An oscillating reluctance motor includes a rotor having a center on which a rotational shaft is fixed thereto, and a pair of teeth protruding from said rotational shaft and arranged in positions opposite to each other; a stator in which a cylindrical space is formed so that the rotor can rotate and first and second winding parts are formed; rotation control means which is installed between the rotor and a stator to control rotation of the rotor, wherein a first winding coil is wound on the first...

Polymeric tetraaroxyperylene-3,4,9,10-tetracarboxylic diimides of the formula I ##STR1## (R.sup.1 : denotes identical or different aryl radicals which may be substituted by cyano, nitro, halogen, C.sub.1 -C.sub.18 -alkoxy, C.sub.5 -C.sub.7 -cycloalkyl and/or C.sub.1 -C.sub.18 -alkyl and may each contain up to 24 carbon atoms; R.sup.2 : denotes C.sub.2 -C.sub.30 -alkylene groups whose carbon chain may be interrupted by from 1 to 10 oxygen atoms in ether function or by a phenylene or cyclohexylene...

An electromagnetic traction motor is used to impart a linear motion on a movable member. A contact plate is mounted to a slide of the movable member. The contact plate has a surface which is in mechanical contact with the electromagnetic traction motor which is preloaded against the surface of the contact plate. The electromagnetic traction motor has a center body part with a triangular shaped portion. The triangular shaped portion forms a bearing surface. Below the bearing surface a deformable ...

A support structure is provided for recessing below the upper surface of a floor or walk and an elongated horizontal grill is mounted from the support structure and includes a plurality of elongated horizontally laterally spaced apart grill members spaced longitudinally along and extending transversely of the grill. The grill members are free of interconnecting structure throughout substantial portions of their length aligned longitudinally of the grill and a pair of parallel rollers are journal...

A modified form of apparatus is disclosed, and the preferred and illustrated embodiment thereof utilizes a pulse width modulator circuit to control the duty cycle pulses applied to coils for rotating an engine. The pulse width modulator (PWM) cooperates with an engine distributor system to generate a procession of pulses which are in turn applied to a power transistor to switch the transistor off and on in timed sequence. This applies power to coils for a magnetic engine. Moreover, two coils are...

An electric motor having an electromagnetically operated clutch automatically engageable to lock the motor shaft against rotation in at least one direction. Embodiments are described in which interruption of the power to the motor causes engagement of the clutch and in which application of power to the motor causes disengagement of the clutch. Also disclosed is an automatic sliding door assembly operated by an electric motor having an electromagnetically operable clutch which is engaged on inter...

A method of verifying and inspecting the bearing gap between a shaft and a shaft seat of a hydrodynamic bearing includes positioning the shaft in its functional position in the shaft seat of the test bearing. A measuring fluid is then caused to flow through the bearing gap. One or more parameters characterizing the fluid flow through the bearing gap can then be measured. Because these parameters of the fluid flow are affected by the dimensions of the bearing gap, the bearing gap can thus be reli...

A planar-type cathode for electron discharge devices which is in relatively close-spaced relation with another electrode and which is provided with means for preventing bowing toward the electrode under thermal stresses.

A machine for cleaning the soles of shoes such as bowling shoes. A rotary brush for cleaning leather shoe soles and an elastomeric roller for cleaning rubber shoe soles are mounted on a hinged platform along with a drive motor and a fan which is used to dry the shoes. The machine is equipped with a solid state circuit which provides an attract sound periodically and a sound which simulates the sound of an electric motor during operation. A power boost arrangement permits operation of the machine...

The present invention relates to a discoid machine having a rotor and a stator placed facing each other along the axis of rotation of the rotor. The machine is synchronous and has at least two rotors disposed on either side of a stator.