) and 75 (4). A flashing guiding or warning lamp comprises a concentrated electric light source, a reflector serving to project all the emitted light as a vertical beam, an auxiliary conical or partconical reflector from which the beam is projected on a horizontal plane covering a substantial angle and a rotating shutter means so formed as to permit emission of part only of the light from the lamp, so as to produce, on rotation of the shutter the effect of a flashing light. In place of a separate shutter, one of the reflectors may have non-reflecting sectors or be covered by sectors of masking material. In the form shown, a bulb 5 is mounted in a socket at the apex of a reflector 3, the filament being situated at the focus of a parabolic reflector 7, the edges of which are connected by a cylindrical window 8 to the base of the reflector 3. A cylinder 9 which may have three equally spaced openings 10 surrounds the window 8 and is rotated on a shaft 1] coaxial with the reflectors 3, 7 by a pulley 14 driven by a motor 13. A cap 6 surrounds the base of the bulb 5 to cut off direct light from the bulb to the reflector 3 and window 8. In a modification, the shutter is in the form of a disc arranged between the reflectors. Alternatively it may be of similar shape to and arranged adjacent to one or other of the reflectors. Specifications 633,367 and 900,907 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB261361A GB931722A (en) | 1961-01-23 | 1961-01-23 | Improvements in and relating to flashing warning or guiding lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB261361A GB931722A (en) | 1961-01-23 | 1961-01-23 | Improvements in and relating to flashing warning or guiding lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB931722A true GB931722A (en) | 1963-07-17 |
Family
ID=9742651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB261361A Expired GB931722A (en) | 1961-01-23 | 1961-01-23 | Improvements in and relating to flashing warning or guiding lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB931722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205366A (en) * | 1976-12-27 | 1980-05-27 | Dominion Auto Accessories Limited | Emergency warning lamp |
-
1961
- 1961-01-23 GB GB261361A patent/GB931722A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205366A (en) * | 1976-12-27 | 1980-05-27 | Dominion Auto Accessories Limited | Emergency warning lamp |
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