Abstract:
A recessed light fixture has vertical tilt and horizontal rotation adjustments recessed radially outwardly from a trim aperture defining ring for a cleaner aspect of the lamp aperture. A lamp holder is reachable through the trim aperture for manually returning the lamp holder from a tilted position to a vertical position and is releasable downward from the fixture for relamping in response to manual pulling force. A mechanical memory returns the lamp holder to the initial tilted position upon reinsertion of the lamp holder and release of the manual pulling force. The lamp fixture can be miniaturized to a size of about 2.5 inches in diameter and sized to fit in a ceiling cutout of about 3.5 inches in diameter.

Description:
This application claims priority to the filing date of provisional patent application No. 61/056,063 filed May 26, 2008 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates generally to the field of interior and architectural lighting and more specifically concerns a hot aimable lamp and trim assembly with tilt memory for adjustable recessed light fixtures. 
     2 . State of the Prior Art 
     Recessed lighting is widely used for residential and commercial applications. Recessed light fixtures are installed in hollow spaces concealed by architectural panels such as ceilings, walls or floors, with only an aperture and a surrounding ornamental trim visible from the outside. The recessed fixture normally has a concealed sheet metal housing connected to a source of electrical power. The metal housing prevents contact of the hot light source with nearby flammable material. The housing has an aperture aligned with a cutout in the architectural panel, and a decorative trim covers the edge of the cutout to give a finished look to the installation. 
     Architectural recessed light fixtures fall into three broad categories: down lights, which typically direct the light output straight down from a ceiling; wall wash lights, which graze an architectural surface with light; and adjustable accent lights which aim a directional light at an area or object not directly underlying the fixture, such as an artwork on display or a furniture grouping. 
     Adjustable accent lights include a mechanism for aiming the light beam after the fixture has been installed, preferably while the fixture is turned on so that the effect of the lighting adjustment is immediately evident. This capability is known as hot aiming and is desirable because it allows adjustment without having to touch the hot lamp element. 
     Adjustable accent lights have commonly used halogen light sources. Halogen lamps are incandescent lamps with a tungsten filament sealed in a compact transparent envelope filled with an inert gas, plus a small amount of halogen such as iodine or bromine. Halogen lamps are small and can be used effectively with compact light reflector or lens systems for architectural lighting. 
     A trend towards more energy efficient lighting has brought about growing interest in metal halide lamps for architectural lighting. Metal halide lamps produce light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina tube. Compared with halogen lamps, metal halide lamps have higher luminous efficacy because more output is visible light as opposed to heat, and they also produce a greater amount of light output per watt of electricity input. Metal halide lamps also have much longer life spans than halogen lamps. On the other hand, metal halide lamps require a warm up period as long as two to five minutes, and when turned off require a cooling period of five to ten minutes before the arc can be relit. 
     Until not long ago metal halide lamps were mainly used in industrial applications where their lower cost of operation through reduced energy consumption and infrequent relamping requirements outweighed the warm up and cooling period requirements. In such applications the lights are turned on and off infrequently, often only once a day at opening and closing time. However, recent improvements in metal halide lamps have alleviated their former disadvantages making them more suitable for architectural lighting applications. 
     Lamps in recessed fixtures require occasional replacement. In larger fixtures this can be accomplished by reaching through the aperture of the fixture to remove the spent element and installing a fresh one. In compact recessed fixtures the aperture is too small to allow such access and fixtures have been developed with lamp holder assemblies which can be partially or entirely extracted through the trim aperture for access to the lamp element. In compact adjustable accent lights this requires that the lamp aiming mechanism be brought from an inclined position to an upright vertical position because the tilted mechanism will not pass through the small aperture. To facilitate lamp replacement, mechanical tilt memories have been developed which automatically return the aiming mechanism to its initial tilted condition after the lamp holder assembly is replaced into the fixture housing. 
     Compact recessed lights, requiring small cutouts in the architectural panel and having small trim apertures, are desirable and esthetically attractive. Yet the design of compact adjustable accent lights is challenging because there is little room for the hot aiming and tilt memory mechanisms, and even more so for metal halide lamps because these lamps are relatively large compared to halogen lamps and take up more space in the lamp assembly. 
