Abstract: A trapezium and like structure spring metal hanger clip includes two upwardly extending legs which are interconnected at their lower ends by a short bottom section. One leg at its top includes a generally horizontal arm extending toward the top of the other leg and adapted to be positioned through a hole in the top of the other leg. The horizontal arm is generally channel shape in sectional configuration and the upper edge includes serrations adapted to engage the upper edge of the hole in the top of the other leg, to prevent the clip from being sprung open without the other leg moving upwardly with respect to the arm. The clip may be sprung open in one form and the horizontal arm inserted through the trapezium and like structure and into the hole at the top of the other leg. In this manner both legs are supported by the horizontal arm. In another form, the clip is already open. A nut is snapped into place between the legs at the lower end and held against vertical movement and rotation.

Abstract: A canopy luminaire (10, 110, 210) for mounting by a single individual in a canopy comprises a luminaire housing (12, 112, 212) having a bulbous body (14, 114) configured to receive the light-emitting section of a lamp and a narrow neck (16, 116). Spring clips (26, 124) are secured to opposing sides of the narrow neck (16, 116) and are adapted to support the luminaire (10, 110) from a canopy. A locking component (31) may be attached to the narrow neck (16, 116) to fixedly secure the luminaire (10, 110, 210) to the canopy. The luminaire (10, 110, 210) may also include externally mounted control gear (80), such as the ballast. Further, the luminaire (10, 110, 210) may include a hingedly attached glass lens (42) to permit quick and easy replacement of lamps. Alternatively, luminaire (210) may include a rotatably attached glass lens (240).

Abstract: A track lighting system includes a track snap-on clip attached to a ceiling and forming a downwardly open channel into which a track member can be inserted by a snap action. The clip includes spring arms formed in opposite legs of the channel. When the track is pushed up into the channel, the spring arms are elastically displaced outwardly. When lateral shoulders of the track travel past respective spring arms, the spring arms snap inwardly to underlie the shoulders and support the track. The track snap-on clip can be mounted to the ceiling either directly by means of a fastener, or indirectly by means of another member, such as a T-bar clip or a pendant bracket.

Abstract: An electrical fixture mounting device for hanging an electrical fixture, such as a fan or light, from a suspended ceiling having a criss-cross framework of perpendicular supporting members supported from an overhead support structure. The device includes a box having a closed top, an open bottom, a continuous side wall, and slots in the side wall extending inwardly from the open bottom and configured to engage the supporting members. A wire is fastened at one end to the box and at its other end to the overhead support structure to suspend the box from the overhead support structure.

Abstract: An assembly and method for mounting linear structures in locked longitudinal alignment, which includes retainer bars joinable to a bracket for mounting linear structures and a pin assembly having wedge pins protruding outwardly from a base wherein the wedge pins engage opposing apertures in a locked, spring-loaded interface tightened into alignment by a retainer screw. The locked interface between opposing edges of the wedge pin and the apertures impart strong resistance to displacement forces, thereby providing a system for joining and mounting permitting adjustment and alignment of independently suspended linear structures and subsequent tightening down of the linear structures.

Abstract: A light support assembly for installation and use in a timber construction roof eaves overhang; of the type having a pair of adjoining roof rafters, a facia board, and a soffit board or plane for positioning a soffit board if desired or anticipated; is disclosed. The support assembly is provided with a coupling having a biased channel for firmly sliding and supporting at least two frame tracks for extension and retraction within the spacing provided within adjacently constructed roof rafters in a roof overhang area, and for attachment to each of the rafters. The coupling, then supported by the secured tracks, supports and has attached to it an electric box for receiving lighting or electric fixture or wiring in the roof area where the assembly is inherently designed to be installed.

