Abstract: A system for verifying the location of physical features on complex magnetic elements, such as magnetic rotors, for driving an electrostatic shutter. A magnetic rotor of the type measured by the magnetic measuring apparatus of the invention has a plurality of magnetic poles and physical features arranged thereon. Each one of both the magnetic poles and physical features has a spatial and magnetic field relative to one another which is rapidly measured by the magnetic measuring apparatus using a dual probe Gaussmeter and encoder means operably connected to a data comptroller.

Abstract: A permanent magnet micro-rotor comprises a cylinder of magnetic material having a plurality of spaced-apart slots disposed around the periphery of the magnetic material. The magnetic material is magnetized by placing conductors in the spaced apart slots and energizing the conductors so that magnetic poles are formed between the spaced-apart slots.

Abstract: An apparatus for magnetizing one or more elements having a predetermined outer surface shape, the apparatus comprises one or more permanent magnets having a cavity therethrough which cavity includes a shape conforming substantially to the shape of the outer surface of the one or more elements. The magnets also create a magnetic field that passes into the cavity. The one or more elements are disposed on a support operator for magnetization so that the one or more elements are magnetized when inserted into the cavity.

Abstract: A method of making stepper motor includes: providing a permanent magnet rotor carried by an output shaft; forming a bobbin having an alignment feature, a bearing opening for supporting the shaft, and a passage for receiving the permanent magnet rotor; forming a magnetically soft stator-yoke located around the inside of the passage; winding a coil of electrically conducting wire around the bobbin; and providing a motor housing for receiving the bobbin and where the motor housing has a corresponding alignment feature to align the bobbin with the housing.

Abstract: Image processing equipment(100) has a thermally activated write head element (200) that builds up heat during operations and an improved heat exchanger assemblage (300) having a high surface area heat sink (312) that absorbs and then dissipates the heat. Heat exchanger (300), structurally connected to the write head element (200), includes an air moving means (304) having a backward curved impeller (306) driven by a compact planar de motor for producing higher impeller speeds with superior thermal transfer performance.

Abstract: An improved heat exchanger (10) has a heat sink (22) with fins (24) having a very high heat transfer coefficient structurally associated with a compact, high air velocity air moving means (14). Air moving means (14) of the invention employs a backward curved impeller (16) driven by a compact planar dc motor (50) adapted to yield higher than normal impeller speeds with superior thermal transfer performance.

Abstract: A flat brushless motor of small size comprising:a thermally conductive base member;a plurality of motor coils fixedly attached to said base member; anda rotor assembly mounted proximately to said plurality of motor coils said motor assembly having a multiple pole permanent magnet incorporated therein.