     An example of an adjustable hot aimable lamp assembly with memory is the “I.D.” or “Intelligent Downlight” family of accent lights sold by Focal Point L.L.C. of Chicago, Ill., for use with halogen and ceramic metal halide (CMH) lamps. The lamp assembly in these lights can be partially pulled from its housing for relamping. A memory feature returns the lamp holder and reflector to its inclined position when the lamp assembly is pushed back into its housing. A hot aiming mechanism is operated by turning adjustment screws in a circular flange which encompasses the aperture under the trim plate of the fixture. A shortcoming is that the external trim plate must be removed for access to the aiming adjustment screws. Also, the I.D. family of fixtures requires a five inch diameter cutout in the ceiling or other architectural surface. 
     A need exists for smaller adjustable accent lights with hot aiming and memory features, requiring, for example, a cutout of only 3.5 inch diameter, and capable of accommodating metal halide light sources as well as halogen lamps. 
     SUMMARY OF THE INVENTION 
     This invention addresses the aforementioned need by providing an adjustable lamp assembly for installation in a recessed light housing. The adjustable lamp assembly has a trim collar for attachment to the recessed housing through a cutout hole in an architectural surface such as a ceiling, a gear ring releasably fixed in the trim collar, and a bearing ring rotatable on the gear ring such that the collar, gear ring and bearing ring together define an aperture of the adjustable lamp assembly. A lamp holder with a reflector is supported on the bearing ring for directing a beam of light through the aperture. The lamp holder is tiltable on the bearing ring through a continuous tilt arc between a vertical and an inclined position. A vertical tilt adjustment is provided for adjusting inclination of the lamp holder on the bearing ring and a horizontal rotation adjustment for turning the bearing ring with the lamp holder relative to the gear ring and the trim collar. Each adjustment has a corresponding set screw preferably recessed in an inner surface of the bearing ring and accessible through the aperture of the lamp assembly for adjustment with a hand tool such as a screwdriver. 
     Each set screw may be recessed in a corresponding bore in the bearing ring. For example, the bearing ring may have an annular inner surface partly defining the aperture and the set screws are recessed in corresponding bores open on the annular inner surface. 
     The adjustable lamp assembly may have a tilt bias spring for biasing the lamp holder towards a fully inclined or tilted position, and the vertical adjustment is operative against this bias for adjusting the lamp holder to an intermediate tilted position continuously selectable between the vertical position and the fully inclined position. 
     A finger hold is connected to the lamp holder and can be reached with a hand through the aperture for manually pulling down and returning the lamp holder to a vertical position from a preset tilted position. The gear ring is then releasable together with the bearing ring and the lamp holder from the trim collar in response to further manual pulling force on the finger hold. Preferably, a mechanical memory is provided for returning the lamp holder to the preset tilted position after the finger hold is released of the manual pulling force. 
     In a preferred embodiment the vertical tilt adjustment includes a pin linearly displaceable along a threaded drive shaft supported for rotation on the bearing ring, with a first set screw rotatable on the bearing ring and a coupling spring connecting the threaded drive shaft for rotation with the set screw. The horizontal rotation adjustment may include a drive gear journaled to the bearing ring and in mesh with the crown gear, and another set screw coupled for turning the drive gear along the crown gear thereby to turn the bearing ring relative to the gear ring. Each set screw may be installed in a corresponding bore in the bearing ring where each bore is inclined with an open end towards the trim collar to facilitate access into the bore with the screwdriver or equivalent hand tool. 
     In another aspect of this invention a compact hot aimable trim assembly is provided for use with a metal halide lamp in a recessed light fixture, comprising a trim collar with a trim plate for installation in a ceiling cutout, a lamp holder assembly supported on the trim collar, the lamp holder assembly including a metal halide lamp and a parabolic light reflector for directing a beam of light emitted by the lamp through a trim aperture; a vertical tilt adjustment for adjusting inclination of the lamp holder assembly relative to the trim collar and a horizontal rotation adjustment for turning the lamp holder assembly in the trim collar such that the beam of light can be selectively aimed through the aperture; the trim aperture and the parabolic reflector each having a diameter substantially not greater than 2.5 inches and the trim collar being sized to fit in a ceiling cutout not substantially greater than 3.5 inch diameter. 
     The lamp holder assembly is removable through the trim aperture from the trim collar responsive to manual pulling force on the lamp holder assembly. 