Abstract: The box support system uses a channel shape one piece slotted strut and a twist spring snap clip. The strut ends are bent opposite the legs of the channel to form spring separable fingers which snap over and lock behind the bulb on the stem of a Tee bar. The slots of the strut are centered transversely providing two equal shelves on each side. The slots are positioned asymmetrically longitudinally so that a box may be supported anywhere between spaced Tee bars. If it will not fit because of unslotted areas, it will fit if the strut test is turned end-for-end. The spring snap clip includes a V-shape body forming a pointed nose. The two legs of the body have shouldered necked portions adjacent outwardly extending feet which terminate in upwardly extending toe tab. Opposite shoulders at the neck include oppositely angled spring locking talons. Box assembly is obtained by inserting the clip through the center knockout in the back of a box with the toe tabs entering two smaller holes on each side of the knockout.

Abstract: This device includes a supporting plate unit to contact a ceiling panel and for supporting one or more objects which project at least partially through the ceiling panel, in which the supporting plate unit comprises at least one supporting plate which is fixed with one or more retaining lips in the ceiling panel, and the supporting plate preferably comprises a triangular section for reinforcing the structure thereof.

Abstract: A device for engaging a remote control unit to a ceiling fan which has a motor for mechanically actuating blades connected thereto and a rod with a head which extends upwardly from the motor, a fixing element fixedly engaged to the floor and having a C-shaped portion for engagement with the head of the rod, a middle plate having a central hole for the rod to extend therethrough and having at least two sockets extending from an underside thereof, the middle plate received in a bowl which has a hole for the rod to extend therethrough and at least two studs extending from a bottom thereof for engagement with the sockets, electrical elements for remote controlling the ceiling fan disposed in the bowl which is engaged to the fixing element by bolts such that the remote control unit can be repaired simply by disengaging the bowl from the fixing element.

Abstract: The invention provides a recessed lighting fixture having an outwardly extending housing flange about a lower end of the fixture housing and retaining clips mounted to the housing wall. The retaining clips have enlarged ends trapped within the housing and extending through axial slots so as to permit axial movement along the housing wall. Each retaining clip includes a spring arm biased to an open position in which the spring arm extends radially from the housing, part of the upper portion being flexible such that the spring arm can be depressed toward the housing wall. The fixture can thus be installed through a ceiling opening barely larger than the diameter of the housing. An adjusting screw is provided for adjusting the position of the retaining clip axially along the housing wall, which secures the housing in place by clamping the ceiling between the housing flange and the retaining clips.

Abstract: An outlet box for mounting a fixture, such as a fan or a light, from a ceiling. Adjustable hanger screw mountings permit the mounting of a wide variety of fixtures to the box. Adjustability is attained by attaching the hanger screw mountings to the ends of a mounting arm which is pivotally connected to a top plate of the outlet box.

Abstract: A truss roof and floor joist storage device which provides access to and creates convenient storage space for a large variety of typically stored items from boxes to sporting equipment to tools and seasonal items. The device includes a large shelf which rotates up between the trusses of a garage or up against the floor joists in a basement. It has an optional pulley to raise and lower the shelf and two latches for safety. It is aesthetically compatible in either finished (drywalled) or unfinished space.

Abstract: A recessed light fixture includes a neuter plaster frame with which is attached components to customize the fixture to specific installations. The components include a junction box with a face plate attachable thereto that has different electrical elements mounted thereon, such as transformer and thermal protectors, a ballast mounting plate that fastens onto the plaster frame by an arrangement of legs and spring clips, and a trim ring that accommodates to the thickness of the ceiling. The bulb socket is held in a socket cup that is fitted with different socket holders depending on the size and shape of the socket, and the hanger bars for the supporting the plaster frame in the ceiling are adaptable for mounting on wood joists or metal suspended ceiling grids.

