DE60129048T2 - lighting - Google Patents

Abstract

A lighting fixture (1) projects a light beam for spot lighting in theater stages, cinema and television studios and the like. The fixture includes a light source (20) at one end of a housing (25) having a light beam exit aperture (24) at the opposite end thereof, the light source and aperture being arranged generally concentric with a longitudinal or optical axis (19) of the lighting fixture. One or more beam-shaping blades (30,31,32,33), and preferably also other light beam influencing elements, such as one or more lenses (22,23), an iris (28), and/or a pattern or gobo (29), are arranged along the path of the light beam along the longitudinal axis through the housing from the light source to the aperture. The position of the beam-shaping blade or blades, and preferably of all the light beam influencing elements, is adjustable relative to the longitudinal axis. The fixture produces a well-defined light beam or light cone with a geometry, angle of conicity and focal point that may be altered manually or by remote control.

Description

• – eine Lichtquelle, die an einem Ende eines Gehäuses angeordnet ist, mit einer Lichtstrahlaustrittsöffnung am gegenüberliegenden Ende des Gehäuses, wobei die Lichtquelle und die Öffnung allgemein konzentrisch zu einer Längs- oder optischen Achse des Beleuchtungskörpers angeordnet sind;
• – Lichtstrahlbeeinflussungsmittel, die mindestens ein oder mehrere, vorzugsweise vier, Strahlformungslamellen umfassen und vorzugsweise noch weitere Lichtbeeinflussungsmittel wie zum Beispiel eine oder mehrere Linsen und/oder eine Blende und/oder ein Muster oder einen Linsenschirm zur Beeinflussung eines Lichtstrahls, der von der Lichtquelle ausgeht, umfassen und die entlang des Weges des Lichtstrahls entlang der Längsachse durch das Gehäuse hindurch von der Lichtquelle zu der Öffnung angeordnet sind, und
• – Einstellmittel zum Verstellen der Position von mindestens der einen oder der mehreren Strahlformungslamellen und vorzugsweise eines jeden der Beeinflussungsmittel relativ zu der Längsachse.

The present invention relates to a lighting fixture for projecting a light beam and for use as a spotlight in the context of theatrical stages, cinemas and television studios and the like, the lighting fixture comprising:

• A light source disposed at one end of a housing having a light beam exit opening at the opposite end of the housing, the light source and the opening being generally concentric with a longitudinal or optical axis of the lighting fixture;
• Light beam influencing means which comprise at least one or more, preferably four, beam shaping blades and preferably also other light influencing means, for example one or more lenses and / or a diaphragm and / or a pattern or a lens screen for influencing a light beam emanating from the light source, and arranged along the path of the light beam along the longitudinal axis through the housing from the light source to the opening, and
• Adjusting means for adjusting the position of at least one or more beam shaping blades and preferably each of the biasing means relative to the longitudinal axis.

Of the Purpose of a lighting fixture according to the above Definition is the generation of a well-defined light beam or light cone with a geometry, a cone angle and a Focal point that can be changed manually or remotely. One lighting usually includes a light source, a reflector, a beam shaping window with beam shaping blades, a pattern or a lens screen, a diaphragm, a focusing lens, a zoom lens and a color filter and a suspension construction, which allows a vertical and horizontal pivoting of the lighting fixture.

Of the visible part of the light emitted by the light source becomes bundled by the reflector and towards the aperture, lens screen and beam shaping window emitted as a parallel beam of light. The infrared part of the radiation from the light source through the dichroic coating of the reflector and meets the inner surface the housing surrounding the light source, wherein the heat to Outside surface of the housing is transported with cooling fins is provided to the heat to radiate into the environment.

It Often it is necessary to determine the geometry of the light beam can. This is achieved with the help of the zoom lens, the cone angle the light cone changes, and by shaping or trimming the edge of the light beam by means of of the beam-shaping window with beam-shaping blades, around geometric To obtain figures such as squares, triangles, trapezoids and so on. The lenses project the light through the opening of the housing opposite the Light source and through the color filter at the front end of the lighting fixture outside. It It is important that the different elements, the shape and affect other characteristics of the light beam, as precise as possible to work even if they are subject to the influence of heat, that of the Light source is emitted and not by means of the dichroic Reflector is removed. That means the position and the configuration the adjusting means for the beam shaping blades, the lens screen and the diaphragm so chosen are that any bending, that by the influence of the heat of caused by the light beam is kept as low as possible.

Lighting fixture this Type are often arranged in places where it is difficult to hand she approaches, which is why it is exceedingly It is important that the adjustment means for adjusting the above Beam influencing means as simple as possible accessible and as possible are flexible when manual operation of the adjustment required is.