     The lamp holder assembly is spring biased to a preset tilted position continuously selectable between a vertical position and a fully inclined position and the lamp holder is returnable to the vertical position responsive to the manual pulling force. The compact hot aimable trim assembly preferably has a mechanical memory for returning the lamp holder to the preset tilted position upon release of the manual pulling force. A vertical tilt adjustment and a horizontal rotation adjustment each have adjustment setting elements interior to the trim aperture and are accessible for adjustment with a hand tool such as a screwdriver inserted into the trim aperture without separation of the trim face from the trim assembly in the ceiling cutout. Each adjustment has a corresponding setting element recessed in a ring assembly outside the trim aperture diameter such that the aperture as seen from an exterior side of the trim plate presents a clean interior appearance unobstructed by either setting element. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side elevational view of the adjustable trim assembly shown installed in a typical recessed light housing; 
         FIG. 2  is a perspective top side view of the adjustable trim assembly in a partially titled condition and free of light housing of  FIG. 1 ; 
         FIG. 3  is an axially exploded view of the adjustable trim assembly of  FIGS. 1 and 2 ; 
         FIG. 4  is a top left perspective view of the trim assembly showing the torsion bias spring normally urging the assembly to a tilted position, and the horizontal drive pinion gear in mesh with the crown gear; 
         FIG. 4   a  is an enlarged detail view of area C in  FIG. 4  showing the horizontal drive pinion gear; 
         FIG. 5  is a front left perspective view of the trim assembly shown in a 30-degree tilt; 
         FIG. 5   a  is a detail view of area D in  FIG. 5  showing the stop pin in abutment with the stop edge for setting the tilt of the trim assembly, and also illustrating the vertical tilt set screw recessed in its inclined bore in the bearing ring; 
         FIG. 6  is a right side elevational view of the trim assembly set to a ten-degree tilt; 
         FIG. 6   a  is an enlarged detail view of area F in  FIG. 6  showing the outer side of the vertical tilt adjustment mechanism; 
         FIG. 7  is a front left elevational view of the trim assembly set in zero degree vertical position; 
         FIG. 7   a  is an enlarged detail view of area G in  FIG. 7  showing how the stop pin abuts against the stop edge to hold the trim assembly in zero degree vertical position of  FIG. 7 ; 
         FIG. 8   a  is a front elevational view of the trim assembly in tilted position and illustrating how a screwdriver tool is inserted through the trim aperture for access to the horizontal rotation adjustment screw; 
         FIG. 8   b  is a bottom right side view of the mechanism tilted as in  FIG. 8   a  and showing how the tip of the screwdriver tool reaches the horizontal rotation set screw recessed from the trim aperture; 
         FIG. 9   a  is a front elevational view of the trim assembly in titled condition illustrating how a screwdriver tool is inserted into the trim aperture for access to the vertical tilt set screw; 
         FIG. 9   b  is a bottom left view of the trim assembly tilted as in  FIG. 9   a  and showing how the tip of screwdriver tool engages the vertical tilt set screw recessed from the trim aperture; 
         FIGS. 10   a ,  10   b  and  10   c  show the sub-assembly of the lamp holder/reflector supported on parallel sliding arms mounted on the carrier sleeve, the latter showing its integral pivot pins to which are normally connected the upper ends of the four linkage arms in the previous figures,  FIG. 10   a  being a front elevational view of the sub-assembly,  FIG. 10   b  being a side elevational view of the same and  FIG. 10   c  being a front left perspective view of the same sub-assembly. 
         FIG. 11  is a detail left rear perspective view showing an alternate tilt adjustment mechanism of the adjustable lamp assembly; 
         FIG. 12  is a detail front perspective view showing the alternate tilt adjustment mechanism of  FIG. 11 ; 
         FIG. 12A  is a schematic illustration of the cam block in relation to the cam arm at a maximally elevated position of the cam block corresponding to a fully tilted position of the lamp carrier; 
         FIG. 13  is a view as in  FIG. 12  with the cam block at an intermediate elevation on the threaded shaft, depressing the cam arm to an intermediate tilt position of the lamp assembly; 
         FIG. 13A  shows the relationship between the cam block and cam arm corresponding to the tilt adjustment of  FIG. 13 ; 
         FIG. 14  shows the cam block and cam arm in fully depressed position corresponding to a vertical position of the lamp assembly; 
         FIG. 14A  schematically illustrates the relationship of the cam block and cam arm corresponding to the lamp assembly position of  FIG. 14 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to the accompanying drawings in which like elements are designated by like numerals,  FIG. 1  shows the hot aimable lamp and trim assembly with tilt memory of this invention generally designated by numeral  10 . Trim assembly  10  is shown installed in a typical light housing  12  recessed above or behind an architectural panel  14 . Housing  12  has a housing aperture defined by a rim  12   a  in register with a cutout opening  16  in panel  14 . 
