Abstract: A corona effect sound emitter including a discharge electrode producing corona discharge and surrounded by a spherical counter electrode is partially inserted in a housing which encloses a high frequency generator, modulation transformer and a power supply transformer of which the power supply transformer supplies the discharge electrode with electric current. A thin plate of a magnetic metal transversally extends in the housing so that secondary windings of the transformers are positioned above the plate and are separated from the primary windings of the transformers disposed below the plate.

Abstract: A vacuum cleaner having a suction nozzle which is connected to the cleaner by means of a suction hose and an operating handle and a tubular shaft. An adjustment knob is mounted on the operating handle for varying the speed of the electric motor. The speed is controlled by a variable resistor which has electrical conductors arranged in the vacuum cleaner hose. The conductors are connected to a first coil which surrounds the end of the hose. A second coil in the vacuum cleaner surrounds the first coil concentrically and is connected to the electric control device for the vacuum cleaner.

Abstract: A cooker apparatus for heating a cooking pot inductively comprises an induction heating coil and a control device for controlling the heating power. The control device has a temperature-dependent guiding and control means and a sensor unit, adapted to be positioned on the cooking pot and subjected there to the evolution of steam in the cooking pot. The sensor unit is arranged to transmit control signals to the guiding and control means.

Abstract: An electric toothbrush housing contains a motor, a battery and a secondary coil coupled to charge the battery. An elongated magnetic core is disposed within that secondary coil. A well is defined in a base which receives a portion of the housing within which the secondary coil is positioned. In that base is a primary coil for inducing magnetic energy into the secondary coil. Disposed within the primary coil is an elongated stud of magnetic material. It is aligned axially with the core, so that respective end portions are mutually adjacent. One of those end portions is generally cup shaped and the other is formed and relatively oriented to nest within the first.

Abstract: A coaxial inductive coupler having an inner magnetic core member and a surrounding outer magnetic core member each having respective windings. The inner magnetic core is operatively carried by an inner support assembly which is additionally connected to an outer protective shell. The outer core is disposed within a cylinder having at the end thereof a large guide member for facilitating insertion into the outer protective shell. A locking mechanism is provided to insure positive coupling and easy release.

Abstract: A cooker apparatus for heating a cooking pot inductively comprises an induction heating coil and a control device for controlling the heating power. The control device has a temperature-dependent guiding and control means and a sensor unit, adapted to be positioned on the cooking pot and subjected there to the evolution of steam in the cooking pot. The sensor unit is arranged to transmit control signals to the guiding and control means.

Abstract: In the exemplary disclosure, a signal transmitter and a signal processing part, which are interconnectable in the signal path by means of a contact plug, have a galvanically separative coupling location in the signal path with primary and secondary coupling members. The object is to design a plug-in connection that demonstrates a particularly good insulation effect. This is achieved in that of any given two inter-associated primary and secondary coupling members one of the two coupling members is disposed in the contact plug part on the side of the signal processing part and the other is disposed in the corresponding plug-in contact part of the signal transmitter so that upon establishment of the plug contact between the signal transmitter and the signal processing part the coupling members join together in spatial proximity as primary and secondary coupling members to form a coupling location.

Abstract: The rod-shaped core portion carrying the high-voltage secondary winding is separated from the U-shaped core portion carrying the primary winding by an insulating partition integral with an insulating casing that both provides galvanic separation between the primary and secondary parts of the transformer and also defines the so-called air gaps of the core.

Abstract: An improved automotive ignition analyzer is provided for use with electronic ignition systems. A quadrature field magnetic pickup is utilized to detect signals in the secondary circuit of the ignition system. An adaptor including a voltage clamp is connected to the tachometer lead of the electronic ignition system so that a power balance test may be performed in the conventional manner without harming the electronic ignition system.

Abstract: An information transmitting system by means of a coded magnetic signal permitting adjusting the options in a fuze. A primary winding magnetically induces a coded current in a secondary winding located within a housing. A conductive short-circuit ring is located between both windings for concentrating the magnetic flux within the receiving winding, and thus reducing the magnetic losses.

Abstract: An electrical connector for applications where reliability and safety are needed uses transformer couplings made in two separable sections. Upon clamping together the surrounding metal housing halves, each inductively coupled pair of transformer windings is enclosed by the associated cup-type ferrite magnetic core to minimize undesired interference and result in good magnetic coupling.

Abstract: The primary and secondary core sections of a split core transformer forming an inductive coupler are secured within separate sealed containments in intimate contact with a thin non-magnetic portion of the respective containments which permits inductive coupling and decoupling of the primary and secondary core sections in corrosive fluid environments such as water. The sealed containments isolate the core sections from contact with the corrosive environment thus permitting the use of efficient laminated iron in otherwise corrosive environments.

Abstract: An inductive connector has two coils which are inductively coupled when the two parts of the connector are "connected." Associated with one of the parts is a third coil which is movable, normally automatically, into inductively coupled relationship with the other coil of that part when the parts are separated. An impedance is connected in circuit with the third coil, whereby impedance matching with a source connected to the aforesaid other coil of that part can be achieved when the parts are separated.

Abstract: In the exemplary disclosure, a signal transmitter and a signal processing part, which are interconnectable in the signal path by means of a contact plug, have a galvanically separative coupling location in the signal path with primary and secondary coupling members. The object is to design a plug-in connection that demonstrates a particularly good insulation effect. This is achieved in that of any given two inter-associated primary and secondary coupling members one of the two coupling members is disposed in the contact plug part on the side of the signal processing part and the other is disposed in the corresponding plug-in contact part of the signal transmitter so that upon establishment of the plug contact between the signal transmitter and the signal processing part the coupling members join together in spatial proximity as primary and secondary coupling members to form a coupling location.