U.S. Patent No. 5,345,371 discloses a lighting fixture of the type in question, in which the four beam shaping fins or shutters can be inserted into slots from the outside, wherein the shutters can be radially adjusted by grasping a holder for each closure and the closure along the - or relative to the - optical axis shifts. The closures can also be tilted manually to some degree. However, a further tilting possibility is achieved by allowing the portion of the lighting fixture containing the shutters to be rotated as a unit about the axis. This is a complicated solution and requires accessibility of all holders of the closures by hand and handling of the rotating means for rotating a part of the lighting fixture. A motorization for a remote control of this design is very complicated and expensive.

U.S. Patent No. 4,890,208 discloses a lighting fixture of the type in question, where four motorized displacement shutters are disposed radially in the optical axis direction and motorized tilt by means of rack and pinion mechanisms. This solution is complicated and has only a limited ability to tilt, ie Ver Shuttability, circumferentially around the axis. Furthermore, this solution is not well suited for manual operation.

U.S. Patent No. 4,210,955 however, discloses a lighting fixture substantially as defined in the preamble of claim 1 of the present document.

It It is an object of the present invention to provide a lighting fixture of the designated type, the access for a manual activity is convenient and does not depend on the orientation of the lighting fixture, with a Motorization for a remote control done in a simple and reliable way can be and where the range of displacement in the circumferential direction around the optical axis is as large as possible.

According to the invention This task is performed by at least the adjustment means that the correspond to one or more beam shaping fins, and preferably achieved by all adjustment means that turn for one around the longitudinal axis are arranged and so with a respective influencing means are connected, that a rotation of the adjusting means about the longitudinal axis the position of the respective influencing means relative to the longitudinal axis adjusted, and an annular body which is arranged so that its axis substantially coincides with the longitudinal axis, and the annular body includes an outer edge, which is engaged to apply a torque to it, the surface of the outer edge with a friction enhancing agent such as a roughening agent, a rubber coating, projections or teeth is. This is a manual operation and a remote controlled confirmation the adjusting particularly simple and efficient.

advantageously, includes the lighting fixture Furthermore, one or more electric motors with a respective Drive are connected to the outer edge of a respective annular body in Engages to exert a rotational force on it, the drive wheel is preferably a gear and the respective outer edge, which is engaged by a respective gear, with tooth is provided, which is with the teeth the gear mesh when the gear rotates.

to Use in the remote control of the lighting fixture with predetermined positions of the light influencing means is it is advantageous that the annular body is provided with a position indicating means to the angular position of the annular body relative to the longitudinal axis display. This is a reference point for the remote control operation to disposal, whereby errors and inaccuracies are excluded.

advantageously, the position indicating means comprises an element suitable for remote detection, such as a magnet or a gap, and the lighting fixture comprises Furthermore, a remote detection means for detecting the angular position of the element relative to the longitudinal axis.

Around the largest adjustment flexibility and the largest adjustment range to obtain the adjustment means for each of the one or more Beam shaping blades radial adjusting means for adjusting the Position of the blade radially relative to the axis and in the circumferential direction acting adjustment means for adjusting the position of the lamella in the circumferential direction about the axis.

A particularly simple and efficient as well as accurate embodiment of the lighting fixture according to the invention is provided by the setting means for each of one or more beam forming blades two adjacent concentric annular body or rings, each connected to one point of the lamella are that a relative rotation of the two rings the radial position the slat changes.

In of the presently preferred embodiment the rings guide troughs, in the side surface each ring, which faces the other ring, are embedded, and each lamella comprises a body, which extends substantially transverse to the axis, and two arms, which extend generally parallel to the axis, the Anne are each provided with sliding connection means to the to connect each arm with each of the rings, and configured for it are, sliding in a guide trough to be recorded in each of the rings.

in the Below, the invention will be described in more detail in connection with preferred embodiments a lighting fixture according to the invention explains described by way of example only with reference to the accompanying drawings and in which:

1 Figure 3 is an isometric elevation of a lighting fixture according to the invention for manual operation.

2 is a partially cutaway view of the flush body in FIG 1 which illustrates the internal configuration of the light tube body.

3 is a schematic cross-sectional view of the illumination of the 1 and 2 along a vertical plane containing the longitudinal or optical axis of the lighting fixture.

4 is an enlarged scale view of the left-side part of 3 ,

5 is an isometric elevation of the lower half of the frame of the lighting fixture of 1 and 2 ,

6 is an exploded view of the beam shaping blades and adjusting rings of the lighting fixture in the 1 and 2 ,

7 is an axial end view of in 6 shown lamellae and rings in a nested state.

8th and 9 are schematic axial end views corresponding 7 , which the adjustment of the beam-shaping blades of the 6 - 7 illustrate.