     A trim collar  20  fits through both the cutout  16  and the housing aperture, and is secured to rim  12   a  by three circumferentially spaced collar clamps  24 . Collar clamps  24  are vertically adjustable on collar  20  in vertical slots  26  such that the clamps and the housing  12  can be raised or lowered on the collar as needed to compensate for differences in the thickness of panel  14  between trim face  22  and the housing bottom including rim  12   a.    
     The trim collar  20  in the illustrated example is cylindrical in a circular cutout  16 , but collar  20  and the cutout can be square, rectangular, oval, or any other shape. 
     The hot aimable lamp and trim assembly  10  will now be described with reference to  FIGS. 1 through 10   c . The assembly  10  includes a trim assembly supported on the trim collar  20  which defines the aperture of the recessed light, and a lamp assembly mounted on the trim assembly which can rotate horizontally and tilt vertically for aiming the light through the trim aperture. The trim assembly is in part stationary on the trim collar and in part rotatable with the adjustable lamp assembly. Hereafter, the stationary portion of the trim assembly is sometimes referred to as the base assembly. 
     Turning to  FIGS. 2 and 3 , the adjustable lamp assembly  10 , shown free of the housing  12 , has a crown gear  30  supported within trim collar  20  by three circumferentially spaced spring clips  32  which project radially from crown gear  30  and into corresponding spring windows  36  in collar  20 . The stationary base assembly includes the crown gear  30 , an insert  38  and a trim plate  22 . Insert  38  has a cylindrical insert wall with an inner radial surface  38   a  and an external radial flange  42 . Flange  42  is sized to pass through the inside of collar  20 . Spring clips  32  are fastened to flange  42  at circumferentially spaced locations with screws  44  below flange  42  with outwardly curved spring portions  32   a  facing away from the cylindrical wall  38   a  of insert  38 . Insert  42  can be pressed into the bottom of collar  20  such that the curved portions  32   a  of spring clips  32  are first flattened between collar  20  and insert  38 , until trim plate  22  abuts against the bottom of collar  20  and spring clips reach alignment with windows  36 , at which point the spring portions  32   a  are able to expand each into a corresponding window  36 , thereby locking insert  38  and trim plate  22  against rotation relative to collar  20  and at the same time supporting insert  38  in collar  20  in a vertical or axial direction. Screws  44  pass through corresponding screw holes in insert flange  42 , spring clips  32  and into threaded blind bores (not shown) in the underside of crown gear  30 . The crown gear is consequently also fixed against rotation in collar  20  together with insert  38 . 
     Crown gear  30  encompasses a circular bearing surface  46  on insert  38 . A bearing ring  40  of outside diameter smaller than the inside diameter of crown gear  30  rests upon bearing surface  46 . Ring  40  has a radial flange  48  which is captive in a sliding fit in a radial undercut  52  in gear  30 , such that the flange  48  is axially captive but free to turn between crown gear  30  and insert  38 , allowing bearing ring  40  to rotate relative to crown gear  30  and insert  38 . 
     Insert  38  has an internal radial surface  38   a  and bearing ring  40  has an inner radial surface  40   a . The inner radial surfaces  38   a  and  40   a  and trim plate opening  22   a  collectively define a trim aperture  34  of the lamp assembly  10 . Preferably, trim plate opening  22   a  and inner radial surfaces  38   a  and  40   a  are all three of similar inside diameter such that the trim aperture  34 , as seen through trim plate opening  22   a  in an installed condition of assembly  10  as in  FIG. 1 , has the appearance of a substantially continuous smooth cylindrical wall surface. 
     Two set screws are installed for rotation in corresponding bores formed through bearing ring  40 . A first set screw is horizontal adjustment screw  56  which turns in a first bore  58 . Bore  58  opens on inner radial surface  40   a  of ring  40  and also opens on the radially outer surface of the bearing ring. The radially inner end of set screw  56  has a slotted screw head  56   a  which can be engaged with a suitable hand tool such as a screwdriver, as depicted in  FIGS. 8A and 8B . The radially outer end of screw  56  carries a pinion gear  54  in mesh with crown gear  30 . Turning of screw  56  also turns pinion gear  54  against the stationary crown gear  30 , causing pinion gear  54  to travel around crown gear  30  carrying with it bearing ring  40  such that the latter turns on crown gear  30  and also in relation to insert  42  and collar  20 . 
