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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 flux

Info

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
Application number
GB22073/56A
Inventor
Philip Cowlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danks Holding Ltd
Original Assignee
Bailey Meters and Controls Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bailey Meters and Controls Ltd filed Critical Bailey Meters and Controls Ltd
Priority to GB22073/56A priority Critical patent/GB834021A/en
Publication of GB834021A publication Critical patent/GB834021A/en
Expired legal-status Critical Current

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.
GB22073/56A 1956-07-17 1956-07-17 Improvements in or relating to incandescent electric lamp means for producing a stabilised or controlled light flux Expired GB834021A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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