10 is an illustration of the design principles of the guide grooves in the adjusting rings for the beam shaping blades.

11 schematically illustrates an alternative embodiment of the beam shaping blades and their adjustment mechanisms.

12 shows an isometric, partially exploded scale enlarged view of Positionsverstellmechanismus' for in 2 shown lenses.

13 shows an enlarged view of a detail of the in 12 shown construction.

Let us now turn to that 1 - 5 to. A lighting fixture 1 according to the invention is in a suspension bracket 2 hung an opening 3 has to the holder 2 pivotally mounted on a support structure, not shown, in a theater, a television studio or the like. The holder 2 is pivotable at 4 on the body of the lighting fixture 1 attached, wherein the mounting point can be adjusted by the pivot mounting point 4 in a slot 5 in a frame 6 shifts to compensate for a change in balance caused by the insertion or removal of various elements in the lighting fixture 1 or from the lighting fixture 1 is caused.

The lighting fixture 1 Thus, it can be pivoted manually about two mutually substantially orthogonal axes, whereby a light beam emitted by the lighting body can be directed in any desired direction.

If required is to be able to control the direction of the beam remotely, so the pivoting movement by remote-controlled electric motors in many different ways be done for the person skilled in the art are obvious.

The frame 6 is generally U-shaped, has two arms and carries the body of the lighting fixture 1 between the poor. A series of toothed edges 7 - 18 is for rotation about a longitudinal or optical axis 19 arranged (see 3 ). The teeth of the toothed edges are configured so that the teeth of a pinion of a drive unit can engage and interlock with them as the light beam influencing means of the lighting fixture caused by the rotation of the bodies 7 - 18 be actuated to be motorized for remote control.

In the in the 1 - 4 In the manually operated embodiment shown, the teeth of the serrated edges serve as a roughening element of the surface of the rim of each of the annular bodies 7 - 18 in such a way that a good frictional engagement between the fingers of a hand and the toothed edges or annular body 7 - 18 can be made to the annular body 718 to turn by hand.

A Such roughening of the edge surface can can also be achieved in many other ways, such as through Grooving on the surface or coating with rubber or incorporating small protrusions, etc.

In such a case, and if a motorization of the rotation of the body 7 - 18 is desired, frictional surface engagement of, for example, the surface of a rubber-coated driving wheel driven by an electric motor with the roughened edge surface, may be made instead of meshing the teeth of a pinion with teeth of the rim of the annular body.

A light source or lamp 20 emits a beam of light that consists of individual light rays, such as at 20a illustrates, with their visible portion of a dichroic reflector 21 through a focusing lens 22 and a zoom lens 23 and out of the lighting fixture through an opening 24 in the case 25 of the lighting fixture 1 is reflected, the light beam 20a passing through a color filter, not shown, passing through four color filter holders 26 at ordered, which is around swivels 27 can be pivoted around, making a color filter in each of four directions, passing through the four holders 26 are given in the holder 26 used and out of the holders 26 can be taken out. This allows the color filter to be at the best angle for manual access to a specific orientation of the housing 25 be inserted and removed. Of course, the entire beam of light projected through the lighting fixture consists of several light beams analogous to the single light beam 20a ,

The infrared portion of the light beam 20a is in a familiar to the skilled person through the dichroic reflector 21 through to Kühlrip pen 22 transferred to reduce the thermal deformation of elements along the path of the light beam from the light source 20 to the exit opening 24 are arranged.

These elements include a bezel 28 that with the annular body 7 connected, a pattern or a lens screen 29 that with the annular body 8th is connected, four beam shaping blades 30 . 31 . 32 and 33 that with the pairs of annular bodies 9 - 10 . 11 - 12 . 13 - 14 respectively. 15 - 16 are connected, the focusing lens 22 that with the annular body 17 connected, and the zoom lens 23 that with the annular body 18 connected is.

The annular body or rings 7 - 18 are in different ways with the respective light beam influencing elements 22 . 23 and 28 - 33 connected so that the position of these elements relative to the axis 19 , and thus the light beam, can be changed by rotating the rings about the axis. The individual connections between the individual rings and the respective elements are described in more detail below.

The feature of the possibility of the position of the light influencing elements and in particular the Lichtstrahlformungslamellen 30 - 33 By rotating the respective rings, manual execution allows a change in position from a convenient angle of access to a particular orientation of the housing 25 , Because the edge surface of each of the rings 7 - 18 can be manually engaged over most of its circumference, the manual adjustment of the position of a respective light beam influencing element from the most convenient angle of access to the housing 25 out. Furthermore, manual adjustment can be performed with one hand, which is important because the lighting fixture is often positioned so that access with both hands is difficult and perhaps even impossible.

hereby has the lighting fixture according to the invention not the disadvantages of known lighting fixtures, where the adjusting means for adjusting the position of a light beam shaping fin very unfavorable with regard to the position of the person operating the lighting fixture, are arranged so that the person around, for example, around the lighting fixture housing must reach to access the adjustment means, and thereby Danger is in the hot Burn housing surface, what a fast and accurate Position adjustment difficult and maybe even impossible.

