EP0564828A1 - Device for the variable deflection of a light beam particularly for floodlights - Google Patents

Device for the variable deflection of a light beam particularly for floodlights Download PDF

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Publication number
EP0564828A1
EP0564828A1 EP93103654A EP93103654A EP0564828A1 EP 0564828 A1 EP0564828 A1 EP 0564828A1 EP 93103654 A EP93103654 A EP 93103654A EP 93103654 A EP93103654 A EP 93103654A EP 0564828 A1 EP0564828 A1 EP 0564828A1
Authority
EP
European Patent Office
Prior art keywords
mirror
respect
light beam
movable part
floodlights
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Withdrawn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
EP93103654A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bruno Dedoro
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.)
Coemar SpA
Original Assignee
Coemar 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 Coemar SpA filed Critical Coemar SpA
Publication of EP0564828A1 publication Critical patent/EP0564828A1/en
Withdrawn legal-status Critical Current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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • the present invention relates to a device for the variable deflection of a light beam particularly for floodlights.
  • the aim of the present invention is to eliminate or substantially reduce the drawbacks described above and others in known types of floodlights by providing a device for the variable deflection of a light beam particularly for floodlights, which eliminates the problems linked to the maintenance of said floodlight.
  • an object of the present invention is to provide a variable deflection device which allows to use floodlights of any size and light power.
  • Another object of the present invention is to provide a device for the variable deflection of a light beam particularly for floodlights which is relatively easy to manufacture and at competitive costs.
  • a device for the variable deflection of a light beam particularly for floodlights characterized in that it comprises a frame which can be mounted on a floodlight, said frame having a fixed part and a movable part, said movable part being rotated with respect to said fixed part by first transmission means and supporting a first mirror and a second mirror, said first mirror crossing the light beam which leaves said floodlight and being inclined with respect to the direction defined by said light beam, said second mirror being spaced from said first mirror and being inclined with respect to the light beam which leaves said first mirror, said second mirror being rotatable with respect to said first mirror.
  • a device for the variable deflection of a light beam particularly for floodlights comprises a frame 1 which can be mounted on a floodlight, designated by the reference numeral 2.
  • the frame 1 has a fixed part 3b and a movable part 3a.
  • the movable part is rotated with respect to the fixed part by first transmission means and supports a first mirror 4 and a second mirror 5.
  • the first mirror 4 crosses the light beam, designated by the lines with arrows in the above figures, which leaves the floodlight 2, and is inclined with respect to the direction defined by said light beam.
  • the second mirror 5 is spaced from the first mirror 4 and is inclined with respect to the light beam which leaves the first mirror 4.
  • the second mirror 5 is rotatable with respect to the first mirror 4 by virtue of second transmission means.
  • the first transmission means comprise a first motor 6 which is supported by the fixed part 3b; a first sprocket 8 is rigidly coupled on the shaft 7 of said motor 6; a first toothed belt 9 engages on the first sprocket 8 and on a first ring gear 10 rigidly coupled to the movable part 3a.
  • the second transmission means comprise a second motor 11 which is supported by the fixed part 3b; a second sprocket 13 is rigidly coupled, on the shaft 12 of said motor 11.
  • a second toothed belt 14 engages the second sprocket 13 and a second ring gear 15 which is rigidly coupled to the movable flange 21 of the movable part 3a.
  • a third toothed belt 35 engages a third ring gear 17 defined on the movable flange 21 of the movable part 3a and engages, by being driven by transmission and angular redirection sprockets 18, a fourth ring gear 19 defined on the tubular element 30 which is rigidly coupled to the second mirror 5; the tubular element 30 is rotatable with respect to the movable part 3a.
  • the movable part 3a comprises a movable flange 21 for coupling to the fixed part 3b.
  • the movable flange 21 has, on its external surface, an accommodation seat for a first bearing 22 for coupling to the fixed part 3b.
  • the first bearing 22 is fixed to the fixed part 3b by means of a plate 23, a bearing seating ring 24 and fixing means such as for example screws 40 and the like.
  • a ridge 36 also rises from the external lateral surface of the movable flange 21, and the second ring gear 15 is defined thereon. Adjacent to the ridge 36 there is a second bearing 25 on which a ring 27, for the coupling of a frame 28 for supporting the first mirror 4, is engaged.
  • Locking rings 26 are arranged externally and adjacent to the bearings 22 and 25 and prevent unwanted longitudinal movements of the movable part 3a with respect to the fixed part 3b.
  • the third ring gear 17 is also defined on the external surface of the movable flange 21 and externally with respect to the second bearing 25, whereas the sprockets 18 are rotatably anchored to the frame 28.
  • the supporting frame of the first mirror 4 comprises a shaped frame 28 within which said mirror 4 is fixed.
  • the frame 28 is connected, by means of screws 37 or the like, to the coupling ring 27 on which the first ring gear 10 is defined, as more clearly shown in figure 4.
  • the frame 28 is provided with a hole 29 in which a support for the second mirror 5 is accommodated.
  • Said support comprises a tubular element 30 and a yoke 31.
  • the tubular element 30 fits inside the hole 29 and is coupled to a third bearing 32, which is fixed to a bearing seating ring 33 fixed to the frame 28.
  • Locking rings 34 are provided in order to prevent unwanted longitudinal movements of the tubular element 30 with respect to the frame 28.
  • the fourth ring gear 19 is defined on the external surface of the tubular element 30.
  • the yoke 31 is fixed to the tubular element 30 externally with respect to the frame 28 and supports the second mirror 5.
  • Operation is as follows: if only the first motor 6 is activated, then the frame 28 is rotated with respect to the axis defined by the direction of the light beam and entrains both mirrors 4 and 5 in its rotation. In this case, however, the second mirror 5 moves with respect to the first mirror 4.
  • the movable flange 21 is rotated and transmits its rotary motion to the tubular element 30 by means of the kinematic train constituted by the third ring gear 17, by the third toothed belt 35, by the sprockets 18 and by the fourth ring gear 19, i.e. it rotates the yoke 31 and thus the second mirror 5.
  • the choice of the kinematic train is advantageously made in the described manner in order to avoid turning a motor and thus causing a mechanical imbalance of the moving parts.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
EP93103654A 1992-03-12 1993-03-08 Device for the variable deflection of a light beam particularly for floodlights Withdrawn EP0564828A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI920584A IT1254274B (it) 1992-03-12 1992-03-12 Dispositivo di deviazione variabile di fascio luminoso particolarmente per riflettori
ITMI920584 1992-03-12

