Abstract: A flexible coupling for disposition between two rotating shafts to reduce transmission of vibration or to increase the torque and speed range of the coupling for a given level of vibration transmission comprises input and output members connectible to driving and driven shafts and interconnected by a spacer via coupling elements which are flexible in the plane of rotation by centrifugal force and by torque transmitted through the coupling, such that, over a range of speeds and torques the spacer is relatively rotatable to at least one member.A secondary coupling is also disclosed to render radially rigid a primary coupling comprising input and output members and coupling elements. The secondary coupling may comprise a bearing or a plain bearing, a multiple bearing or a cross links flexural pivot.

Abstract: A tire measuring instrument is disclosed for measuring the diameter and bead-to-bead dimension of a tire casing and correlating such measurement to a particular retreading matrix. A frame carries a plurality of rotatable cylinders, the periphery of each cylinder containing designations of selected retreading matrices. A carriage is mounted on the frame for translational movement relative to the cylinders. The carriage carries a plurality of indicators, each indicator being associated with a particular nominal tire size. A pair of legs are pivotally mounted on the frame and include pulley-carrying outer foot portions extending into a tire measuring zone. A plunger is attached to the carriage and is mounted for translational movement. The lower end of the plunger extends between the legs and into the tire measuring zone for engaging the crown of a tire being measured.