EP1134483A2 - Dispositif d' éclairage à diffusion variable - Google Patents

Dispositif d' éclairage à diffusion variable Download PDF

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Publication number
EP1134483A2
EP1134483A2 EP01106835A EP01106835A EP1134483A2 EP 1134483 A2 EP1134483 A2 EP 1134483A2 EP 01106835 A EP01106835 A EP 01106835A EP 01106835 A EP01106835 A EP 01106835A EP 1134483 A2 EP1134483 A2 EP 1134483A2
Authority
EP
European Patent Office
Prior art keywords
diffusing screen
lamp
support
holder device
shade
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.)
Withdrawn
Application number
EP01106835A
Other languages
German (de)
English (en)
Other versions
EP1134483A3 (fr
Inventor
Claudio Bellini
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.)
Artemide SpA
Original Assignee
Artemide SpA
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 Artemide SpA filed Critical Artemide SpA
Publication of EP1134483A2 publication Critical patent/EP1134483A2/fr
Publication of EP1134483A3 publication Critical patent/EP1134483A3/fr
Withdrawn legal-status Critical Current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
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/14—Covers for frames; Frameless shades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light

Definitions

  • the present invention relates to a lighting device, wherein diffusion of the light emitted can be adjusted easily and effectively by the user. Though reference is made in the following description to suspended lighting devices fixed to a ceiling and normally suspended by one or more supporting cables, the invention is in no way to be inferred as being limited to this particular application.
  • Suspended lighting devices are normally used to illuminate specific areas of a room, e.g. the dining area, studio area, etc., from above. Which applications frequently call for lighting the area with diffused light or stronger, localized light, depending on the circumstances involved.
  • a lighting device in particular a suspended lamp, comprising a lamp-holder device for a light source; a first diffusing screen; and a support having an electric power lead and integrally supporting the first diffusing screen and the lamp-holder device; characterized by also comprising, in combination, a second diffusing screen housed between the lamp-holder device and the first diffusing screen; and a carriage integrally supporting said lamp-holder device and fitted movably to guide means carried integrally by the support; said second diffusing screen being smaller than the first diffusing screen, and being displaced with respect to the first diffusing screen in a predetermined direction; said carriage being movable selectively, along said guide means and in said predetermined direction, between at least two operating positions, in at least one of which, substantially all the light emitted by said light source only passes through said first diffusing screen.
  • said first and said second diffusing screen are defined by respective cup-shaped bodies defined by respective surfaces pervious to light, and having a common axis of symmetry defining said predetermined direction; the second diffusing screen being housed inside the first so as to only occupy part of the volume of the first diffusing screen in said predetermined direction, and having a coloured filter formed integrally with or carried by the second diffusing screen.
  • Number 1 in Figures 1 and 2 indicates as a whole a lighting device defined, for example, by a suspended lamp of conventional design and overall configuration, and comprising a support 2 with an electric power cable 3; a conventional lamp-holder device 4 for a light source defined, for example, by a bulb 6; and a diffusing screen defined by a conventional shade 7 in turn defined by a lateral surface 7a pervious to light but preferably not transparent.
  • shade 7 is defined by a truncated-cone-cup-shaped body made of glass - e.g. frosted, opal, or with diffraction means - and fitted to and projecting from the bottom of support 2. More specifically, the minor base 8 of shade 7 has a hole and is gripped between two flanged members 9, 10 of support 2. Support 2 also comprises a hollow body 11 housing a portion 12 - unsheathed in the example shown-of lead 3; a known ceiling attachment 13; and a cable 14 by which body 11 is suspended from attachment 13.
  • device 1 also comprises a second diffusing screen 20 housed between lamp-holder device 4 and diffusing screen or shade 7.
  • Diffusing screen 20 is also defined by a truncated-cone-cup-shaped body smaller than shade 7 and having a lateral surface pervious to light, and is displaced with respect to shade 7 in a predetermined direction - in the example shown, coincident with a common axis of symmetry A of shade 7 and screen 20, which are mounted coaxially, with screen 20 inside shade 7.
  • diffusing screen 20 is also made of glass, is fitted inside shade 7 so as to be displaced axially downwards with respect to base 8 and so occupy only the bottom part of the volume of shade 7, and comprises a coloured filter 21 formed integrally with (or carried by) diffusing screen 20, and defined, for example, by appropriate colouring of the glass of which screen 20 is made, or by a film applied to the lateral surface of screen 20.
  • device 1 also comprises a carriage 25 integrally supporting lamp-holder device 4 and mounted to run along guide means 26, which are fitted integrally to support 2 and are defined, in the example shown, by three rods 26 (only one shown in Figures 1 and 2) fitted to and projecting downwards from flanged member 9 of support 2, and arranged in a ring so as to extend, inside shade 7, parallel to axis of symmetry A.
  • carriage 25 comprises a dead-end sleeve 28 engaging rods 26 in sliding manner; and an elastically deformable member 27 defined by a steel rod bent into a U, and fitted to and projecting from a flanged end 29 of dead-end sleeve 28, with the concavity facing the concavity of dead-end sleeve 28.
  • dead-end sleeve 28 receives part of lamp-holder device 4, the rest of which, together with bulb 6, being housed inside the bend defined by the concavity of U-shaped rod 27, which is fitted coaxially to dead-end sleeve 28 by means of flexible L-shaped ends 30 of the rod engaging respective through lateral holes in sleeve 28.
  • Rod 27 extends further along axis A than shade 7, so that, in use, a curved end 27a of U-shaped rod 27 projects from shade 7 to define user gripping and control means, as described later on.
  • U-shaped rod 27 is provided externally with two V-shaped bends 31, which, in use, define stop means cooperating with a stop ring 33 fitted integrally to respective bottom ends 34 of rods 26 opposite body 11.
  • ring 33 comprises two connectable elements by which the ring engages the top minor base of truncated-cone-shaped screen 20, which is thus gripped between stop ring 33 and the lateral wall of shade 7, with a bottom peripheral edge of screen 20 resting on the lateral wall of the shade.
  • sleeve 28 is fitted externally with respective plugs 38 made of low-friction material, retained by ring nuts 39, and by which sleeve 28 engages rods 26 in sliding manner.
  • carriage 25 is therefore movable selectively, along axis A, between a first limit position wherein lamp-holder device 4 is housed partly inside diffusing screen 20, the flanged end 29 of dead-end sleeve 28 rests by force of gravity on stop ring 33, and bulb 6 is located along axis A in the position shown by the dash line in Figures 1 and 2 and housed entirely inside screen 20, which intercepts the light emitted by the bulb; and a second limit position (shown by the continuous line in Figures 1 and 2) wherein lamp-holder device 4 is housed inside body 11, bulb 6 is located, along axis A, inside shade 7 and axially outside diffusing screen 20, which therefore does not intercept (i.e. does not let through) the light e
  • lead portion 12 is housed loosely inside the cavity of body 11, and is longer than the travel of carriage 25 between the first and second limit position.
  • Device 1 operates as follows. When carriage 25 is set to the second limit position shown in Figures 1 and 2, the light emitted by bulb 6 is almost entirely intercepted by shade 7; the downward-directed light portion is mostly reflected by screen 20; device 1, when bulb 6 is turned on, generates a diffused light, which is emitted through shade 7; and screen 20 inside shade 7 is invisible through shade 7, whether bulb 6 is on or off.
  • the user may switch to the first limit position by simply gripping and pulling down on end 27a, which increases the pressure of bends 31 on ring 33 (formerly limited to the weight of carriage 25 and lamp-holder device 4) to flex rod 27 inwards; bends 31 thus slip through the inside of ring 33; and carriage 25 drops down by force of gravity into the first limit position with sleeve 28 resting on ring 33.
  • bulb 6 is housed entirely inside screen 20, which therefore intercepts practically all the light emitted by the bulb; part of the light is reflected downwards, and part travels through screen 20 to acquire the colour of filter 21 and illuminate shade 7, so that device 1 generates, simultaneously, a strong localized light directly beneath shade 7, and a diffused coloured light through shade 7, thus resulting in a pleasant and surprising aesthetic effect.
  • Carriage 25 is restored to the second position by simply gripping and pushing end 27a upwards to flex rod 27 and slip bends 31 back up through ring 33.
  • carriage 25 may be set selectively to a number of intermediate positions between the two limit positions described, thus providing for various intermediate light settings of device 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP01106835A 2000-03-17 2001-03-19 Dispositif d' éclairage à diffusion variable Withdrawn EP1134483A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20000167 IT249782Y1 (it) 2000-03-17 2000-03-17 Dispositivo di illuminazione a diffusione di luce variabile
ITMI000167U 2000-03-17

