Abstract: The present invention provides a compact scanner apparatus having a tunnel with a conveyor passing therethrough. A scanning beam, e.g. an X-ray beam, is mounted in the tunnel to view an object being moved on the conveyor. Upper and lower isolation device curtains are mounted at the tunnel entry. Either a single curtain or multiple curtains are mounted at the exit of the tunnel. The lower curtains are opposed pairs hinged to pivot as the object passes through. The upper curtains may be hinged pairs or a single swinging curtain hanging down from a support bar. Alternate embodiments provide bi-directional hinged curtains or multiple tiers of hinged curtains.

Abstract: X-ray radiation is transmitted through and scattered from an object under inspection to detect weapons, narcotics, explosives or other contraband. Relatively fast scintillators are employed for faster X-ray detection efficiency and significantly improved image resolution. Scatter and transmission images of the object are displayed, at least one being colorized in accordance with the effective atomic number of constituents of the object. Soft switching between photon-counting and photon integration modes reduces noise and significantly increases overall image quality.

Abstract: X-ray radiation is transmitted through and scattered from an object under inspection to detect weapons, narcotics, explosives or other contraband. Relatively fast scintillators are employed for faster X-ray detection efficiency and significantly improved image resolution. Scatter and transmission images of the object are displayed, at least one being colorized in accordance with the effective atomic number of constituents of the object. Soft switching between photon-counting and photon integration modes reduces noise and significantly increases overall image quality.

Abstract: A sensing and indicating device is mounted at a fixed location and uses transmitted and reflected acoustic or electrical energy to determine the distance between the sensor and an approaching vehicle. The sensor provides visual and/or audible indication of the distance between the vehicle and the sensor. The driver of the vehicle uses that displayed or audible information to locate the vehicle within a defined space or envelope, e.g., within a garage. The sensor and indicator may also be located laterally with respect to the vehicle so that the distance between the vehicle side and the sensor can be determined whereby the vehicle can be located laterally within the defined space or envelope. The device remains active at all times, precluding any need for manual intervention to activate it, without compromising power consumption.

Abstract: A sensing and indicating device is mounted at a fixed location to determine the distance between the sensor and an approaching vehicle. The sensor provides visual and/or audible indication of the distance between the vehicle and the sensor. The driver of the vehicle uses that displayed or audible information to locate the vehicle within a defined space or envelope, e.g., within a garage. The sensor and indicator may also be located laterally with respect to the vehicle so that the distance between the vehicle side and the sensor can be determined whereby the vehicle can be located laterally within the defined space or envelope.

Abstract: The present invention in one embodiment provides a metal detector comprising a coil, a circuit board on which the coil is etched, a digital signal processor, and a warning circuit, and battery power source. When a sufficient amount of metal is near the coil, the digital signal processor activates a device or devices in the warning circuit. In another embodiment the circuit board on which the coil is placed is used in conjunction with a one piece molded housing. In another embodiment the present invention, provides a metal detector comprising an elongated coil etched onto an elongated circuit board. At least one active device, which is part of detection circuitry is also preferably placed on the elongated circuit board. The detection circuitry in one embodiment, includes circuitry which together with the elongated coil forms an oscillator circuit. The elongated covering case in one embodiment is molded substantially seamlessly by blowmold, extrusion, or injection mold.

Abstract: A metal detector system includes two transmitter-receiver antenna pairs supported by respective side panels of a portal. The relative positions of an adjacent transmitter antenna and receiver antenna within an antenna pair may be adjusted to calibrate the antennas, such as by crossing adjacent antennas or by increasing the distance between adjacent antennas.