Abstract: In a surgery lamp with at least one arm which is divided by several uniaxial joints consisting of several parts, a lamp head being fastened to its one end, and its other end is held stationary, the arm has a spring counterbalance for counterbalancing the lamp head when it is moved; the locking of the joints is electrically variable, and the release for adjustment followed by locking is performed through a switch. The joints are constructed with a sealed channel disposed in one joint member concentrically with the joint axis filled with an electroviscous fluid into which projections of the other joint member reach. The annular channel and the members form a pair of poles for the application of a voltage to the electroviscous fluid, whereby the joint members can be rendered relatively immovable.

Abstract: A surface luminous lighting unit has a light panel comprising a plurality of light guiding plates laminated in different lengths. The longer side of the light panel is made shorter than the distance between filaments of a lamp, and longer than the distance between the portions where a luminance of the lamp is equal to 75% of the maximum luminance of the lamp. The surface luminous lighting unit comprises a light guide which comprises a plurality of light guiding plates in different length laminated in such a manner that the sides of those plates where light enters are made level with each other, where the other sides thereof are arranged in a step-like. A linear light source is affixed to the light entering side of the light guide, and a reflector is affixed to the light exiting side of the light guide in such a manner as to extend thereover.

Abstract: A light table includes a housing extending in a horizontal direction having legs extending downwardly therefrom. The housing defines X- and Y-axes and has an X-Y grid pattern formed thereon and visible from above the housing. A lighting system is used to illuminate the grid pattern. A frame extends vertically upwards from the housing and defines a Z-axis having an X-Z grid pattern formed thereon. A second lighting system illuminates the grid pattern on the vertical frame.

Abstract: The apparatus is a light fixture with end reflectors inwardly adjacent to and at an acute angle to the shorter ends thereof. A U-shaped fluorescent bulb is inwardly adjacent to the end reflectors and at a similar acute angle to the shorter ends of the light fixture. Front reflectors rise at a gentle angle at points inwardly adjacent from the bulbs and meet at an apex therebetween. An upper reflector is inwardly adjacent from the top of the fixture.

Abstract: A transparent drawing board and supporting light box combination. The light box has a housing with a source of light and a translucent light diffuser positioned on an angle with respect to the base of the drawing board. A rectangular, transparent drawing board has four soft support strips which fit within a peripheral wall formed about the sides of the translucent light diffuser. This permits the transparent drawing board to be securely held on the angled top of the light box and also permits the transparent board to be lifted, turned, and again supported on the upper edge of the peripheral wall. The transparent drawing board extends past the four soft support strips so that it may be easily lifted from the light box.

Abstract: A graphic arts work center comprising a box having a bottom wall, upright side walls, and an associated frame; a light diffuser plate carried by the frame to overlie the bottom wall and define therewith an illumination space; illumination structure in the space to illuminate the underside of the diffuser plate; and a cover retained by the box to overlie the plate and to be upwardly removable to expose the plate for transmitting light to work placed over the plate; the box having auxiliary receptacle structure for storage of equipment usable in conjunction with use of the work placed over the plate.

Abstract: A task light is disclosed which has a base which is releasably securable to a support surface. A light reflector cavity is shaped to provide different zones of light intensity. A longitudinal light source is positioned within the cavity and a peripheral rim member of varying surface area about the lamp base serves to diffuse the light by reflecting a portion of the light and allowing a portion of the light to pass therethrough. The light reflecting cavity has a particular profile for providing a desired light distribution and is angled relative to the base, which is also of a particular shape having varying sized sidewalls to enhance the light distribution. In a preferred embodiment, the base, the peripheral rim and the light reflecting cavity all cooperate for ease of assembly and manufacture of the components.

Abstract: An operating theatre lamp, for lighting a site of an operation from above, comprises at least one light source, followed by a reflector arrangement (3) which concentrates the light beams issuing from the light source on the site of the operation and by at least one infrared filter (41) which absorbs and/or reflects the predominant portion of the thermal radiation, and which preferably also filters out ultraviolet radiation components. The lamp further comprises at least one closure plate (5) which covers over the reflector arrangement (3) from below and is preferably made of a structured glass which irregularly refracts the light, the radiation of the light source (2) being in particular directed in a predetermined solid angle outwardly towards the reflector arrangement (3), the latter deflecting the light beams (20) downwardly onto the closure plate (5) and towards the site of the operation (7).

