Abstract: Output protection for arc discharge lamp ballasts is provided by applying sampled ballast current to a burden capacitor selected to present a low impedance across the winding to a substantially symmetrical waveform of the sample current. Asymmetry between the positive and negative half-cycles of the sample waveform, such as partial rectification caused by abnormal lamp operation, results in charge buildup across the capacitor. Sufficient charge buildup actuates a ballast disabling switch such as a silicon controlled rectifier.
Abstract: A perpetual calendar has a free standing or wall hung structure supporting an anchor point and a number of concealed magnets. A pointer magnet is attached by a line to the anchor point. Attraction between the pointer magnet and a selected one of the concealed magnets can support the pointer magnet and line in levitation against gravitational pull. The concealed magnets may be arranged in an arc on the calendar structure, with day, month or year data indicated along the arc at locations corresponding to the concealed magnet locations, so that the line and pointer magnet serve as a visual indicator of selected calendar data. Multiple displays of calendar data may be provided on a calendar structure, including multiple levitated pointer displays or combinations of levitated displays and sliding pointer displays.
Abstract: Film set lighting requirements can be met with a relatively small number of lamp head modules which are assembled to any of several different reflectors to make up combinations of lighting fixtures as the need arises. The lamp head module has integral ultraviolet protection provided by a close fitting transparent lamp cover so that HMI lamps may be safely used without other UV protection on the interchangeable reflectors. An HMI lamp igniter is provided in the housing for powering different lamp wattages. The lamp head module is wired to power either incandescent or HMI lamps depending on the power cord connector used. The lamp head module is sealed for use in wet environments including underwater use.
January 25, 2000
Date of Patent:
August 7, 2001
Vincent Mario Pace, Patrick Hugh Campbell
Abstract: Hand, knee and elbow orthosis each have a deformable semi-rigid stiffener having two end plates joined by a narrow midportion and contained between thin foam sheets to make an insert. A finger separator may be attached and adjustably positioned on the hand orthosis. The finger separator may include a plurality of upstanding partitions and an elastic element for releasably securing the separator to the orthosis.
Abstract: Cards, labels and the like containing embedded microcircuits or other elements are fabricated in a continuous process by introducing microcircuits between ribbons of extruded material, pressing the ribbons into adhesion with each other while in a plastic state thereby to make a continuous composite sheet containing the microcircuits, cooling the composite sheet to solidify the extrudate material, and cutting out cards from the composite sheet, each card containing a microcircuit. The microcircuits may be introduced between the extruded ribbons on a continuous carrier sheet which may also serve as a printed circuit substrate for the microcircuits. Alternatively, the microcircuits are inserted as discrete units between the extruded ribbons by a suitable robotic device.
Abstract: An adjustable resistance orthopedic splint has two arms hinged to each other, each arm having two parallel spaced apart tubular segments joined by an application pad. A cable stretched between the arms is contained in the tubular segments and partially wrapped around the hinge. The cable is held under tension by an adjustable spring assembly to apply a variable torque urging the arms apart towards extension about the hinge.
Abstract: A buck derived isolated DC-DC converter includes a half or full bridge of switching devices which are asymmetrically controlled so that top and bottom switches are opened and closed at mutually exclusive times. Primary side and secondary side DC blocking capacitor(s) and a small valued inductor are placed in series with an isolation transformer. A single secondary rectification uncontrolled switch and inductor-capacitor output filter are included. Additionally a voltage clamping circuit is added across the rectifier which includes an active switch which also may be connected to a tap on the output inductor.
Abstract: A fault protection circuit for fluorescent lamp ballasts cuts off ballast power to the lamp in response to fast rise-time changes but not slower changes in either current output or voltage output of the ballast. The fault protection circuit is compatible with different ballast circuit topologies and features a floating reference level which renders the circuit insensitive to the lamp load wattage, making the circuit particularly useful in so-called universal ballasts.
Abstract: A hair growth formulation. The two basic main ingredients are castor oil and a special lemon extract. The special lemon extract is made from fresh lemon peel. The peel, including the bioflavonoids membrane, is blended with purified water until it is liquidified. Then the mixture is filtered through a sanitized cloth. Other ingredients that have been found helpful include: inositol, choline (from bitartate), niacinamide or nicotinic acid, manganese in chelated form, bioflavonoids, and folic acid. Finally perfume and sodium benzoate (as a preservative) can be added.