Abstract: A chandelier frame provides, in one embodiment, a first frame member and a second frame member that are connected by a plurality of arms at joints. The joints are plastically and asymmetrically deformed to locate each of the frame members in axially remote planes. In another embodiment, this invention provides a first and second frame member having arms therebetween that are rotated from a first plane defined by the frame members into a second plane that is substantially transverse to the first plane. The arms are joined to a locking structure that enables the first and second frame members to be maintained in an elastically deformed shape defining, in one preferred embodiment, a bowl-like shape. In another embodiment, a frame member is held in an elastically deformed, stressed state by an arm interconnected with interengaging locking structures on the arm.

Abstract: A device for holding a door upright for painting comprises a bracket that attaches the device to the electrical junction box in a ceiling, a telescoping rigid section held by the bracket, and a pin at the end of the rigid section that engages the top edge of the door. The telescoping rigid section adjusts to different door sizes and different ceiling heights. It also moves to a retracted position from an extended position, so that the door can be easily positioned and removed. In the vertical position, only slight force is needed to hold the door there, force provided in part by the attachment of the device to the junction box. Use of the junction box obviates the need for more elaborate support systems.

Abstract: A light assembly includes a lower canopy for securing a lamp shade and having a socket for engaging with a lamp. A bolt sleeve has a lower portion secured to the lower canopy. A bar is secured to a ceiling and includes two slots for securing a ceiling canopy. Another bolt sleeve is engaged through the ceiling canopy and is engaged with the bar. Two couplers are secured to the bolt sleeves and each has a ring for engaging with a chain so as to form a pendent light. The lower canopy may be secured to the ceiling canopy so as to form an overhead lamp.

Abstract: A recirculation fan portable mounting apparatus is disclosed comprising a generally flat mounting plate having an upper surface and a lower surface. Protruding above the upper surface are a pair of oppositely mounted grasping hooks extending upward there from. The central aperture in the middle of the mounting plate allows for passage of electrical cords through the mounting plate. The eye bolts are then threaded to the under side of the plate at a central location as to eventually impinge a support member between each eye bolt and the tongue portion of the protruded mounting clamps.

Abstract: A simple, low-cost method and apparatus for supporting a lighting fixture, motion detector or the like while it is being electrically connected and mounted on a junction box in a side wall or ceiling. A disposable support link is provided for supporting the weight of the fixture during installation. The support link is easily attachable to the junction box and to the fixture without the need for tools, and can even be attached with only one hand. When the electrical connections are completed and the fixture is ready to be mounted on the junction box, the support link may simply be left in place in the junction box or in one embodiment may be removed with one hand as easily as it was attached. The support link is secured to the back side of the fixture in a position that will face the junction box when the fixture is in its installed configuration on the junction box.

Abstract: The universal attachment clip will act as an attachment device for attaching micro cornice trim to each of the major grid systems. The clip will allow attachment and registration of each of the micro cornice trim profiles to 9/16", 15/15", or bolt-slot grid. The registration of the micro cornice profiles to the grid can be at different angular positions.

Abstract: A reversible escutcheon for a ceiling fixture having a base with first and second opposed surfaces. The base also defines a hole extending from the first surface to the second surface. A first raised edge extends around at least a portion of the perimeter of the base and projects from the first surface. A second raised edge extends around at least a portion of the perimeter of the base and projects from the second surface. The first and second edges are selectively mountable adjacent to a ceiling wherein one of the second and first surfaces is exposed, respectively.

Abstract: A mounting assembly for supporting a ceiling fan from a ceiling includes a support beam located inwardly of the ceiling surface at least a distance t. An electrical box having a bottom wall is directly joined to and supported from said support beam. The box has side walls extending from the bottom wall through the ceiling substantially to the exposed ceiling surface and terminating in an open end. A rigid metal plate or disk member adapted for supporting and mounting a ceiling fan is positioned over the open end of the box. The disk member is of a size sufficient to have a peripheral portion extending radially beyond the side walls of the box; and, a plurality of mounting screws extend from the metal disk member through the interior of the box into connected engagement with the beam for supporting the disk member from the beam without reliance on the electrical box.

