Abstract: An adjustable powder flow gate for a rotary pellet press has a movable gate wherein one dimensional motion of the gate across an opening in a powder flow feed frame on the rotating turret of the press is effected with a rotatable shaft having a screw connection to a member attached to the gate. The shaft is maintained in a selected rotational position with a bias member that is movable between an engaged and a disengaged position. The bias member is adapted to engage a selected detent on a member attached to the shaft having several circumferentially spaced detents when the bias member is in the engaged position. The shaft can freely rotate when the bias member is in the disengaged position. An operator can easily adjust the size of the opening by first disengaging the bias member from the selected detent, turning the shaft to move the gate to the desired position, and then engaging the bias member into a newly selected detent.

Abstract: An inspection system has a pellet diameter inspecting station and an apparatus for transferring pellets past the station. The apparatus includes a stationary support track for aligning and guiding pellets in a row along a linear path, and a transfer mechanism operable through forward and reverse strokes. The transfer mechanism has first and second grippers actuatable between pellet gripping and releasing positions and operable to grip respective rearmost pellets in a first row of pellets to be advanced past the inspecting station and in a second row of pellets previously advanced past the inspecting station. The transfer mechanism is operable to move from an initial position through the forward stroke to advance the pellets at a constant velocity along the linear path.

Abstract: A pellet escalator in a pellet loading apparatus for loading nuclear fuel pellets from a pellet press into a sintering boat includes a conveyor in the form of an elongated arm for moving pellets and being pivotable to vertically move its discharge end toward and away from a sintering boat. The arm has an elongated recessed channel through which travels the upper run of an endless flexible conveying belt for transporting pellets from a receiving end to the discharge end of the conveyor. A chute is mounted to the arm at its discharge end and extends therebelow such that the chute is carried by the arm at its discharge end for vertical movement therewith toward and away from the sintering boat. Resiliently-flexible, deflectable bristled brushes are attached to the chute in opposing vertical rows.

Abstract: A positive drive mechanism is provided to operate an internal tube cutter. The tube cutter has a body insertable into a tube to be severed, and a wedge-shaped slide supporting a cutting wheel on a forward portion of the cutter body. The slide and cutting wheel are movable toward and away from the tube. An elongated member is mounted through the cutter body for movement longitudinally thereof in one direction to cause outward radial movement of the slide and advancement of the cutting wheel toward and into contact with the tube to cause severing of the same upon rotation of the cutter body and in an opposite direction to permit inward radial movement of the slide and retraction of the cutting wheel away from and out of contact with the tube.

Abstract: This invention provides a loading mechanism for directing nuclear fuel pellets from one elevation to a lower container via gravity. The mechanism includes a loading chute into which the pellets are deposited and a vertically movable platform therebelow supporting a replaceable container to receive the pellets from the chute. The chute includes a plurality of generally oppositely downwardly angled resiliently covered plates defining a zig-zag path through the chute to limit the accumulation of momentum to the pellets, and the platform is spring-biased against the accumulated weight of the pellets and container so as to be continuously lowered as the weight thereof increases as the pellets are deposited in the container.