Abstract: The illumination system as a part of an optical inspection system, the total inspection system itself, and the method of illuminating and inspecting a workpiece. The illumination system is computer controlled as to a level of intensity and adjustable as to angle of incidence. The illumination system includes illumination control electronics, a quad quartz halogen lamp array light source, a fiber optic line converter and an illumination collection system, having a collimator lens array and a focusing/field coverage lens. As a result of the present invention, determinations of false defects on the PCB are minimized. Human contact with the PCB is also minimized and the rate of inspections performable is increased.

Abstract: The apparatus is a modular medical lighting system which includes a ceiling-mounted reading light module, examination light module, ambient light module, and a night light module. The reading light is directed toward a selected reading area on a hospital bed directly below the medical lighting system. The examination light illuminates the entire top surface of the hospital bed. The ambient light directs light to a wall abutting the head of the hospital bed thereby providing reflected light to the vicinity of the hospital bed. The night light directs light to a selected side of the bed so as to light a nurse's medical chart clipboard without disturbing the patient. The modules may be provided separately or in combination.

Abstract: A digitizer tablet is provided in which the working surface is illuminated by a light source which includes optical structure located over the grid or electrode array of the position determining structure of the digitizer to provide a surface-lit tablet, or beneath the grid or electrode array to provide a back-lit tablet. Preferably, a space is provided adjacent the working surface to reduce undesirable lighting effects. A fiber optics panel or an electroluminescent panel may be used as the optical structure placed above or beneath the grid to illuminate the working surface. The position determining structure and the optical structure may be integrated into a single unit to form a digitizer with an illuminated working surface, or the optical structure may be provided as a separate unit for use with a digitizer to provide an illuminated working surface for the digitizer.

Abstract: A combined work station and phototherapy unit in which the fixture containing the light source is mounted on a vertical support to be placed on the base of the open area for work to be performed, the fixture being at an angle, preferably in the range of 30.degree.-60.degree., so that the user will not be staring directly into the light from the fixture. There will be light both impringing upon the eyes of the user for photobiological effect and also light will be directed to the work area.

Abstract: A task light panel for use with a light source for illuminating a work surface. The panel comprises an upper surface having a plurality of transverse grooves formed thereon and a lower surface having a plurality of longitudinal grooves formed thereon. The transverse and longitudinal grooves are substantially perpendicular to each other and are adapted to distribute light from the light source onto the work surface, reduce glare or veiling reflections from the work surface, and block direct viewing of the light source by an individual using the work surface.

Abstract: A lamp, which has a light source and a fiber-optic light guide that is led, over part of its length, in the housing of a sewing machine, and whose end piece projects from the housing, is to be arranged on the sewing machine such that a desired machine part can be illuminated without the work area and the field of view of the sewing machine operator being disadvantageously affected by the lamp. To achieve this, the end piece of the fiber-optic light guide is adjusted to the shape of a housing part and is received on the housing part, hidden by the side of the housing part facing away from the housing.

Abstract: The apparatus is a modular medical lighting system which includes a ceiling-mounted reading light module, examination light module and ambient light module. The reading light is directed toward a selected reading area on a hospital bed directly below the medical lighting system. The examination light illuminates the entire top surface of the hospital bed. The ambient light directs light to a wall abutting the head of the hospital bed thereby providing reflected light to the vicinity of the hospital bed. The modules may be provided separately or in combination.

Abstract: A portable light and table provides a caster-mounted work/storage table having an angularly-adjustable light panel attached to its table surface. One side of the light panel bears at least one work table light (preferably incandescent bulb-type) that can be generally directed to illuminate the table surface, and the other side of the light panel bears at least one work area light (preferably fluorescent bulb-type), which can be simultaneously adjustably directed to illuminate a work area adjacent the work/storage table.

Abstract: An automatic focus position adjusting unit for use in a shadowless lighting device for medical purposes includes a sensor, a start switch, a start processor, and a direction adjuster. The unit also includes a focus mover, a peak detector, and an adjustment completion unit. The shadowless lighting device for medical purposes has a housing, illuminating bulbs arranged in the housing, and a drive system for inclining the illuminating bulbs so that the optical axes of the illuminating bulbs may converge, and form a focus, on a predetermined position along a focus moving axis. The automatic focus position adjusting unit permits, with a simple operation, an accurate focus position adjustment at a desired position. This is because it is possible to move the focus to a position at which the amount of light, reflected from the predetermined region at the center of the range of light, becomes a maximum.

Abstract: An apparatus for "color mode switching," which enables duplication of daylight chromaticity for each color family. The present invention emits a selected spectral distribution of light which duplicates the effect of daylight, on a color-by-color basis. This effect is accomplished by a specific arrangement of specialized fluorescent and incandescent lamps which are switched (on/off) in a different pattern for each color family. The device has application anywhere color matching is required, including the after market for automobiles.