This Advantage can also by means of other means of rotation than rings with a edge surface be realized for manual or mechanical intervention. Elements with several radially extending, circumferentially from each other Spokes spaced at the ends by the fingers of one Hand or a motorized drive means engaged can, can also be used. A circumferentially arranged Endless belt, for a substantially circular one Movement around the longitudinal axis can also be used instead of the illustrated rings be used. It can all means having access along a large part of the perimeter of the housing and a rotational frictional engagement by fingers or a motorized Drive unit allow to be used to such a convenient Allow access to the adjustment means to change the position of the beam influencing elements.

The Characteristic of changing the position of the light influencing elements by means of rotation mean also a simple and reliable Achievement of a certain attitude of a respective influencing means, such that preprogrammed settings for certain Lighting requirements can be established, knowing that it's easy, fast and reliable is done, such settings either manually or off to reach the distance in difficult conditions, for example in the course of a theatrical performance, where adjustments have to be done in the dark.

A further advantage is realized by means of the construction according to the invention in that thanks to the construction no light can leave the interior of the lighting fixture except through the opening 24 and all adjustments of the light beam influencing elements can be carried out without creating a slit or aperture through which light can exit. As a result, the disadvantage of all known lighting fixtures is eliminated, that light unintentionally exits at other locations, which is of great use, in special when used in the theater.

Let's go back to that 1 - 5 to. The frame 6 consists of two identical halves 6a and 6b that at 6c abut. The rings or annular body 7 - 18 are rotatable and sliding in annular grooves 34 in annular support rings 35 by means of annular projections or elevations 36 mounted, sliding in the annular grooves 34 are included. The support rings 35 each consist of a half ring, attached to one half of the frame 6 , for example 6a attached or integral with one half of the frame 6 , for example 6a , is formed (see 1 ). In other words, each of the frame halves 6a and 6b is on a series of half rings 35 attached or integral with a series of half rings 35 trained as in 5 shown, the lower half 6b of the frame 6 with the corresponding half rings 35 is shown.

When assembling the lighting fixture 1 become the adjusting rings 7 - 18 with corresponding beam influencing elements 22 . 23 and 28 - 33 in the lower half 6b of the frame with corresponding half rings 35 arranged such that the increase 36 each adjusting ring in the corresponding groove 34 of the respective half ring 35 the lower frame half 6b is recorded. After that, the top half 6a of the frame 6 with corresponding half rings 35 at 6c against the lower half 6b thrusting arranged such that the increase 36 each adjusting ring in the corresponding groove 34 of the respective half ring 35 the upper frame half 6a is recorded. The adjusting rings 7 - 18 thus become slidable and rotatable along their entire circumference through the respective rings 35 supported.

Each of the adjusting rings or annular body 7 - 18 can then be rotated manually or by suitable mechanical means by a tangential force is applied to the edge of the respective adjusting ring, whereby its increase 36 in the respective annular groove 34 of the respective support ring 35 slides. The material of the raises 36 and the grooves 34 is chosen so that the sliding friction resistance is kept as low as possible. The support rings 35 can be made of cast aluminum, and the adjusting rings can be made of glass fiber reinforced plastic. The raises 36 are made of a low-friction material such as Teflon, wherein a ring of this material is embedded in the side surface of the corresponding adjusting ring. As a result, the Gleitreibungswiderstand between the low-friction material and the cast aluminum is low, and the adjusting rings can thus be rotated by applying a relatively small tangential force to its edge.

Each of the pairs of adjusting rings 9 / 10 . 11 / 12 . 13 / 14 and 15 / 16 carries a respective Lichtstrahlformungslamelle 33 . 32 . 31 respectively. 30 by means of arm pairs 33a , b, 32a , b, 31a , b or 30a , b, which are held by the Verstellringpaare in a manner which will be described in more detail below. So that the two rings of each ring pair can rotate relative to each other, is a ring 37 made of low friction material between each pair of adjusting rings, as in the 4 and 6 illustrated.

It will now be referring to the 4 and 6 - 9 the arrangement of the four light beam shaping blades 30 - 33 explained in more detail.

The slats 30 - 33 are like in the 4 . 6 and 7 illustrated inserted into each other, each lamella 30 - 33 through a pair of opposing arms 30a - 33a respectively. 30b - 33b will be carried.

