Abstract: A linear actuation mechanism includes a first threaded rod rotatably fixed on a frame, an actuator mechanically coupled to the first threaded rod and configured to cause a rotation thereof, a first nut threaded onto the first threaded rod and attached to a first eyecup configured to hold a first optical element for a headset display, and a rail on the frame configured to support the first eyecup as it moves with the first nut. A headset including a display and two eyepieces supported by at least the first eyecup and the above linear actuation mechanism, and a method for using the linear actuation mechanism to adjust an inter-axial distance between the eyepieces are also provided.

Abstract: A shoe having a sole includes a molded, rubber outsole and a molded midsole disposed within the outsole. The midsole may be contoured or shaped to approximate the shape of the sole of a wearer's foot. An upper disposed around a last may have a base portion that will take the shape of the midsole. The upper is permanently secured to the outsole by a foxing that is cured by application of a vulcanization process to fuse to both the outsole and the upper.