SU30180A1 - Variable capacitor - Google Patents

Description

The present invention relates to electrical capacitors, and in particular, to variable capacitors used in radio engineering. Typically, such capacitors consist of several sections, each of which contains a set of fixed plates, a set of movable plates and a common shaft controlling the movable plates, by means of which you can simultaneously adjust the position of all movable plates relative to the stationary ones.

It is very difficult and impossible to make all sections of a capacitor identical with respect to capacity at all points.

The aim of the invention is a separate device for each of the sections of the capacitor, due to which it is possible to adjust the capacity of each section with respect to the section whose capacity should remain constant.

In the devices of the previous design, the adjusting devices were such that the adjustment affected the entire

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condenser characteristic. The purpose of the present invention is a regulating device which would influence only a part of the characteristics of the capacitor.

In the present invention, it is used for the purpose of adjusting a slotted plate in a set of clamped or fixed plates. Such a design allows, by bending the sectors of the movable plate, only a part of the capacitor characteristic, and by bending the sectors of the fixed plate system, it affects the whole characteristic of the capacitor.

Thanks to the present invention, it is possible, taking in any three capacitors of the same design, to adjust their characteristics so that they match or are in a given relation to a friend.

Although the sectors of the cut plastic, the condenser can be adjusted by hand, in some cases it is recommended to make adjustments mechanically, for example, by means of a micrometer screw, and each screw should have a separate screw. . The capacitor plates are provided with radial or non-radial pro: cuts. The advantage of non-radial shrorezov is that the adjustment does not cause abrupt changes in the characteristics of the capacitor and this change occurs gradually. In FIG. 1 is a perspective view of a multi-section capacitor; FIG. 2-cross section of the capacitor; FIG. 3 is a cross section of another embodiment of the capacitor; FIG. 4 is a top view of a capacitor version with a regulating .micro metric screw; FIG. 5 is a variant of a capacitor, with a screen mounted on the shaft between the sections; -fig b-characteristics of the three sections of the capacitor before and after adjustment. The condenser consists of a frame 2, made, for example, of metal. A shaft 3 is mounted on the frame, one end of which is terminated by a disk serving to rotate the shaft. Three capacitor sections A, B, and C are mounted in the frame. Each section consists of one set of moving plates, 5, 6, and one set of fixed 7, 8, 9. The sets of fixed plates are separated from each other and from frames 2 with strips of insulation material Y in order to be able to connect sections with individual chains or parts of chains, for example, in a radio receiver. Equally, one can isolate each other from one another and mobile components. During the initial assembly of the device shown in FIG. one, . it is usually unregulated, i.e., the capacitances of the sections are not the same at all positions. In order to regulate, each of the adjustable sections L and C is provided with a slotted plate (plates // and / 2). It was found that, by bending one or “several sectors, a, 6, from such a plate, it is possible to adjust the capacity of the corresponding section with respect to the capacity of the middle section B. Similarly, you can adjust the capacity of section A with respect to the capacity of the middle section B. When In this method of adjustment, the capacity of the middle section is taken as if it were standard and, accordingly, sections A and C are adjusted to it. In the design shown in FIG. The slotted plate represents the outermost of the movable plates, and in the construction of FIG. 3, this plate is also extreme of fixed plates.) The subject of the present invention is a capacitor in which the individual sections can be adjusted independently of one another, and can be adjusted by means of fixed or movable plates. Zatey can affect the characteristics of the capacitor as a whole or on its part, sharply or smoothly. Using the micrometer screw shown in FIG. 4, it is possible to make a definite and precise adjustment, as opposed to random adjustment, without using screws, depending on the elasticity of the plate material. In view of the fact that, bending the plate by hand, it is impossible to determine exactly; what kind of arching will be sufficient, each of the sectors d, b, f, J, etc., is equipped with screws / 2. By turning the screws, it is possible to force the sectors of the fixed plates to move in or move backward by a certain exact amount. In order to apply the micrometric adjustment in the design shown in FIG. 2, the screws are located on a circular disk mounted on the shaft (disks // and / 5). In this case, the capacitor sections can be located closer to each other, since the disks 4 and 15 serve as screens. With discs as shown in FIG. 5, slotted plates may be located between the sections, and not at the edges of the sections, as shown in FIG. and 3. T With the described adaptation, it is necessary to adjust the fixed or movable plates with a micrometric intra / nnt. The subject of the patent. An electric capacitor of variable capacitance, consisting of several separate systems with a common axis of rotation, characterized in that the extreme plates of the moving or stationary systems are cut each from the periphery itself towards the center, in order to bend the individual

parts, b, from the plates it was possible to level the dependence of the capacitor capacitance on the angle of rotation in separate sections with respect to the section whose plates were not cut.

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