DE1210081B - Variable capacitor - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

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GERMAN #H PATENTAMT Int. α .:

EDITORIAL

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German KL: 21g-10/01

Number: 1210 081

File number: D 42132 VIII c / 21 g

Filing date: July 31, 1963

Opening day: February 3, 1966

The invention relates to a variable capacitor with stators offset from one another in the axial direction.

It is already known to have several stators of a variable capacitor one behind the other and between two To arrange insulating plates in which the bearing points for the associated rotor are available. For spacer bracket the stators are made up of several columns in a row between the insulating plates arranged insulating sleeves provided, which are penetrated by retaining screws, including all parts hold the insulating plates together. The stator plates are placed between the insulating sleeves pinched and held that way. Such a construction requires a large number of consecutively arranged parts, so that the manufacture and assembly are cumbersome. aside from that The tolerances add up here, so that the accuracy required for rotary capacitors is only can be achieved with difficulty and through readjustment. . ao

The stator plates arranged between two insulating plates can also be used in a known manner be fastened columnar bolts, which then hold the insulating plates at a distance. With this construction however, the same disadvantages result as in the case of the aforementioned design.

These disadvantages of the known construction are in the case of rotary capacitors with in the axial direction mutually offset stators, which are arranged between two spaced apart by spacers and Isolation plates held together by screw connections are arranged one behind the other and cooperate with corresponding rotor plates, which on a rotor shaft rotatably mounted in the insulating plates, according to the invention avoided that on one half of each insulating plate also serving as a spacer Stator and on the other half an insulating spacer are held and that each one The spacer and the stator behind it in the axial direction of the other insulating plate are the same Have height. In this design, the stator has a minimum of parts, and most importantly, the Spacers at the same time with the insulating plates and the stators and thus with great accuracy and formed at a low cost so that the stator plates are readily assembled with the desired accuracy can be.

This construction is particularly suitable for multiplication, i. H. to form a Package made up of a large number of insulating plates and stators.

Variable capacitor

Applicant:

Paul Dau & Co., Nagold (Württ.)

Named as inventor:

Rainer Burkhardt, Nagold (Württ.);

Karl-Heinz Wehrstein, Öschelbronn

An exemplary embodiment of the invention is shown in the drawing. It shows

F i g. 1 is a front view of a small rotary capacitor according to the invention,

F i g. 2 shows a view in the direction of arrow A according to FIG. 1,

F i g. 3 a view in the direction of arrow B according to FIG. 1,

F i g. 4 shows the individual parts of the small rotary capacitor according to the invention,

FIG. 5 shows a section along line 5-5 of FIG.

The small rotary capacitor shown in the drawing has two essentially identical Capacitor parts 10 and 12, which are connected to one another by means of threaded pins 14 and nuts 16 and thus form a closed structural unit. The capacitor parts 10 and 12 are involved a rotor designated as a whole with 20 together, which will be discussed in more detail below will.

The two capacitor parts 10 and 12 each have one, preferably made of plastic or ceramic material existing square insulating plate 22 and 24, each of the axial length of the corners at their corners Capacitor parts have corresponding spacers 26 and 28. The spacers 26 are like this designed that they, seen in plan view (Fig. 5), completely fill the area of the corners. aside from that they each have a bore 27 for the threaded pins 14 in the axial direction. The spacers 28 against it are designed as narrow webs, while the holes 29 for the threaded pins 14 in their area only go through the insulating plate 22 and 24, respectively.

With the insulating plates 22 and 24, there is a stator packet each having a plurality of capacitor plates 30 or 32, for example by pouring into the insulating panels or by gluing, firmly connected. The stator cores are arranged relative to one another in such a way that they are rotated by 180 ° in the circumferential direction

609 503/293

Claims (1)

1 210 ÖSl are offset. On their longitudinal outside they have recesses in the area of their corners? 33? and 53, into which the spacers 28 of the insulating plates 22 and 24 fit in the assembled state of the capacitor. Furthermore, the stat packages 30 and 32 have drill holes & S 'for the threaded pins 14 directly next to the above-mentioned recesses 31 and 33. ... ... - The insulating plates 22 and 24 each have a bearing for the rotor 20 in the area of their central part. For this purpose, the insulating plate 22 has a recess 34 into which a bearing plate 16 provided with an opening is inserted. The opening in the bearing plate is aligned with a bearing hole 38 in the insulating plate 22, into which a bearing journal 40 of the rotor shaft 42 engages. In its central area, the rotor shaft 42 has a ball bearing 44 which is arranged in a bearing shoulder 46 that is integral with the insulating plate 24. The ball bearing 44 is covered to the outside by means of a bearing bush 48. ■ · ■!, -. On the rotor shaft 42 there are also two rotor stacks 50 offset by 180 ° in the circumferential direction and 52, the capacitor plates of which are arranged so that they are rotated when the rotor shaft is rotated 42 more or less adjustably engage in the spaces between the stator packs 30 and 32, respectively. When assembling the capacitor, the two insulating plates ¹ 22 and 24, which at the same time form the housing for the capacitor, are moved towards one another. The spacers 26 each come partially to rest against the opposite stator core and the opposite narrow spacer 28. The individual threaded pins 14 are pushed into the now aligned holes and fastened with the aid of the nuts 16. In order to keep the individual parts, in particular the stator cores 30 and 32, in a predetermined position relative to one another or to facilitate the assembly of the capacitor, one-piece contact pieces are provided on the insulating plate. 54 is provided (see, in particular, FIGS. 2, 4 and 5). ■. Patent claims: ίο 1. Variable capacitor with in the axial direction offset stators, which are arranged between two by spacers at a distance and by screwing together held insulating plates are arranged one behind the other and cooperate with corresponding rotor plates, which on one in the insulating plates ■; ν. rotatably mounted rotor shaft are attached, characterized in that on the .. one half of each. Isolation plate (22,24) a zuao same as. Spacer serving stator (30,32) and. on the other ^: half an insulating spacer (26) are held and that each one spacer (26) and the one in the axial direction. underlying stator (30,32) of the other insulating plate (20,24) the. have the same height. 2. Variable capacitor according to claim 1, characterized in that the stators (30, 32) and the spacers (26) in the direction of the rotor axis. the same dimensions are approaching.
3-. Rotary capacitor according to Claim 1 or 2, characterized in that the spacer (26) is glued to the associated insulating plate (22, 24) or is made in one piece with it. Considered publications: German Auslegeschrift No. 1 128 563,
9251133 828. 1 sheet of drawings 609 503/293 1.66 © Bondesdruckerei Berlin