Abstract: Apparatus for attaching a multiconductor cable to a housing, such as the backshell of a connector, is disclosed that has a seal member located in the opening in the tubular section of the housing through which the cable extends into the housing to seal the space between the cable and the walls of the opening. A clamp is attached to the cable adjacent to the end of the tubular section. Washers are located on each side of the clamp and held in engagement with the clamp and the housing by a gland nut so that any forces imposed on the cable outside the housing will be transmitted to the housing by the clamp, the washers, and the gland nut and not be imposed on the section of cable in engagement with the seal member.

Abstract: A spring for a geophone has a plurality of spring arms connecting inner and outer concentric annular portions to resiliently resist relative movement of the annular portions along the concentric axis. Two support arms are connected to each spring arm. Each support arm has one end connected to one of the annular portions and the other end connected to the spring arm at a point spaced from the point of connection of the other spring arm to increase the natural frequency of the spring in a direction lateral to the concentric axis without changing appreciably the natural frequency of the spring along the concentric axis.