Abstract: A mechanism for gathering information from one or more detectors to aid in a determination of a current location of one or more entities is provided. Embodiments of the present invention perform these tasks by plotting data provided by the detectors onto a grid corresponding to a geographical area monitored by the detectors and then analyzing the plot for overlapping results using graphical techniques. Where measurements overlap, data associated with those measurements is provided to an analysis module to predict location and velocity of the entities. Aspects of the present invention provide an initial prediction of location and/or velocity of an entity in order to reduce convergence time of the analysis module.

Abstract: A tester for use with a device under test includes a processor, a signal timing editor to create representations of signal waveforms and associated times, and a test program executable on the processor that schedules events based on information from the signal timing editor. The test program schedules different delays for the events to compensate for variations in time delays between different signals coupled to the device under test.

Abstract: A touch sensor switch that responds to touching, or even to the proximity of an object, is disclosed. The switch includes a number of capacitance elements, or touch pads, that produce an effective capacitance dependent upon the physical proximity of the object. A microcontroller under control of a program stored in a read-only memory causes its I/O port to set a transient voltage on each capacitance element as a logic level. Each transient voltage is at variance with the capacitive element's preferred voltage level. The program then reads the I/O port, and hence the logic levels of the capacitance elements, as the capacitive elements revert to their preferred voltage levels, and calculates the proximity of the object, or touching, from relationships among recorded signals. The circuit may also be embodied in an application specific integrated circuit.

Abstract: A computer input device is used in conjunction with a mouse input device. The computer input device of the invention comprises a body having a resilient layer covered by a surface layer textured throughout the entirety of the surface for operation of the mouse. A printed circuit card is incorporated in the body between the resilient layer and the upper surface layer and includes a plurality of capacitive touch sensor pads. The card further includes electronic circuitry for operating the touch sensor pads to detect when a capacitive object, such as a fingertip, is in the proximity of a sensor pad. A touch need not apply force to register. The printed circuit card includes a guard ring pad surrounding the touch pads which detects the presence of the mouse over the sensor pads and indicates that any detected outputs from the sensor pads are not valid, but instead are due to the presence of the mouse.

Abstract: A recirculating document handler (2) is described which includes document circulating means (T1, T2, T3) for delivering documents in turn to a copying station (3) of a photocopier from a storage tray (21) and for returning the documents to the tray, whereby the documents may be circulated and recirculated in sequence past the copying station for repeated copying. The circulating means (T1, T2, T3) is adapted automatically to continuously circulate and recirculate through the storage tray (21) a single document longer (in the direction in which it moves) than the storage tray. A document copier incorporating such a document handler is also described as also is a method of copying documents utilizing these characteristics.