DE1234815B

DE1234815B - Channel selector for televisions with a rotating drum

Info

Publication number: DE1234815B
Application number: DE1961R0030951
Authority: DE
Inventors: Carlo Vichi; Guglielmo Cesari
Original assignee: Radio Var Di Vichi Carlo & C S
Current assignee: Radio Var Di Vichi Carlo & C S
Priority date: 1961-04-21
Filing date: 1961-08-17
Publication date: 1967-02-23
Also published as: GB975608A

Description

DEUTSCHES WWTWWP PATENTAMT GERMAN WWTWWP PATENT OFFICE

Deutsche Kl.: 21 a4 - 72/02 German class: 21 a4 - 72/02

AUSLEGESCHRIFT =EDITORIAL =

Aktenzeichen: R 30951IX d/21 a4File number: R 30951IX d / 21 a4

J 234 815 Arimeldetag: 17. August 1961J 234 815 April 17, 1961

Auslegetag: 23. Februar 1967Opened on: February 23, 1967

Die Erfindung geht aus von einem Kanalwähler für Fernsehgeräte mit einer drehbaren Trommel, bestehend aus einer Welle, darauf in axialem Abstand angeordneten Scheiben und in Umfangsrichtung verteilte, langgestreckte Tragelemente aus isolierendem Material, die in Ausnehmungen der Scheiben aufgenommen sind und als Träger für mit einem Abschnitt nach außen ragende Kontaktelemente und zugleich als Spulenkörper für eine Wicklung dienen.The invention is based on a channel selector for television sets with a rotatable drum, consisting consisting of a shaft, axially spaced disks on it and distributed in the circumferential direction, elongated support elements made of insulating material, which are received in recesses in the panes are and as a carrier for with a portion protruding outward contact elements and also serve as a bobbin for a winding.

Bei bekannten Kanalwählern dieser Art besteht die drehbare Trommel aus einer Welle mit darauf in axialem Abstand angeordneten Scheiben, die auf ihren Umfang verteilte Ausnehmungen aufweisen. In diese sind langgestreckte Tragelemente aus Isolierstoff eingelegt, die als Träger für mit einem Abschnitt nach außen ragende Kontaktelemente dienen. Die Tragelemente erfüllen außerdem die Funktion eines Spulenkörpers für eine Wicklung. Bei einer bekannten Ausfuhrungsform müssen die einzelnen Kontaktelemente mit Hilfe einer Nietverbindung an dem schienenförmigen Tragelement gesichert werden. Zur Sicherung der Schienen in den Scheiben sind besondere Vorrichtungen erforderlich. Auch ist die Weiterführung der Wicklung über eine Kontaktstelle hinaus ohne besondere Isoliermaßnahmen nicht möglich. Bei einer anderen bekannten Ausführungsform erfolgt die Befestigung der Kontakte mittels in Ausnehmungen der Tragschiene einzubringenden Befestigungsklappen. Abgesehen davon, daß hierdurch eine stabilere Befestigung ohnehin nur schwer zu erreichen ist, besteht auch die Gefahr eines Lockerns während des Betriebes.In known channel selectors of this type, the rotatable drum consists of a shaft with it in axially spaced discs which have recesses distributed over their circumference. In these are inserted elongated support elements made of insulating material, which serve as a support for with a section outwardly protruding contact elements are used. The support elements also fulfill the function of a Bobbin for one winding. In a known embodiment, the individual contact elements be secured with the help of a rivet connection on the rail-shaped support element. To the Special devices are required to secure the rails in the panes. Also is the continuation the winding beyond a contact point is not possible without special insulation measures. In another known embodiment, the contacts are fastened by means of recesses the mounting brackets to be inserted into the mounting rail. Apart from the fact that this is a A more stable attachment is difficult to achieve anyway, there is also a risk of loosening during operation.

