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HANDHELD MEASURING INSTRUMENT WITH MULTIPLE CONTROLS OPERABLE BY THE HOLDING HAND

  • US 3,609,545 A
  • Filed: 09/10/1969
  • Issued: 09/28/1971
  • Est. Priority Date: 09/10/1969
  • Status: Expired due to Term
First Claim
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1. A handheld thermocouple pyrometer, comprising:

  • a. a casing and a handle supporting said casing;

    b. a temperature-calibrated scale on the face of said casing;

    c. terminal means for connecting the output of a thermocouple to said pyrometer;

    d. a slide wire potentiometer in said casing, electrically connected to measure the output potential of said thermocouple, said potentiometer having a rotatable arm and a fiduciary pointer rotatable therewith, said pointer overlying said scale, the axis of rotation of said arm and pointer being transverse to the plane of said scale;

    e. a galvanometer in said casing electrically connected to said potentiometer to indicate the balance thereof, said galvanometer having a current-indicating pointer overlying said scale, said galvanometer body being movable with respect to said scale by rotation about the said axis of rotation for said potentiometer arm and fiduciary pointer whereby said rotation effects translation of said current-indicating pointer across said scale; and

    f. potentiometer arm adjustment means for adjusting the balance of said potentiometer, said means being rigidly connected to said potentiometer arm and said galvanometer body, whereby said galvanometer body and said arm are rotated together, whereby balancing of said potentiometer may be indicated by coincidence of said fiduciary pointer with said galvanometer pointer over said scale.

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