Publications (1)

Publication Number Publication Date
EP0564828A1 true EP0564828A1 (en) 1993-10-13

Family

ID=11362411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103654A Withdrawn EP0564828A1 (en) 1992-03-12 1993-03-08 Device for the variable deflection of a light beam particularly for floodlights

Country Status (2)

Country Link
EP (1) EP0564828A1 (it)
IT (1) IT1254274B (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005530A1 (en) * 1994-08-08 1996-02-22 Reliance Electric Industrial Company Apparatus for positioning an optical line of sight within a hemispheric region
US5696637A (en) * 1994-08-08 1997-12-09 Reliance Electric Industrial Company Apparatus for positioning an optical line of sight within a hemispheric region
WO1999041544A1 (en) * 1998-02-13 1999-08-19 Wynne Willson Gottelier Limited Beam steering apparatus
WO2003050593A2 (en) * 2001-12-10 2003-06-19 Wynne Willson Gottelier Limited Improved projection device
DE102011103704A1 (de) * 2011-05-31 2012-12-06 Dirk Wortmeyer Leuchte mit verstellbarer Abstrahlrichtung
ITMI20121061A1 (it) * 2012-06-18 2013-12-19 Clay Paky Spa Proiettore da palcoscenico, in particolare proiettore seguipersona da palcoscenico
US11181252B2 (en) 2018-10-09 2021-11-23 Michael Callahan Apparatus for steering a light beam using two mirrors having only one mirror moved

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226428A2 (en) * 1985-12-06 1987-06-24 Economair Pancan Limited Beam-scanning device
EP0266484A2 (en) * 1986-11-03 1988-05-11 Altman Stage Lighting Co.,Inc. New York Corporation Low-inertial beam direction lighting system
EP0345030A2 (en) * 1988-06-01 1989-12-06 STRAND LIGHTING INC (a New Jersey corporation) Two-axis beam steering system for use in automated light fixtures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226428A2 (en) * 1985-12-06 1987-06-24 Economair Pancan Limited Beam-scanning device
EP0266484A2 (en) * 1986-11-03 1988-05-11 Altman Stage Lighting Co.,Inc. New York Corporation Low-inertial beam direction lighting system
EP0345030A2 (en) * 1988-06-01 1989-12-06 STRAND LIGHTING INC (a New Jersey corporation) Two-axis beam steering system for use in automated light fixtures

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005530A1 (en) * 1994-08-08 1996-02-22 Reliance Electric Industrial Company Apparatus for positioning an optical line of sight within a hemispheric region
US5696637A (en) * 1994-08-08 1997-12-09 Reliance Electric Industrial Company Apparatus for positioning an optical line of sight within a hemispheric region
US5734515A (en) * 1994-08-08 1998-03-31 Reliance Electric Industrial Company Apparatus for positioning an optical line of sight within a hemispheric region
WO1999041544A1 (en) * 1998-02-13 1999-08-19 Wynne Willson Gottelier Limited Beam steering apparatus
US6464376B1 (en) 1998-02-13 2002-10-15 Wynne Willson Gottelier Limited Beam steering apparatus
WO2003050593A2 (en) * 2001-12-10 2003-06-19 Wynne Willson Gottelier Limited Improved projection device
WO2003050593A3 (en) * 2001-12-10 2003-07-17 Wynne Willson Gottelier Ltd Improved projection device
DE102011103704A1 (de) * 2011-05-31 2012-12-06 Dirk Wortmeyer Leuchte mit verstellbarer Abstrahlrichtung
ITMI20121061A1 (it) * 2012-06-18 2013-12-19 Clay Paky Spa Proiettore da palcoscenico, in particolare proiettore seguipersona da palcoscenico
WO2013190473A1 (en) * 2012-06-18 2013-12-27 Clay Paky S.P.A. Stage light fixture, in particular stage follow spot
US9683722B2 (en) 2012-06-18 2017-06-20 Clay Paky S.P.A. Stage light fixture, in particular stage follow spot
US11181252B2 (en) 2018-10-09 2021-11-23 Michael Callahan Apparatus for steering a light beam using two mirrors having only one mirror moved
US11761610B2 (en) 2018-10-09 2023-09-19 Michael Callahan Twist-lock plug improved to positively lock with prior art receptacles

Also Published As

Publication number Publication date
ITMI920584A1 (it) 1993-09-12
ITMI920584A0 (it) 1992-03-12
IT1254274B (it) 1995-09-14

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