It is important that the slats 30 - 33 axially as close together as possible to achieve a sharp cut-off boundary of the light beam around its entire circumference, which can only be achieved if the louvers are arranged so that there is no appreciable distance between them in the axial direction of the housing.

This is especially good in the 3 and 4 illustrates where it is clear that the distance of the slats in the direction of the axis 19 is low.

The arrangement shown also has the advantage that the axial distance between the beam shaping lamellae 30 - 33 and the aperture 28 as well as the lens screen or pattern 29 so small is that a good sharpness or quality of the influence of the lamellae, the diaphragm and the lens screen on the light beam can be achieved simultaneously thanks to the short axial distance that bridges all these elements.

The slats 30 - 33 are like in the 6 - 8th shaped shown. They have a generally elliptical planar body 38 with an opening 39 having a peripheral edge having a curved portion 40 and linear sections 41 . 42 and 43 comprising, this peripheral edge as the beam cutting edge of the fin body 38 serves. This is in 7 illustrates where the peripheral edges of the openings 39 the four bodies 38 the slats 30 - 33 the peripheral edge of the beam-forming opening 44 define. By a combination of a rotation of the different slats 30 - 33 around the axis 19 with a shift of the slats 30 - 33 radially relative to the axis 19 can be a variety of different forms of opening 44 to reach.

The radial displacement of the individual slats 30 - 33 is in the 8th - 9 illustrated, wherein the peripheral edge portion 42 the slat 33 in 8th with the greatest radial distance from the axis 19 and in 9 with the smallest radial distance from the axis 19 is shown. The rotational shift is achieved by turning the ring pair 9 / 10 that the slat 33 carries to the axle 19 reached. Combinations of the radial and rotational displacement of each blade allow the formation of a wide variety of peripheral edge shapes of the aperture 44 ,

The elliptical shape of the opening 39 was chosen to produce a relatively stiff lamella as well as a continuous and smooth outer circumference of the body. This avoids that the bodies of the slats obstruct each other when they are displaced relative to each other, even if the axial distance of the body is low. To such mutual disability between the bodies as well as between the arm pairs 30a , b- 33a In order to avoid b, it is advantageous that the radial displacement of the bodies occurs in such a manner that there is virtually no flexing of the arms during such displacement, ie that the distance between the ends of the arms of each pair is constant during such displacement and that during such a radial displacement no torsional forces act on the arms.

In the presently preferred embodiment of the invention disclosed in the 1 - 9 is shown, this is achieved as follows.

Each arm is with an angled end section 45 provided a guide pin 46 which extends therethrough and from both opposite surfaces of the angled portion 45 protrudes. The plane of each end section 45 is essentially parallel to the plane of the body 38 the respective lamella.

The rings of each ring pair, for example 15 and 16 in 6 or 9 and 10 in 8th - 9 , are identical, and a side surface of each ring is with a recessed, circumferentially extending groove 47 at the bottom of an annular, circumferentially extending recess 48 and with an elongated, radially extending groove 49 in the bottom of an annular, circumferentially extending recess 50 that with the recess 48 is identical and diametrically opposite the recess 48 is arranged provided.

The two rings 15 . 16 in 6 and the two rings 9 . 10 in the 8th and 9 are arranged abutting one another, with their side surfaces coinciding with the recesses 48 and 50 are provided, facing each other, such that the recess 48 of the ring 15 (Ring 9 ) of the recess 50 of the ring 16 (Ring 10 ) and is located above it and the recess 50 of the ring 15 (Ring 9 ) of the recess 48 of the ring 16 (Ring 10 ) and is over her. As a result, who the annular channels 51 for receiving the angled end portions 45 Anne's made when a couple's rings 9 / 10 . 11 / 12 . 13 / 14 or 15 / 16 be arranged abutting one another.

One of the two protruding ends of each guide pin 46 each end section 45 is in the circumferential groove 47 one ring of a ring pair inserted, while the other protruding end in the radial groove 49 the other ring of the ring pair is inserted.

The geometry of the gutters 47 and 49 is such that when a ring of a ring pair is rotated relative to the other ring of the pair, the respective body 38 the lamella, which is supported by the respective pair of rings, is radially displaced so that the distance between the pins 46 the two arms of the respective lamella remains constant and the arms are not subject to any torsional loads.

In the 8th and 9 is the ring pair 9 / 10 so shown that the ring 9 against the ring 10 butts and lies above him. In the illustration both rings are shown in solid lines to better recognize them and the relative positions of the grooves 47 and 49 to illustrate both rings.

