Abstract: A metal detection system for detecting metal within a body cavity of an individual. The metal detection system includes a first metal detector for detecting metal within an anal/vagina body cavity of an individual, and a second metal detector for detecting metal within an oral/facial body cavity of the individual. A chair supports a first detector sensor and a second detector sensor that connects to the first metal detector and the second metal detector, respectively. The system further includes a processor that interconnects with the first and second detectors. The processor connects to a control panel having indicators responsive to a first output signal and second output signal generated upon detection of metal by the first metal detector and the second metal detector, respectively.

Abstract: A walk-through metal detection system with split field generation coils excited in phase to generate an electromagnetic field having a substantially uniform vertical field density. A plurality of vertically distributed receiver coils are also provided, each receiver coil connected to a separate detector circuit for detecting disturbances in the generated field caused by the presence of metal objects. The signals are processed to generate an output signal indicative of the individual metal mass (or masses) of objects detected within the generated electromagnetic field. The output signal is compared to a threshold signal, and if greater than the threshold signal, then a metal object is presumed to be present within the electromagnetic field and an alarm is sounded. A remote control may be used by an operator to adjust the threshold signals. Additional processing of the detector circuit outputs differentiates between a single object of large metal mass and multiple objects of combined metal mass.

Abstract: An apparatus for froth flotation separation of the components of a slurry, said apparatus comprising at least one flotation cell, at least one spray nozzle for feeding slurry to said flotation cell, and a rotatably mounted skimmer means for skimming froth from said flotation cell, wherein said spray nozzle is affixed to and situated behind the rotational direction of said skimmer means and wherein said spray nozzle and skimmer are adapted to simultaneously rotate thereby causing the skimmer to skim the froth in the direction opposite to the spraying direction of the spray nozzle.

Abstract: An improved spray apparatus for the froth flotation of a liquid-solid slurry, e.g., water-containing coal particulate, is disclosed. The initially high velocity of a spray of the slurry prior to its contacting the surface of liquid in a froth flotation cell is significantly reduced through a double deflection arrangement associated with the spray nozzle. This reduction in the velocity of the spray results in a more efficient froth flotation process.