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Variable speed video camera

  • US 4,695,891 A
  • Filed: 11/13/1986
  • Issued: 09/22/1987
  • Est. Priority Date: 11/13/1986
  • Status: Expired due to Fees
First Claim
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1. A variable speed video camera comprising:

  • an image sensor for producing a video signal representative of an image of a scene;

    first and second shutter discs, each of which has an aperture which is alignable with said image sensor;

    first and second hollow shaft means for respectively rotatably mounting said first and second shutter discs, said first shaft means being rotatably and slidably mounted on a portion of said second shaft means;

    a cable which is connected at one end to said first shaft means, which extends through said first and second hollow shaft means and which is connected at its other end to a control member;

    linkage means for linking said first and second hollow shaft means for concurrent axial and rotational displacement in a helical locus with respect to each other;

    means for rotating said first and second shaft means at a predetermined rotational speed thereby rotating said first and second shutter discs at said predetermined speed; and

    means for actuating said control member in response to a change in signal intensity of said sensor to thereby move said cable to cause said first shaft means to move in said helical locus of displacement relative to said second shaft means whereby said first and second shutter discs are rotated relative to each other to change the relative opening between said discs and thereby the shutter speed at which said sensor is exposed to said image.

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