An oscillating motor has a rotor rotation of about .+-.15.degree. from a rest position. The rotor has two salient poles which face a respective permanent magnet across a small air gap. The stator has a laminated stator core supporting the magnets and also two salient poles each supporting a stator coil. The stator poles confront the rotor across a small air gap between the rotor poles. When no current is flowing through the coils, the rotor rests in a rest position with the poles aligned between...

A vibration motor and an electronic device utilizing the same. The vibration motor is disposed in a housing to abut the housing. A first case is disposed in the housing. A second case is combined with the first case. A magnet and a rotor are disposed between the first and second cases. A shaft passes through the magnet, the rotor, and the second case, and is rotatably disposed on the first case. A weight is exposed by the second case, and connected to the shaft passing through the second case. T...

A micro-electro-mechanical system (MEMS) power generator employing a plurality of magnetic masses disposed to oscillate on spring elements in a manner that produces an unusually steep flux gradient at one or more conductive coils, thereby harvesting a substantial portion of the available mechanical energy. The energy from ambient mechanical vibration is harvested to produce electrical power sufficient to power individual electronic elements for a variety of low-cost and high-performance distribu...

A small electric appliance with a drive mechanism for generating an oscillatory motion of at least one working unit of the small electric appliance. The drive mechanism has a first drive component, a second drive component and a coil for producing a magnetic field that extends from the first drive component and acts on the second drive component that is movably arranged in the small electric appliance, in such a way that the second drive component is set in an oscillatory motion. The first drive...

A method and apparatus for increasing the reliability of linear drive devices of a nuclear reactor to scram the control elements held in a raised position thereby. Each of the plurality of linear drive devices includes a first type of holding means associated with the drive means of the linear drive device and a second type of holding means distinct and operatively dissimilar from the first type. The system of linear drive devices having both types of holding means are operated in such a manner ...

A rotary actuator (16) includes a rotor (48) which is disposed in a housing (34) between first and second pole pieces (42 and 44) of a stator (40). The rotor (48) is rotatable relative to the stator (40) between an unactuated position (FIG. 4) and an actuated position (FIG. 5). During rotation of the rotor (48), the axial extent of a first working air gap (66) between the rotor and a first pole piece (44) of the stator (40) remains constant. However, the axial extent of the working air gap (64) ...

A nutating coupler arrangement is provided for driving an oscillating mirror movable about an axis of oscillation 12. A driving member 18, which rotates about a driving axis 24, is connected to the oscillating mirror through a coupler 28. The driving axis 24 is offset relative to the plane 34 perpendicular to the axis of oscillation 12 and extending through the pivotal point 30 of the coupler 28 at the oscillating mirror. The coupler 28 makes a nutating motion while the pivotal point 30 makes an...

An actuator includes a casing, a stationary member having a coil member and mounted in the casing and a movable member having a moving element and supported by the casing. The moving element has a shaft and is supported by the casing so as to be moved in an axial direction of the shaft and in a rotational direction having the axial direction of the shaft as its rotational axis and the moving element is moved in the axial direction and in the rotational direction by causing electric current to fl...

an electric appliance includes an electric motor having a first oscillatory element, a second oscillatory element and an electric coil configured to generate a magnetic field to drive the first and second oscillatory elements. The electric appliance also includes a movable component and a first spring element connecting the movable component to the first oscillatory element. Notably, the first oscillatory element and the second oscillatory element are arranged to drive each other in oscillatory ...

The invention relates to a vibrator for acting on an object in a predetermined direction, comprising a casing and two identical, synchronously driven, electric linear motor coils arranged mirror-symmetrically therein, between which coils there is an armature which can be moved to and fro in an oscillatory fashion by driving the linear motor coils appropriately in their longitudinal direction, the armature being mounted via wires arranged under spring bias in the casing, and also to an apparatus ...