Abstract: A cover plate is designed for use in either wall mounting or ceiling mounting applications. The cover plate comprises a base forming a base plane for mounting said plate flush against a support surface. A main body is connected to the base and has a generally flat mounting surface disposed in the plane parallel to the base and a sloped mounting surface inclined with respect to the base plane. A pair of first mounting holes are formed in the flat mounting surface which have an axis substantially perpendicular to the base plane. A pair of second mounting holes are formed in the sloped mounting surface and have an axis disposed at an angle with respect to the base plane. In ceiling mounting applications, lighting fixtures are received in the first mounting holes. Conversely, in wall mounting applications, the lighting fixtures are received in the second mounting holes.

Abstract: A stabilizer for precluding periodic oscillating motion of a ceiling fan. The inventive device includes a ceiling engagement plate positionable against a portion of the ceiling. A fan alignment block is securable to the depending cylindrical support of the ceiling fan and engages the ceiling plate. A plurality of adjustment fasteners engaged to the alignment block can be selectively adjusted to engage the ceiling plate to preclude movement of the cylindrical support relative to the ceiling.

Abstract: A bar hanger used in a recessed light fixture assembly to support the assembly on a support member. The bar hanger has an elongated arm which has its length substantially greater than its width. A mounting ear is fixed on one end of the arm. The mounting ear is adapted to be connected to a fastener to secure the ear to a support member. The arm has a score extending across the length of the arm so that the arm may be selectively fractured at the score to shorten the length of the arm.

Abstract: A mounting assembly for an electrical appliance such as television receiver or the like that has a mounting arm that extends from a mounting bracket affixed to a support surface includes a forced or vibration absorption assembly. This assembly includes an interface member which separates the mounting arm from the mounting bracket and mounting surface and absorbs forces to vibrations and other dynamic loading upon the structure or mounting assembly. The interface member is compressible and permits the mounting arm to have an articulation angle of much greater than would be obtained by a rigid mounting arm rigidly attached to a mounting bracket.

Abstract: A saddle shaped mounting bracket straddles a conventional junction box mounting rail of a grid ceiling system and is used as a support location for hanging a lighting fixture from the grid ceiling. The mounting bracket has a straddle slot extending through the bottom portion of the bracket to allow the bracket to straddle the mounting rail. Threaded studs on the bottom of the bracket provide a means for coupling an electrical junction box to the bracket when the mounting bracket is used at an electrical feed location, or for coupling to other connector bracket hardware when the mounting bracket is used at a non-feed location. Load wires anchored to the overhead ceiling structure are attached to wire holes in the sides of the mounting bracket to provide efficient anchoring of the bracket.

Abstract: A ceiling fan is disclosed comprising a motor having a stator with a top portion and a bottom portion and a rotor having a bottom portion, a down rod secured to the top portion of the stator for suspending the motor from the ceiling, a motor housing enclosing at least a portion of the motor, at least one switch for selectively controlling the operation of the motor, a plurality of blades removably securable by suitable fastening devices to the bottom portion of the rotor, and a switch housing for containing at least one switch securable to the bottom portion of the stator, an upper edge portion of the switch housing being operable to conceal from view at least a portion of the fastening devices used to secure the blades to the motor.

Abstract: An improved ceiling system to be assembled under an existing ceiling. The ceiling system is constructed of materials so as to simulate naturally occurring materials. The support members simulate such items as logs, wooden beams, and the like. Panels between the support member also simulate naturally occurring items like latillas and saguaro ribs. In the preferred embodiment, the support beams are constructed through a casting method and are composed of foam which is then painted to simulate the desired naturally occurring material. In the preferred embodiment of the panels, they are constructed of the same materials so that the resulting assemblage is not only extremely light and easy to install and transport, but, is also less expensive than naturally occurring materials which are becoming scarce.