Publications (2)

Publication Number Publication Date
EP1134483A2 true EP1134483A2 (fr) 2001-09-19
EP1134483A3 EP1134483A3 (fr) 2002-04-03

Family

ID=11443879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106835A Withdrawn EP1134483A3 (fr) 2000-03-17 2001-03-19 Dispositif d' éclairage à diffusion variable

Country Status (2)

Country Link
EP (1) EP1134483A3 (fr)
IT (1) IT249782Y1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH203540A (de) * 1938-09-06 1939-03-15 Huser & Cie Geb Vorrichtung zum Verstellen der Fassung für eine Glüh- oder Metalldampflampe an elektrischen Beleuchtungskörpern.
US3808419A (en) * 1971-10-04 1974-04-30 Jack N Mccarthy Threaded bulb cover device
FI51250C (fi) * 1976-01-08 1976-11-10 Tarmo Aatos Nykaenen Menetelmä liikuteltavien varjostinosien liikuttamiseksi väri- ja/tai k uviosäädettäviin valaisimiin.
US4729065A (en) * 1987-04-24 1988-03-01 Arriflex Corporation Photography light
DE19711744A1 (de) * 1996-05-26 1998-01-15 Ayal Rosin Leuchte mit verstellbarem Schirm und dafür verwendeter Halterung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
IT249782Y1 (it) 2003-05-28
ITMI20000167V0 (it) 2000-03-17
ITMI20000167U1 (it) 2001-09-17
EP1134483A3 (fr) 2002-04-03

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