Abstract: A crankshaft assembly for precision low load applications has cylindrical crankpins mounted on concave peripheral grooves on the ends of a crankshaft and coupled thereto by clamps which lockingly engage aligned annular grooves in the crankshaft and crankpin.

Abstract: Keyboard generated signals are digitally encoded and converted to varying voltages for application to a coil for generating magnetic forces. The magnetic forces act on a spring mass system including a type disc to rotate the type disc to a selected angular position. The rest position of the disc at any selected angular position is established when the applied magnetic force and the force of an oppositely acting spring reach equilibrium condition. The spring stores or releases energy according to whether the applied magnetic force is greater or less than the existing spring force. The parameters of the system are so chosen that movement from one angular position of rest to another is smoothly accomplished in a given time.

Abstract: To change a type disc without moving or removing a ribbon cartridge while yet permitting the location of a ribbon cartridge closer to the printing point of a type disc printer, there is provided mechanism to allow pivoting movement of a hammer assembly relative to an independently pivoted type disc drive assembly thereby to change their relative orientation, after which continued movement of the hammer assembly carries the pivotally mounted type disc drive assembly to a type disc change position. The change in orientation of the hammer assembly relative to the type disc drive assembly, before pivoting the type disc assembly, allows greater arcuate movement to type disc change position without interference between the hammer assembly and the ribbon cartridge.

Abstract: A daisy wheel typewriter wherein wheel positioning to present a character for printing and hammer actuation to effect printing of a selected character are electronically operated in response to keyboard generated signals. Functions associated with a printing action, e.g., ribbon lift, ribbon feed, and carriage spacing, are, however, operated mechanically in synchronism with the electronics by a timing disc driven by a print cycle function actuating shaft. Non-printing service functions are also operated mechanically by conventional powered mechanisms responsive to keyboard generated signals.

Abstract: An ignition lock unit with a disassembly which can be cancelled only by means of an associated key rotated into a predetermined position and with a coupling connected to cable ends which is adapted to be mounted over the coordinated contact pins of the ignition starter switch part of the ignition lock unit. The coupling includes a contact carrier plate with a centrally arranged aperture for a locking rod extending out of the ignition starter switch, whereby the latter during the assembly and disassembly of the coupling, passes through this aperture when a corresponding position is reached by means of the key. In every other position of the key or with a removed key, the free end of the locking rod engages the aperture hook-shaped from behind.

Abstract: An intermittent drive for a single-element printing typewriter, calculator or similar machine. The drive comprises a drive shaft couplable via a cycle clutch to a driven shaft and a governor disposed on the driven shaft to couple it with and maintain it at the same speed as the drive shaft during the clutch cycle. The governor comprises a friction wheel having a generally circular cross-section provided with flattened portions. During the clutch cycle, when the clutch engages the driven shaft, the friction wheel contacts a roll fixed to the drive shaft preventing the driven shaft from leading the drive shaft in response to reflected forces. At the end of the clutch cycle, when the clutch is disengaged, the friction wheel has rotated so that a flattened portion of the friction wheel faces the roll, and driven shaft is free from the rotation of the drive shaft.