Abstract: A dispenser and display device is suspended by a ceiling element that is inserted in a drop ceiling in place of a standard drop ceiling panel. The ceiling element has a number of channels formed to run in different directions, so that the dispenser can assume various orientations. The dispenser has a main body that has gravity feed, article-holding trays movably mounted inside so that the trays can be released without removal from the main body. The trays can be rearranged relative to the main body so that dispensing of articles can take place from the front, rear, or both sides of the main body.

Abstract: A simple, low-cost method and apparatus for supporting a lighting fixture, motion detector or the like while it is being electrically connected and mounted on a junction box in a side wall or ceiling. A disposable support link is provided for supporting the weight of the fixture during installation. The support link is easily attachable to the junction box and to the fixture without the need for tools, and can even be attached with only one hand. When the electrical connections are completed and the fixture is ready to be mounted on the junction box, the support link may simply be left in place in the junction box or in one embodiment may be removed with one hand as easily as it was attached. The support link is secured to the back side of the fixture in a position that will face the junction box when the fixture is in its installed configuration on the junction box.

Abstract: A hanger assembly for supporting a vertical load at a selected site flush mounted beneath the underside of a drop ceiling. Comprising the assembly is a pair of bars normally intersecting in T formation and mounted onto the T rails of a lattice framework supporting the individual ceiling panel at the selected site. The bars can be variably positioned so as to intersect at any selected site location and by means of a bracket are permanently secured together with a junction box at the underside of the intersection. The bracket in turn is connected for static loading to a depending chain attached to the building structure above the ceiling and adjustably rendered taut to a predetermined tension by means of a turnbuckle attachment. For supporting an attached load, the load bolts have flat heads with canted ends and depend through apertures in both the top wall and ears of the junction box.

Abstract: A dispenser and display device is suspended by a ceiling element that is inserted in a drop ceiling in place of a standard drop ceiling panel. The ceiling element has a number of channels formed to run in different directions, so that the dispenser can assume various orientations. The dispenser has a main body that has gravity feed, article-holding trays movably mounted inside so that the trays can be released without removal from the main body. The trays can be rearranged relative to the main body so that dispensing of articles can take place from the front, rear, or both sides of the main body.

Abstract: A method for assisting installation of an electrical fixture to a mounted electrical junction box. The electrical fixture carries an electrical device having electrical wires to be coupled to electrical lead wires extending from the junction box. The junction box has tabs carrying threaded attachment holes. The fixture has openings alignable with the attachment holes.

Abstract: A plastic ceiling box assembly adapted to support a ceiling fan thereon and adapted to be mounted on a structural member, such as a ceiling joist. The ceiling box comprises a body member having a lower wall and a pair of side walls defining a recess for snugly receiving the ceiling joist therein. Box mounting holes for receiving box mounting fasteners are located at opposite sides and ends of the lower wall for attaching the ceiling box to the joist. Openings for receiving fan supporting fasteners are formed in the body member adjacent the box mounting holes. Brackets at opposite ends of the body member aid in attaching the body member to the joist. This overall arrangement provides sufficient support and strength to resist dynamic loads of a ceiling fan weighing up to 35 pounds even though the ceiling box is formed of plastic. The plastic ceiling box assembly could be provided with a substantially U-shaped metal bracket for supporting ceiling fans weighing over 35 pounds.

Abstract: A down lighting system for elevator cabs and the like includes halogen lights in standard and emergency light fixtures. Both types of fixtures are connected to the ceiling by a clamp arrangement which is universally adaptable to a wide variety of ceiling types without changing the light housing dimensions. The clamp arrangement fastens light housings against rotation with respect to the ceiling and it is adjustable to different height ceiling configurations merely by connection to different vertical positions of the outer surface of the fixture. The standard fixture includes a halogen bulb with its own reflector. The emergency lighting fixture includes a halogen bulb/reflector unit with the emergency self focusing bulbs concentrically spaced around it. Both light sources pass focused light directly into the space below the ceiling for meeting test point candle power requirements.