In 8th became the ring 10 rotated by 10 degrees clockwise, such that its gutter 47 that left in 8th shown is rotated 10 degrees clockwise while the ring 9 rotated 10 degrees counterclockwise, leaving its gutter 47 which is right in 8th shown is rotated 10 degrees counterclockwise. Hence the gutter 49 of the ring 10 which is right in 8th shown is rotated 10 degrees clockwise while the gutter 49 of the ring 9 that left in 8th shown is rotated 10 degrees counterclockwise. The angles clockwise and counterclockwise are given relative to a starting position where the body 38 in the middle position between 8th and 9 located. The maximum circumference of the light beam is through the circle 52 shown.

In 9 became the ring 10 turned counterclockwise by 10 degrees, so that its gutter 47 that left in 9 shown at 10 Degree is rotated counterclockwise while the ring 9 wound by 10 degrees clockwise wound, so that its gutter 47 which is right in 9 shown is rotated 10 degrees clockwise. Hence the gutter 49 of the ring 10 which is right in 9 shown is rotated 10 degrees counterclockwise while the gutter 49 of the ring 9 that left in 9 shown is rotated 10 degrees clockwise.

All intermediate positions between the two end positions, which are in the 8th and 9 are shown achieved by turning the rings 9 and 10 relative to each other by the corresponding number of degrees between zero and twenty.

A variety of different beam peripheral shapes can be achieved by the lamellae 30 - 33 be rotated radially by rotating the two rings of the corresponding pair of rings relative to each other and by the lamellae are displaced in the circumferential direction by rotating the two rings of a pair of rings together.

In 7 is one of the infinite combinations of radial and circumferential positions of the four fins 30 - 33 shown, creating a beam 44 is produced with the shown eight-sided polygonal peripheral shape.

To achieve that the distance between the two pins 46 at the ends of the two arms of each of the fins 30 - 33 for all radial displacements of her body 38 the same is and that no torsinn of the Anne takes place, so on the body 38 no deformation forces act, are the shapes of the gutters 47 and 49 configured as described below 10 describes where the construction and calculation of the shapes of the gutters 47 and 49 are illustrated.

In 10 are three pairs of corresponding points on the curves 47 and 49 constructed, with the angles of the better recognizability because of exaggerated.

The construction of the curves is done as follows:
A1 is constant and equal to half the distance between the two pins 48 a lamella.
C2 = A1
Angle 1 = angle 2
Angle 1 + angle 2 = angle 3

Both Triangles are right triangles.

angle 1 is the angle to which ring 1 is set and angle 2 is the angle to which ring 2 is set.

By Turning the ring 1 relative to ring 2 gives the angle 3. A central axis is constructed from the center of the rings and horizontally to the left, such that angle 1 = angle 2.

angle 1 and angle 2 are used to construct the two triangles.

A line is drawn along the central axis, the line being a length equal to half the length between the two pins 46 a slat has.

These Line forms the hypotenuse C2 as well as the triangle side A1, so that the other triangle side B1 can be constructed by using a Line from the right angle pulls down and C1 from the middle outgoing draws until the two lines intersect at a point.

This point is on the curve used for the configuration of the gutter 47 to construct. B1 = SIN (angle 1) × A1 equation 1.1 C1 = A1 / COS (angle 1) Equation 1.2

C1 is now a radius that can be used together with angle 3 to construct the groove using Equation 1.3.
XRinne47 = COS (angle 3) × C1
YRinne47 = SIN (angle 3) × C1

Or Equation 1.2 can be inserted into Equation 1.3.
XRinne47 = COS (angle 3) × (A1 / COS (angle 1))
YRinne47 = SIN (angle 3) × (A1 / COS (angle 1))

The X and Y axes become as in 10 specified constructed for each point.

The gutter 49 in a ring extends in the radial direction to the radial displacement of the corresponding end of the pin 46 absorb, resulting from the geometry of the gutter 47 in the other ring results.

Since it is the intersection point or triangle vertex B1 / C1 that changes its position relative to the center of the rings, the shape of the channel is 47 given by:
XRinne49 = A1 / COS (angle 1)
YRinne49 = 0,
such that the fixed distance between the ends of the pins 46 in corresponding points of the gutters 47 and 49 maintained.

It is immediately clear to the person skilled in the art that it is possible to move the beam-forming lamellae radially and in the circumferential direction by means of rotary rings also to accomplish in other way.

Let us turn now 11 to where schematically an alternative possibility of arranging the beam influencing blades is shown. Two adjusting rings 56 . 57 similar to the adjusting rings 9 . 10 of the 8th and 9 are abutting one another, wherein a beam shaping lamella 60 is arranged between and on the rings by means of two guide pins 61 and 62 is appropriate. The pencil 61 is in a recess in the side surface of the ring 57 that the ring 56 facing, wherein the recess has a shape which is only one turn of the pin 61 allowed therein. The pencil 62 is in a linear groove 63 taken in the side surface of the ring 56 that the ring 57 facing, taken in. The pencil 62 can in the gutter 63 slide.

