Lighting apparatus

• US 7,222,997 B2
• Filed: 09/06/2005
• Issued: 05/29/2007
• Est. Priority Date: 09/06/2001
• Status: Expired due to Term

• Current Assignee: Harman Professional Denmark ApS. (Samsung Electronics Co. Ltd.)
• Original Assignee: Martin Professional A/S (Samsung Electronics Co. Ltd.)
• Inventors: Glavind, Mads, Rasmussen, Niels Jorgen
• Primary Examiner(s): Husar; Stephen F
• Application Number:
  US11/220,511
• Publication Number:
  US 20060034089A1
• Time in Patent Office: 630 Days
• Field of Search: 362/398, 362/433, 362/434, 362/457, 362/458, 359/903, 359/827, 359/830, 359/892, 353/97
• US Class Current: 362/398
• CPC Class Codes: F21S 10/007 using rotating transparent or colored disks, e.g. gobo wheels
• CPC Class Codes: F21V 11/14 with many small apertures
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios
• CPC Class Codes: Y10S 359/903 with magnet
• CPC Class Codes: Y10S 362/811 Psychedelic lighting

Abstract

Lighting apparatus includes an effect wheel which is mounted on a rotation mechanism. The rotation mechanism is mounted on a mechanism which moves the effect wheel from a position outside of the light path to a position in which the effect wheel intersects the light path to provide a continuous wheel effect. The translation mechanism can move the effect wheel between positions in which the effect wheel crosses the light path in a horizontal direction and in a vertical direction, respectively. The apparatus allows a continuous wheel effect to be added to a multi-purpose luminaire and also allows the direction of travel of the continuous wheel effect across the illuminated field to be continuously varied.

Claims

1. A lighting apparatus, which lighting apparatus has a light path defined therethrough, the lighting apparatus comprising:

an effect wheel having a rotational centre and an effect region located radially outwardly of the rotational centre, the effect region being configured to alter the visual appearance of a light beam passing therethrough;

a washer of magnetic material bonded to the rotational centre of the effect wheel about its rotational centre;

a rotation mechanism having a drive member and arranged to rotate the effect wheel about the centre, drive member having a magnetic portion arranged to attach to the magnetic washer material, wherein the drive member of the rotation mechanism is removably connected to the rotational centre of the effect wheel for rotation therewith by magnetic attraction; and

at least one locating formation configured to engage with a complementary locating formation on said effect wheel to locate the effect region in position on said fixture.

2. A lighting apparatus having a light path defined therethrough comprising:

an optical component having a rotational centre and an effect region located radially outwardly of the rotational centre, the effect region including an optical portion being adapted to alter the visual appearance of a light beam passing therethrough, the optical component having a metal surface approximate the rotational centre;

a rotation mechanism having a magnetic drive member and arranged to rotate the optical component about the centre, wherein the centre of the optical component is removably connected to the magnetic drive member of the rotation mechanism for rotation therewith by magnetic attraction; and

at least one locating formation engaging a complementary locating formation on the lighting fixture.

3. The lighting apparatus of claim 2, wherein the rotation mechanism includes an electric motor.

4. The lighting apparatus of claim 3, wherein the electric motor is fixed relative to the light path and the rotation mechanism comprises a transmission arrangement arranged to transmit rotational movement of the electric motor to the optical component.

5. The lighting apparatus of claim 2, wherein the optical component is removably mounted on the rotation mechanism.