MXPA98007613A - Lighting support with g - Google Patents

Abstract

An adapter is described which allows the safe installation of a lighting support to a lighting guide and which lies level with the face of the guide in its closed condition. The adapter includes a pair of downwardly pulled levers similar to fins pivotally mounted to a base. A resilient retention member is engaged by cam walls extending from the lever such that when the lever is pivoted to a level closed position, the resilient members move transversely outwardly and are wedged against the inner walls of the guide rail. lighting, thus ensuring the adapter to the guide. In another aspect of the invention, the lighting support can be closed in a desired horizontal and vertical orientation by the operation of a single actuator arm. Rotating the actuator arm from an unlocked position to a closed position cs two friction plates to engage, thus establishing a brake action that prevents further movement of the lighting support in the vertical direction and also moves a pair of clamps in operative coupling with the lighting support, to limit its horizontal rotation. In another aspect of the invention, a plurality of medium accessories, such as a lens or a color filter, are mounted in a unitary cartridge that includes a plurality of locating and locking devices disposed around its periphery. These devices couple the matching elements into a cartridge sleeve disposed within the interior of the support housing receptacle in a manner that allows only a possible orientation of the cartridge and accessories in the support housing.

Description

LIGHTING SUPPORT WITH GUIDE DESCRIPTION OF THE INVENTION The present invention relates generally to lighting supports and more particularly to a lighting support with improved guidance. Guided lighting systems and supports are used both in private homes, in public buildings, such as museums and commercial establishments, to provide ample lighting through the use of attractive components that are well combined in the design and decoration of the surrounding room. A conventional guide lighting system includes a lighting guide mounted to or on a roof. A lighting guide usually includes a pair of bus bars that consist of a neutral line and a line with current or voltage. A lamp carried within a suitable receptacle is electrically connected to the distributor bars and mechanically secured to the lighting guide by means of a support adapter from which the lamp socket extends downward from the lighting guide and ceiling . Lighting supports with track of this general type are described in, for example, U.S. Patent Nos. 4,919,625 and 5,334,037. In order to achieve a more pleasing appearance of a guided lighting support, it is convenient that the support adapter falls as level as possible with the face or between one side of the lighting guide section. However, the currently available support adapters project by a perceptible distance below the guide section face. The currently available media adapters are usually difficult to install and remove. An additional difficulty has been experienced with the known guide lighting supports as to the force required to remove the guide from the lighting guide is often sufficiently large to cause damage to the guide mounting surface by loosening or bending of the guides. Guide supports on the roof or staying on the roof surface. In addition, in some of the guide lighting supports currently available, the replacement of a lighting fixture can create safety problems. In order to achieve optimum orientation and light distribution of a guide lighting support, the lighting support is often driven, ie moved horizontally and vertically to a desired orientation. The impulse of the support is usually done when it is installed first and when it is located or driven. In most conventional guide lighting supports, it is difficult to secure and maintain the lighting support in the desired orientation after it is driven. Those guide lighting supports allow the driven support to be easily secured in a desired orientation, usually single-purpose operations, which often makes it more difficult to achieve the desired orientation of the lighting support. In order to create a variety of possible lighting effects, accessories are often attached by means such as color filters and diffusion filters and blinds and lenses of different sizes on the lighting support by means of springs or other types of accessories that hold the devices. These devices are sometimes annoying and often do not allow multiple fixtures to be used in lighting means together with another to provide a desired lighting effect. It is an object of the invention to provide an adapter for use in a guide lighting support which can be arranged substantially level with the illumination guide. It