The situation in which the slat 60 the light beam 52 maximum locks, is shown in solid lines, while the situation in which the slat 60 the beam 52 does not lock, shown in dotted lines. The fully locking position of the slat 60 is changed to its non-blocking position by the ring 56 and the ring 57 rotated relative to each other, for example, as shown, by rotating the ring 56 counterclockwise and holding the ring 57 in the same position. This will make the pen 62 causes, in the gutter 63 to slide while the pen 61 just turn so that the lamella around the pin 61 rotates. In the example shown, a rotation of the ring 56 12 degrees counterclockwise to a rotation of the lamella 60 at 22 degrees.

These Arrangement of the beam shaping blades requires relatively rigid blades and / or a relatively large one axial distance between the individual slats to avoid that the slats interfere with each other or with each other get when they are turned.

Let us now turn to that 2 . 3 . 12 and 13 to where the mechanism for moving the focusing lens 22 and the zoom lens 23 along the longitudinal axis 19 is shown in partially exploded form. The holder 64 for the zoom lens 23 and the holder 65 for the focusing lens 22 are sliding in gutters 66 respectively. 67 arranged in guide rails such that the holder 64 and 65 parallel to the longitudinal axis 19 can be moved back and forth.

A carrier 68 is with each of the holders 64 and 65 connected, with only the carrier 68 for the holder 65 you can see. The carriers are each with a toothed belt 69 respectively. 70 according to the holders 65 respectively. 64 connected. The timing belts are on pulleys 71 and 72 mounted, which rotates on the guide rails 66 . 67 are mounted.

Each of the adjusting rings 17 and 18 (which for better visibility in 12 partially cut away) is with laterally toothed sections 73 respectively. 74 provided to the teeth of the timing belt 69 respectively. 70 to engage, allowing a rotation of the ring 17 back and forth a shift of the belt 69 causes back and forth and a rotation of the ring 18 back and forth a shift of the belt 70 causes back and forth. This allows the lens holder 64 and 65 along the gutters 66 and 67 be moved back and forth by the rings 18 respectively. 17 be turned back and forth.

hereby will be a simpler, more precise and relatively quieter Displacement mechanism for adjusting the position of the lenses along the longitudinal axis reached.

When the lighting fixture 1 aligned so that its axis 19 is steeply inclined, ie steeply pointing up or down, so tends the weight of the lenses, in particular the zoom lens 23 to pull the lens up or down from the desired and adjusted position, especially when the lighting fixture is vibrating. This tendency can be limited or eliminated by incorporating an inertia or braking component into the displacement mechanism.

However, if the inertial component is permanently present and, for example, a constant braking force acts on the timing belts, then displacement of the lens requires the application of additional tangential force at the edges of the rings 17 and 18 , However, this is neither for a manual operation in which the operator has to apply a greater finger force, nor desirable for the motorized operation, for which a more powerful engine is needed, which is associated with higher costs and a greater noise.

The displacement mechanism according to the invention is provided with a braking function which acts only when there is no displacement of the lens; ie the brake function is only in effect when the rings 17 or 18 not be turned. Of course, the principles of the selective braking mechanism according to the invention, as described below, also apply in other applications where displacement of a component is desired with subsequent deceleration of the component in the displaced position.

The selective braking mechanism ( 12 - 13 ) according to the invention comprises the pulley 71 , a locking wheel 90 , one friction 91 , a friction spring 92 , a lock washer 93 and a locking slide 94 ,

The feather 92 pushes the locking wheel 90 and the friction disc 91 against the pulley 71 to get a suitable friction between the locking wheel 90 and the pulley 71 to create.

The locking slide 94 is between the two parallel sections of the toothed belt and for a displacement back and forth in the plane of the toothed belt 70 arranged at right angles to the two parallel sections. The locking slide is with locking teeth 94a and 94b provided to teeth on the edge of Verriege ment wheel 90 ratchet-like in a locking engagement. When the locking slide 94 is in a middle position, ie not in the direction of one of the two parallel sections of the belt 70 is moved, so take the locking teeth 94a and 94b not the teeth of the locking wheel 90 engaged, so no friction braking on the belt 70 acts.

The dimension of the locking slide 94 perpendicular to the parallel sections of the belt 70 is slightly longer than the distance of the common tangents of the pulleys 71 and 72 , such that the locking slide 94 in its middle position against the parallel sections of the belt 70 suppressed.

