US1597185A - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
US1597185A
US1597185A US746272A US74627224A US1597185A US 1597185 A US1597185 A US 1597185A US 746272 A US746272 A US 746272A US 74627224 A US74627224 A US 74627224A US 1597185 A US1597185 A US 1597185A
Authority
US
United States
Prior art keywords
corridor
bowl
light
side walls
floor
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 - Lifetime
Application number
US746272A
Other languages
English (en)
Inventor
William A Dorey
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.)
Holophane Corp
Original Assignee
Holophane Corp
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 Holophane Corp filed Critical Holophane Corp
Priority to US746272A priority Critical patent/US1597185A/en
Priority to FR600051D priority patent/FR600051A/fr
Application granted granted Critical
Publication of US1597185A publication Critical patent/US1597185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources

Definitions

  • the object of the present invention is to secure a distribution of light elongated in the direction of the hallway so that units can be spaced widely apart without sacrificing uni- 5 formity and without wasting too much light on walls and corridor.
  • I accomplish this by applying a special bowl arrangement to a bowl-type luminaire, in which a central area of the bowl is given an exact and defi- 1 0 nite limit or boundaries which will permit transmission of all light within the boundaries to be illuminated which can be obtained in that way without means for lateral deviation.
  • Fig. l is a plan view of the interiorsurface of a refracting bowl employed in my invention shown in diagrammatic form, and
  • Fig. 2 is a vertical cross section in the plane ,2-2 of Fig. l showing the interior only, also in diagrammatic form,
  • Figs. 8- and Il are diagrammatic views of a typical corridor showing the luminaires ⁇ in exaggerated scale. i i
  • Fig. 5 is a vertical cross section in a piane parallel to the hall, of a complete form of my device showing the relation between light source, reflector and bowl.
  • Fig. 5 which is a vertical cross section in the plane of the center line ofthe cor 50 ridor.
  • 7 is the light source
  • 8 is a refiector having on its outersurface double reflecting prisms
  • 9 is the lower bowl having horizontal refracting prisms l0 covering its exterior and adapted to transmit light reflected from the reflector and light received direct from thesource.
  • the more distinctive part of the invention, the lower bowl is shown in diagrammatic form in Figs. l and 2.
  • the central section 5 will be a strip extending across the whole surface of the bowl, and its area in proportion to the whole and also the contour of the intercepts will be determined very definitely by the installation conditions assumed, by the shape of the bowl and by the form of distribution of light in vertical planes from the horizontal prisms.
  • the side walls at points intermediate between two luminaires and thus promote uniformity of illumination of the side walls.
  • Figs. 3 and 4 are diagrammatic views of the corridoi' showing the luminaires in eX- aggerated scale, so as to show the' setting of the central section 5 and the Iouter section 6 and 6 with reference to the conditions of the installations.
  • Fig. 3 is a diagrammatic vertical cross section of a typical corridor in a plane at ll and Il are light rays issuing from the extreme boundaries ofthe area 5 and delivered at the junction between walls and floor. ⁇ Now if you consider any slanting cross section of -v the corridor the light rays emitted in that cross section from the boundaries of the area 5 will be delivered at the junction between walls and floor, the boundaries of area 5 having been shaped lto take care of y the change in angular relation between the limiting rays similar to l1 and l1.
  • Fig. l is a diagrammatic plan of' a portion of a corridor.
  • v l2 and 12 are projections of the path of the light rays issuing from the eXtreme boundaries of the area 5 and delivered midway between units at the junction between wallsand floor. If these be extended they will pass through thecenter of the plan of the luminaire because they have not beensubject to lateral deiiection.
  • 13 and 13 are projections of the path of typical light rays issuing from areas 6 and G and delivered at the same points as il and 1l. If these be extended they will not pass through the centre of the plan of the luminaire because they have been subjected to a lateral deflection.
  • the area 5 lays down a light pattern substantially coincident with a unit portion of the floor havingits centre at the luminaire and the areas 6 and 6 deiiect the light rays laterally in thel direction of the longest dimension of this unit floor portion so as toincrease the light on the floor, soften the edges of the A light pattern and reduce the light on the walls directly opposite the units.
  • a luminaire for corridor lighting comprising a light source, a reflector and bowl forming a unit enclosing the source?, ⁇ the bowl having a central area with its major axis paralleling the side walls of the corridor and comparatively denser, adjacent areas.