     Bearing ring  40  carries a tiltable lamp assembly which includes a lamp carrier  66  consisting of axially telescoped upper and lower cylindrical sleeves  66   a ,  66   b  open at opposite top and bottom ends. The lower sleeve  66   b  of lamp carrier  66  is of stepped-down inside diameter to define an interior radial step (not shown) on which can be supported any of a variety of light beam conditioning accessories used in the trade, for example, a circular light filter  74  shown in  FIG. 3 . 
     Carrier  66  is articulated to the bearing ring  40  by two pairs of linkage arms including two follower arms  68  and two actuating arms  70 . Each arm  68 ,  70  has an upper end pivoted to carrier  66  at respective pins  68   a ,  70   a  and a lower end pivoted to corresponding posts  71  on bearing ring  40 . Together, the four linkage arms permit carrier  66  to tilt through a continuous arc between a vertical position shown in  FIGS. 7 and 7A  where carrier  66  is axially aligned with bearing ring  40 , crown gear  30  and insert  38 , and a maximum inclined or tilted position shown in  FIG. 4  which in the preferred embodiment is about 40 degrees from the vertical. 
     Two slide arms  76  are fastened to the top end of the carrier  66  on bosses  78  so that arms  76  are fixed at diametrically opposed points on the carrier  66  in mutually parallel relationship and also parallel to the center axis of carrier  66 . Each arm  76  has a slot  78  terminating in an enlarged upper slot end  78   a . A lamp carrier plate  80  has two integrally formed and internally threaded shaft heads  82  which extend each into a corresponding slot  78 . The shaft heads have two flat sides which allow sliding movement along slot  78  but permit rotation of the shaft head  82  only at the enlarged slot ends  78   a , when the carrier plate  80  is lifted away from carrier  66  to the top of slide arms  76 . Thumb screws  84  are threaded into shaft heads  82  for keeping the shaft heads in slots  78 . Carrier plate  80  carries a lamp socket or lamp holder  86  installed in an opening  88  in plate  80 . A socket mounting plate  90  has a central connector  92  mated in electrical contact with corresponding connectors  86   a  provided in the top of lamp holder  86 . A pair of electrical wires  90   a  extend from the top side of plate  90  to a quick-connect type connector  90   b  through which power is supplied to a lamp  106  installed in lamp holder  86 . Mounting plate  90  also has two internally threaded and integrally formed spacers  94 . Mounting plate  90  and carrier plate  80  are held together by screws  96  which pass through corresponding screw holes in carrier plate  80 , then through tubular spacers  98  and into spacers  94 , thereby capturing lamp holder  86  in electrical and mechanical assembly between plates  80  and  90 . 
     A parabolic light reflector  100  has a centrally apertured reflector collar  102  configured to make twist lock engagement with a pair of retainer clips  88   b  held to carrier plate  80  by screws  88   a  and in axial alignment with the lower end of lamp holder  86 , such that a lamp  106  can be inserted through collar  102  and fitted in corresponding electrical contacts provided in lamp holder  86 . 
     Reflector  100  also has a cylindrical rim  104  which makes a sliding fit into top end  66   a  of carrier  66 . In its normal operating position rim  104  is axially inserted into the open upper end  66   c  such that carrier  66  serves as a shroud for containing the light beam projected by lamp  106  and reflector  100  towards and through trim aperture  34 . 
     Carrier  66  together with lamp holder  86  and reflector  100  is tiltable on linkage arms  68 ,  70  to an inclined position relative to the vertical center axis of trim collar  20 , insert  38 , crown gear  30  and bearing ring  40 . A vertical tilt adjustment mechanism is provided for this purpose. 
     The vertical tilt adjustment includes an inverted U support frame  110 , best seen in  FIG. 6   a , with two parallel upright legs  110   a  and a cross member  110   b . The lower ends of legs  110   a  are fastened to bearing ring  40 , as best seen in  FIG. 5   a , by screws  110   c . A vertical threaded shaft  112  has an upper end  112   a  axially captive in a bore through cross member  110   b  but is free to turn relative to frame  110 . A pin block  114  has an internally threaded bore mated to the shaft  112 . Pin block  114  is captive between legs  110   a  of frame  110  such that it cannot turn about the shaft  112  but is free to move longitudinally along shaft  112  in response to rotation of shaft  112 . 
