Abstract: A solo ski system which contains a ski, a first ski binding mounted on the ski, and a second ski binding mounted on the ski in back of the first ski binding. The second ski binding is suitable for removably attaching a boot to a ski. It contains a base plate, a first mounting stud attached to the base plate, a second mounting stud attached to the base plate, a binding base removably and pivotally attached to the first mounting stud. The ski binding is adjustably and releasably attached to the boot.

Abstract: A ski binding for removably attaching a boot to a ski. The ski binding contains a base plate, a first mounting stud attached to the base plate, a second mounting stud attached to the base plate, a binding base removably and pivotally attached to the first mounting stud. The ski binding is adjustably and releasably attached to the boot.

Abstract: A rotary power drive is provided for delivering a substantially constant horsepower over a wide speed range in one direction of rotation comprising two or more constant displacement hydraulic motive means operatively associated with a shaft to be driven thereby, an overrunning clutch operatively interposed between at least one of such motive means and said shaft, and means for supplying hydraulic drive fluid to such motive means in different combinations over different shaft speed ranges to provide a multiple displacement hydraulic motor drive apparatus.

Abstract: An electro-mechanical actuator has a ferrous alloy armature movably mounted within a body chamber. Two axially-spaced permanent magnets are arranged radially inwardly of the chamber and partially define the chamber at the ends thereof. A coil surrounds the chamber. The body is formed of a magnetically-permeable material. Because of the high reluctance of the magnets, each magnet forms a short magnetic loop which passes through the adjacent air gap, and forms a long magnetic loop which encircles the coil and passes through the distant air gap. The armature has a bistable toggle-like movement, and may be latched proximate either end wall. If springs are added between the armature and the body, the improved actuator may be used as a proportional position of force transducer within an operating range of armature movement.