Abstract: The apparatus is a medical lighting system which includes a ceiling-mount reading light, examination light and ambient light. The reading light is directed toward a selected reading area on a hospital bed directly below the medical lighting system. The examination light illluminates the entire top surface of the hospital bed. The ambient light directs light to a wall abutting the head of the hospital bed thereby providing reflected light to the vicinity of the hospital bed.

Abstract: A task light including an aperture fluorescent lamp, a housing surrounding the lamp and having an opening aligned with the lamp aperture, and a reflector on one side of the housing opening for redirecting light back to the plane of illumination of the lamp to create a longer, more uniform illumination field for evenly illuminating a subject and acting as a direct-glare preventing visor.

Abstract: Digitizer tablet and digitizer tablet structure having an illuminable working surface are disclosed. A space between a top translucent layer having the working surface and a source of light is provided so as to eliminate or minimize undesirable lighting effects at the working surface. In the preferred embodiments, the space is an air gap (e.g. 0.060-0.250 inch) immediately adjacent the top translucent layer. The air gap is formed by transparent optical fibers or solid glass or acrylic rods. Back-lighted, translucent, back-lightable (without light source) and surface lighted digitizer tablet embodiments are described.

Abstract: An optical device comprising a sheet of optical fibers having different lengths so that the fiber ends are distributed uniformly over a given area. The device is mounted in a digitizer tablet above or below its electrode array. When light is pumped into the free fiber ends, a pattern of light spots are formed which can be spread out to illuminate the tablet's working surface. When driven by a light pen, a similar optical device can be used to locate the light pen for menu-picking functions.

Abstract: A lighting system is described for the uniform illumination of restricted working surfaces in which a large area reflector is used which partially spans the working surface and which is for example positioned above the head height of a standing person. This large area reflector is mounted on a vertical support which simultaneously carries the light source required to irradiate this large area reflector.

Abstract: An apparatus is disclosed for digitizing positions on a transparency. The apparatus includes a cool light box and an acoustic digitizer.

Abstract: A backlit digitizer tablet providing uniform illumination of the working surface, comprising biaxial fluorescent lamps supplying wide-area light emission under a sandwich top construction including an apertured shield electrode, a first clear spacer, an electrode array, a second clear spacer, and a translucent top, with optically transparent support means for the top.

Abstract: An illuminating device comprises a light-condensing block forming a transparent pillar member having a greater refractive index than the ambience and having a cross-sectional shape forming a part of an ellipse, and a light source disposed axially of the pillar member in a focal plane containing one focus of the ellipse for illuminating an object through the light-condensing block.

Abstract: A multi-beam surgical lighthead includes a central pod and multiple peripheral pods mounted on pivots and mechanically linked to provide synchronized adjustment of the convergence portion of the peripheral lighthead upon the axial beam of the central pod. This mechanical linkage is operated by handles mounted both axially and transverse the lighthead.

Abstract: A series of enhancements to a digitizing pad, information overlay and input selector, which are used as input devices for many computer-aided design programs, eliminating operator fatigue caused by conflicting lighting requirements, viewing levels and focusing distances required for the digitizing pad and computer screen. The use of fluorescent color for symbols on the information overlay, illuminated by black light, provides an information overlay which can be used in the same low light which is best for computer screen reading and which closely simulates the background and contrast of the computer screen. The active area of the input selector, called the window, is also outlined in fluorescent color to facilitate use in the low light environment. The information overlay is viewed through a mirror which can be adjusted to the same height as the computer screen.

Abstract: An ergonomically adjustable multiple VDT display workstation for use in multiuser facilities. It is particularly applicable to VDT display and use, but it may be used for any equipment that can advantageously utilize its structural and functional features. The workstation includes modules assembled to provide four or more embodiments of the workstation. The modules are comprised of a base, worksurface, first and second tier display housing modules, as well as including a light module and a light canopy. The workstation provides a full range of adjustability, for worksurface, keyboards, and display equipment. The workstation fully integrates VDT units and state of the art ergonomics with task and ambient lighting.

Abstract: A lighthead assembly includes a plurality (three) individual pods with spotlights pivotally mounted symmetrically around an adjustment post. The post carries cam surfaces linked to the pods for synchronous tilting of the pods by rotation of the post. The post may be rotated directly by an axial handle or remotely by means of mechanical linkage.

Abstract: A portably writing box usable primarily by children during long automobile trips. The writing surface is illuminated by three separate lamp mechanisms arranged along three different edges of the writing surface. Light rays are directed onto the writing surface from three different directions, thereby eliminating shadows that might otherwise be generated by a single light source located only long one edge of the writing surface. The writing box preferably includes a transistor radio on the lid of the box, such that the child can choose between writing on the writing surface or listening to the radio.