is a further object of the invention to provide a lighting support adapter that can be easily inserted into a lighted guide and which provides secure mechanical retention to the adapter in the lighting guide as well as a reliable electrical connection. It is a further object of the invention provide an adapter for the lighting support that can not be mechanically uncoupled while electrically operated. It is another object of the invention to provide a lighting support adapter that can be easily and safely uncoupled from the guide to allow the lighting support and the lamp connection to move in a new position along the guide or change or restart the lamp. It is still another object of the invention to provide a guide lighting support in which the horizontal and vertical positions of the lighting support can be secured in place by the use of a single control member. It is still another object of the invention to provide a guide lighting support in which a number of medium accessories can be loaded and removed without altering the momentum setting of the accessories. For these purposes, the present invention provides a support adapter that allows the safe installation of a lighting support in a lighting guide and in which the adapter, when installed, lies level within the end of the guide. The adapter includes a pair of pull-down levers similar to fins pivotally mounted to a base. The levers that are pulled down include flat surfaces and vertical cam walls. A resilient retention member is engaged by the cam wall so that when the lever is pulled down or pivoted to a clamp or closed position, the resilient members move transversely outward and wedge against a longitudinal rib within the section. guide, thus securing the adapter to the guide section. To release the adapter from the guide section, the levers are pivoted downward to cause the resilient wedge members to move inward away from their wedged portion by closing the positions within the guide housing. The adapter may further include a rotating contact post which includes two vertically spaced contacts. The contact post is rotated by the operation of a lever in and out of the electrical contact with parallel bus bars in the guide section. In one aspect of the invention, the electrical contact to the distributor bars must be uncoupled before the levers pulled down from the adapter can be pivoted down to unlock the adapter, either to remove the adapter and the lighting support to move the adapter. the support to a new position along the guide section. The contact post can not be turned to the energizing position until the lever pulled down is pivoted upward in a closed position above the contact post lever to close the lighting support on the guide section. In another aspect of the invention, the lighting fixture can be closed in a desired horizontal and vertical orientation by the operation of a single actuator arm. The actuator arm includes a plurality of raised surfaces received in a corresponding plurality of inclined depressions formed in an adjacent plate. The rotation of the actuator arm from the non-closed and closed position creates a cam effect between the raised surfaces that move within the cam plate to cause axial movement inward of the latter. The axial movement causes two friction discs to come into contact to establish a brake action in order to prevent further movement of the support in the vertical direction and also moves a pair of clamps in a clamp coupling around a rod member cylindrical, thus imitating the rotation of the support. In another aspect of the invention, a plurality of accessories, such as lenses with a color filter, are mounted in a unitary cartridge that includes a plurality of locating and closing devices arranged around its periphery. These devices couple matching elements in a cartridge sleeve disposed inside the support so as to allow only a possible orientation of the cartridge in the support housing. The middle accessories can be rotated in the cartridge to achieve the desired lighting effect, which is kept by closing the accessories in the cartridge in a single orientation. The cartridge can be removed and reassembled in the cartridge sleeve without changing the original and desired lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS In order to achieve the following and other objects that may appear below, the present invention relates to a guide lighting support as defined in the appended claims and as "described in the following specification as considered with the attached drawings, in which: Figure 1 is a perspective list of a support adapter, closing mechanisms and medium accessory cartridge according to the embodiment of the invention arranged with a lamp socket; Figure 2 is a perspective view of a lighting guide in which the guide support adapter of the