Abstract: Apparatus for energizing a selected one or more of a plurality of actuation devices in order to cause a printing element associated with each selected actuation device to strike an adjacent recording medium.

Abstract: Method and apparatus for accurately positioning a blank angular position transducer element for boring at its center. A relatively high frequency carrier signal is applied to the blank transducer element to be bored and is thereby induced in a master rotor element which is rotated at a constant speed in an operative relationship with the blank. The rotor is made deliberately eccentric with respect to its axis of rotation, and the induced signal contains a carrier signal, a component indicative of relative angular position, and a once-per-revolution eccentricity error component, if the blank element is also eccentric with respect to the axis of rotation. Error detection circuitry isolates the once-per-revolution eccentricity error component, and resolution circuitry resolves it into x and y directions for application to error display devices, or to actuators connected to move the blank transducer element automatically until the x and y components are both zero.

Abstract: A linear actuator for selectively moving a carriage relative to a support frame along a predefined linear path.

Abstract: A linear actuator for selectively moving a carriage relative to a support frame along a predefined linear path.

Abstract: A linear actuator for selectively moving an assembly relative to a support frame along a predefined linear path. The linear actuator includes a drive shaft having a cylindrical surface, means for rotatable mounting the drive shaft to the frame for rotation of the drive shaft about the axis of the cylindrical surface, and means coupled to the drive shaft for rotating same about such axis. A carriage forms part of the assembly with the remainder of the assembly being mounted to the carriage and including a roller. Means are included for mounting the roller to the carriage with the roller being rotatable about a first axis and pivotable about a second axis perpendicular to the first axis.

Abstract: Apparatus for supporting a carriage about an elongate shaft for linear movement of the carriage along the shaft. The apparatus comprises an elongate tubular housing to which a carriage may be mounted, the housing having opposing normally open ends, a pair of linear bearings mounted in the housing in spaced apart relation adjacent respective opposing ends thereof, the bearings having aligned openings for receiving an elongate shaft in contacting relatively movable relation, and means included in the housing for lubricating the bearings during movement of the housing along an elongate shaft disposed therethrough.