  • a luminaire for corridor lighting comprisino' a light source, a reHect'or and bowl forming-a unit enclosing the source, the bowl having a central area with its major axis paralleling the side walls of the corridor and adjacent areas adapted to direct light rays to the floor within thelimits Iof l the side walls.
  • a luminaire for corridor lighting comprising a light source, a refiector and bowl forming a unit enclosing the source, the
  • a luminaire for corridor lighting comprising a light source, a reflector and bowl forming a unit enclosing the source, the reflector having double reiiecting prisms on its outer surface, and the bowl having on its inm terior surface a central area within its major axis paralleling the side walls of the corridor and adjacent areas provided on their inner surfaces with radial retracting corruga tions adapted to direct light rays towards the iioor within the limits ot the side walls.
  • a luminaire tor corridor lighting comprising a light source, and a bowl enclosing the source, the bowl having a comparatively non-detlecting central area with its major axis paralleling the side walls of the corridor and adjacent areas provided with radial refracting corrugations, the plain area being limited to that portion of the surface adapted to emit light rays to the floor of the corridor within the limits et the side walls and the corrugated areas being adapted to deflect light rays laterally towards the floor.
  • a luminaire for corridor lighting comprising a light source, and a bowl enclosing the source, the bowl having on its interior surface a comparativelyY non-deflecting cen tral area with its major axis paralleling the side walls of the corridor and adjacent areas provided with radial retracting corrugations, the plain area being limited to that portion of the surface adapted to emit light rays to the floor of the corridor within the limits of the side walls and the corrugated areas being adapted to deiiect light rays laterally towards the Hoor.
  • a luminaire for corridor lighting comprising a light source7 a reiiector andvbowl ltorming a unit enclosing the source, the bowl having on its interior surface a comparative ly non-deflecting central area with its major 1 axis paralleling the side walls of the corridor and adjacent areas provided with radial refracting corrugations, the plain area hobos limited to that portion of the surface adapted to emit light rays to the floor oi the corridoi' within the limits of the side walls and the corrugated areas being adapted to deflect light rays laterallyT towards the floor.
  • a luminaire for corridor lighting comprising a light source, a reflector and bowl forming a unit enclosing the source, the bowl having a. central area with its major axis paralleling the side walls ot the corridor and adjacent areas provided with radial refracting corrugations, the central area being limited to that portion of the surface adapted to emit light rays to the floor-'of the corridor within the limits of the side walls and the corrugated areas being adapted to deflect light rays laterally towards the floor.
  • a luminaire for Corridor lighting comprising a light source, a reflector having double reflecting prisms on its outer surface and a bowl forming a unit enclosing the source, the bowl having a central area with its major axis paralleling the side walls of the corridor and adjacent areas provided with radial refracting corrugations, the central area being limited to that portion of the surface adapted to emit light rays to the floor of the corridor within the limits oi' the side Walls and the corrugated areas being adaptd to deflect light rays laterally towards the oor.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US746272A 1924-10-28 1924-10-28 Luminaire Expired - Lifetime US1597185A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US746272A US1597185A (en) 1924-10-28 1924-10-28 Luminaire
FR600051D FR600051A (fr) 1924-10-28 1925-06-24 Appareil d'éclairage pour couloirs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US746272A US1597185A (en) 1924-10-28 1924-10-28 Luminaire

Publications (1)

Publication Number Publication Date
US1597185A true US1597185A (en) 1926-08-24

Family

ID=25000133

Family Applications (1)

Application Number Title Priority Date Filing Date
US746272A Expired - Lifetime US1597185A (en) 1924-10-28 1924-10-28 Luminaire

Country Status (2)

Country Link
US (1) US1597185A (fr)
FR (1) FR600051A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493087A (en) * 1949-02-02 1950-01-03 Holophane Co Inc Street lighting luminaire
US4159511A (en) * 1976-11-30 1979-06-26 Societe Parisienne des Anciens Etablissements Bariber, Benard & Turenne Shadowless lighting appliance for surgical operating theatres and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493087A (en) * 1949-02-02 1950-01-03 Holophane Co Inc Street lighting luminaire
US4159511A (en) * 1976-11-30 1979-06-26 Societe Parisienne des Anciens Etablissements Bariber, Benard & Turenne Shadowless lighting appliance for surgical operating theatres and the like

Also Published As

Publication number Publication date
FR600051A (fr) 1926-01-29

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