Abstract: In a magnetic torsion meter for measuring the torque exerted on a rotating assembly, the rotating assembly includes first and second sections of a rotating shaft brought together by a torsion shaft. The torsion meter includes an exterior U-shaped fixed magnetic circuit. A continuous source of magnetic excitation creates a flux through the circuit and gaps of the first and second rotors. The first and second rotors each include an annular disk made of a non-magnetic material. The disks each include two concentric coils of ferromagnetic pins. The pins of the first rotor face the pins of the second rotor while defining two measuring gaps. The relative angular position of pins on both sides of the measuring gap is such that the reluctances are equal when no torque is applied but vary inversely when a nonzero torque is applied. The torsion meter includes at least two magnetic induction sensors housed in one of the smooth gaps of the U-shaped magnetic circuit.

Abstract: There is disclosed a method for rendering fine denier polypropylene filaments and fibers flame retardant. The method includes mixing flame retardant compounds, such as an aromatic bromine and antimony oxide, with an anti-oxidant and low density polyethylene prior to mixing with the polypropylene resin.

Abstract: An apparatus for producing randomly or space dyed skeins of yarn and which comprises an open vat adapted to be filled with a liquid dye bath, a rack for supporting a plurality of skeins, and means for selectively lifting the rack such that the rack and skeins may be translated between a fully lowered position in the dye bath and a plurality of raised positions.