Abstract: A quick connect splice for concrete reinforcement bars includes two diametrically opposed half-shells spanning the aligned ends of the rebars. The half-shells interlock with raised ridges on the bar surfaces to hold the bar ends together. Two sleeve elements slipped over the bars are screwed to each other over the shell sections to secure the splice joint.
Abstract: A reinforced paperboard box for storage and shipping of elongated items is described. The box is formed from a single piece of paperboard and may be rapidly assembled without the use of tools. The box comprises an elongated rectangular bottom panel, first and second joined side panels, a top panel, a front reinforcing panel and dividing partition all foldably joined at elongated edges and constructed to form a multi-level elongated box. The first side panel has a pair of abutting end panels foldably joined to either end, with a tab receiving panel and a locking panel foldably joined to either side of the end panel. The second side panel has a pair of end panels foldably joined to either end, that are locked in place by the locking panels and tab receiving panels of the first side panel.
Abstract: A cable clamp may be constructed from a hollow body, a wedge-shaped member and a means for dislodging the member from the body. The body includes a tapered channel that is sized and shaped to accommodate the member and round, flat or rectangular cable sections. The means for dislodging the member include an aperture extending from one side of the member to the other, at least one cylindrical bearing surface positioned at the upper end of the body, and a camshaft. The camshaft has at least one cylindrical end with an inward facing end and an outward facing end. A cylindrical shaft in orthogonally and eccentrically mounted to the inward facing end. The camshaft is positioned so that the cylindrical shaft will bear against the inner surface of the aperture and the end portion will bear against the bearing surface. When the camshaft is rotated, the cylindrical shaft will cause the aperture and the wedge-shaped member to be displaced upwardly from the body.
Abstract: A portable commode with spring assisted lifting seat has a lightweight self-supporting stand, a seat hinged to the frame and a pair of pneumatic springs for lifting the seat to an elevated position. The springs yield under the body weight of the user to depress the seat to a lowered position. The springs can be easily set at different positions on the seat to adjust for users of different body weights. A removable waste receptacle on the frame permits the commode to be used by itself, as at a bedside location, or over a conventional toilet bowl installation.
Abstract: A holder for medical specimen slides is made of a single sheet of corrugated cardboard cut and folded to make a tray portion and a cover portion hinged to each other for holding one or more slides therebetween. The holder features a tab integral with the cover which is pressed into a cutout in the tray portion to secure the holder in closed condition without need for external fasteners such as adhesive tape.
Abstract: A wheelchair for large individuals includes front casters mounted substantially forward of the user's center of gravity. Front caster and rear wheels are mounted on the same rigid member. The rigid member is pivotally attached to the rear of the frame while the front includes suspension means extending between the rigid member and the frame. A side plate provides universal adjustability for positioning the backrest, for pivoting the armrests and for seat height and tilt adjustment. A telescoping tube engages the ground when the wheelchair is leaned back to prevent tipping.
February 24, 1997
Date of Patent:
September 28, 1999
Phil Mundy, Duncan Newman, David Harding
Abstract: A method for operationally testing a wall mounted electronic carbon monoxide detector by temporarily hanging a test enclosure over the installed carbon monoxide detector so as to define a closed space between the test enclosure and the wall surface, and introducing a test gas into the enclosed space to determine the operational status of the detector. Hydrogen gas may be used as the test gas and generated by wetting a wafer of supercorroding alloy in the enclosure.
Abstract: An orthopedic splint has two end plates connected to an intermediate hinge which flexes in a plane transverse to the plates and attaches to a limb in a less obtrusive position behind the joint rather than on opposite sides of the joint. The hinge has continuously adjustable stops for limiting flexing and extension and a spring contained in the hinge for preloading the splint. The entire splint including the hinge may be enclosed and contained in a zippered moisture absorbent contour fitting cover for improved esthetic appearance and comfort.
Abstract: Gusseted plastic bags and methods of making the same in either rolls or stack packs, each bag having at least one plastic promotional strip extending along a side edge of the bag and secured adjacent to top and bottom edges. The promotional strip may be disposed either between the folded bag edges forming the gusset or outside of the gusset, and may or may not be perforated.