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ROTATABLE PUSHBUTTON CONTROL OF MOVABLE RESISTOR CONTACT AND OF SWITCH CONNECTIONS THERETO

  • US 3,624,582 A
  • Filed: 10/27/1969
  • Issued: 11/30/1971
  • Est. Priority Date: 11/11/1968
  • Status: Expired due to Term
First Claim
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1. In a control device comprising a series of variable resistors provided in correspondence to a series of channels to be tuned, said resistors being constructed in a single module, a plurality of operating shafts of a number corresponding to that of the channels, a plurality of sliding members provided respectively for said variable resistors, and a mechanism for converting the operation of said operating shafts to the movement of the corresponding sliding members, so that a voltage is controlled by controlling any one of said variable resistors through the operation of said operating shaft;

  • the improvement comprising;

    a baseplate consisting of an insulating material on which are provided, in the form of a module, two lead wires connected to both ends of said variable resistors respectively, a tap lead wire adapted to be connected through respective electric switch means to said sliding members, and a number of pairs of fixed contacts on said base corresponding to said channels respectively;

    a plurality of rotatable operating shafts corresponding to said channels respectively arranged in a spaced apart relationship from said variable resistors, each of said rotatable operating shafts being provided with screw threads on a part located above said variable resistors, so that a guiding portion thereof is formed;

    a plurality of sliding members mounted respectively on said rotatable operating shafts and shifted by the rotation of said operating shafts along said guiding portions; and

    switch means cooperating with each of said operating shafts for opening or closing a circuit between the corresponding pair of fixed contacts, one of said pair of contacts being connected to said tap lead wire and the other of said pair being connected to said sliding member through said operating shaft;

    whereby a voltage obtained between said tap lead wire and one of said two lead wires can be controlled by rotating said operating shafts.

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