Demgegenüber ist es Aufgabe der Erfindung, einen Kanalwähler der beschriebenen Bauart in der Weise im Aufbau zu vereinfachen und in der Herstellung zu verbilligen, daß das langgestreckte Tragelement und die Kontaktelemente einerseits und das Tragelement und die Scheiben andererseits auf einfache Weise und ohne zusätzliche Hilfsmittel ausreichend fest miteinander vereinigt und zugleich die Kontakte an den Befestigungssteilen nach außen isoliert sind, so daß die Wicklungen ohne besondere Maßnahmen nach Bedarf über eine oder mehrere Kontaktstellen hinaus verlängert werden können.In contrast, it is the object of the invention to provide a channel selector of the type described in the manner to simplify in structure and to make the production cheaper that the elongated support element and the contact elements on the one hand and the support element and the discs on the other hand in a simple manner and without additional aids sufficiently firmly united with each other and at the same time the contacts on the fastening parts are insulated to the outside, so that the windings without special measures as required can be extended beyond one or more contact points.

Diese Aufgabe ist bei der eingangs näher bezeichneten Kanalwählerbauart erfindungsgemäß dadurch gelöst, daß jedes Tragelement aus zwei in einem gegenseitigen Umfangsabstand angeordneten parallelen Schienen besteht, die auf den einander zugewandten Flächen Schlitze zur losen Aufnahme eines zugleich aÄs Abstandshalter für die Schienen dienenden Abschnittes der Kontaktelemente aufweisen, zwischen Kanalwähler für Fernsehgeräte mit einer
drehbaren TrommelThis object is achieved according to the invention in the case of the channel selector design described in detail at the outset in that each support element consists of two parallel rails arranged at a mutual circumferential distance, which have slots on the facing surfaces for loosely receiving a section of the contact elements that also serves as a spacer for the rails, between channel selectors for televisions with a
rotatable drum

Anmelder:Applicant:

RADIO-VAR di VICHI CARLO & C,
S. a. s. (Kommanditgesellschaft),
Mailand (Italien)RADIO-VAR di VICHI CARLO & C,
S. as (limited partnership),
Milan (Italy)

Vertreter:Representative:

Dipl.-Ing. F. Thieleke, Dr.-Ing. R. Döring
und Dr. J. Fricke, Patentanwälte,
München 2, Josephspitalstr. 7Dipl.-Ing. F. Thieleke, Dr.-Ing. R. Doering
and Dr. J. Fricke, patent attorneys,
Munich 2, Josephspitalstr. 7th

Als Erfinder benannt:
Carlo Vichi,Named as inventor:
Carlo Vichi,

Guglielmo Cesari, Mailand (Italien)Guglielmo Cesari, Milan (Italy)

Beanspruchte Priorität:Claimed priority:

Italien vom 21. April 1961 (12463)Italy of April 21, 1961 (12463)

den in axialer Richtung aufeinanderfolgenden Ausnehmungen für die Kontaktelemente in axialer Richtung durch Schultern begrenzte Wickelräume für die die beiden Schienen über den Abschnitten der Kontaktelemente zusammenhaltenden Wicklungen aufweisen und mit ihren Enden oder wicklungsfreien Bereichen in Ausnehmungen der Scheiben federnd einschiebbar sind.the recesses for the contact elements following one another in the axial direction in the axial direction winding spaces limited by shoulders for the two rails above the sections of the contact elements have cohesive windings and resilient with their ends or winding-free areas in recesses of the discs are retractable.

Ein solches erfindungsgemäß aus zwei Schienen gebildetes Tragelement aus Isolierstoff haltert die Kontaktelemente zwischen sich durch einfache Klemmwirkung und unter ausreichender Isolierung, wobei die Wicklungen selber zur Erzielung der erforderlichen Klemmkraft dienen. Daher können die beiden Schienen auf den Abschnitten zwischen den Kontaktelementen geringfügig dadurch nachgeben, was einmal eine einfache Klemmhalterung der Schienen in den Flanschscheiben ohne weitere Haltmittel gestattet und gleichzeitig Gewähr dafür bietet, daß die Wicklungen durch die Schienen stets straff in ihrer Lage gehalten werden.Such a support element made of insulating material, formed according to the invention from two rails, supports the Contact elements between them by simple clamping effect and with sufficient insulation, the windings themselves serve to achieve the required clamping force. Hence the two can Rails on the sections between the contact elements give way what once was a simple clamp mounting of the rails in the flange washers without any further holding means permitted and at the same time ensures that the windings are always taut through the rails their location.

