DE638763C - Arrangement for the simultaneous change of self-induction and capacitance of an electrical oscillation circuit - Google Patents

Description

One is in the receiver and transmitter construction

Tried for a long time to build oscillation circuits, which are used for tuning, in such a way that the The change in self-induction or capacity or both takes place in such a way that

the ratio remains constant. The up to

previous solutions consisted in using a variable capacitor with a variometer coupled or that one is self-induction divided into different sections. The disadvantage of this arrangement is that in the first case this arrangement is expensive and takes up a lot of space and in the second Fall that

CR

Ratio not constant

is, but in leaps and bounds depending on the number of subdivision levels of self-induction changes. Furthermore, as is known, the wave switch often gives rise to disturbances and brings with it in addition, the disadvantage of harmful cable routing with it.

With self-inductions, whose lines of force are partly in a magnetic core low magnetization losses, the self-induction coefficient can be changed in a manner known per se Changing the air gap between several core parts or by moving the core take place in the force field of the coil.

According to the invention are now with electrical oscillation circuits with the aforementioned Self-induction the self-induction and the variable capacitor so designed and mechanically connected to each other that the movable core parts of self-induction at the same time represent or carry the capacitor assignments.

The idea of the invention will be explained with the aid of a few exemplary embodiments. In Fig. 1 is the device is designed in the manner of a variable capacitor. A plurality of plates 1 are on the webs 3 and 4 or 2 attached at the same distance from each other, so that two comb-like bodies develop. The plates 1 and 2 form the capacitor assignments; the capacity will by rotating one group of plates around an axis into the other group or by moving one group of plates

*} The patent seeker stated as the inventor:

Dipl.-Ing. Hermann Rensch in Berlin-Siemensstadt,

changed in the direction of the plane of the plates in a manner known per se. On the webs 3, 4 as cores sit between the plates ι or 2 self-induction coils 5, dig: all are connected in series with one another. ^Ώ ""'* ^: the entanglement of the plates 1 for the purpose of increasing the capacitance at the same time also reduces the magnetic resistance of the path of the lines of force for each coil and thereby increases the self-induction coefficient.

Another embodiment is shown in Figs. 2 to 4. Here are the coils or Coil groups 7 applied to cylindrical hollow bodies 6, in which to enlarge of the self-induction coefficient, a cylindrical body 8 is immersed in it. The capacitor assignments are attached here on the inside of the hollow cylinder and on the jacket of the core. The core can too be hollow and even form an occupancy of the capacitor. Fig. 5 shows a similar design. Here the coil carrier and core are not cylindrical, but rather conical. Similar to Fig. Ι also arrangements according to the Suggestions made in the other figures can be combined to form a battery. To get that in the vote

the ratio -γ ^ - remains constant, becomes the

Moving parts or the attached winding are given a suitable shape. In In Fig. 2 the core is beveled at 9; in Fig. 3 it has a conical recess 10; in Fig. 4 a conical tip 11. The turns of the winding have a slope increasing to the right in Fig. 3. The same effect is shown in Fig. 5 achieved by ■ the different diameters of the windings. With an arrangement According to Fig. 1, the sub-coils can be of different sizes.

Care must be taken that losses are largely avoided. This is done except by using as loss-free material as possible for the coil carriers in a known manner in that the magnetic cores are made of material that minimizes eddy currents and hests. has resis losses. To avoid that the capacitor assignments short-circuit turns Form for the winding, the assignments are slotted in a known manner.

Claims (10)

Patent claims: i. Arrangement for the simultaneous change of the self-induction and the Capacity of an electrical vibration " circle, in which the lines of force of the self-induction coil run partly in ferrous core material with low magnetization losses and a, ...- change in the self-induction coefficient by a corresponding change- ^! ~ y processing of the magnetic resistance of the force line path is achieved by means of movable magnetic core parts, characterized in that the self-induction and the variable capacitor are designed and mechanically connected to each other so that the movable core parts of the self-induction simultaneously represent or carry the capacitor assignments. 2. Arrangement according to claim 1, characterized in that the capacitor assignments each consist of a number of plates (ι, 2) that are parallel to one another are fastened at the same distance to one web (3, 4) each and by rotating the web or shifting it in The direction of the plane of the plate intermesh, while the self-induction consists of coils (5) connected one behind the other, mounted on the web (3, 4) as a core between the plates (1, 2) are. 3. Arrangement according to claim 1, characterized in that the self-induction consists of a winding (7) applied to a hollow body (6) and one assignment of the capacitor on the inner wall of the hollow body (6) and the other occupancy on a corresponding shaped core (8) made of magnetic material are attached to the vote more or less in the hollow body is pushed in. 4. Arrangement according to claim 3, characterized in that the core (8) even which forms an occupancy of the capacitor. 5. Arrangement according to claim 3, characterized in that the hollow body (6) and the core (8) are designed as cylinders. 6. Arrangement according to claim 3, characterized in that the hollow body (6) and the core (8) are conical. 7. Arrangement according to claim 1, characterized in that the parts of the system is given such a shape that when L and C change relationship C- R remains constant. 8. Arrangement according to claim 1 to 3 and 7, characterized in that the Pitch of the turns or the Order or size of the sub-coils is different. 9. Arrangement according to claim 1 to 3 and 7, characterized in that the The core has a bevel or cavity at the end dipping into the hollow body. 10. Arrangement according to claim 1, characterized characterized in that the capacitor assignments are slotted. 1 sheet of drawings