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Photograph multiplying factor automatic-counting scale

  • US 4,262,193 A
  • Filed: 01/29/1979
  • Issued: 04/14/1981
  • Est. Priority Date: 09/22/1978
  • Status: Expired due to Term
First Claim
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1. In an automatic photograph measurement, multiplying and counting apparatus for providing digital measurements of distances appearing in a photograph, said apparatus having:

  • (1) an elongated straight piece (1) for placing on a photograph along a distance to be measured;

    (2) an elongated guide scale (6) coupled to and disposed alongside said piece (1);

    (3) detecting scale head means (7) disposed for slidable engagement along said scale (6) including a control button (10a) thereon;

    (4) a transparent plate (8) projecting from said head means (7) with a reference line (9) thereon to be placed at a reference point on a photograph to be measured;

    (5) a pulse generator coupled to said piece (1) and said button (10a), with gating circuitry providing pulse signals per unit length in proportion to the movement of said head means (7);

    (6) a binary coded decimal counter (3) including conversion in said apparatus coupled to said pulse generator, receiving and counting said pulse signals and converting them into binary coded decimals;

    (7) mathematical circuit means including interface circuitry coupled to the output of said counter (3);

    (8) display means (18) coupled to said mathematical circuit means;

    the improvement therein comprising;

    (8) first and second pulleys (21,

         22) at one and the other end of said piece and an endless wire between said pulleys;

    (9) a rotary encoder pulse generator acting as said pulse generator, said rotary encoder being mounted at said one end of said piece (1) coupled to and responsive to said first pulley; and

    ,(10) said head means being coupled to said wire so that the movement of said head means along said scale turns said rotary encoder to generate pulses.

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