Abstract: An extensible hanger support providing a spanning connection between two spaced-apart joists or the like for supporting therefrom such items as ceilings fans, lights fixtures and the like. The support includes first and second extensible members which are telescopically axially movable between a fully collapsed condition and a fully extended condition. These extensible members employ cooperative means which are normally in threaded engagement in such a manner that high speed rotation of one of the members relative to the other results in axial movement toward either the fully collapsed condition or the fully extended condition depending upon the direction of rotation. Each of these extensible members has a free end which carries joist engaging means for respectively engaging a ceiling joist.

Abstract: The disclosure herein describes a light fixture for mounting to a ceiling, wall or the like which comprises a pot having a peripheral edge abutting the area adjacent a hole made in the ceiling or wall. A hook and a bolt extending through appropriate openings in the inner wall and the side wall of the pot cooperate to secure the pot to the ceiling. Rotating the bolt causes the hook to move into an abutting engagement with the rear surface of the ceiling, the latter thus being contacted, on the outside, by the peripheral edge of the pot and, on the inside, by that portion of the hook engaging the rear surface of the ceiling.

Abstract: A battery-operated rotating sign employs a mechanically efficient speed-reducing mechanism and a power controller to reduce power consumption and, hence, increase battery life. The device is particularly suited to a ceiling-mounted, vertically-suspended rotating sign. A resilient power transmission strand extends from the vertical shaft of the motor to the sign which hangs from the bottom end of the strand. The power controller includes electrical circuitry having a timer which cycles between "on" and "off" periods. During the "on" period, the rapidly turning motor shaft winds up the resilient strand; and during the "off" period, the energy stored in the strand is released to the sign which turns slowly at the opposite end of the strand. Additional energy savings are provided by a photodetector circuit which disconnects the battery at night when operation of the sign is not desired.

Abstract: An apparatus for hanging suspended ceiling structures from an overhead surface, such as a spanning joist or beam, includes a fastener adapted for adjustable securement into the overhead surface and a flexible, elongated, suspension wire having a first end for attachment to the fastener and a second end for attachment to the suspended ceiling structure. Integrally formed from the wire at the first end are a plurality of adjacent coils which are adapted to encompass the fastener. The coils loosely contact the fastener so that free rotation of the fastener, for selective adjustment in the overhead surface, can be accomplished without turning and binding the pendent wire.

Abstract: A load support system includes a support beam. The support beam extends along a longitudinal axis and has two outwardly facing generally U-shaped framing channels separated by a web. The ratio of the depth of at least one framing channel to the height of said web is approximately 2. A support beam with at least one of the framing channels having this ratio has several advantages. It is stronger and provides for a larger variety of attachment devices to be inserted. Further, when used with respect to various channel support systems, additional support is provided under certain loading conditions.

Abstract: The invention provides a roof lifeline anchor device for attachment to and between adjacent roof trusses of a building. The anchor comprises an elongated beam having roof truss attachment structure located at each end and a lifeline attachment structure centrally located along the beam. The device attaches to roof trusses in such a manner that forces exerted on lifelines connected thereto will be directed through the anchor into the truss assemblies and be spread across two or more trusses. In the preferred embodiment, the device is fabricated from a steel box beam and the truss attachments are stirrups fabricated from sheet steel sized to fit over the beams of a roof truss. This preferred form is fitted to the truss assemblies from beneath and secured to the trusses by bolts passing through the stirrups and the truss beams so that forces on the lifelines tend to pull the anchor upward against the truss beams.

Abstract: A track-mounted lighting fixture including a track mounting device having a split extended from a horizontal top mounting channel to an outer thread thereof, a lock nut threaded onto the outer thread, and a connector to connect a lamp holder to the track mounting device, whereby the pitch is enlarged for allowing the track mounting device to be mounted on an overhead track as the lock nut is turned in one direct; the pitch is shortened for allowing the track mounting device to be firmly retained to the overhead track as the lock nut is turned in the reversed direction.

