Abstract: Systems, methods, and apparatus for maintaining stable conditions within a power grid are provided. A local device that includes one or more computer processors may identify one or more power sources associated with a structure. The local device may additionally monitor one or more parameters associated with a power grid configured to supply power to the structure. Based at least in part on the monitoring, the local device may identify a power grid fluctuation. Based at least in part on the identification of the power grid fluctuation, the local device may adjust operation of at least one power source included in the one or more identified power sources.

Abstract: A support unit for supporting readable material at a convenient angle and height for facilitated viewing. The support unit is deployable between a collapsed and generally flat non-deployed position, and a deployed position with a support platen at an adjustably selected angle and height for comfortable viewing. In one embodiment, the support platen is pivotally mounted onto an intermediate bracket plate which in turn is pivotally mounted onto a base plate, with an upper support strut adjustably set to accommodate support platen positioning relative to the base plate and bracket plate in one of multiple angular settings. The support platen may include or support a digital device such as an electronic touch pad, computer or reading device. In a preferred form, the upper support strut is adapted to overlie and protect the support platen and device thereon in the non-deployed position.

Abstract: Systems, methods, and apparatus for maintaining stable conditions within a power grid are provided. A local device that includes one or more computer processors may identify one or more power sources associated with a structure. The local device may additionally monitor one or more parameters associated with a power grid configured to supply power to the structure. Based at least in part on the monitoring, the local device may identify a power grid fluctuation. Based at least in part on the identification of the power grid fluctuation, the local device may adjust operation of at least one power source included in the one or more identified power sources.

Abstract: A support unit for supporting readable material at a convenient angle and height for facilitated viewing. The support unit is deployable between a collapsed and generally flat non-deployed position, and a deployed position with a support platen at an adjustably selected angle and height for comfortable viewing. In one embodiment, the support platen is pivotally mounted onto an intermediate bracket plate which in turn is pivotally mounted onto a base plate, with an upper support strut adjustably set to accommodate support platen positioning relative to the base plate and bracket plate in one of multiple angular settings. The support platen may additionally support the reading material such as an electronic digital device including electronic touch pad or keypad, at a selected rotational position. In one preferred form, the upper support strut is adapted to overlie and protect the support platen and device thereon in the non-deployed position.

Abstract: A discharge lamp circuit includes a power source for creating a current flow. A ballast is electrically connected to the power source and controls the current flow produced by the power source. A capacitor is electrically connected in the ballast. At least one discharge lamp is connected in series with the capacitor. The current flow passes through the discharge lamp during normal operation of the discharge lamp circuit. The ballast includes a switching circuit, electrically connected to the capacitor and the discharge lamp. The switching circuit provides an alternate path for the current flow during a starting operation of the discharge lamp circuit. The switching circuit provides the alternate path in accordance with a charge associated with the capacitor. The charge associated with the capacitor increases when the current flow passes through the alternate path.

Abstract: A discharge lamp circuit includes a power source for creating a current flow. A ballast is electrically connected to the current source and controls the current flow produced by the current source. A capacitor is electrically connected in the ballast. At least one discharge lamp is connected in series with the capacitor. The current flow passes through the discharge lamp during normal operation of the discharge lamp circuit. The ballast includes a switching circuit, electrically connected to the capacitor and the discharge lamp. The switching circuit provides an alternate path for the current flow during a starting operation of the discharge lamp circuit. The switching circuit provides the alternate path in accordance with a charge associated with the capacitor. The charge associated with the capacitor increases when the current flow passes through the alternate path.

Abstract: A reamer screw having an elongated shank, with a leading end and a trailing end, at opposite ends, and having a self-tapping/cutting threaded portion at the leading end adapted for self-tapping and cutting an opening through a workpiece, and driving securely into a substrate, a torque formation at the trailing end for engagement by a suitable driving tool for the single function insertion of the threaded portion through the workpiece and into the substrate, in a single operation, a smooth shank portion extending between the threaded portion and the trailing end and having a length sufficient to extend through the workpiece, driving in of the threaded portion through the workpiece, releasing the workpiece allowing the threaded portion to be tightened up in the substrate, while the smooth shank portion rotates freely in the workpiece permitting the workpiece to be drawn snugly against the substrate without binding in the workpiece, and reamer formations formed by outwardly extending wing portions of the smooth

Abstract: An ophthalmoscope having two lens discs one of which has three different lenses and the other of which has twenty-three different lenses. There is a viewing path through the instrument and, in use, one lens in each disc will always be in registry with the viewing passage. The two lens discs in combination provide sixty-nine different diopters ranging from -30 to +38 diopters. The lens discs have a common axis of rotation and are spaced apart so as to permit a cam plate to be positioned between the discs in close proximity to each. The cam plate is operable to provide an automatic lens shifting mechanism for the pair of lens discs.

Abstract: An optical system for illuminated viewing instruments comprising a light source lamp having an arcuate filament and a coacting mirror having an arcuate viewing passage in its upper edge. The optics of the system operate to focus the image of the filament on the mirror in concentric relation to the arcuate viewing passage whereby the axis of the reflected filament light and the viewer's line of sight are nearly coincident. In order to have all of the curved filament in focus on the mirror, the filament is tilted or disposed at an oblique angle to the longitudinal axis of the lamp. The optical system of the invention also permits use of a fixation pattern and provides the means for precisely focusing the pattern on the fundus of the patient's eye.