Abstract: Illumination devices for an inspection system which holds the article to be inspected in a particular location and having light emitting diodes disposed in a part spherical array to cause light to converge upon a restricted field of view in which the article is located. The device is of particular use for illuminating small articles which need to be inspected. The light emitting diodes are preferably operated selectively in groups to provide different light patterns upon the article under inspection.

Abstract: A light table work station is provided for use in combination with a transparent prototype circuit board. At least a portion of each circuit trace on a circuit board is viewable when the board is populated with components, and back lit when the board is positioned on the work table, and each trace is also accessible from each side of the circuit board for examination, testing and/or modification. A work station is provided with a second upstanding light table for retaining transparent artwork sheets, each sheet bearing a copy of the circuit traces for each respective circuit plane on the circuit board.

Abstract: A light source device for use in a medical apparatus has a turnable or linearly movable member or flange provided in a housing, and an actuator removably attached to the movable flange and carrying two light sources thereon. The actuator has two connector plugs provided thereon which are connected to the two light sources respectively, while the movable member is provided with two corresponding connector sockets. The two connector plugs and the corresponding two connector sockets are coupled and separated together when the actuator and the movable member are coupled and separated together. The device further comprises light conductor means for guiding light from one of the light sources to an object to be illuminated, and switch means connected between a power source and each connector socket. The device is arranged such that one of the two light sources is positioned opposite to the inlet of the light conductor means by moving the movable member coupled with the actuator.

Abstract: A fluorescent illuminator including a fluorescent lamp, a lamp housing, and a lamp power supply with a variable current output with a relatively fixed frequency at least an order of magnitude greater than line frequency and a non-integral multiple thereof. There are means for connecting the power supply to the lamp and also means for varying the current output of the power supply between a first, lowest level and a second, highest level to change the light intensity of the fluorescent lamp.

Abstract: A head mounted apparatus for illuminating a work site, and for transmitting a visual image of the work site to a remote location for viewing on a television screen. A camera and a light source are mounted on a head band which is worn by the user. The camera lens is disposed generally between the eyes of the user to allow viewing of the same image as the user is seeing. The light source is disposed slightly above the camera, and is coupled to a remote light source by a fiber optic cable. The light source and the camera are independently pivotally mounted on a bracket, and the bracket is pivotally mounted to the head band.

Abstract: A counterbalanced arm assembly is disclosed which includes a mounting bracket and a first arm pivotally connected to the mounting bracket along a first pivot axis. The first arm includes an inner arm located within it which is pivotally connected to the mounting bracket along a second pivot axis. A spring carrier is located near the first pivot axis and a tension spring is connected between the carrier and the bracket. The spring carrier includes a lower end defining a pair of spaced bearing surfaces located respectively to engage a pair of bearing surfaces on the bracket, with the spring biasing the bearing surfaces into engagement and providing the counterbalancing forces for the arm assembly.

Abstract: A light fixture providing normalized output. An undirected light source is located in an optical cavity having an optical window. A film with a smooth surface and a structured surface is placed in the optical window with the smooth surface facing the interior of the optical cavity. The structured surface has a plurality of triangular prisms thereon.

Abstract: A light fixture mounts on a pair of support bars which are disposed directly below a shelf and extend transversely thereof so that the bar ends are supported on edge channels associated with the shelf. The light fixture has, on the ends of the fixture housing, mounting brackets for engaging the support bars. The mounting brackets are adjustable relative to the housing to vary the angular position of the light fixture.

Abstract: A system includes a power supply unit adapted to provide power from a separate backup source of power to a computer in the event of an interruption in a primary source of power, the unit having a size and shape adapted to be set on a support surface in a position above a keyboard utilized to provide input to the computer. An illumination panel, including at least one lamp on the power supply unit, illuminates the keyboard when activated, and a control circuit activates the illumination panel utilizing the backup source of power when there is an interruption in the primary source of power.

Abstract: A counterbalanced arm assembly is disclosed which includes a mounting bracket and a first arm pivotally connected to the mounting bracket along a first pivot axis. The first arm includes an inner arm located within it which is pivotally connected to the mounting bracket along a second pivot axis. A spring carrier is located near the first pivot axis and a tension spring is connected between the carrier and the bracket. The spring carrier includes a lower end defining a pair of spaced bearing surfaces located respectively to engage a pair of bearing surfaces on the bracket, with the spring biasing the bearing surfaces into engagement and providing the counterbalancing forces for the arm assembly.

