Abstract: A handheld power tool includes a housing, a tool receptacle disposed on a first end of the housing and configured to receive a tool accessory, a motor positioned within the housing and operatively coupled to the tool receptacle to drive the tool accessory, and a dust collection assembly integrated within the housing. The dust collection assembly includes a fan disposed within the housing and operatively coupled to the motor. The fan is configured to generate a suction airflow due to rotation of the motor, and a dust container removably coupled to the housing of the power tool. The dust container is configured to collect dust and other debris generated by the tool accessory during operation of the handheld power tool.

Abstract: A voltage reference circuit which includes a first diode having a first predetermined forward voltage drop as a function of current, a second diode having a second predetermined forward voltage drop as a function of current, lower by a preselected amount than said first diode voltage drop and connected to a voltage reference node and to one end of said first diode. A resistor is connected to the voltage reference node and to another end of the first diode such that the second diode and the resistor form a current path around the first diode. The arrangement is such that the temperature coefficient of voltage at the voltage reference node is less than that across the first diode.

Abstract: Electromagnetic machines of the type having circular arrays of permanent magnets arranged on a rotor and a plurality of pole pieces arranged on a stator, requires that a maximum number of pole pieces be arranged around the stator in order to attain maximum utilization of the magnetic flux and to minimize interpole flux leakage. The instant stator of an electromagnetic machine includes a plurality of U-shaped pole pieces, with adjacent ones of the pole pieces opening in opposite radial directions from an axis of the stator. The pole pieces which open radially inwardly are stepped so as to have a relatively thicker portion radially outwardly from the axis and a relatively thinner portion radially inwardly from the axis. Thus, the number of pole pieces that can be arranged around the stator is maximized, as is the utilization of magnetic flux, and interpole flux leakage is minimized.

Abstract: A method of reproducing characters or symbols in place of orthodox typing or printing comprises applying ink to successive points on the paper or other surface by means of a transducer forming a typehead, and building up each character by steering the transducer under the control of digitally stored information which may be selected from the store by a keyboard. The characters can be built up as a series of overlapping dots and each character may have a number of key points, the transducer moving along one of a limited number of pre-set paths from each key point to the next.