Abstract: An apparatus, system, and method for providing DC battery backup power to Power over Ethernet, (PoE) Mid Span or End Point Power Sourcing Equipment, (PSE), such that in the event of the loss of utility power the PSE device is able to continue to provide power for some time while battery capacity remains. The apparatus includes an AC to DC converter that receives an AC power input and outputs DC power to the power over Ethernet circuitry and a DC battery pack that provides backup DC power to the power over Ethernet circuitry.

Abstract: An apparatus, system, and method for providing DC battery backup power to Power over Ethernet, (PoE) Mid Span or End Point Power Sourcing Equipment, (PSE), such that in the event of the loss of utility power the PSE device is able to continue to provide power for some time while battery capacity remains. The apparatus includes an AC to DC converter that receives an AC power input and outputs DC power to the power over Ethernet circuitry and a DC battery pack that provides backup DC power to the power over Ethernet circuitry.

Abstract: An illumination apparatus for a digitizer tablet includes a support structure and a solid sheet optical light guide supported by the support structure and having first and second opposing surfaces and a plurality of edges. Light sources are carried by the support structure and positioned to direct light into light-receiving edges of the light guide. Reflecting structure is disposed adjacent the first surface of the light guide. A predetermined pattern is disposed on the first surface of the light guide structured and arranged in accordance with distance from the light sources.

Abstract: Apparatus for soldering and desoldering an electronic component to or from a printed circuit board includes an alignment station and a soldering/desoldering station. The printed circuit board is mounted upon an adjusable X-Y table which can be indexed between the alignment station and the soldering/desoldering station. To align an electronic component with respect to th PCB, a vacuum pickup device is operated at the alignment station to pickup and support the component within an optical field of view above the PCB and the X-Y table is adjusted in X, Y and .theta. directions with respect to the component. Upon alignment of the component, the pickup device is lowered to temporarily adhere the component to the PCB by an adhesive flux. Thereafter, the X-Y table is indexed to a preset position below a hot air soldering nozzle and the component soldered in a known manner. A rotary device for shearing a defective electronic device from a PCB is also attached to the bottom of the soldering/desoldering nozzle.

Abstract: A probe for use with circuitry for monitoring signals emanating from a heated electrical appliance, the probe including a planar member having three layers, the first layer including at least a first electrically conductive portion adapted to support a piece of solder, the second layer being an electrically insulating layer disposed between the first layer and a third layer, the third layer being electrically conductive. A novel method and circuit using the above probe are also disclosed wherein a heated soldering iron or solder extractor tip or the like melts the piece of solder to establish good electrical connection for the signals from the tip to the monitor circuit through the molten solder and the first portion of the first layer.

Abstract: This invention relates to a method and apparatus for removing and installing surface mounted devices (SMD's) with respect to a substrate such as a printed circuit board (PCB).

Abstract: An electronic weight indicator adapted to convert an analog output of a load cell into a digital display which, after initial calibration, automatically corrects for dead load, drift and other calibration errors introduced by the circuitry. The meter can also be programmed to count for creep. The weight indicator employs a microprocessor to control an analog-to-digital converter which converts the analog signal from the load cell to a digital display. The microprocessor employs a unique algorithm permanently retained in an associated memory to correct for drift and compensate for deadload changes and creep. Once calibrated, no further adjustments by the user are required. All adjustments are made automatically, without operator intervention. The weight indicator can be used with any load cell producing an analog signal in response to a force, e.g. a weight on a weighing platform connected to the load cell.