Die Erfindung wird nachfolgend an Hand einer schematischen Zeichnung an einem Ausführungsbeispiel näher erläutert.The invention is illustrated below with reference to a schematic drawing of an exemplary embodiment explained in more detail.

Das Tragelement für die Wicklungen besteht aus einem Paar Schienen 1, 2 aus isolierendem Material,The support element for the windings consists of a pair of rails 1, 2 made of insulating material,

709 510/214709 510/214

Claims

on which the windings 4 to 7, which are spaced in the direction of the longitudinal extent of the rails by the slots fixing the contact elements 3 a to 3 h , are wound.

The contact elements 3 a to 3 h are identical to one another and each consist of a section that protrudes from the pair of rails 1, 2 and a section that lies between the rails 1, 2 and keeps them spaced from one another. The windings 4 to 7 wound on the support element press the rails 1, 2 against the inner section of the contact elements and hold the rails together. The fact that the windings are angled over the edges of the rails prevents the conductor from slacking off during the winding process within the limits given by the contact elements and ensures that the rails are held together during the winding process.

The windings 4 to 7 can also be continued beyond their winding spaces located between the individual slots holding the contact elements, as indicated in the drawing for the winding 6 , because the winding end between the two rails can be returned to the associated contact element without interruption.

The support element of this type can be built into a channel selector for television sets. In the drawing, a channel selector is shown, which has two disks 9, 10 which are fixed at a distance from one another on a shaft 8 which is provided at one end with a rotary knob not shown in the drawing. The disk 10 is equipped with a number of recesses 11 distributed along a circle, in each of which one end of a pair of rails is anchored. For a better understanding, only two pairs of rails are shown. The disk 9 is equipped with a corresponding number of radially arranged recesses 12 , into each of which a pair of rails is inserted, namely at a point where there are no windings and contact elements, so that the rails are elastically pressed against one another in the recesses. The contact elements 3 α to 3 h are directed radially outward and form a row of movable contacts which can be connected to corresponding, fixed contacts 13 a to 13 h . These fixed contacts are fastened on a carrier which consists of two rails 14, 15 made of insulating material and directed parallel to the shaft 8. The fixed contacts 13a to 13h are designed in the form of resilient clips into which the outer section of the respective associated contact element 3a to 3h can be inserted.

The rails 14, 15 are also provided with notches for fixing two connection lugs 17 , 18, to each of which a capacitor plate is attached, between which a tuning disk 19 can be inserted for tuning to resonance, which in turn is attached to a sleeve 20 rotatable on the shaft 8 which is rotatable with a rotary knob, not shown, whereby the capacitance of the capacitor formed by the plates 17, 18 can be changed by means of the disk 19 independently of the position of the channel selector.

To fix the channel selector in the individual positions, a spring 16 is provided which snaps into the recesses of the disc 9 , whereby the movable contacts are held in the relevant positions within the fixed contacts 13 a to 13 h and undesired rotation of the drum is prevented .

Claim:

Channel selector for television sets with a rotatable drum, consisting of a shaft, axially spaced discs on it and circumferentially distributed elongated support elements made of insulating material, which are received in recesses in the discs and as a carrier for contact elements protruding outward with a section and at the same time as serve bobbin for a winding, characterized in that each supporting element consists of two at a mutual circumferential spaced parallel rails (1, 2) which on the mutually facing surfaces of slots for loosely receiving a at the same time serving as a spacer for the rail portion of the contact elements ( 3) , between the recesses for the contact elements that follow one another in the axial direction in the axial direction by shoulders have winding spaces for the windings holding the two rails together over the sections of the contact elements and with their ends or the like of the winding-free areas in recesses (11, 12) of the disks (9, 10) can be pushed in resiliently.

Considered publications:

German Patent No. 940 307;
German Auslegeschriften Nos. 1027743, 1032348, 1070297, 1121 665;
French Patent No. 1217787;
U.S. Patent No. 2762581.

1 sheet of drawings