Abstract: A plurality of circular cross section elongated vibrometer reeds each having a predetermined frequency response to a vibration in a given plane are secured to a vibration transmission medium in predetermined orientations. The medium is secured in vibrating communication with a machine frame, for example, a helicopter frame, to transmit frame vibrations to the reeds. Each reed is oriented to respond to at least one vibration associated with a known source of vibration in an environment of complex vibrations produced by a plurality of sources in the machine.

Abstract: A connector for use with a plastic corrugated tubing is provided in which a first annular member is provided with an end face which is adjacent a projecting end of the tube when the annular member is disposed about the tube. The end face is disposed within a trough of one of the tube corrugations. An outer sleeve is threaded to the annular member and includes an inwardly depending flange having a face which is coextensive with the end face of the annular member. The two faces serve to clamp the projecting end of the conduit therebetween thereby clamping the connector to the conduit.