present invention is installed; Figure 3 is a perspective view of an adapter of the support of the invention; Figure 4 is a developed view of the adapter of the support of the invention; Figure 5 is a cross section of a lighting guide in which the support adapter of the invention is received and connected; Figures 6A and 6B are elevational cross sectional views respectively illustrating the adapter of the support of the invention in its energized and neutral positions within the lighting guide; Figures 7A and 7B are perspective views of the adapter of the support of the invention in its energized and neutral positions; respectively Figures 8A and 8B are perspective views, on an enlarged scale compared to Figure 7, of the lever pulled downwardly of the support adapter of the invention respectively in their secured and unclamped positions; Figure 9 is a partially developed perspective view of a bolt mechanism according to the invention; Figures 10A, 10B and 10C are perspective views illustrating the construction and operation of the ramp plate, activating the lever and brake plates of the closing mechanisms of Figure 9; Figure 11 is a perspective cross-sectional view of the bolt mechanism of Figure 9; and Figures 12 and 13 are developed perspective views of a media accessory cartridge according to the invention. Figure 1 illustrates a lighting support or lamp housing 2 that is designed to be mounted and secured within a lighting guide 10 (Figure 2) by means of a support adapter 4. The support adapter 4 is secured to the end upper of a rod 6, the lower end of which is secured to a bolt mechanism 8 which, as described below, allows the lighting support to be closed in a desired orientation. An intermediate cartridge 9 also described below, allows a plurality of mid-fittings to be accurately oriented within the lighting support 2. The lighting guide 10, which is adapted to be mounted inside or on the surface of a roof, includes, as seen in Figure 2, an insulated liner or guide body 12 including a pair of parallel vertical walls 14 separated by the transverse mesh 16. As seen in Figures 2 and 3, the internal surface of each side wall 14 includes a pair of spaced conductive bus bars 18 that extend along the length of the liner. Each pair of bus bars, includes a line connected to ground or neutral and a voltage or line with current. A rib of the guide 20 extends below the distribution bars 18 along the length of the lighting guide 10. An enlarged channel 22 is formed along the length of the lighting guide 10 below the rib guide 20. In accordance with one aspect of the invention, the support adapter 4, which is described in greater detail in a large part of this specification, is capable of being mounted by leveling within the lower end of the channel of or with the lower end of the channel 22 of the lighting guide 10 as shown in Figure 2. As described in detail below, the adapter 4 also provides electrical connection of lighting support 2 to the distribution bars 18 in the lighting guide by the manual rotation of an electric coupling lever 32 within the confines of a peripheral groove 34 formed in the upper end of the rod 6. As seen in Figures 3 and 4, the support adapter 4 includes a b ase 36 made of an electrically conductive material such as aluminum mounted on the upper end of the rod 6. The base 36 includes spaced apart side walls 38 and a central opening 39. A pair of opposing, fin-like, pull-down levers 40 are pivotally mounted in the bolts 42 to the base. As best seen in Figures 9A and 9B, the levers pulled down 40 each include a flat inner surface 44 and a pair of used vertical spring support walls 46. A spring is also mounted on each pivot bolt 42. of mechanical support 48 including an inclined or curved cross section 50. The spring 48 is received within a depression 58 formed in the upper surface of the base 36. The support adapter 4 further includes, as seen in Figures 7A and 7B, a pair of end fingers 52 fixed to the outer ends of each of the levers pulled down 40. A rib 54 projects from the inner surface of each of the fingers 52 and a pair of spaced poles 56 is provided at each end of the upper surface of the base 36. Since by itself it is conventional, a grounded spring 5'7 is placed in another depression on the upper surface of the base of the adapter 36. As best seen in Figure 4, the contact support structure secured to the upper end of the rod 6 extends through an opening 40 in the base of the adapter 36. This structure includes an internal isolation post 60 on the which an insulation tube 62 is adapted. A contact station post 64 which includes vertically spaced mounting tabs 66, 68 is received within the upper end of the tube 62. One end of a neutral contact 70 extends radially from the outside. of the contact post 64 and a current or voltage