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 metallic ion sorber capable of absoring ions of a metal excluding iron and cobalt and a method of sorbing ions of a metal excluding iron and cobalt are disclosed. The sorber comprises an ethylene copolymer containing from 40 to 95% by weight of ethylene and from 5 to 60% by weight of at least one of aminoalkyl acrylate compounds represented by formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2 and R.sub.3 each represents an alkyl group having from 1 to 4 ca...

A system useful for indicating the entry of a vehicle onto a specified area of the earth's surface. The system includes a magnetic field sensor which yields an output signal indicative of the magnetic field intensity thereat. The sensor is mounted adjacent to but outside of a volume being monitored which constitutes the projection of the specified area in the direction of the magnetic field thereat. When the magnetically permeable mass of a vehicle enters the volume being monitored, it increases...

A system useful in service stations and the like for indicating the entry of a vehicle onto a specified area of the earth's surface. The system includes a magnetic field sensor which yields an output signal indicative of the magnetic field intensity thereat. The sensor is mounted adjacent to but outside of a volume being monitored which constitutes the projection of the specified area in the direction of the magnetic field thereat. When the magnetically permeable mass of a vehicle enters the vol...

A starter that can improve heat radiation efficiency and improve the brush life. An upper movable contact is set on the end of a plunger shaft fixed on a plunger. The upper movable contact moves together with the plunger due to the attraction force of an attraction coil and contacts a fixed contact set to face the upper movable contact and which is connected to a terminal bolt. The upper movable contact is directly installed and integrated with a brush, so the heat generated by the bush is effic...

A rotary solenoid, particularly for use in electronic teleprinters and the like, especially for attachment perforators, etc., in which most of the metal components may be fabricated in the form of stamped sheet metal structures rather than turned or machined components and which is relatively readily adaptable to automatic fabrication, the stator poles being in the form of stamped sheet metal laminations disposed in respective aligned stacks at opposite ends of an actuating coil and provided wit...

A complex dielectric film formed as an insulation film between oppositely facing conductors is made of an insulator and a non-insulator. The insulator and the non-insulator are formed to align in series in a serial model, to contain the non-insulator in the insulator in a serial-parallel model, and to align in parallel in a parallel mode 1. The insulator may be SiO.sub.2, Si.sub.3 N.sub.4, or other like material, and the non-insulator may be a metal, semi-metal, semiconductor containing conducti...

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...

Tridimensional cross-linked random copolymers, insoluble in water, containing in copolymerized form: (a) 25% to 98% by weight of N-[tris(hydroxymethyl)methyl]acrylamide or N-[tris(hydroxymethyl)methyl]methacrylamide, or a mixture of these two compounds. (b) 2% to 50% by weight of one or more monomers containing two or several polymerizable ethylenic double bonds and free from anionic or cationic functional groups, and (c) 0.1% to 50% by weight of one or more monomers containing a polymerizable e...

The device comprises an electric motor having a planar airgap the rotor of which constitutes a flywheel capable of being coupled frictionally with a plate rigid with the shaft of the heat engine to be started. For this purpose, the motor is axially movably mounted in a case between an uncoupled position to which it is biased by a spring and a position in which it is coupled with the plate. The motor is brought to the latter position by the excitation of a clutch coil carried by the rotor and exe...