Abstract: An apparatus for installing a cubicle curtain or IV track on a dropped ceiling constructed with standard tee-bars and lay-in tile includes a sliding channel member for sliding engagement over the track, and a clip device secured to the upper wall of the channel member for engaging over a ceiling tee-bar. The channel member can slide along the track and the clip device can slide along the tee-bar for positioning the track, before fastening the track in position. The clip device in one version includes a vertical support for direct attachment to ceiling or roof wires, where additional support is necessary.

Abstract: Supports for a junction box in a suspended ceiling. Two supports comprised of two, four-sided pieces of metal the length of a ceiling panel are secured to the suspended ceiling frame and to the sides of a junction box so that the junction box is held in position securely. The support also resists upward movement of the ceiling panel so that it does not rise when the light fixture is fastened to the junction box.

Abstract: A housing for mounting electrical fixtures behind surfaces such as walls and ceilings, includes a surface flange and a plurality of pairs of axially directed slots in the side wall. When inserted in a hole in a ceiling or wall until the housing flange is flush with the wall or ceiling surface, a pair of spring elements are compressed and inserted through a pair of slots which allow the springs to bear against the slot and interior surface of the ceiling or wall to hold the flange flush.

Abstract: A two part tubular wall or ceiling hanger mounted behind the same having means to determine the correct height from wall or ceiling and carriage bolts to fit square holes for easier assembly of the hanger plate or pan.

Abstract: A mounting device for hanging lighting fixtures from a ceiling. A quick connect hanger assembly having a universal design which is readily adapted to different suspension media. The assembly includes a suspension media adapter and a separate hanger bracket.

Abstract: A unitary vent and duct assembly for installation within a framed section of a suspended ceiling structure comprises a cowling having a substantially closed top end and a substantially closed bottom end. The bottom end of the cowling is covered with a foraminous grill that allows passage of air into or out of the assembly. The assembly is sized to fit within a framed section of a suspended ceiling structure and has a plurality of spring biased barb bearing clips arrayed about its periphery. A semi-rigid flexible and lengthwise expandable duct is coupled to the top portion of the cowling and communicates with the interior thereof. In use, the vent and duct assembly is pressed into place within a framed section of a suspended ceiling structure, whereupon the peripheral clips engage and fasten to the struts of the ceiling structure to hold the assembly firmly but releasibly in place. The flexible duct can then be pulled away from the cowling and toward a main supply or return duct to which it is to be coupled.

Abstract: A three-dimensional adjustable ceiling suspension for a surgical microscope includes a first platform for holding the surgical microscope and a second platform connected to a ceiling disposed above and in spaced relationship to the first platform. Six extendable connecting elements interconnect the two platforms. Six lower articulating joints connect the connecting elements to the first platform and six upper articulating joints connect the connecting elements to the second platform. The lower articulating joints are disposed on the first platform along an imaginary first circle and the upper articulating joints are disposed on the second platform along an imaginary second circle. A plurality of drive units are connected to corresponding ones of the extendable connecting elements. A computer-supported drive makes it possible to freely select the position of the surgical microscope as well as realize a rotation and inclination about an imaginary fixed point lying in the center of the object field.

Abstract: An electrical junction box for supporting a hanging load includes a base plate and a sidewall extending from it. The base plate has a pair of square bolts holes at opposite positions next to the sidewall. The sidewall has a pair of tabs bent inward, each tab having a bolt hole aligned with one of the square bolt holes. A square necked carriage bolt extends through each square bolt hole and its aligned tab bolt hole, with a lock nut on each of the bolts for supporting the hanging load. A spacer sleeve surrounds each of the bolts, between the base plate and the tabs, forming a rigid structure when the nuts are tightened. The sidewall further includes mounting holes for side mounting of the junction box for a supporting structure, permitting flush mounting of the box relative to a ceiling.