contact 72 is received within an opening in the upper end of the post 64 so that the contact free end 72 projects from the upper end of the contact support post 64. By securing the bracket adapter 4 to the lighting guide section 10, the upper end of the adapter is inserted into the channel 22 with the levers pulled down 40 in their unclamped or neutral position shown in Figures 3A and RB . At this time, the coupling lever 32 and the contacts 70, 72 are in their non-electrified or neutral positions shown in Figures 3, 6B and 7B. The pull-down levers 40 are then pivoted about the bolts 42 to cause them to be clamped in the guide or mechanically engaged in their position shown in Figures 2 and 7B. As the levers pulled downward 40 pivot upwards, the spring support walls 46 move upwardly relative to the internal surfaces of the support springs 48. As the levers pulled downward 40 pivot further upwards, the springs 48 including the inclined section 50 are increasingly urged outwardly by the camming force of the spring support walls 46 against the support springs 48 until the levers pulled down 40 are in their fully leveled position. elevated shown in Figures 7B and 8A. At this time, the spring sections 50 extend to their maximum transverse position, in which, as best seen in Figure 5, they are wedged horizontally against the inner guide side wall 14 and vertically against the guide rib 20. At this time the end fingers of the lever 52 are also wedged against the guide rib 20. The coupling of the support springs 50 and the fingers 52 with the inner guide wall of lighting in this way securely retain the holder adapter 4 within of the lighting guide. As shown in Figure 2, in this position of the bracket adapter 4, its lower surface, mainly the lower flat wall sections of the lever pulled down 40, are substantially flush with the lower end of the lighting guide 10 as is desired Once the support adapter 4 is secured in the lighting guide 10 as described, the electrical support connections can be made to the distribution bars 18 in the lighting guide 10 by rotating the electrical coupling lever 32 within the groove. 34 in the direction of arrow 69 (FIG. 7B) from the neutral position (FIG. 7B) to the energized position (FIG. 7A) so that, in turn, turn contact post 64 to the energized position shown in FIG. 6A. In this position the contact post 64, the tabs 66, 68 engage the transverse rib 20 of the Jumping guide and the contacts 70, 72 make electrical contact respectively with the distribution bars connected to ground and current 18. The rotation of the coupling lever 32 for this position is biochecked by the levers pulled down 40 when in their unclamped or neutral position shown in Figure 8B, so that the electrical connection of the light support for the lighting guide 10 is prevented until the adapter of the support 4 is secured or closed in the lighting guide, that is, when at least one of the levers is pulled downward 40 has been moved upward to the clamping position shown in Figure 8A. The lever 32 must be turned to de-energize the lighting support before the support can be removed from the lighting guide. In another aspect of the invention, the latch mechanism 8 is tested on the lower end of the rod 6 to which the lighting support 2 is fixed to close the rod 6 and the lighting support 2 in the desired vertical and horizontal positions. As is conventional, as shown in Figure 9, the lower end of the rod 6 is threadably engaged with a support cage 82 by means of a clamping bushing 84, which as seen in Figure 9, is secured to the support 2. As seen in Figure 9, the bolt mechanism 8 includes a pair of opposing detent clamps 72, 74 whose internal arcuate surfaces are disposed around the lower end of the rod 6. A first friction or brake reinforcement 74 is fixed to the outer surface of the clamp 72 and a second friction or brake reinforcement 75 is secured to an internal surface of a ramp plate 78. An internal barrel 80 having a curved inner surface extends through the openings in the plates 72, 74, 75 and 78 and engages the lower end of the rod 6. The external reduced diameter portion of the inner barrel 80 is received within an aperture formed in a lever disk 86, which is integral with an actuator arm 88. As best seen in Figures 9 and 10, a plurality (here three) of equiangularly spaced apart pumps 90 project from the inner surface of the lever disk 86. A corresponding plurality of inclined arcuate depressions 92 are formed on the outer surface of the ramp plate 78. A spacer washer 94 is placed over the reduced diameter end of the inner barrel 80 and a pair of spring washers 96 are placed around the central pin 98 extending outward from the retaining clamp 74. A plurality of angular division indicators 100 are arranged around the outer periphery of the retainer clamp 74.

