Abstract: In a battery housing and charging system for a range of cordless tools, a universal charger accepts battery packs of several configurations and size (number of cells). The common feature of the battery packs is (at least) one cell housed on end and substantially coaxial with a specific terminal block assembly. Terminal pins are shielded from external contact and engage the charger terminals in a recessed well in the floor of the charger receptacle. Charger terminals are at one end of the receptacle which is elongated so that it can accommodate a battery pack "nose" portion with either one or two cells housed on end and side-by-side. Upright side walls of the receptacle provide stabilizing support for the battery pack In the battery pack portion outside the receptacle, cells may be arranged in any configuration to suit tool or other requirements. Charger output terminals are normally biased away from their respective terminal apertures to minimize risk of accidental contact with live terminals.

Abstract: In a battery housing and charging system for a range of cordless tools, a universal charger accepts battery packs of several configurations and size (number of cells). The common feature of the battery packs is (at least) one cell housed on end and substantially coaxial with a specific terminal block assembly. Terminal pins are shielded from external contact and engage the charger terminals in a recessed well in the floor of the charger receptacle. Charger terminals are at one end of the receptacle which is elongated so that it can accommodate a battery pack "nose" portion with either one or two cells housed on end and side-by-side. Upright side walls of the receptacle provide stabilizing support for the battery pack. In the battery pack portion outside the receptacle, cells may be arranged in any configuration to suit tool or other requirements. Charger output terminals are normally biased away from their respective terminal apertures to minimize risk of accidental contact with live terminals.

Abstract: A connection arrangement for coupling a brush bearing sub-assembly to the stator field windings in an electric motor. The sub-assembly has a plate with a plurality of terminal blades extending perpendicularly, the blades being arranged in staggered pairs of one long blade and one short blade. The stator has corresponding pairs of connectors, staggered in accordance with the staggered terminal blades of the sub-assembly, with each connector including a resilient, omega-shaped conductive element. The corresponding staggered arrangement of the terminal blades and stator connectors provides for accurate coupling of the two, since the shape of the resilient connectors permits insertion from either a lateral or axial direction.

Abstract: A brush bearing sub-assembly for an electric motor includes a generally U-shaped plate having an aperture into which the motor commutator is fitted. The plate includes integral walls on one side for retaining rectangular brushes in correspondingly-shaped brush holders, and springs for biasing each brush towards the central aperture. A circuit pattern imbedded in the plate provides a path for carrying power from power input terminals through the springs to the brushes and motor field windings.