Abstract: A coal pulverizer including a mill housing, a grinding surface disposed in said mill housing, a grinding wheel engaging said grinding surface for pulverizing coal chunks; an annular throat disposed around said grinding surface channeling a primary airflow from a lower housing portion below said grinding surface upward through an upper housing portion above said grinding surface; an annular secondary airflow chamber extending around an exterior of said upper housing portion channeling a secondary airflow circumferentially into said upper housing portion above said grinding surface; and, an annular secondary airflow deflector extending along an interior of said upper housing portion above said grinding surface directing said secondary airflow from said secondary airflow chamber downward across said grinding surface in a generally uniform uninterrupted circumferential airflow pattern.

Abstract: A coal pulverizer comprising a mill housing, a grinding surface disposed in said mill housing, a grinding wheel engaging said grinding surface for pulverizing coal chunks; an annular throat disposed around said grinding surface channeling a primary airflow from a lower housing portion below said grinding surface upward through an upper housing portion above said grinding surface; an annular secondary airflow chamber extending around an exterior of said upper housing portion channeling a secondary airflow circumferentially into said upper housing portion above said grinding surface; and, an annular secondary airflow deflector extending along an interior of said upper housing portion above said grinding surface directing said secondary airflow from said secondary airflow chamber downward across said grinding surface in a generally uniform uninterrupted circumferential airflow pattern.

Abstract: A system for collecting emission samples can include at least one probe having a plurality of elongate tubes, with each tube having an opening formed therein for positioning in an emission producing facility, such as in an outlet duct of a power generating facility. Each of the tubes can be of varying length with the tube openings at a terminal end of each tube, such that the tube openings reside at varying spaced-apart points when positioned in the outlet duct. Suction means, such as an aspirator, can be operatively connected to the plurality of tubes to suction gas in the facility through the openings and into the tubes, so that emissions carried in the suctioned gas are drawn into the plurality of tubes. A collection container can be operatively connected to the plurality of tubes and the suction means, such that the emissions are suctioned into the tubes and deposited into the collection container.

Abstract: A scanner powered by the limited power available on a peripheral bus. In particular, the scanner can operate within the 2.2 watts provided over a USB connector. The scanner of the present invention uses a contact image sensor (CIS) which uses optics to distribute light from each light emitter to multiple pixel positions, preferably using a single LED for each color. An electric motor for driving the platen uses rare earth magnets to limit the power required. Instead of the traditional method of biasing the CIS scanner against the platen with a spring, the platen itself is spring-biased. The moveable spring biasing of a platen is possible because a worm drive motor is used allowing a helical thread on the worm drive to contact the platen gears as they move up and down as biased. Preferably, the helical thread of the worm gear has a single point of contact with a gear on the platen, further limiting the friction and allowing the platen to move up and down with respect to the stationary motor.

Abstract: A peripheral powered document scanning device includes a frame, contact image sensor ("CIS") module, a drive platen, document drive platen bearings, springs, a non-enveloping worm drive assembly, a printed circuit board, and a document sensor. The frame comprises rigid members that include an upper frame member, a lower frame member, and right and left endplate members. The four-piece frame is configured so that the upper frame member and the lower frame member are opposite to each other and each is connected at their right and left ends to the right endplate member and the left endplate member, respectively. Each endplate member includes a longitudinal slot where the drive platen rests on the springs so that the drive platen moves in a longitudinal direction with respect to the frame. The CIS module is secured to the upper frame member and remains fixed with respect to the frame.

Abstract: The present invention relates to a scanner housing structure which includes a scanner shell for mounting therein a scanning circuit, and the scanner housing structure is drawably mounted in a scanner-receiving space of a computer and allowed to be partially or completely drawn out of the scanner-receiving space. The scanner housing structure according to the present invention provides a more convenient environment in using a scanner, and the scanner can be a part of the computer so that no more effort of a user to choose and install a scanner is needed.

Abstract: The present invention is related to a sheet feeder used with an image scanner for transmitting a sheet object to be scanned through the image scanner which has a sloping plane detachably mounting thereon the image scanner and allowing the sheet object to be transmitted between the image scanner and the sheet feeder along the sloping plane for assisting in monitoring a transmission situation of the sheet object. The present invention utilizes an improvement on a sheet feeder structure to make the sheet feeder more pragmatic.

Abstract: A method of processing an input image for storage includes decomposing the input image into a number of images at various resolutions, subdividing at least some of these images into tiles (rectangular arrays) and storing a block (referred to as the "tile block") representing each of the tiles, along with an index that specifies the respective locations of the tile blocks. In specific embodiments, the tiles are 64.times.64 pixels or 128.times.128 pixels. The representations of the tiles are typically compressed versions of the tiles. In a specific embodiment, JPEG compression is used. In a specific embodiment, an operand image is recursively decomposed to produce a reduced image and a set of additional (or complementary) pixel data. At the first stage, the operand image is normally the input image, and, for each subsequent stage, the operand image is the reduced image from the previous stage.