In order to drive the aluminum support, that is, to move it in a desired position, the lighting support is manually rotated around the rod 6 horizontally and vertically. During this positioning of the lighting support, the actuating lever 88 is in its open position shown in solid lines in Figures 10A, 10B and 10C and in dotted lines in Figure 11 at which time the brake reinforcements 75, 76 are separated and the detent clamps 72, 74 are separated from the periphery of the rod 6. Once the lighting support is in its desired horizontal and vertical positions, the rod 6 can be closed in place by moving the actuator lever 88 to its closed position. shown in the dashed lines in Figure 10 and solid line in Figure 11. As the lever 88 moves from its open position to its closed position, the pumps 90 on the lever disks 88 move along the inclined ramps 92 in the ramp plate 78. The camming action of the pumps along the plate 78 causes the latter to move transversely to the right, as shown in Figures 9 and 11, which in turn , or It cares that the reinforcements of irene 74, 75 enter into firm coupling with one another. The frictional brake force created by the coupling of the brake reinforcements prevents further vertical pivoting of the rod 6, thus closing the rod in its desired vertical orientation, as indicated by the indicator 100. Movement within the lever disc 86 it also acts through the inner barrel 80 to drive the retainer clamps 72 and 74 against the periphery of the rod 6, thus preventing additional horizontal rotation of the rod 6 and closing the rod 6 in its pre-established horizontal orientations. When the actuator 88 is in its open or unlocked position, minimal attention is still applied to the rod by means of a spring washer 96 to a degree determined by the attachment of adjusting bushings 85. This holding force allows a movement of the rod 6 in which the vertical and horizontal direction in its desired position prevents the lighting support from swinging freely with respect to the rod. The media cartridge 9, according to the invention, is illustrated in Figures 12 and 13. As shown here as a plurality (here three) of media accessories 106 such as, for example, a color filter, a lens and A shutter is axially separated within a unitary middle cartridge 108 and retained therein by the use of any suitable means such as a circular wire (not shown) received within the periphery of the cartridge. As best seen in Figure 13, the middle cartridge 108 contains a plurality (here three) of locating means and latches arranged around its periphery. These latch means in the illustrated embodiment are equiangularly spaced around the periphery of the cartridge and include first and second alignment slots 110, 112 and an alignment spring 114. The latter includes a resilient arm 115 secured at one end to the inner surface of the middle cartridge 108 and a tab 117 (Figure 12) connected to the arm 115 and extending through an opening formed in the long diameter section 126. A cross glare reducing sheet 130 is placed within the forward end of the middle cartridge 108. A cartridge sleeve 116 is mounted within the light holder and surrounds a lamp 108 shown in dotted lines in Figure 1. As seen in Figures 12 and 13 the cartridge sleeve 116 includes three matching media equiangularly spaced apart for the three media of locating and latching on the middle cartridge 108. Specifically, the cartridge sleeve 116 includes first and second media d and latch 120, 122 which coincide with the alignment slots 110, 112 on the middle cartridge 108 and an alignment slot 124 adapted to receive the projection tab 117 of the latch spring 114. To assemble the middle cartridge in the arrangement shown in FIG. Figure 1, the internal large diameter section 126 of the middle cartridge 108 containing the middle fittings 106 is inserted into the cartridge sleeve 116, until the alignment slots 110, 112 on the section 126 are engaged in the latch tongues 120, 122 on the cartridge sleeve 116, and the spring tab 117 is received within the alignment groove 124. The middle cartridge 108 can then be rotated through a small angle in the direction of the arrow 128 (Figure 13) so that Close the middle cartridge in its position and thus avoid unwanted relative rotation between the medium accessories housed in the middle cartridge. It will be understood from the foregoing description of a preferred embodiment, that the guide lighting support of the invention provides a level attachment of the lighting guide adapter while achieving the secure mechanical and electrical connection between the adapter and the lighting guide. . It will also be evident that the lighting support can be easily and reliably closed in the desired horizontal and vertical positions by the movement of a single actuator. The support of the invention also allows the use of medium accessories precisely oriented in a single cartridge within the lighting support. Furthermore, it will be understood that although the present invention has been described with respect to a currently preferred embodiment, variations of this modality may be apparent to the MI experts of the matter without being switched off or 'c? - ai j amenté of the spirit and scope of the invention.

