GB286265A - Improvements in illuminating bodies - Google Patents

Improvements in illuminating bodies

Info

Publication number
GB286265A
GB286265A GB5231/28A GB523128A GB286265A GB 286265 A GB286265 A GB 286265A GB 5231/28 A GB5231/28 A GB 5231/28A GB 523128 A GB523128 A GB 523128A GB 286265 A GB286265 A GB 286265A
Authority
GB
United Kingdom
Prior art keywords
lamp
reflector
enclosed
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
Application number
GB5231/28A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB286265A publication Critical patent/GB286265A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/205—Lighting for medical use for operating theatres

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

286,265. Zeiss, C. [Firm of]. March 2, 1927, [Convention date]. Overhead lamps.-In an overhead lamp, the generating curve of a reflector d, in the form of a concave surface of revolution, is such that all reflected rays from a 'substantially point source of light e, arranged on the axis g of rotation of the reflector, cross the axis between points such as h, i so as to form a shadowless, circular field of intense illumination f above an operating-table a or the like. The source of light may comprise a light-dispersing electric lamp bulb, or a clear bulb may be enclosed in a cover of frosted or opal glass. In the form shown in Fig. 2, a clear bulb e is .enclosed in a cover j of heat-absorbing glass which is provided with a reflecting zone k to intercept widely divergent rays and to return them to the reflector d, and the lamp casing l is enclosed by a disc m of wire-reinforced glass. Specification 17657/15, [Class 75 (ii), Lamp chimneys &c.], is referred to.
GB5231/28A 1927-03-02 1928-02-20 Improvements in illuminating bodies Expired GB286265A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE286265X 1927-03-02

Publications (1)

Publication Number Publication Date
GB286265A true GB286265A (en) 1928-10-18

Family

ID=6059028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5231/28A Expired GB286265A (en) 1927-03-02 1928-02-20 Improvements in illuminating bodies

Country Status (1)

Country Link
GB (1) GB286265A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872094A (en) * 1988-10-11 1989-10-03 Design Council Work station environmental system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872094A (en) * 1988-10-11 1989-10-03 Design Council Work station environmental system

Similar Documents

Publication Publication Date Title
GB1234895A (en) Improvements in or relating to lighting units
FR1531177A (en) Improvements to operating projectors with lighting distribution disc
GB286265A (en) Improvements in illuminating bodies
SE8104865L (en) bulb
US1977613A (en) Street lighting luminair
GB543663A (en) Improvements in adjustable reflectors for electric lamps
GB462312A (en) Improvements in or relating to shades or reflectors for electric lamps or other light sources
GB310929A (en) Improvements in incandescent electric lamps
SU700743A1 (en) Lighting fixture
GB648271A (en) Improvements relating to the projection of light rays
GB452009A (en) Improvements in or relating to electric light illuminations
US1304363A (en) Indirect and semi-indirect fixture
US1240505A (en) Lighting-fixture.
GB559646A (en) Improvements in or relating to illuminating devices
GB489010A (en) Improvements in and relating to luminairs
JPS5280668A (en) Illuminating method
GB276220A (en) Improvements in reflector-refractor light fittings
GB530492A (en) Improvements in optical systems comprising reflectors and linear light sources
GB392284A (en) Improvements in or relating to illuminating devices for use with mirrors
GB571242A (en) Incandescent electric projection lamp with rectifier
GB314226A (en) Improvements in reflectors for artificial lighting
GB290029A (en) Improvements in motor vehicle headlights and other light projecting devices
GB474141A (en) Improvements in and relating to luminairs
GB521329A (en) Improvements in luminairs
GB385561A (en) Anti-dazzle lamps