Abstract: In a solid-liquid separation apparatus, which comprises multiple movable members and screws that extend and pass through the movable members without contacting the movable members and which dehydrates sludge while conveying same by means of the rotation of the screws, to apply a wringing action on the sludge and increase sludge dehydration efficiency. (Solution) A first movable unit 41 is configured by linking multiple movable members 4A and 4B as a unit with a linking rod 44, a second movable unit 41A is configured by linking multiple other movable members 4C and 4D as a unit with a linking rod 44A, and the movable members 4A and 4B of the first movable unit 41 and the movable members 4C and 4D of the second movable unit 41A are reciprocated with a phase difference.

Abstract: A mode converter for a distance measuring device having a sonic delay line with a permanent magnet movable along same, the converter having a free-standing magnetostrictive armature with one end attached to the delay line and the other end terminating dampinglessly within the usual coil. The armature length and shape are such that the longitudinal stress wave initiated by an electrical pulse in the coil strengthens the mechanical pulse applied to the delay line.