Claims (33)

1. CLAIMS 1. A support adapter for securing a lighting support to an aluminum guide, the adapter is characterized in that it comprises a base, at least one member. Movable operation secured to the base, the drive member being movable on a p. a direction between a first unclamped position and a second clamped position and resilient retaining means mounted on the base in operative engagement with the actuating member and movable in a second direction substantially normal to said first direction between a rest position and a position of closure in response to movement of the actuating member from the unclamped position to its clamped position. The support adapter according to claim 1, further characterized in that it includes a rod fixed at its upper end to said base and its other lower end to the lamp housing and further comprising bolt means fixed to the lower end of the rod to restrain the horizontal and vertical movement of the lamp housing. The support adapter according to claim 2, characterized in that the bolt means includes first and second friction plates and a driven arm, operatively connected to one of the indexing plates to cause that, when the bia or The actuator moves from an open position to a closed position, the friction plate in the friction coupling with the other of the friction plates limits the movement of the housing of the lamp in the vertical dilection. 4. The support adapter according to claim 3, characterized in that the bolt means further comprise first and second movable fastening means in operative coupling with the lamp housing to imitate the movement! Itself in the direction? rizóntai. The support adapter according to claim 4, further characterized in that it comprises first cam means connected to the actuator arm and second cam means connected to a friction plate to cause the transverse movement of the friction plate when the actuator arm moves to its closed position. 6. The support adapter according to claim 5, characterized in that the first means of ' eva include a plurality of moveable repaired raised surfaces together with the actuator arm and the second cam means include a cam plate that includes a corresponding plurality of inclined depressions fixed to a friction plate to receive respectively and in cooperation with the devices. the evadas. 7. HJ adapter of s poi 1 of consistency with the vindication 2, further characterized in that it comprises the half-cam means connected to the driven arm! and the second camming means connected to an indexing plate to cause the transverse movement of a friction plate when the actuator arm moves to its closed position. b. The support adapter according to claim 7, characterized in that the first cam means includes a plurality of separate raised surfaces that move together with the actuator arm and the second cam means includes a cam plate that includes a corresponding plurality of cam followers. inclined depressions fixed to a friction plate to receive and cooperate with the raised surfaces. The support adapter according to claim 1, characterized in that the actuating member includes a flat surface and a cam wall section extending from the flat surface and engaging the resilient retaining means, the flat surface lying substantially flush with the lower edge of the lighting guide when the drive member is in the clamped position. 10. The adapter support of consistency with claim 9, characterized in that the retention means i <-: Alientes include a vertical section that couples the wall section and a horizontal section that extends from the upper end of the vertical section. 11. The support adapter according to claim 10, characterized poique is formed an opening cn said base comprising a contact post that is < In the case of the opening and including first and second separate electrical contacts, the contact post is movable between a first position in which the contacts come into contact with a power line in the guide section. to a second position in which the contacts are electrically disconnected from the power line. 12. The support adapter according to claim 11, characterized in that said contact post further includes at least one tongue adapted to engage the inner wall of the lighting guide when the contacts are in their first position. i? . The support adapter according to claim 12, further characterized in that it comprises a lever operatively connected to the contact post and is rotatable between the first and second positions to cause the contact post to move between its first and second positions. 14. The solenoid adapter, c-onioiity with the vindication 13, further characterized in that the lever can be operated to move the contact post to its first coupling position when the actuator member of the adapter is in its position. position held. 35. The support adapter according to claim 1, characterized in that the resilient retaining means include a vertical section that couples the wall section and an arcuate section extending from the upper end from the vertical section. The support adapter according to claim 15, characterized in that an opening cn is formed in the base and comprising a contact post extending through the opening and includes first and second separate electrical contacts, the contact post being movable between a first position in which the contacts come into contact with a power line in the guide section, to a second section in which the contacts are electrically disconnected from the power line. The support adapter according to claim 16, characterized in that the contact post further includes at least one tongue adapted for attach the internal wall of the lighting guide when the contacts are in their first position. GO. The adapter means according to claim 17, further characterized in that it comprises a lever operatively connected to the contact post and is rotatable between the first and second positions to cause the contact post to move between the first and second positions. . 