Abstract: A computer-implemented method of designing at least a portion of an electronic circuit schematic is described herein. The method comprises receiving requirements for an electronic circuit or at least a portion of an electronic circuit, creating a set of variables and constraints based on the requirements for the electronic circuit, wherein the constraints limit the possible value that may be assigned to the variables, assigning values to the variables using a solver such that the values of the variables satisfy the constraints, and outputting at least a portion of a designed electronic circuit schematic or circuit schematic specification that meets the requirements for the electronic circuit based on the assigned values of the variables.

Abstract: The mandrel assemblies include a double face box mandrel assembly with box refacing tube, male mandrel adapter for engaging within a bore of the box refacing tube, a box mandrel assembly floating over the male mandrel adapter and connected to a drill pipe connection. A box facing mandrel adapter connects to the male mandrel adapter, an outer face plate mounts over the box mandrel assembly engaging the box refacing tube; an inner face plate mounts over the box facing mandrel adapter shaft and attaches to a flange. A double face pin mandrel assembly with pin refacing tube, male mandrel adapter, and pin facing mandrel adapter engages a male mandrel adapter, a pin mandrel assembly floats over the male mandrel adapter and pin facing mandrel adapter and connects to a drill pipe connection opposite the double face box mandrel assembly.

Abstract: The current manufacturing practice in the recreational boating industry is to align and couple a singular inboard engine to a singular impeller drive. The disclosed invention is a power transmission device that allows for coupling of a singular engine to one or more impeller drives. The invention can provide a single engine watercraft with the advantages of a twin-engine watercraft, but at half the complexity and half the weight of a twin-engine installation. The present invention can also be employed for the installation of a larger high performance engine while powering standard low cost impeller drives, and without fear of loss in reliability, or even in a multiple fashion, within a multi-engine watercraft, allowing for various options such as closer placement of the impeller drives without the staggering of engines.