If, due to the weight of the lens, tension on one of the parallel sections of the timing belt 70 is applied, the section is tightened, and the parallel section is loosened, whereby the locking slide is moved from its center position to a lateral position where the respective one of the locking teeth 94a and 94b the ratchet teeth of the locking wheel 90 engages, causing over the friction disc 91 Friction braking forces on the pulley 71 be filed.

However, if in one of the parallel sections of the belt 70 by a rotation of the ring 18 for the purpose of axial displacement of the holder 64 Voltage is caused, so causes the displacement of the locking slide 94 from its middle position no intervention of one of the locking teeth 94a or 94b with the ratchet teeth of the locking wheel 90 because the ratcheting effect causes the respective locking tooth to "ratchet" over the ratchet teeth.

hereby a selective braking mechanism is achieved, whereby the braking effect occurs when the weight of the lens tries to change the respective adjusting rings However, the braking effect does not occur when a turn of the respective ring is made to move the lens axially.

the Professional shines that the principles of the above selective braking mechanism 'in all applications, where a braking action in a direction of force is needed but not needed in the opposite direction of the force.

The arrangement of the lens screen or pattern 29 in the ring 8th and the aperture 28 in the ring 7 It need not be described herein since it will be apparent to those skilled in the art that this may be done in a variety of ways known in the art.

The skilled person is also clear that for remote control of the adjusting rings an electric motor with a pinion for each ring can be arranged so that the teeth of the pinion mesh with the teeth on the edge of each ring. For example, the motors can be fixed to the frame 6 be mounted or may be so spring preloaded that irregularities in the assembly of the rings and thereby the toothed edges can be accommodated. Magnetic markers may be attached to the rings so that a sensor means can detect the marking and thereby accurately discern the position of the respective ring as a basis for its subsequent rotation to a new setting of the respective beam influencing means.

Claims (7)

Lighting fixture ( 1 ) for projecting a light beam and for use as a spotlight in connection with theaters, cinemas and television studios and the like, the lighting fixture comprising: a light source ( 20 ) located at the end of a housing ( 25 ), with an existing on the opposite side of the existing light exit panel ( 24 ), wherein the light source and the diaphragm are generally concentric with a longitudinal or optical axis (FIG. 19 ) are arranged of the housing; appropriate funds ( 22 . 23 . 28 - 33 ) for influencing the beam, which comprises one or more than one, preferably four, beam-shaping element (s) ( 30 - 33 ), and also other means for influencing the light, such as one or more lenses and / or an iris and / or a pattern or gobo for influencing a light beam emanating from the light source and along the path of the light beam in the direction the mentioned longitudinal axis through the housing from the light source to the aperture include; and adjusting means for adjusting the position of at least one or more of said beam shaping flap (s), and preferably each of said light influencing means, relative to said longitudinal axis, said adjustments being arranged to rotate about and to rotate about said longitudinal axis are connected to corresponding light influencing means such that rotation about said longitudinal axis adjusts the position of the corresponding light influencing means relative to said longitudinal axis, characterized in that said adjustment means comprise an annular body (Fig . 7 - 18 ) arranged so that its axis is substantially aligned with said longitudinal axis ( 19 ) and which can be used over an outer edge which can be used to apply a rotational force, wherein the surface of said edge is provided with means for friction reinforcement. lighting according to claim 1, further comprising one or more electric motors, with a corresponding drive wheel, which with the mentioned outer edge a corresponding annular body allows the application of a rotational force, are connected. lighting according to claim 2, wherein the drive wheel is a gear and the corresponding outer edge, equipped with a corresponding gear, over teeth, with the teeth of the mentioned Gear mesh when the mentioned gear rotates features. lighting according to one of the claims 1-3, where the annular one Body over one Positioning means for the determination of the angular position of the annular body relative to the mentioned longitudinal Axis features. lighting according to claim 4, wherein the position-determining means is an element which can be scanned remotely, and wherein this body is also remotely controlled Abtastmöglichkeiten for scanning the angular position of said element in relation to said longitudinal axis. lighting according to one of the preceding claims, wherein the adjustment options for or each of the beam shaping doors (s) via a radial adjustment means for radial adjustment of the position of the flap relative to said axis, as well as over circumferentially arranged adjustment means for peri pheren adjustment the mentioned Flap around the said axis has, and wherein the radial adjustment means containing two adjacent concentric annular bodies or rings, wherein everyone is connected to a point of the flap, so the relative Rotation of two rings changes the radial position of the flap. lighting according to claim 6, wherein the flap over a body which is generally oblique to the mentioned Axle protrudes and two arms, which are generally parallel to the mentioned axis stand out, each of the arms having sliding connection means for connecting the respective one Arms with each of the rings, in such a way that these slide into one guide rail in each of the mentioned Rings are included.