19. In the lighting support according to claim 18, characterized in that the lever is operable to move the contact post to its first coupling position when the actuator member of the adapter is in its clamped position. The support adapter according to claim 1, characterized in that an opening is formed in the base, and comprising a contact post extending through the opening and including first and second spaced electrical contacts, the contact post. • moveable between a first position in which the contacts come into contact with a power line in the guide section to a second position in which the contacts are electrically disconnected from the power line. The support adapter according to claim 20, characterized in that the contact post also includes at least one tongue adapted to couple the internal wall of the aluminium qui.t when the contacts are in their first position. The support adapter according to claim 21, further characterized in that it comprises a lever operatively connected to the contact post and is rotatable between the first and second positions to cause said contact post to move between its first and second positions. The support adapter according to claim 1, characterized in that the lever can be operated to move the contact post to its first engagement position when the actuator member of the adapter is in its clamped position. 24. In combination with the support adapter according to claim 1, further characterized in that it comprises a cartridge sleeve secured inside the housing, a middle cartridge, with a plurality of axially spaced medial fittings disposed in such a middle cartridge and a a predetermined angular orientation relative to another and corresponding to the locating and latching means in the cartridge means and in the medium cartridge for securing the middle cartridge to the cartridge sleeve in a preselected angular relationship. 25. In a guide lighting support characterized in that a lamp housing is secured to a lighting guide by means of a support adapter, a bolt mechanism for closing the lamp housing in a desired horizontal and vertical direction, the bolt mechanism including first and second friction plates and an actuator arm operatively connected to one of the friction plates to cause that, when the actuator arm moves to a bolt position, said friction plate moves in frictional engagement with the other of the friction plates, thus limiting a movement of the lamp housing in the vertical direction. 26. In the guide lighting support according to claim ^ 25, characterized in that the bolt means further comprises first and second movable fastening means in operative coupling with the lamp housing, so as to limit a movement of the same. in the horizontal direction. 27. In the guide lighting support according to claim 26, further characterized in that it comprises first cam means connected to the actuator arm and second cam means connected to a friction plate to cause transverse movement of the friction plate when the driven arm moves to its closed position. 28. In the guide lighting support according to claim 27, characterized in that the first camming means includes a plurality of separate raised surfaces moving together with the actuating arm and the second camming means includes a cam plate including a corresponding plurality of inclined depressions fixed to the friction plate for receiving respectively and in cooperation with the raised surfaces. 2 ? . In the guide lighting support according to claim 25, further characterized in that it comprises first cam means connected to the actuator arm and second cam means connected to a friction plate, it can cause the transverse movement of the friction plate when the Actuator arm moves to its closed position. 30. In the guide lighting support according to claim 29, characterized in that the first cam means includes a plurality of separate raised surfaces that move together with the actuator arm and the second cam means include a cam plate that it includes a corresponding plurality of the inclined depressions fixed to the friction plate to receive respectively and in cooperation with the raised surfaces. 31. For use in a guiding lighting support, including a lighting guide and a lamp housing fixed to the lighting guide by means of a support adapter, the lamp housing is characterized in that it comprises a cartridge sleeve secured in its part. inside, a middle cartridge, a plurality of axially spaced means fittings disposed with the middle cartridge in a predetermined angular orientation in relation to one another and corresponding to locating and latching means in the cartridge means and in the middle cartridge can secure the medium cartridge to the cartridge sleeve in a predetermined angular relationship within the lamp housing. The lamp receptacle according to claim 31, characterized in that the locating and locking means include at least first and second matching grooves and tabs, a third different bolt element in one of the cartridge sleeves and the middle cartridge and a slot received in the other middle cartridge and the cartridge sleeve to accommodate the lock element. The lamp receptacle according to claim 32, characterized in that the third bolt element is a tongue resiliently mounted to a middle cartridge and the cartridge sleeve. SUMMARY An adapter is described that allows the safe installation of a lighting support to a lighting guide and that lies level with the face of the guide in its closed condition. The adapter includes a pair of downwardly pulled levers similar to fins pivotally mounted to a base. A resilient retention member is engaged by cam s extending from the lever such that when the lever is pivoted to a level closed position, the resilient members move transversely outwardly and are wedged against the inner s of the guide rail. lighting, thus ensuring the adapter to the guide. In another aspect of the invention, the lighting support can be closed in a desired horizontal and vertical orientation by the operation of a single actuator arm. Rotating the actuator arm from an unlocked position to a closed position causes two friction plates to engage, thus establishing a brake action that prevents further movement of the lighting support in the vertical direction and also moves a pair of clamps in operative coupling - with the lighting support, to limit its horizontal rotation. In another aspect of the invention, a plurality of medium accessories, such as a lens or a color filter, are mounted in a unitary cartridge that includes a plurality of locating and locking devices disposed around its periphery. These devices couple the matching elements into a cartridge sleeve disposed within the interior of the holder receiving receptacle in a manner that allows only a possible orientation of the cartridge and accessories in the holder housing.