DE6752497U - TUNING DEVICE WITH CAPACITY DIODES - Google Patents

Description

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Patent collecting society

m.b.H.

Ulm / Danube

Elisabethcüstrasse 3

Hanover, May 22, 1968 / GmW 64-9

Shutdown device with capacitance diodes

In a tuning device with capacitance diodes for devices ae. As is well known, communications technology will use the diodes to vote a variable DC voltage is supplied. The setting of the DC voltage can be done with a potentiometer, with a push- button set by switching on preset DC voltages or with a flat track controller. With a well-known Equipment with a Flaehbahn regulator with a slide are in Slide direction of the slide several, separate from one another, swept over by the same slide and different wave areas associated resistance tracks provided. If the slider is from One resistance track runs on the other, a wave range control must be used be performed. In the known arrangement, this switching takes place in that the slide with an additional contact to suspect different contacts runs and effects electrical wave range switching.

The task of 3 is to measure the waveband simplify.

jjie firing ordered daxin that between the resistance tracks a wave range switchover operated by deia Sehieber aecikairLscli

ter is ordered. H / ^ - "/ / I U

- 2 - GmW 649

The firing is explained in the following with reference to the drawing, show it

Pig. 1 an embodiment of the innovation and Pig. 2 the design of the waveband switch.

1 shows a tuning device which can be inserted into a housing of a television receiver and has a flat path regulator. This consists of a resistance track 1 for TV band I, a resistance track 2 for TV band III, a slide 3 »which taps an adjustable DC voltage with a contact 4 · from the resistance tracks 1, 2 and a potentiometer 5 and a contact 6 on eise ait des stupid verbimdene contact path 7 transmits. For the TV bands IY and 7, a further slide 8 is provided with resistance tracks not visible in the drawing. The ¥ resistance paths 1 .2 rrnfl the contact paths? are applied to a circuit board 17, for example printed. The tuning unit also contains setting means 9, 10, 1. for contrast, brightness and volume, a push button 12 activated by pressing the button 9, a printed circuit board 1 $ accommodating circuit elements, as well as buttons 1 *, 15 serving to switch between VHF and TJHF.Hit the slider 5 can optionally be one for voting DC voltage used in band J from resistance track 1 Txnsi a DC voltage used for coordination in band ΓΓΙ is tapped from resistor track 2 . over the contact track 7 are transferred to the diodes «

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a rocker-shaped yellenbereichunischalter 16 is provided

- 3 - GmV 649

Pig. 2 shows the implementation of this Vellenbereichumschalteijs 16. This consists of a rocker-shaped actuating member 18 with two projections 19 »20, the contact surfaces 21,22 carries, which together with Eontaktfedern 23 form the waveband switch.

For example, if the slide 3 in Fig. 1 from above, the resistance path Leaves 2 and runs onto the resistor track 1, acts a gate jump 24 of the slide 3 on the projection 19 of the Actuator 18 and swivels it in the direction of the arrows 25 (# ig · 2), which then short-circuits other contact springs 23 and the frequency range is switched to band I. Whom the slide 3 is pushed from the resistance track 1 onto the resistance track 2, conversely the projection 24 acts on the projection 20 and pushes the Vellen range switch back into the position corresponding to Volume III.

Claims (1)

- 4 - Gni ¥ 649 fiA.311943.3a S. fil 1. Tuning device with varactor diodes for a device in communications technology> in particular an Iferase receiver, in which the bias voltage for the diodes is set with a flat track regulator, which has a slide and several wave ranges that are located one behind the other in the slide direction of the slide and are swept over by the same slide has associated resistance tracks, characterized in that between the resistance tracks (1, 2> a wave range switch (16) mechanically operated by the slide (3)) is arranged. The waveband switch (16) is designed as a rocker switch, 2. Έinrichtung according to claim 1, characterized in that the its rocker-shaped actuating member (16) with two projections (19,20) protrudes into the path of the slide (3), 3- device according to claim 2, characterized in that the \ set actuating member (16) consists of a flat part around the an axis perpendicular to its plane and to the direction of displacement of the slide (3) can be pivoted, at one end with two Voi Jumps (19, 20) protrudes into the path of the slide (3) and at the other end bears contact surfaces (21) which are attached to stationary Konfcaktfedern (23) slide along .. Device according to Claim 1, characterized in that the slide (3) has a projection (24) which actuates the shaft range switch (16). - 5 - Ö2s ¥ 649 $. Direction according to .Anspruch 1, because of the standing babnen (1,2), slider {3) and lien (16) combined into a component that can be inserted into the housing of the device are. 6. Set up after. Claims 5? characterized by the fact that the structural unit contains further setting means (9, 10, 11, 14, 15), for example for X-level, tone aperture, brightness, contrast, reset switch or range switching.