GB834021A - Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light flux - Google Patents
Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light fluxInfo
- Publication number
- GB834021A GB834021A GB22073/56A GB2207356A GB834021A GB 834021 A GB834021 A GB 834021A GB 22073/56 A GB22073/56 A GB 22073/56A GB 2207356 A GB2207356 A GB 2207356A GB 834021 A GB834021 A GB 834021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- light flux
- lamp
- coil
- parallel
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Abstract
834,021. Controlling light flux. BAILEY METERS & CONTROLS Ltd. July 17, 1957 [July 17, 1956], No. 22073/56. Class 75(4) Means for producing a light flux which remains constant, or' which varies in a desired manner, with limited variations in the degree of energization of an electric lamp or lamps, comprises a light source including at least one incandescent electric lamp, light attenuating means adapted on movement to attentuate the light flux in a selected direction and an automatic adjusting means responsive to variations in the degree of energization of the lamp which adjusts the position of the movable member of the attenuating means. In the form shown, light from the source 1 reaches a lens 3 by way of two superposed plates 5, 6 having sets of parallel slits 7, 8, the plate 5 being fixed and the plate 6 movable so as to vary the overlap of the slits. The plate 6 is carried by springs and connected at one end to a former 16 carrying a helical coil 23 about half of which lies within an annular space in a permanent magnet 18 of the type having a central pole 18a and an annular pole 20. The coil is connected in parallel with the lamp through a metal rectifier, a smoothing condenser being arranged in parallel with the coil. It is also possible to connect the coil in series with the lamp in some cases. The moving plate can be provided with radially extending slots and be mounted to rotate about an axis at right angles to its surface. Alternatively, the Light attenuating means may consist of a set of parallel louvres which move from a position where they offer little obstruction to the light flux into one in which they completely obstruct the light.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22073/56A GB834021A (en) | 1956-07-17 | 1956-07-17 | Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light flux |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22073/56A GB834021A (en) | 1956-07-17 | 1956-07-17 | Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light flux |
Publications (1)
Publication Number | Publication Date |
---|---|
GB834021A true GB834021A (en) | 1960-05-04 |
Family
ID=10173466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22073/56A Expired GB834021A (en) | 1956-07-17 | 1956-07-17 | Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light flux |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB834021A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3457426A (en) * | 1965-05-28 | 1969-07-22 | Northrop Corp | Optical pick-off pressure transducer having fixed shutter and movable shutter having fixed portion |
US3590259A (en) * | 1970-04-20 | 1971-06-29 | Kinemotive Corp | Chopper stabilized photoelectric transducer |
DE2550559A1 (en) * | 1975-11-11 | 1977-09-29 | Abof Techn Bureau Bv | PROTECTIVE DEVICE, IN PARTICULAR FOR WELDING AND CUTTING WORK |
-
1956
- 1956-07-17 GB GB22073/56A patent/GB834021A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3457426A (en) * | 1965-05-28 | 1969-07-22 | Northrop Corp | Optical pick-off pressure transducer having fixed shutter and movable shutter having fixed portion |
US3590259A (en) * | 1970-04-20 | 1971-06-29 | Kinemotive Corp | Chopper stabilized photoelectric transducer |
DE2550559A1 (en) * | 1975-11-11 | 1977-09-29 | Abof Techn Bureau Bv | PROTECTIVE DEVICE, IN PARTICULAR FOR WELDING AND CUTTING WORK |
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