     A vertical adjustment set screw  116  is set in a second bore  118  formed through bearing ring  40 , as seen in  FIG. 5   a . Set screw  116  has a slotted screw head  116   a  recessed in the radially inner end of bore  118 . Screw head  116   a  can be accessed with a suitable hand tool such as a screw driver inserted through trim aperture  34 , as depicted in  FIGS. 9A and 9B . The opposite end  116   b  of screw  116 , on the radially outer side of ring  40 , is coupled to the lower end of threaded shaft  112  by a flexible coupling coil spring  120 , as shown in  FIG. 6   a . The axis of screw  116  may be inclined as shown relative to the center axis of ring  40  such that the slotted head  116   a  of the set screw faces downwardly towards the trim plate opening  22   a , and the opposite end  116   b  extends outwardly and upwardly from the outer side of ring  40 . The coupling spring  120  is bent along its longitudinal axis between the inclined set screw  116  and the lower end of vertical shaft  112  such that rotation of set screw  116  is transmitted by coil spring  120  for turning shaft  112 , thereby linearly displacing block  114  up or down along shaft  112  depending on the direction of rotation of set screw  116  and shaft  112 . A reference mark  122  on pin block  114  lines up to markings along a graduated scale  124  on one leg  110   a  to indicate the current tilt angle of the lamp holder and reflector assembly relative to the vertical axis of the base assembly. 
     A stop pin  124  projects radially inwardly from pin block  114  into a slot aperture  126  formed in the adjacent actuating arm  70 , as best seen in  FIG. 5   a . Stop pin  124  is in interference with a stop edge  128  of slot  126 . A torsion spring  130 , seen in  FIG. 5 , is captive in compression between the other actuating arm  70  and bearing ring  40  and applies a continuous spring biasing force urging arm  70  and carrier  66 , together with lamp holder  86  and reflector  100 , towards a maximum tilted position determined only by the geometry of the mechanism but of at least 40 degree tilt from the vertical in the preferred embodiment. The action of bias spring  130  is limited by abutment of stop edge  128  against stop pin  124 . The tilt angle at which this detent action occurs is continuously adjustable within the range of movement of stop pin  124  along threaded shaft  112 . Raising pin  124  along shaft  112  allows stop edge  128  to travel further along its arc of movement towards a maximum titled position before abutting against pin  124 , thereby increasing the tilt of the lamp assembly. Lowering pin  124  along shaft  112  has the opposite effect, forcing stop edge  128  downwardly and thereby forcing arm  70  to pivot downwardly thus bringing carrier  66  and the lamp/reflector assembly to a more fully upright, and eventually, vertical position on bearing ring  40 . 
     Each actuating arm  70  has a finger hold  132  accessible through trim aperture  34  from the exterior side of trim plate  22 , i.e. from the exterior side of the architectural panel  14  in  FIG. 1 . The finger tips of an extended hand can reach into aperture  34  and curl over finger holds  132  to pull finger holds  132  down towards the bearing ring  40 , thereby overcoming the bias of torsion spring  30  and returning the lamp assembly to an upright, vertical position. Once upright, further downward pulling force overcomes the outward spring force of spring clips  32 , forcing the clips radially inwardly into trim collar  20  and out of spring windows  36 , thereby axially releasing the insert  38  from collar  20  and allowing the entire trim and lamp assembly supported on insert  38  to be pulled down and extracted from recessed housing  12  through trim collar  20  to the exterior side of architectural panel  14 . Once so extracted from its housing, reflector  100  with lamp holder  86  can be lifted from carrier  66  by sliding the carrier plate  88  along slide arms  76  until shaft heads  82  reach the enlarged upper ends  78   a  of slot  78  where the shaft heads  82  can now rotate to tilt the plate  88  and swing parabolic reflector  100  from its normal downward facing position to a side facing condition, shown in  FIGS. 10 ,  a ,  10   b  and  10   c , with the open end  100   b  of reflector  100  presenting lamp  106  for easy removal and replacement. This same condition of the assembly  10  allows access to the interior of carrier  66  through open top end  66   a  for installation, removal or replacement of accessories such as the filter  74  shown in  FIG. 3 . 
