Abstract: A swing chute sampler for diverting the flow of material from a mainstream comprising an external housing having upper and lower openings, a side-arm chute, a fixed internal chute and an internal swing chute pivoted near the upper edge of the opening in the main housing which communicates with the side-arm chute is described. The fixed internal chute is substantially axially aligned with the main housing and has an upper and lower opening, said lower opening preferably being below the upper edge of the side opening in the main housing.

Abstract: An enclosed hammermill crusher having a closed-loop vent is described. The crusher-enclosure has an upper vent opening in the housing above the hammers where the hammer direction is upward, said vent opening communicating with a closed-loop vent duct. The lower part of the crusher housing is contiguous with a crushed particulate collector which has sloping sides and a small discharge opening cummunicating with a discharge conduit. The lower end of the vent duct connects to the discharge conduit near the collector discharge opening, preferably at about right angles to the discharge conduit. The inlet opening for aggregate material in the top of the housing is above the hammers where said hammers have a downward direction.