Abstract: A drive system with a central longitudinal axis includes a brushless DC servomotor with a stator and a rotor disposed radially interior of the stator. The rotor defines a coaxial central void space. A planetary gear assembly connected to an input shaft and an output shaft is coaxially disposed in the central void space. A flange fixed to the rotor transfers torque to the input shaft. The ratio of the overall length of the drive system to its outer diameter is about one or less, thereby creating a power density along the central longitudinal axis that is greater than known electric motor/gear box drive systems.

Abstract: A cartridge includes a cartridge case base having a bottom surface, a primer and an annular recess formed in the bottom surface, the annular recess being concentric with the primer; first and second concentric conductive rings disposed in the annular recess, the first and second rings being radially spaced apart and substantially flush with the bottom surface of the cartridge case base, the first and second rings being electrically insulated from the cartridge case base and the primer; a first data pin electrically connected to the first conductive ring and extending into an interior of the cartridge case base; and a second data pin electrically connected to the second conductive ring and extending into the interior of the cartridge case base, the first and second data pins being electrically insulated from the cartridge case base.