     The stop pin  124 , stop edge  128  and torsion spring  130  jointly operate also as a tilt memory mechanism for the lamp assembly  10  by allowing the lamp assembly to be manually pulled to an upright vertical position on the base assembly against the bias of spring  130  for extraction from the recessed housing  12 , as explained above, yet with the bias force of spring  130  returning the lamp/reflector assembly to the same tilted position which existed before this manual uprighting of the assembly as determined by the position of stop pin  124 , once the lamp assembly is released from the pulling force keeping it upright. 
     With reference to  FIGS. 11-14A , an alternate embodiment of the vertical or tilt adjustment mechanism is shown. In the alternate embodiment the stop pin  124  and slot  126  of  FIG. 5A  is replaced with opposing cam surfaces as the first stop and second stop in lieu of the stop pin  124  and stop edge  128  of  FIG. 5A . 
     A cam block  140  is threaded on the vertical screw  112  which is supported in frame  110 , as previously explained in connection with  FIG. 6   a . The cam block  140  has a lip projecting away from screw  112  and towards linkage arms  68 ′,  70 ′, and which defines an undersurface  142 . Linkage arm  70 ′ includes a cam arm  70 ′ a  which carries a cam surface  146  and also carries a cam pin  148 . The cam arm  70 ′ a  may be formed as a casting integrally with cam surface  146  and cam pin  148 . Cam arm  70 ′ a  has a pair of fastener holes  152  through which pass fasteners such as rivets  154  seen in  FIG. 12  to rigidly fasten cam arm  70 ′ a  to linkage arm  70 ′. A hole  156  admits a fastener  158  which anchors the arm section to a post  160  fixed to bearing ring  40 . Fastener  158  also serves as a pivot for cam arm  70 ′ a , allowing the cam arm to swing between a maximally elevated position shown in  FIGS. 12 ,  12 A and a fully depressed position seen in  FIGS. 14 ,  14 A. 
       FIGS. 12 and 12A  show the cam arm  70 ′ a  and the cam block  140  in their maximally elevated position, corresponding to the cam block  140  being located at the upper end of the thread on threaded shaft  112 , and to a maximally tilted position of the lamp carrier assembly. In this condition the undersurface  142  of cam block  140  is in contact with cam pin  148  but is spaced above and away from the cam surface  146  of cam arm  70 ′ a . Rotation of threaded shaft  112  operates to move cam block  140  downwardly towards bearing ring  40 , to an intermediate position illustrated in  FIGS. 13 ,  13 A, pushing down on cam pin  148  and depressing the cam arm  70 ′ a . As undersurface  142  moves down further it engages the upper edge of cam surface  146  causing arm  70 ′ a  to pivot downwardly such that cam pin  148  moves away from the undersurface  142  of cam block  140 , as seen in  FIG. 13A . As cam block  140  is driven still further down along threaded shaft  112 , the point of contact between undersurface  142  and the curved cam surface  146  travels from right to left in  FIG. 13A  to reach a condition illustrated in  FIG. 14A , which corresponds to the cam block  142  being positioned at the lowermost end of the thread on shaft  112  and to a fully depressed condition of cam arm  70 ′ a  which consequently pulls down on linkage arm  70 ′ to bring the lamp carrier assembly to a vertical position relative to the stationary base, i.e, the bearing ring  40 , crown gear  30  and insert  42 . The curved cam surface  146  ends in a flat end surface  162  for better contact with undersurface  142  in a fully upright position of the lamp carrier assembly. The curved cam surface  145  may have a circular radius of curvature, while other curvatures may yield different rates of arcuate motion of the lamp carrier assembly between its tilted and upright vertical positions. It has been found advantageous to provide a slope of between 3-6 degrees to the undersurface  142  rising from left to right in  FIG. 14A  for smoother camming action against cam surface  146 . 
     In a preferred embodiment of the fixture, the lamp carrier assembly tilts to a maximum of 40 degrees, and the cam arm  70 ′ a  is configured such that cam block  140  operates against cam pin  148  as the lamp carrier assembly travels from the 40 degree tilt through about 32 degrees tilt, after which the cam block undersurface  142  comes into contact with cam surface  146  as the lamp carrier assembly travels from about 30 degree tilt through 0 degree or full vertical position, at which point the cam block  140  pushes down against the flat portion  162  of the cam surface. 
     A presently preferred embodiment of the invention has been described and illustrated for purposes of clarity and example only, and it will be apparent to those having ordinary skill in the art that many changes, substitutions and modifications can be made to this embodiment without thereby departing from the scope and spirit of the invention.