DE7009964U - SLIDE RESISTANCE. - Google Patents

Description

The innovation relates to a shift resistor old a plate, on which aind mounted parallel to a rectilinear Tuhrungseebllts for the wiper carrier a atreifenfSmlge Mittelabgriffbahn wa & Wideretandselement a strip-shaped.

If the resistance element consists of a hard pajpier elf, on the the resistance layer is applied, the resistance element in the case of moisture absorption due to the increase in length of the surf paper strip when the resistance element in traditional Way is attached to the Isolieretoifplatte »

With the conventional type of fastening, such as sia ί.Β. in the obm 6 8Ο7 771 is described, the resistance element is riveted or staples fixed at both ends. To avoid bending or bulging of the resistance element, wujrda has so far been distributed in the longitudinal direction, lateral approaches of the resistance element riveted.

This solution has the disadvantage that the bending ^ between. Bulge only divided into smaller sections of the resistance element

will,

The hiring is based on the task of eliminating this disadvantage.

New approximation is proposed according to one end of the resistance element to be rigidly connected to the base plate and to store the other end displaceably in the longitudinal direction of the resistance element.

700998416.7.70

In a first embodiment of the inflation rate, the sliding end is of the resistance element guided in an adapted embossing of its solder connection, which with an integrally formed contact arm on a The end of the resistance layer rests with bias.

A further embodiment of the innovation provides the resistance element to be provided with lateral approaches, with which ea guided through overlapping projections of the base plate in the longitudinal direction is.

In one embodiment of the furnace, the base plate is with a provided on the resistance element adapted recess into which the resistance element inserted and dovetailed through inwardly directed projections of the base plate is guided on the longitudinal sides of the recess in the longitudinal direction.

The last embodiment of the inflation provides for the attachment of the resistance elements according to the above proposals Use multiple sliding resistors.

The furnace and other details are shown on the drawing explained in more detail for various exemplary embodiments.

Fig. 1 shows the section I-I through the sliding resistor,

Fig. 2 shows the top view of the sliding resistor,

Fig. 3 shows another inventive resistance element,

Fig. 4 shows the perspective view of a portion of this Resistance element,

the F ^ g. 5 shows the perspective view of a portion of FIG Base plate,

Fig. 6 shows the perspective view of a portion of a other base plate.

The slide resistor shown in plan view in FIG. 2 consists from an insulating plate (1) in which a guide slot (2) is cut out for a spring carrier, not shown. Through the clamps at their ends, the guide slot is on one side

7/18/70

with the solder connections (13) provided center tap (4) on the Insulation plate attached. On the other side of the guide slot (2) is the resistance element (3), which is on one end (5) with the solder connection (7 *) provided and in known Veise with a tubular rivet (I4) on the insulating plate (1) is attached. The tapered compared to the width of the resistance element Port set (6) of the other end is led through a weak embossing of the solder connection (7). Since, as shown in Fig. 1, the solder joint (7) with its shoulders (I5) on the insulating plate (1), a defined distance is set between the solder connection and the insulating material plate. This distance leaves despite the weak embossing the possibility for the resistance element open, to push through under the solder joint in the event of length expansion. In order to ensure a perfect contact, is on the solder connection (7) a lateral extension (8) is present, which rests on the resistance layer under prestress.

In a further embodiment, the resistance element (3 ¹ ) in Fig. 3 is provided on the longitudinal side with opposing shoulders (9). The ends (5 »6) of the resistance element correspond to those of the exemplary embodiment in FIGS. 1 and 2.

A middle section of the same resistance element is shown in FIG. 4 ready i ⁿ perspective view.

Likewise, only a portion of the insulating plate (i) is shown in FIG. 5. The lateral shoulders (9) of the resistance element (3 ') come to lie under the inwardly directed projections (10) formed on the insulating plate (i). So that the insulating material plate (1) can be produced from plastic in an injection molding process, slots (i6) for the stamps of the injection molding tool are located below the projections (10). During assembly, the resistance element (3 ¹ ) is placed on the insulating plate (1) and then pushed under the projections (1O). The play between the projection and the lateral approach of the resistance element should not be too large, but should be dimensioned in such a way that loose guidance is still guaranteed.

In Pi ₆ * 6 is, similar to in Pig. 5, only a part of an insulating plate (f) is shown. Recesses (11) adapted to the projections (9) of the resistance element (5 ¹ ) are recessed in this. Furthermore, the insulating material plate (I ¹ ) has dovetail-like inwardly directed projections (12) under which there are again slots ζ 16 ') for the stamps of the injection molding tool. During assembly, the resistance element (3 *) »whose lateral lugs (9) are brought congruent with the recesses (11), placed in the insulating ^{plate (1!} ) And shifted in its longitudinal direction.

Claims (5)

■ · · * «ft S chut ζ ana requirements 1) Slide resistance with an insulating plate on which parallel to a straight guide slot for the grinder support a strip-shaped central tapping track and a strip-shaped resistance element are attached, characterized in that that one end (5) of the resistance element (3) is rigidly connected to the base plate (i) and the other end (6) in the longitudinal direction of the resistance element is slidably mounted. 2) sliding resistor according to claim 1, characterized in that the displaceable end (6) of the resistance element (3) in one adapted embossing seinej solder connection (7) is guided, which with a molded contact arm (8) on one end of the resistance layer rests with gate tension. 3) sliding resistor according to claim 1, characterized in that the resistance element (3 ') is provided with lateral lugs (9) is, with which it is through overlapping Yorsprünge (1O) of the base plate (1) is guided in the longitudinal direction. 4) sliding resistor according to claim 1, characterized in that the base plate (I ¹ ) is provided with an adapted recess (11), in which the resistance ^{element (3 1} ) is inserted and by dovetail-like inwardly directed projections (12) of the base plate to the Long sides of the recess (11) is guided in the longitudinal direction. 5) l-Iehrfachschiebewiderstand, characterized in that its resistance elements according to claim 1 and one or more of the following claims attached; are.