Abstract: An exercise machine with a more natural gait and computer gaming interface which, in some embodiments, further allows for a variable stride length while in use. In one configuration, each side of the exercise machine has a first crank assembly connected at an upper location on a pedal arm and a second crank connected at a middle location on the pedal arm, and a pedal is attached to a lower location of the pedal arm. The first crank assembly is connected to the pedal arm by a crank arm. The second crank assembly is connected to the pedal arm via a crank arm pivotally attached to a crank link. The path of each pedal is determined by the lengths of crank arms and crank links of the first and second crank assemblies rotating in synchronous motion.

Abstract: Described herein is a three stage bow string entrapment and release device. The device is unique and novel in that it incorporates trigger travel amplification such that a movement of X at the trigger results in a movement of approximately 1.5X at the critical release surface. Further, by mechanically disconnecting the trigger travel from the release surface, this device eliminates the perception of creep and allows the archer to focus on his or her target and not anticipate the breaking point of the release.

Abstract: Described herein is a three stage bow string entrapment and release device. The device is unique and novel in that it incorporates trigger travel amplification such that a movement of X at the trigger results in a movement of approximately 1.5× at the critical release surface. Further, by mechanically disconnecting the trigger travel from the release surface, this device eliminates the perception of creep and allows the archer to focus on his or her target and not anticipate the breaking point of the release.

Abstract: A uniformly flexible core, and method for manufacturing the same, for use between the face plates of a sandwich structure. The core is made of a plurality of thin corrugated strips, the corrugations being defined by a plurality of peaks and valleys connected to one another by a plurality of diagonal risers. The corrugated strips are orthogonally criss-crossed to form the core. The core is particualrly suitable for use with high accuracy spherically curved sandwich structures because undesirable stresses in the curved face plates are minimized due to the uniform flexibility characteristics of the core in both the X and Y directions. The core is self-venting because of the open geometry of the corrugations. The core can be made from any suitable composite, metal, or polymer. Thermal expansion problems in sandwich structures may be minimized by making the core from the same composite materials that are selected in the manufacture of the curved face plates because of their low coefficients of thermal expansion.