Abstract: A method of processing a signal representing a physiological rhythm of a subject, the method comprising the steps of receiving the signal from the subject, filtering the signal with a band pass filter, extracting an analysis window from the filtered signal, performing a plurality of interval length estimation methods on the filtered signal in the analysis window, summing the outputs of the plurality of interval length estimation methods, and determining an interval length from the sum of the outputs of the plurality of interval length estimation methods.

Abstract: A method of processing a signal representing a physiological rhythm of a subject, the method comprising the steps of receiving the signal from the subject, filtering the signal with a band pass filter, extracting an analysis window from the filtered signal, performing a plurality of interval length estimation methods on the filtered signal in the analysis window, summing the outputs of the plurality of interval length estimation methods, and determining an interval length from the sum of the outputs of the plurality of interval length estimation methods.

Abstract: An eccentric pivot arm tensioner capable of automatic belt tensioning and substantially simultaneous operating range indexing during installation. The tensioner comprises a stop plate and cooperating lock plate. The tensioner comprises a pivot arm having a pivot arm member that cooperatively engages a base plate member. In a first, or transit mode, the pivot arm member temporarily engages the base plate member to put a torsion spring and thereby the pivot arm in a preloaded condition. The lock plate is engaged with the stop plate. As a mounting fastener is engaged into a mounting surface the pivot arm member is automatically disengaged from the base plate member by an axial movement of the pivot arm, thereby allowing the pivot arm to rotate and thereby impart a torsion spring force to a belt, i.e., tensioning the belt in an operating position.

Abstract: An apparatus adapted to be mounted on a surface grinding machine is provided for testing abrasive grains in single-grit scratch tests. To permit specimen preparation and scratching to be carried out on a single machine without changeover and without reclamping the specimen, and to maintain the infeed in the scratching operation constant by giving the specimen a contour corresponding to the cross-feed error, a belt grinder and a scratching device comprising a support disk, mounted by means of a main flange and a counterflange, and a scratching disk mounted on the main flange and carrying a single grain secured to its periphery along with a force-measuring system disposed thereunder, are designed as a structural unit adapted to be mounted on the spindle of the surface grinding machine, with a belt tensioning arm mounted to the headstock.