Abstract: An adjustable ring light for concentrating multiple beams of light in which the point of convergence can be moved along an axis. In an embodiment, the light sources which may be the ends of bundles of optical fibers, are mounted in tiltable carriers which are adjusted by rotation of a housing cover. In other embodiments tilting is accomplished by bending tabs or rotating a disk having slots through which the light sources project.

Abstract: A container adapted for insertion into a device is disclosed wherein the container has fitted into its hollow interior the components required to form therein and eject therefrom a chemiluminescent light emitting material upon impact of the device.

Abstract: A freestanding luminaire includes a floor-supported frame having a base adapted to rest on the floor, an overhead beam arrangement and an upright member connected at its lower end to the base and at its upper end to the beam arrangement so as to support it in a cantilevered fashion over a work surface. The beam arrangement includes a central longitudinally extending beam and a plurality of cross beams attached to the central beam at spaced locations therealong and extending in transverse relationship to the longitudinal extent of the central beam. The central beam is attached at one end to the upper end of the upright member of the frame and extends in transverse relationship outwardly therefrom. The luminaire also includes a plurality of lamps being preferably of the type which use fluorescent tubes, mounted to and extending between the cross beams.

Abstract: A measuring and/or color matching table having a sheet support surface, including a device for assessing printing quality of a printed sheet deposited on the sheet support surface, and a lighting fixture disposed above and spaced from the sheet support surface, the table having a front side from which the device is operable by an operator, a front part of the sheet supported surface facing towards the operator at the front side of the table and being inclined upwardly at an obtuse angle to a rear part of the sheet support surface.

Abstract: A light table for use in tracing drawings, figures and the like includes a molded unitary housing structure forming an open top chamber with a peripheral support frame on which is mounted a transparent planar sheet or panel of glass or similar support material covering the majority of the open top with a tool tray disposed at one end of the housing for containing artists' or draftsmens' tools and instruments, and adjustable legs are positioned at the four corners of the housing and are adjustable to adjust the slope of the table and to define a right or left handed orientation of the table.

Abstract: A lighting fixture having a plurality of light source means arranged circumferentially around the axis of symmetry of the lighting fixture and a reflector system for folding and mixing the light emitted from the light source means to provide a single beam to simulate the light emitted from a single light source means. The light rays converge at an acute angle relative to the axis of symmetry to provide the single beam. The reflector system includes a plurality of source reflectors, each being operatively associated with one light source means, a second reflector positioned beneath the plurality of source reflectors to receive light therefrom in an overlapping fashion, and a third reflector radially spaced and partially circumscribing the source reflectors and the second reflector to receive light from the second reflector and to project that light to form the single beam.

Abstract: A shadowless lighting equipment for medical use includes an illuminating device for emitting a wave beam such as an infrared ray beam subjected to frequency modulation on a patient on an operating table so as to form an irradiation area thereon, an image forming device which forms an image of the irradiation area in accordance with a wave beam reflected from the irradiated portion of the patient, and a sensor for comparing information regarding an image forming position by the image forming device with information regarding a light concentration position of a lighting device. In this comparison, when the image forming position is spaced apart from the light concentration position, an output containing information regarding the positional difference between the positions is provided, and, in response to such an output, the lighting device is driven in the X axis, Y axis, and perpendicular directions of a coordinate surface so that the light concentration position becomes the same as the image forming position.

Abstract: A mechanical arm has a free end that can be positioned in an almost infinite number of locations relative to a fixed end. The mechanical arm may be used as a free position lamp. The arm is free standing in the location without the use of counter balance or springs. The arm comprises a fixed end base and a free end portion with a pair of spaced apart separate link members therebetween, each link member is substantially the same and each has a first goose neck portion with a rotatable connection to the fixed base, a first rigid rod between the first goose neck portion and a second goose neck portion and a second rigid rod between the second goose neck portion and a rotatable connection to the free end portion, a first flexible spacer between the first rigid rods in the pair of link members and a second flexible spacer between the second rigid rods in the pair of link members.

Abstract: Two embodiments for an illumination system for a keyboard. One embodiment includes a channel located longitudinally between a visual display screen and its lower keyboard. An illuminator is mounted longitudinally in the channel so that light emitted is directed only to the keyboard and the work surface, avoiding illuminating the screen. The other embodiment includes a free standing keyboard illuminator including a housing sized to span a keyboard. The housing includes two contiguous, longitudinal sections with the first front section including a light source with a diverter to shed light only on the keyboard. The second back section includes a counterbalancing weight in relationship with the first section.